GCE-II Question 2: Domain Patterns
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Research QuestionQ2: How do the spatial and temporal patterns of biogeochemical processes, primary production, community dynamics, decomposition, and disturbance vary across the estuarine landscape, and how do they relate to environmental gradients? OverviewVariability in external forcing (documented in Q1) is manifest as environmental gradients (e.g., gradients in salinity or nutrients) within the coastal landscape. These environmental gradients cause variations in local biological, chemical, and geological processes, which in turn may feed back to affect environmental gradients. This complex set of interactions produces the observed ecosystem patterns across the landscape. In order to understand these interactions, it is necessary to describe temporal and spatial patterns of biotic and abiotic variables. We collect data on physical oceanographic conditions, nutrients and organisms in the water column; groundwater hydrology and biogeochemistry; and intertidal marsh soil, plant, microbial and animal dynamics. Although data are collected throughout the domain, we have a primary focus on conditions in the Duplin River, which is at the heart of our system. The variables of interest to us span all five of the LTER core research areas. Research Components
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Research Question BackgroundThe GCE LTER domain is located along three adjacent sounds on the Georgia coast (Altamaha, Doboy, Sapelo) and encompasses upland (mainland, barrier islands, marsh hammocks), intertidal (fresh, brackish and salt marsh) and submerged (river, estuary, continental shelf) habitats. We are interested in 1) how variability in environmental forcing (Q1) creates environmental gradients (e.g., gradients in salinity or nutrients) within our study area, and 2) how these environmental gradients affect a variety of ecosystem processes. The GCE has 10 core monitoring sites distributed along an onshore-offshore gradient across three sounds (Fig. 2-1). Spatial variability in environmental forcing creates a wide range of environmental conditions across the GCE monitoring sites, which range from tidal fresh to tidal marine systems (Table 2-2). Daily variation in Altamaha River discharge is reflected in the salinity regime at most GCE sites (Table 2-3). An exception to this is site 1, where salinity is better correlated with recent precipitation than with river discharge, suggesting a higher degree of groundwater influence We are currently using these monitoring data to explore spatial variation in ecosystem processes (e.g., questions 3, 4 and 5 all rely on background data provided by the monitoring program). In addition, we expect to eventually correlate annual variation in estuarine processes with Altamaha River discharge, rainfall, sea level and resulting salinity patterns. For example, changes in Altamaha River discharge are reflected in salinity and water quality, with NOx dominating dissolved nitrogen loading during low flow but DON increasing in importance during high flow (Weston et al. 2003), and annual monitoring has identified considerable variability in plant biomass, the proportion of stems flowering, and the location of borders between vegetation zones (Fig. 2-8). Similarly, annual monitoring of invertebrates has identified considerable temporal variation in abundance and distribution patterns across the GCE domain. Initial data suggest that temporal population variation of plants and animals is correlated with environmental drivers, but rigorously documenting these relationships will require additional data. In addition to our core monitoring program, we have obtained external funding for several other projects that address how ecosystem processes in the GCE domain are driven by environmental forcing. |
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Water ColumnMooringsLong-term measurements of conductivity, temperature and sub-surface pressure are collected at 30 minute intervals at 8 sites in the GCE-LTER domain, as described below. The long-term objective of this network is to document spatial and temporal variability of salinity and its relationship to water level and river discharge. Monitoring sites were chosen to span the salinity gradient as well as to take advantage of existing physical structures (e.g. docks or pilings) for mounting instruments. The long-term moorings are located in transect regions used for quarterly oceanographic surveys and near to GCE-LTER marsh study sites. Oceanographic cruisesWe run regular cruises to measure the surface water concentrations of dissolved and particulate materials at core stations located across the GCE domain. This includes dissolved inorganic nutrients (nitrite, nitrate, ammonium, phosphate, and sulfate), dissolved organics (DOC, TDN, DON, TDP, and DOP); chlorophyll a samples; total suspended sediment and particulate CN samples. We also deploy a Seabird SBE-25 CTD to collect vertical profiles of conductivity, temperature and dissolved oxygen at each station. This program transitioned from quarterly cruise sampling (during GCE-I) to monthly sampling during 2006-2007 (GCE-II). An additional monitoring station was added in summer 2008 at the mouth of Altamaha Sound (AL-02) to better capture the near-shore end member for that system. Additional studiesOther studies have addressed system metabolism based on DIC analysis, tidal harmonics at the GCE monitoring sites, waves, turbulence and circulation in the Altamaha River Estuary, salinity variations across the GCE domain, sea level fluctuation induced by winds along the continental shelf and culture-independent characterization of DOC-transforming bacterioplankton. GroundwaterWellsGroundwater enters the GCE domain via sub-marsh flow, at seepage fronts, and as baseflow to tidal creeks. We have well fields at two sites (GCE 4 and 10) that are sampled regularly for nutrients and water level (wells previously installed at GCE 3 are no longer flowing). We also have instrumented wells located on two marsh hammocks that were set up as part of our efforts to evaluate controls of upland/intertidal gradients lateral gradients (Q4). Time series of well water level fluctuations can be used to identify the predominant flow paths at each site. Analyses of these time series during GCE I by C. Ruppel identified an asymmetric tidally-induced groundwater signal at site 10, which indicates that the hammock's surficial aquifer responds like a confined aquifer to fluctuations in the Duplin River. Thus, we infer relatively low discharge rate or material exchange between the hammock and the tidal creek. At site 3, Ruppel documented a high degree of hydraulic connectivity between marsh monitoring wells proximal to the upland and the tidal creek, implying the presence of a high permeability pathway between the two and leading us to conclude that submarsh groundwater flow was a reasonable flow pathway along this salinity gradient. At site 4, on the landward side of the GCE, there is a "normal" signal in which the marsh acts as a low-pass filter for the tidal fluctuations, and there is relatively little evidence of submarsh flow. This site is heavily dominated by the influence of surface water flow. MarshesSoilsThe ability of