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Accession: MLT-GCET-1106b Research Theme: Multi-Disciplinary Study (Graduate Thesis Study)
Contributors: Brittany DeLoach McCall, Steve Pennings, Huy Vu, Kazik Wieski, Hongyu Guo, Michael Richardson, Brittany DeLong, Claudia Grimm, Annika Stark
Title: Experimental plots studies comparing the impact of fertilization and wrack addition on invertebrate abundance and plant cover in Atlantic and Gulf of Mexico salt marshes from April 2009 to September 2010
Abstract: Understanding the relative strengths of top-down and bottom-up forces is an important key to predicting the structure of biological communities. The strength of these effects can be regulated in part by predator abundance and nutrient availability. In 2009, we hypothesized that the importance of these factors varies geographically between the southeastern Atlantic Coast and the Gulf Coast due to differences in tidal regime, and began to study this variation using a biogeographic, manipulative field experiment. Although our original purpose was to understand the structure of salt marsh arthropod food webs, BP's Deepwater