estuarine marshes to grow upwards or accrete vertically is controlled by both physical and biological processes. We are measuring rates of marsh accretion, sedimentation and organic matter (as organic C) accumulation at the ten GCE core sites to characterize spatial and temporal patterns of marsh accretion and to identify relationships between freshwater pulses and processes that control marsh stability. We measure vertical accretion and sedimentation using sedimentation-erosion tables (SETs) and feldspar marker layers. The SET consists of a fixed elevation benchmark constructed using aluminum pipe sunk 10-20 feet into the soil and filled with concrete. A measuring device (the SET "head") is placed on top of the benchmark and a series of measurements (36 in all) are made at fixed angles and distances within 2 meters of the benchmark. Repeated measurements made at fixed points in the marsh enable us to quantify small-scale changes in marsh accretion and subsidence over time PlantsWe monitor plant biomass to test the hypothesis that end-of-year biomass varies as a function of 1) freshwater discharge from the Altamaha (especially in low-marsh plots), 2) local rainfall (especially in high-marsh plots), and 3) average sea level. In 2000 we set up permanent plots at all 10 LTER monitoring sites. Plots were established at creek-bank and mid-marsh sites (8 plots/zone/site). An additional zone (high marsh Juncus) was established at site 10 in 2005 to increase replication of sites with Juncus. Plants have been non-destructively monitored (stem counts, heights, flowering status) in October of every year from 2000 to the present, with data submitted to the GCE database. Plots are also proving useful in documenting spatial and temporal variation in disturbance from physical (wrack) and biotic (grazing) sources. MicrobesS. Newell (UGAMI) evaluated living fungal biomass within standing-decaying, ramet forming marsh macrophytes to examine spatial and temporal variation in fungal secondary production. Fungi were sampled in conjunction with the fall macrophyte monitoring at the 10 GCE sites from 2000-2003. Living-fungal content of decaying leaf blades was measured as ergosterol, along with the determination of the fungal species and the rate of expulsion of sexual spores (ascospores). A GCE I directed project led by J.T. Hollibaugh, M. Moran and S. Newell also examined interactions between fungi and bacteria in the salt marsh decomposition processes. DNA-based approaches, including amplification and analysis of bacterial 16S rRNA genes and fungal ITS regions, along with direct-microscopic identification of fungal species, were used to identify bacteria and fungi associated with decaying S. alterniflora in Georgia coastal marshes. They found that there are no major cryptic fungal decomposers (one might have expected the existence of cryptic, unculturable species based on examinations of natural-bacterial-community DNA) -- the species of ascomycetes detectable by direct microscopy were also the culturable species detected by analysis (PCR/TRFLP with ITS) of DNA extracted from naturally decaying leaves. Significant spatial relationships were found between individual bacterial and fungal taxa over a 13 month period and for two stages of plant decay, even as the microbial community composition shifted seasonally. Although the mechanisms underlying these spatial relationships are not yet known, they may portend important functional relationships between bacteria and fungi. AnimalsMarine invertebrate population monitoring was initiated at the ten GCE monitoring sites in October 2000. Sampling was conducted twice a year (June and October) until 2006, but we found no significant difference in population size estimates made in the spring or fall for most of the common species so sampling was reduced to the fall only. Animal sampling areas are located several meters away from each permanent vegetation plot, and sampled for epifauna and macroinfauna. Terrestrial invertebrate populations are also monitored. This effort tests the hypothesis that grasshopper abundance varies among sites and years as a function of site characteristics and angiosperm production. Grasshoppers have been visually counted on transects (mid-marsh, 8-10/site) at the 10 GCE monitoring sites in each August since 2000. Grasshopper populations are dominated by two common taxa, but densities differ more than ten-fold among sites. The rank-order of sites is similar among years, suggesting that some sites consistently supported high grasshopper populations and other sites consistently supported low populations. Expanded monitoring at 30 sites in 2003 indicated that grasshoppers were common at sites with extensive adjacent upland, but were absent at mid-estuary sites that had extensive Spartina zones but lacked upland habitats. Additional StudiesAdditional studies have addressed blue crab habitat use, invasive crab species, linkages between benthic diatoms and oysters, sulfate reduction in Dean Creek sediments, assimilatory and dissimilatory sinks of nitrate and trophic dynamics of American Alligators. Duplin RiverThe Duplin River, at the geographic center of the GCE domain, is the site of an ongoing directed study of the exchange processes between subtidal and intertidal areas. Water exchange occurs in a complex network of channels that alternately flood and dry large intertidal areas: approximately 80% of the watershed of the Duplin is intertidal salt marsh and mudflat. We have used a multi-tiered approach to address the interactions between the estuarine water and the extensive intertidal areas that surround it. Duplex ExperimentSeven GCE-LTER PIs participated in a directed study of the exchange processes between a large tidal creek and its adjacent intertidal areas during the time period of 12-21 August 2003 - a time when metabolic activity in the study area was at its annual maximum. High-resolution sampling of geochemical variables was undertaken to see if changes can be detected between water that goes onto the marsh and that which comes off. Attention focused on sampling small peripheral creeks which drain the marsh and on measuring spatial changes of tidal currents and other properties. Part of the study was designed to place the detailed work in the Duplin into a larger context by measuring and comparing metabolic rates in the marsh-estuarine-shelf continuum. 
Map of Duplin River study area showing locations of in situ measurements of currents, temperature, salinity, bottom pressure and water-column sampling. ModelingJ.Blanton (SkIO) worked in collaboration with F. Andrade (Univ. of Lisbon), M. Adelaide Ferreira (IMAR-Marine Laboratory, Portugal) and J. Amft (SkIO) to construct a high resolution DEM for the system. They completed the classification and analysis of a series of 7 aerial infrared images of the Duplin River, covering low water (LW) to high water (HW). For each pass, a total of eight images were obtained on infrared (IR) film. The photographs were processed to yield the water surface area as a function of time. Subsurface pressure gages deployed along the tidal creek were used to determine the vertical reference level for the corresponding flooded area. The analyses of these images were used to construct curves relating flooded area to water level. 
Water level curves for 15 April 2004 along the axis of the Duplin River. The red vertical lines (T1 through T7) show the times of each aerial pass. The locations of the three curves are shown in the image on the right. Water level at a given time varies within 0.1 m over a distance of 7 km, so water surface is assumed to be horizontal over the 2 min duration of a single pass of the airplane. Other modeling studies have examined salt transport and diffusion parameters and salt budgets in the Duplin, and biogeochemical dynamics at Moses Hammock. Groundwater hydrologyGroundwater geochemistry data were collected by Snyder (2002) for 9 months (July 2000 to May 2001) using monitoring wells and special multilevel sampling wells installed across Moses Hammock. Because Moses Hammock is bound on one side by a tidal river (Duplin River) and on the other side by a salt marsh flooded only sporadically, the site provides a microcosm for the study of groundwater chemistry in larger coastal islands lying between estuaries/lagoons and the open ocean. The spatial and temporal distribution of major ions associated with seawater (especially chloride) in the aquifer along transects across Moses Hammock indicates that the freshwater lens is resisting seawater intrusion by maintaining constant advection across the salinity gradient. A quasi steady-state seems to be reached at least during the nine months of this study. Our results indicate that redox reactions associated with natural organic matter oxidation also play an important role at the salinity transition along both transects. Oxygen, manganese, iron, and sulfate reduction occur sequentially both from the saline creek bank and from the salt marsh to the low ionic strength interior of the aquifer in accordance with the decreasing Gibbs free energy yield for the oxidation of organic matter (Snyder et al., 2003). In turn, the spatial distribution of reduced iron and manganese across the freshwater lens suggests that the interior of the aquifer contains little reactive natural organic matter. Remote sensingThe intertidal topography of the Duplin River was determined from a series of 7 infrared aerial images of the watershed, taken at approximately 1 hr intervals spanning low to high tide. Spectrum North Carolina, Inc conducted the aircraft mission. The images had a pixel resolution of 1 m2, and analysis of each image yielded the water surface area as a function of time. Subsurface pressure gages deployed along the tidal creek were used to determine the vertical reference level for the corresponding flooded area. By categorizing individual pixels as flooded or exposed and linking this information to contemporaneous tide recordings, the data were used to build an elevational map of much of the intertidal zone in the watershed. Additionally, AISA hyperspectral imagery of the Duplin River was acquired by the NOAA-sponsored Environmental Cooperative Science Center (ECSC) in June 2006 and August 2007. J. Shalles (Univ. of Nebraska), who is leading this effort, is using the ENVI software programs incombinion with field clip plot data to generate predictive algorithms for identification of marsh vegetation type and productivity. Thermal IR imaging is also being used to provide visual identifications and a geospatial location of sites where groundwater discharges into the marsh, and in March 2009 Airborne Laser Swath mapping (ALSM) of the Duplin River and Blackbeard Island was conducted by the National Center for Airborne Laser Mapping (NCALM) at the University of Florida to produce DEMs of the Duplin. Additional studiesOther studies in the Duplin have addressed seston variability, temporal and spatial variability of transport and mixing mechanisms, plant community assemblages and porewater biogeochemistry. |
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Duplin RiverDUPLEX experimentDUPLEX experiment Plant community assemblages within the GCE Suspended particulate matter and nutrients in the Duplin River, Georgia Additional studiesEnergy dissipation in the Duplin River Heat and salt flux estimates in the Duplin River Hypsometric curves of the Duplin River Water flow in the Duplin River Groundwater hydrologyDuplin groundwater sampling Remote SensingThermal IR imagery analysis of the Duplin River, Georgia Additional studiesDuplin River flow measurements in collaboration with CCU groundwater surveys Duplin River seston variability Additional StudiesLateral variability of sediment deposition across tidal bars GroundwaterWellsCabretta Island Groundwater Monitoring GCE groundwater well monitoring Subsurface fluxes Additional studiesGCE groundwater biogeochemistry MarshesAnimalsMarine invertebratesInvasive invertebrate species within the GCE Marine invertebrate monitoring Patterns of mud snail and ribbed mussel abundance in the GCE Terrestrial invertebratesTerrestrial invertebrate monitoring Additional studiesAmerican alligator trophic dynamics in the GCE Benthic diatoms in food webs Consumer diversity impacts in salt marshes Spartina Mussel Resilience Project MicrobesMolecular comparison of ascomycete fungal communities PlantsLong term monitoring of salt pans at Marsh Landing BiomassPlant biomass monitoring Rainfall variationEffect of rainfall variation on high marsh plants SuccessionMarsh vegetation recovery from disturbance and competition in secondary succession Additional StudiesAnalysis of historic vegetation changes using aerial photographs and GIS Additional studiesCan less palatable plants buffer Spartina against runaway consumption Marsh plant diversity in Georgia and Texas Onmivorous crab top-down control on an arthropod food web Plant strategies across steep environmental gradients of a salt marsh Plant zonation patterns in Georgia tidal marshes Processing of salt marsh plant litter by detritivores Salt marsh dieback in Georgia and Louisiana Spatial variation in nutrient effects on marsh community structure Additional StudiesSurvey of genetic and epigenetic diversity across Borrichia frutescens and Spartina alterniflora sites (follow-up to Richards et al 2004 Ecology Letters) SoilsGCE LTER Sedimentation-Erosion Table (SET) Monitoring Additional studiesBenthic fluxes to the overlying water column Benthic primary production Organic matter cycling and iron reduction Organic matter mineralization and sulfate reduction Terminal metabolism Water columnMooringsGCE Long-term Hydrographic Monitoring Additional studiesSalinity variations across the GCE domain Sea level fluctuation induced by winds on the continental shelf Tidal harmonics at the GCE monitoring sites Waves, turbulence, and circulation in the Altamaha River estuary Oceanographic cruisesCTDGCE CTD monitoring surveys Water qualityGCE water quality monitoring Additional studiesChlorophyll distributions in the Altamaha River |
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Journal ArticlesLiu, W. and Pennings, S.C. 2019. Self-thinning and size-dependent flowering of the grass Spartina alterniflora across space and time. Functional Ecology. 33:1830-1841. (DOI: 10.1111/1365-2435.13384) Li, S., Hopkinson, C.S., Schubauer-Berigan, J.P. and Pennings, S.C. 2018. Climate drivers of Zizaniopsis miliacea biomass in a Georgia, U.S.A. tidal fresh marsh. Limnology and Oceanography. 63:2266-2276. (DOI: 10.1002/lno.10937) Hunter, E., Nibbelink, N., Alexander, C.R. Jr., Barrett, K., Mengak, L., Guy, R., Moore, C. and Cooper, R. 2015. Coastal vertebrate exposure to predicted habitat changes due to sea level rise. Environmental Management. (DOI: 10.1007/s00267-015-0580-3) Nifong, J.C., Lowers, R., Silliman, B.R., Abernathy, K. and Marshall, G. 2013. Attachment and deployment of remote video/audio recording devices (Crittercam) on wild American alligators (Alligator mississippiensis Duadin 1801). Herpetological Review. 44(2):243-247. Meile, C., Porubsky, W.P., Walker, R.L. and Payne, K. 2009. Natural Attenuation Of Nitrogen Loading From Septic Effluents: Spatial And Environmental Controls. Water Research. 44(5):1399-1408. (DOI: 10.1016/j.watres.2009.11.019) Alber, M., Swenson, E.M., Adamowicz, S.C. and Mendelssohn, I.A. 2008. Salt marsh dieback: An overview of recent events in the US. Estuarine, Coastal and Shelf Science. 80:1-11. (DOI: 10.1016/j.ecss.2008.08.009) Kunza, A.E. and Pennings, S.C. 2008. Patterns of plant diversity in Georgia and Texas salt marshes. Estuaries and Coasts. 31:673-681. McFarlin, C.R., Brewer, J.S., Buck, T.L. and Pennings, S.C. 2008. Impact of fertilization on a salt marsh food web in Georgia. Estuaries and Coasts. 31:313-325. McKay, P. and Di Iorio, D. 2008. Heat budget for a shallow, sinuous salt marsh estuary. Continental Shelf Research. 28:1740–1753. (DOI: 10.1016/j.csr.2008.04.008) Di Iorio, D. and Kang, K. 2007. Variations of turbulent flow with river discharge in the Altamaha River Estuary, Georgia. Journal of Geophysical Research - Oceans. 112:C05016. (DOI: 10.1029/2006JC003763) Pennings, S.C., Zimmer, M., Dias, N., Sprung, M., Davé, N., Ho, C.-K., Kunza, A., McFarlin, C., Mews, M., Pfauder, A. and Salgado, C. 2007. Latitudinal variation in plant-herbivore interactions in European salt marshes. Oikos. 116:543-549. Kang, K. and Di Iiorio, D. 2005. Depth- and current-induced effects on wave propagation into the Altamaha River Estuary, Georgia. Estuarine, Coastal and Shelf Science. 66:395-408. Richards, C.L., Pennings, S.C. and Donovan, L.A. 2005. Habitat range and phenotypic variation in salt marsh plants. Plant Ecology. 176:263-273. Goranson, C.E., Ho, C.-K. and Pennings, S.C. 2004. Environmental gradients and herbivore feeding preferences in coastal salt marshes. Oecologia. 140:591-600. Higinbotham, C.B., Alber, M. and Chalmers, A.G. 2004. Analysis of Tidal Marsh Vegetation Patterns in Two Georgia Estuaries Using Aerial Photography and GIS. Estuaries. 27(4):670-683. Richards, C.L., Hamrick, J.L., Donovan, L.A. and Mauricio, R. 2004. Unexpectedly high clonal diversity of two salt marsh perennials across a severe environmental gradient. Ecology Letters. 2004(7):1155-1162. Zimmer, M., Pennings, S.C., Buck, T.L. and Carefoot, T.H. 2004. Salt Marsh Litter and Detritivores: A Closer Look at Redundancy. Estuaries. 27(5):753–769. Buck, T.L., Breed, G.A., Pennings, S.C., Chase, M.E., Zimmer, M. and Carefoot, T. 2003. Diet choice in an omnivorous salt marsh crab: different food types, claw allometry, and habitat complexity. Journal of Experimental Marine Biology and Ecology. 292:103-116. (DOI: 10.1016/S0022-0981(03)00146-1) Callaway, R.M., Pennings, S.C. and Richards, C.L. 2003. Phenotypic plasticity and interactions among plants. Ecology. 84(5):1115-1128. Zimmer, M., Pennings, S.C., Buck, T.L. and Carefoot, T.H. 2002. Species-specific patterns of litter processing by terrestrial isopods (Isopoda: Oniscidea) in high intertidal salt marshes and coastal forests. Functional Ecology. 16:596-607. Books and Book SectionsBlanton, J.O., Andrade, F. and Adelaide Ferreira, M. 2006. The relationship of hydrodynamics and morphology in tidal-creek and salt-marsh systems in South Carolina and Georgia. Pages 93-107 in: Kleppel, G.S., DeVoe, M.R. and Rawson, M.V. (editors). Implications of changing land use patterns to coastal ecosystems. Springer-Verlag, New York, NY. Theses and DissertationsMcKnight, C.J. 2016. A modelling study of horizontal transport and residence time in the Duplin River estuary, Sapelo Island GA. M.S. Thesis. University of Georgia, Athens, GA. Smith, C.B. 2001. Analysis of historic vegetation changes in two Georgia estuaries using aerial photography and GIS. M.S. Thesis, University of Georgia, Athens, Georgia. 93 pp. Conference Papers (Peer Reviewed)Porubsky, W.P. and Meile, C. 2009. Controls on groundwater nutrient mitigation: Natural attenuation of nitrogen loading from septic effluents. In: Hatcher, K.J. (editor). Proceedings of the Georgia Water Resources Conference. Athens, Georgia. Conference Posters and PresentationsMiklesh, D.M., O'Donnell, J., Schalles, J.F. and Meile, C. 2018. Poster: Analysis of decadal-scale patterns of Spartina biomass in Georgia marshes using soil modeling and satellite imagery. Ocean Sciences Meeting, Feb 11-16, 2018, Portland OR. Craft, C.B., Stahl, M. and Widney, S. 2017. Presentation: Tidal freshwater forests: sentinels for climate change. 10th International Workshop on Nutrient Cycling and Retention in Natural and Constructed Wetlands, September 21-24, Trebon, Czech Republic. Stahl, M., Widney, S. and Craft, C.B. 2017. Presentation: Tidal freshwater forests: a sentinel for climate change. SPEA Ph.D. Students' 17th Annual Conference, February 24, 2017, Bloomington, IN. Widney, S., Stahl, M. and Craft, C.B. 2017. Presentation: Tidal forests: sentinels for climate change. Society of Wetland Scientists Annual Meeting, June 8, 2017, San Juan, Puerto Rico. McKay, P. and Di Iorio, D. 2009. Poster: Tidal correlations, groundwater and the reversing salinity gradient in a tidal creek. 2009 Gordon Research Conference on Coastal Circulation, Jun 10, 2009, Colby Sawyer College, New London, NH. Pennings, S.C., Buck, T.L., Lynes, A.R. and Grace, J.B. 2009. Poster: Centrifugal organization of vegetation in salt marsh plant communities. 2009 LTER All Scientists Meeting, September 14-16, 2009, Estes Park, Colorado. Alber, M., Schaefer, S.C., Pomeroy, L.R., Sheldon, J.E. and Joye, S.B. 2008. Presentation: Nitrogen inputs to the Altamaha River estuary (Georgia, USA): a historic analysis. American Society of Limnology and Oceanography, 3/08, Orlando, FL. Alber, M., Mackinnon, J., Hurley, D. and Curran, M.C. 2007. Presentation: Salt Marsh Dieback in Georgia. Estuarine Research Federations 2007 Annual Meeting, 4-8 November 2007, Providence, Rhode Island. Hester, M.W., Mendelssohn, I.A., Alber, M. and Joye, S.B. 2007. Presentation: Climate-Linked Alteration of Ecosystem Services in Tidal Salt Marshes of Georgia and Louisiana: Preliminary Findings. Estuarine Research Federations 2007 Annual Meeting, 4-8 November 2007, Providence, Rhode Island. Ho, C.-K. and Pennings, S.C. 2007. Presentation: Bergmann¡'s Rule and latitudinal variation in herbivore body size. Joint Ecological Society of America / Society for Ecological Restoration 2007 Meeting, August 5-10, 2007, San Jose, California, USA. McFarlin, C.R., Kenemer, B., Alber, M., Hester, M.W. and Bishop, T.D. 2007. Poster: A Comparison of Dieback Effects on Salt Marsh Invertebrates in Georgia and Louisiana. Estuarine Research Federations 2007 Annual Meeting, 4-8 November 2007, Providence, Rhode Island. Pennings, S.C., Ho, C.-K., Salgado, C., Wieski, K., Dave, N., Kunza, A.E., Wason, E.L. 2007. Presentation: Latitudinal variation in herbivore pressure in Atlantic Coast salt marshes. Joint Ecological Society of America / Society for Ecological Restoration 2007 Meeting, August 5-10, 2007, San Jose, CA. Porubsky, W.P., Meile, C. and Joye, S.B. 2007. Poster: Variations in groundwater biogeochemistry and flow on Moses Hammock (Sapelo Island, GA): Field measurements, laboratory assays, and modeling. American Society of Limnology and Oceanography 2007 Aquatic Sciences Meeting, 4-9 February 2007, Santa Fe, New Mexico. Porubsky, W.P., Meile, C. and Joye, S.B. 2007. Presentation: Using field measurements, laboratory assays and modeling to examine flow conditions and variations in groundwater biogeochemistry. Estuarine Research Federation 2007 Annual Meeting, 4-8 November 2007, Providence, Rhode Island. Alber, M. 2006. Presentation: CSI Ecology: Salt marsh dieback in Georgia. University of Georgia Department of Geology, Athens, Georgia. Alber, M. 2006. Presentation: Losses of foundation species and the consequences for ecosystem structure and function. Working group at the LTER All Scientists Meeting, September 20-24, 2006. Estes Park, Colorado. Alber, M. 2006. Presentation: Salt marsh dieback in Georgia. Sudden wetland dieback meeting, May 24, 2006, Wellfleet, Massachussetts. Ho, C.-K. and Pennings, S. C. Presentation: Preference and performance in plant-herbivore interactions across latitude. 91st Annual Meeting of the Ecological Society of America. August 6-11, 2006, Memphis, Tennessee, USA. Kunza, A.E. and Pennings, S.C. 2006. Poster: Patterns of plant diversity in two salt marsh regions. Long Term Ecological Research Network All-Scientists Meeting, September 20-24, 2006, Estes Park, Colorado. Lyons, J., Alber, M. and Hollibaugh, J.T. 2006. Poster: Molecular comparison of ascomycete fungal communities on Spartina species found along the east, west, and Gulf coasts of the U.S. LTER All Scientists Meeting, September 20-24, 2006, Estes Park, Colorado. Lyons, J.I., Alber, M. and Hollibaugh, J.T. 2006. Poster: Molecular comparison of ascomycete fungal communities on Spartina species found along the east, west, and Gulf coasts of the U.S. Southeastern Estuarine Research Society. March 30-April 1, 2006, St. Augustine, Florida. McKay, P. and Di Iorio, D. 2006. Presentation: Salt and heat fluxes in a sinuous, macrotidal salt channel in the south Atlantic Bight. OS36D-21. AGU Ocean Sciences Meeting, February 2006, Honolulu, Hawaii. Seay, J.E., Bishop, T.D. and Tilburg, C.E. 2006. Poster: Spatial and temporal variations of Porcelain Crab larval abundance in a Georgia Estuary. Southeastern Estuarine Research Society Fall 2006 Meeting, 19 October - 21 October 2006, Savannah, Georgia. Seay, J.E., Bishop, T.D. and Tilburg, C.E. 2006. Poster: Spatial and temporal variations of Porcelain Crab larval abundance in a Georgia Estuary. Southeastern Estuarine Research Society Fall 2006 Meeting, 19 October - 21 October 2006, Savannah, Georgia. Ho, C.-K. and Pennings, S.C. 2005. Poster: Consequences of Omnivory for Trophic Interactions: A Case from Salt Marshes. Ecological Society of America 2005 Meeting - Ecology at multiple scales, August 7-12, 2005, Montreal, Canada. Ho, C.-K. and Pennings, S.C. 2005. Presentation: Consequences of ominivory. The 18th Biennial Conference of the Estuarine Research Federation. Oct. 16-20, 2005, Norfolk, Virginia. Pennings, S.C. 2005. Presentation: Physical forcing and variation in salt marsh plant productivity at multiple time scales. Ecological Society of America 2005 Meeting - Ecology at multiple scales, August 7-12, 2005, Montreal, Canada. Richards, C.L., Donovan, L.A. and Mauricio, R. 2005. Presentation: Selection, but no local adaptation of plant physiological traits in contrasting salt marsh environments. ERF 2005 - The 18th Biennial Conference of the Estuarine Research Federation, October 16-21, 2005, Norfolk, Virginia. Sheldon, J.E. and Alber, M. 2005. Presentation: Beyond whole-estuary flushing times: Using transport times through salinity zones to explain chlorophyll patterns in the Altamaha River estuary (Georgia, USA). Estuarine Interactions: biological-physical feedbacks and adaptations. 2005 Estuarine Research Federation Meeting. October 16-20, 2005, Norfolk, Virginia. Alber, M. 2004. Presentation: Marsh dieback efforts and workshop report. Georgia Coastal Research Council Conference. February 2004, Savannah, Georgia. Alber, M. 2004. Presentation: Marsh dieback studies in Georgia. Georgia Coastal Research Council Marsh Dieback Workshop. February, 2004, Savannah, Georgia. Edmonds, J.W., Weston, N.B., Joye, S.B. and Moran, M.A. 2004. Presentation: Changes in Microbial Community Structure and Activity in Response to Fluctuations in Organic Carbon Pools in Salt Marsh Sediments. Annual Meeting of the American Society of Microbiology. American Society of Microbiology, June, 2004, Atlanta, Georgia. Ogburn, M.B. and Alber, M. 2004. Presentation: An Investigation of Salt Marsh Dieback using Transplant Experiments. Georgia Coastal Research Council Conference. February 2004, Savannah, Georgia. Ogburn, M.B. and Alber, M. 2004. Presentation: Salt Marsh Dieback in Georgia: Field Survey and Transplant Experiments. Semiannual Meeting of the Southeastern Estuarine Research Society. Southeastern Estuarine Research Society, 15-17 April 2004, Ft. Pierce, FL. Weston, N.B. and Joye, S.B. 2004. Presentation: Seasonal patterns of coupling between hydrolytic/fermentative and terminal metabolic microbial communities in an estuarine sediment. ASLO Aquatic Sciences Meeting. American Society of Limnology and Oceanography, 2004, Salt Lake City, Utah. Alber, M., Cronin, T., Giblin, A., Howarth, R., Jay, D., Justic, D., Kimmerer, W., Montagna, P., Knowles, N., Najjar, R., Peterson, B., Scavia, D., Ulanowicz, D. and Walker, H. 2003. Presentation: Effects of climate-induced changes of freshwater inflow on estuaries: Report of the ERF biocomplexity working group. 2003 Estuarine Research Federation meeting. September 2003, Seattle, WA. Andrade, F., Blanton, J.O. and Adelaide Ferreira, M. 2003. Presentation: A digital elevation model of a tidal creek and its relationship to tidal circulation. ASLO 2003, 9-14 February 2003, Salt Lake City, Utah. Bishop, T.D. 2003. Presentation: Invasive biology and status of the green porcelain crab (Petrolisthes armatus) in Georgia waters. South Georgia Invasive Species Workshop, sponsored by The Nature Conservancy and Sapelo Island National Estuarine Research Reserve. October 2003, Brunswick, GA. Bishop, T.D. 2003. Presentation: Invasive biology and status of the green porcelain crab (Petrolisthes armatus) in Georgia waters. South Georgia Invasive Species Workshop, sponsored by The Nature Conservancy and Sapelo Island National Estuarine Research Reserve. October 2003, Brunswick, GA. Bishop, T.D. and Hurley, D. 2003. Poster: The non-indigenous porcelain crab, Petrolisthes armatus: population trends in the Sapelo Island National Estuarine Research Reserve. 2003 Estuarine Research Federation meeting. September 2003, Seattle, WA. Bishop, T.D. and Hurley, D. 2003. Poster: The non-indigenous porcelain crab, Petrolisthes armatus: population trends in the Sapelo Island National Estuarine Research Reserve. 2003 Estuarine Research Federation meeting. September 2003, Seattle, WA. Bishop, T.D. and Hurley, D. 2003. Poster: The non-indigenous porcelain crab, Petrolisthes armatus: population trends in the Sapelo Island National Estuarine Research Reserve. National Estuarine Research Reserve System / National Estuarine Research Reserve Association Annual Meeting. October 2003, Charleston, S.C. Bishop, T.D. and Hurley, D. 2003. Poster: The non-indigenous porcelain crab, Petrolisthes armatus: population trends in the Sapelo Island National Estuarine Research Reserve. National Estuarine Research Reserve System / National Estuarine Research Reserve Association Annual Meeting. October 2003, Charleston, S.C. Bishop, T.D., Hurley, D. and Alber, M. 2003. Presentation: An inventory of the macroinvertebrate fauna of oyster reefs in the Duplin River, Georgia, with emphasis on non-indigenous species occurrence. 2003 Estuarine Research Federation meeting. Sept. 14-18, 2003, Seattle, WA. Bishop, T.D., Hurley, D. and Alber, M. 2003. Presentation: An inventory of the macroinvertebrate fauna of oyster reefs in the Duplin River, Georgia, with emphasis on non-indigenous species occurrence. 2003 Estuarine Research Federation meeting. Sept. 14-18, 2003, Seattle, WA. Hamrick, J.L., Richards, C.L., Donovan, L.A. and Mauricio, R. 2003. Presentation: Genetic diversity and clonal structure of the salt marsh perennial Borrichia frutescens. Society for the Study of Evolution 2003 annual meeting. Chico, CA. Ho, C.-K., Salgado, C.S., Dave, N.B. and Pennings, S.C. 2003. Poster: Latitudinal variation in herbivore densities and damage to plants in coastal salt marshes. Ecological Society of America, August 3-8, 2003, Savannah, GA. Kang, K. and Di Iorio, D. 2003. Poster: Turbulent Mixing in the Altamaha Estuary: An Observation and Model Comparison. 17th Biennial Conference of the Estuarine Research Federation. 14-18 September 2003, Seattle, Washington. McFarlin, C.R., Buck, T.L., Newell, S.Y. and Pennings, S.C. 2003. Poster: Impact of fertilization on the abundance of two detritivorous snails. Embarking on a Decade of Synthesis. 2003 LTER All Scientists Meeting, September 18-21, 2003, Seattle, WA. McFarlin, C.R., Buck, T.L., Newell, S.Y. and Pennings, S.C. 2003. Poster: Impact of fertilization on the abundance of two detritivorous snails. Uplands to Lowlands: Coastal Processes in a Time of Global Change. Aquatic Systems. Ecological Society of America, August 3-8, 2003, Savannah, GA. Ogburn, M.B., Bishop, T.D. and Alber, M. 2003. Poster: Population dynamics of two salt marsh snails in three Georgia estuaries. Southeastern Estuarine Research Society meeting. March 2003, Atlantic Beach, NC. Ogburn, M.B., Bishop, T.D. and Alber, M. 2003. Poster: Population dynamics of two salt marsh snails in three Georgia estuaries. Southeastern Estuarine Research Society meeting. March 2003, Atlantic Beach, NC. Porubsky, W.P., Weston, N.B. and Joye, S.B. 2003. Poster: Examination of denitrification and dissimilatory nitrate reduction to ammonium as pathways for the reduction of inorganic nitrogen in saltmarsh sediment. 17th Biennial Conference of the Estuarine Research Federation. September 2003, Seattle, WA. Porubsky, W.P., Weston, N.B., Lee, R. and Joye, S.B. 2003. Poster: Diel and seasonal patterns of benthic fluxes of nutrients, gases, and dissolved organics from temperate intertidal sediments of Georgia and South Carolina. Long Term Ecological Research All Scientists Meeting. September 2003, Seattle, WA. Porubsky, W.P., Weston, N.B., Lee, R. and Joye, S.B. 2003. Poster: Diel and seasonal patterns of benthic fluxes of nutrients, gases, and dissolved organics from temperate intertidal sediments of Georgia and South Carolina. Long Term Ecological Research All Scientists Meeting. September 2003, Seattle, WA. Porubsky, W.P., Weston, N.B., Lee, R.Y. and Joye, S.B. 2003. Poster: Diel and seasonal patterns of benthic fluxes of nutrients, gases, and dissolved organics from temperate intertidal sediments of Georgia and South Carolina. SECOS Meeting. January 2003, Charleston, SC. Richards, C.L., Donovan, L.A., Mauricio, R. and Hamrick, J.L. 2003. Poster: Patterns of genetic diversity along a severe environmental gradient in a salt marsh perennia. National Estuarine Research Reserve (NERR) 2003 annual meeting. Charleston, SC. Richards, C.L., Donovan, L.A., Mauricio, R. and Hamrick, J.L. 2003. Presentation: Genetic diversity and clonal structure of the salt marsh perennial Borrichia frutescens. Ecological Society of America 2003 Annual Meeting Abstracts. Savannah, GA. Richards, C.L., Donovan, L.A., Mauricio, R. and Hamrick, J.L. 2003. Presentation: Patterns of genetic diversity along a severe environmental gradient in a salt marsh perennial. Estuarine Research Federation 2003 Conference Abstracts. Seattle, WA. Salgado, C., Ho, C.-K., Davé, N. and Pennings, S.C. 2003. Poster: Strength of plant-herbivore interactions varies across latitude in Atlantic coast salt marshes. 2003 Meeting of the International Biogeographic Society. International Biogeographic Society, January 4-8, 2003, Mesquite, NV. Thoresen, M. and Alber, M. 2003. Poster: Temporal and spatial dynamics of seston in the Duplin River: Implications for oyster food resources. LTER All-Scientists Meeting. September 2003, Seattle, WA. Thoresen, M. and Alber, M. 2003. Presentation: Benthic diatoms in seston and eastern oysters: patterns of spatial and seasonal abundance in a tidal inlet (Duplin River, Georgia, USA). 2003 Estuarine Research Federation meeting. Sept. 14-18, 2003, Seattle, WA. Thoresen, M. and Alber, M. 2003. Presentation: POC concentrations over different scales of variability in a tidal inlet (Duplin River, Georgia). Southeastern Estuarine Research Society meeting. March 2003, Atlantic Beach, NC. Weston, N.B., Porubsky, W.P., Joye, S.B., Samarkin, V. and Erickson, M. 2003. Poster: Porewater Stoichiometry of Terminal Metabolic Products, Sulfate, and Dissolved Organic Carbon and Nitrogen in Estuarine Sediments. Long Term Ecological Research Program All Scientists Meeting. September 2003, Seattle, WA. Franks, S.J., Richards, C.L., Gonzales, E., Cousins, J.E. and Hamrick, J.L. 2002. Presentation: Multi-scale genetic analysis of Uniola paniculata L.: a coastal species with a fragmented, linear distribution. American Society of Naturalists National Meeting. Banff, Canada. Porubsky, W.P., Weston, N.B. and Joye, S.B. 2002. Presentation: Redox control of benthic fluxes of nutrients and dissolved organics from coastal sediments. ASLO Summer Meeting. American Society of Limnology and Oceanography, June, 2002, Victoria, British Columbia. Richards, C.L., Pennings, S.C. and Donovan, L.A. 2002. Poster: Community-wide patterns of phenotypic variation in salt marsh plants. 2002 National Estuarine Research Reserve (NERR) Annual Meeting. Thoresen, M., Alber, M. and Nelson, J.R. 2002. Presentation: Microalgal food resources of oysters: are benthic diatoms important to an estuarine suspension-feeder?. Joint Workshop of the National Estuarine Research Reserve System and National Estuarine Research Reserve Association. October 2002, Falmouth, Mass. Weston, N.B., Porubsky, W.P. and Joye, S.B. 2002. Presentation: Seasonal patterns of porewater nutrients, dissolved organics, redox species and gases in estuarine sediments. ASLO Summer Meeting. American Society of Limnology and Oceanography, June, 2002, Victoria, British Columbia. Alber, M. 2001. Presentation: Understanding freshwater inflow to Georgia estuaries: from science to policy. 2001 Estuarine Research Federation Meeting. Estuarine Research Federation, St. Pete Beach, Florida. Bishop, T.D., Alber, M. and Wiegert, R.G. 2001. Poster: Macrofaunal population shifts and changing coastal salinity regimes. ERF 2001: An Estuarine Odyssey. Estuarine Research Federation, Nov. 4-8, 2001, St. Pete Beach, Florida. Franks, S.J., Jones, F.A., Johnston, J.A., Bouck, A.C., Comita, L.S., Hardesty, B.D., Richards, C.L., Rosenthal, D.R. and West, J.B. 2001. Presentation: What is Molecular Ecology?. Annual meeting for the Society for the Study of Evolution, 2001. Ecological genetics. Society for the Study of Evolution, Knoxville, Tennessee. Goodbody, G., Bishop, T.D. and Alber, M. 2001. Presentation: Distribution of snails in the Satilla and Altamaha River Estuaries. Southeastern Estuarine Research Society Meeting. Southeastern Estuarine Research Society, Mar 01, 2001, Charleston, South Carolina. Joye, S.B., Weston, N.B. and MacAvoy, S.E. 2001. Presentation: Groundwater inputs and sediment biogeochemical processes in Georgia and South Carolina coastal ecosystems. Biannual Meeting of the Estuarine Research Federation. Estuarine Research Federation, November, 2001, St. Petersburg, Florida. Pennings, S.C., Bertness, M.D., Donnelly, J.P., Ewanchuk, P.J., Silliman, B.R. and Callaway, R.M. 2001. Presentation: Impacts of global change on coastal salt marshes. Keynote address to the German Limnological Association, September 17-21, 2001, Kiel, Germany. Richards, C.L. 2001. Presentation: Conservation genetics of three salt marsh perennials. Annual Meeting 2001 Garden Club of America. Garden Club of America, Orlando, Florida. Richards, C.L., White, S.N., Mcguire, M.A., Franks, S.J. and Donovan, L.A. 2001. Presentation: Evidence for local adaptation along a salinity gradient in a salt marsh perennial. ESA 2001. Ecological Society of America, Aug 01, 2001. Thoresen, M., Alber, M. and Nelson, J.R. 2001. Presentation: Microalgal food resources of oysters: are benthic diatoms important to an estuarine suspension-feeder?. ERF 2001: An Estuarine Odyssey. Estuarine Research Federation, Nov. 4-8, 2001, St. Pete Beach, Florida. Richards, C.L., Pennings, S.C. and Donovan, L.A. 2000. Presentation: Morphological variation in twelve salt marsh plant species on Sapelo Island, GA. ESA 2000. Ecological Society of America, Aug 01, 2000. Smith, C.B., Alber, M. and Sheldon, J.E. 2000. Poster: Analysis of historic vegetation changes in two Georgia estuaries using a GIS. Southeastern Estuarine Research Society Meeting. Southeastern Estuarine Research Society, Oct 01, 2000, Tampa, Florida. Thoresen, M. and Alber, M. 2000. Presentation: Tidal dynamics of particulate material in the Duplin River (Sapelo Island National Estuarine Research Reserve): An evaluation of the YSI 6025 chlorophyll probe. The National Estuarine Research Reserve Annual Workshop. National Estuarine Research Reserve, Oct 01, 2000, Williamsburg, Virginia. |
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Data Sets by LTER Core Area and Site Research TopicCore LTER Data SetsAquatic Invertebrate EcologyChemistryFungal ProductivityGeneral Nutrient ChemistryGeologySediment elevation measurements for 10 GCE-LTER sampling sites from December 2001 to December 2020 Soil accretion at 10 GCE marsh sampling sites from December 2001 to May 2011 Soil accretion at 10 GCE marsh sampling sites from December 2011 to December 2016 Geospatial AnalysisAmerican alligator GPS tracking study from May 2008 to September 2010 on Sapelo Island, Georgia Groundwater HydrologyRadon Activities in the Duplin River near Sapelo Island, Georgia Radon Surveys in the Duplin River near Sapelo Island, Georgia from July 2016 Hydrography/HydrologyMulti-Disciplinary StudyPhysical OceanographyMay 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect May 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect May 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect May 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect May 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Intracoastal Waterway transect May 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect March 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect March 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect March 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect March 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect December 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect December 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect December 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect December 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect December 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect September 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect September 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect September 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect September 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect September 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect June 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect June 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect June 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect June 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect June 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect March 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect March 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect March 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect March 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect March 2003 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect December 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect December 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect December 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect December 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect September 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect September 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect September 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect September 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect June 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect June 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect June 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect March 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy River transect March 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect March 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect March 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect November 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect November 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect November 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect November 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect October 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Inner Marsh transect October 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect October 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect October 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect Spring 2001 CTD profiles for the Georgia Coastal Ecosystems Sapelo River transect Spring 2001 CTD profiles for the Georgia Coastal Ecosystems Intracoastal Waterway transect Spring 2001 CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect Spring 2001 CTD profiles for the Georgia Coastal Ecosystems Doboy Sound transect Plant EcologyPlant allometry at GCE sampling sites 1-10 in October between 2002 and 2020. GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2017 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2016 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2015 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2014 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2013 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2012 Population EcologyGCE-LTER Altamaha River Plant Community Monitoring Survey in October 2022 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2021 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2020 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2019 GCE-LTER Altamaha River Plant Community Monitoring Survey in October 2018 Pore-water ChemistrySoil salinity at GCE-LTER vegetation monitoring plots in October 2022 Soil salinity at GCE-LTER vegetation monitoring plots in October 2021 Soil salinity and organic content at GCE-LTER vegetation monitoring plots in October 2020 Soil salinity at GCE-LTER vegetation monitoring plots in October 2016 Soil salinity at GCE-LTER vegetation monitoring plots in October 2017 Soil salinity at GCE-LTER vegetation monitoring plots in October 2018 Soil salinity at GCE-LTER vegetation monitoring plots in October 2019 Soil salinity at GCE-LTER vegetation monitoring plots in October 2015 Soil salinity at GCE-LTER vegetation monitoring plots in October 2013 Soil salinity at GCE-LTER vegetation monitoring plots in October 2014 Soil salinity at GCE-LTER vegetation monitoring plots in October 2012 Soil salinity and organic content at GCE-LTER vegetation monitoring plots in October 2011 Soil salinity and water content at GCE-LTER vegetation monitoring plots in October 2010 Soil salinity and organic content at GCE-LTER vegetation monitoring plots in October 2009 Terrestrial Insect EcologyLong-term mid-marsh grasshopper abundance and species diversity at eight GCE-LTER sampling sites Ancillary Data SetsGCE Data Portal - GCE hydrographic monitoring data and plots |
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Research Project Principal InvestigatorsMerryl Alber, University of Georgia Thomas Dale Bishop, University of Georgia Jackson O. Blanton, Skidaway Institute of Oceanography Christopher B. Craft, Indiana University at Bloomington Daniela Di Iorio, University of Georgia John Griffin, University of Swansea James T. Hollibaugh, University of Georgia Samantha B. Joye, University of Georgia Christof Meile, University of Georgia Steven C. Pennings, University of Houston Christina L. Richards, University of South Florida Carolyn D. Ruppel, United States Geological Survey Brian R. Silliman, Duke University Richard F. Viso, Coastal Carolina University Alicia M. Wilson, University of South Carolina Other Associated PersonnelMarie Adelaide Ferreira, IMAR-Marine Laboratory Merryl Alber, University of Georgia Julie Amft, Skidaway Institute of Oceanography Francisco Andrade, University of Lisbon Christine Angelini, University of Florida Kristen Anstead, University of Georgia Marine Institute Annika Beiersdorf, Christian-Albrechts-Universität zu Kiel Thomas Dale Bishop, University of Georgia Jackson O. Blanton, Skidaway Institute of Oceanography Melissa G. Booth, University of Georgia Marine Institute Tracy L. Buck, University of Georgia Marine Institute Thomas Carefoot, University of British Columbia Alice G. Chalmers, University of Georgia Daniela Di Iorio, University of Georgia Lisa A. Donovan, University of Georgia Matthew Erickson, University of Georgia Margaret Esch, University of Georgia Christine Ewers, Christian-Albrechts University Steven J. Franks, University of Georgia James B. Grace, United States Geological Survey Sasha Greenspan, University of Georgia Marine Institute Hongyu Guo, University of Houston James L. Hamrick, University of Georgia Marc Simon Hensel, University of Florida Ellen Herbert, Ducks Unlimited Christine M. Hladik, Georgia Southern University Chuan-Kai Ho, Texas A&M University Lena Huebner, Christian-Albrechts-Universität zu Kiel Zoe Hughes, Boston University Kimberley S. Hunter, University of Georgia Samantha B. Joye, University of Georgia KiRyong Kang, University of Georgia Ronald T. Kneib, University of Georgia Marine Institute Amy E. Kunza Vargas, University of Houston Alana R. Lynes, University of Houston Justine I. Lyons, University of Georgia Steven E. MacAvoy, University of Georgia Rodney Mauricio, University of Georgia Caroline R. McFarlin, University of Georgia Paul McKay, Naval Research Laboratory Malte Mews, Christian-Albrechts-Universität zu Kiel Clay L. Montague, University of Florida Willard S. Moore, University of South Carolina James C. Nifong, Kansas State University Matthew B. Ogburn, University of Georgia Steven C. Pennings, University of Houston Richard N. Peterson, Coastal Carolina University William P. Porubsky, University of Georgia Gregor Putze, Christian-Albrechts-Universität zu Kiel Christina L. Richards, University of South Florida Tiffany Roberts, University of Georgia Vladimir Samarkin, University of Georgia Daniel F. Saucedo, University of Georgia Marine Institute Franziska Seer, Christian-Albrechts-Universität zu Kiel Jacob Shalack, University of Georgia Marine Institute Joan E. Sheldon, University of Georgia Wade M. Sheldon Jr., University of Georgia Brian R. Silliman, Duke University Carrie Beth Smith, University of Georgia Merrilee Thoresen, University of Georgia Liliana E. Velasquez, University of Georgia Richard F. Viso, Coastal Carolina University Nathaniel B. Weston, University of Georgia Kazimierz Wieski, University of Houston Yurv Zablotski, Christian-Albrechts-Universität zu Kiel Martin Zimmer, Leibniz-Center for Tropical Marine Ecology |
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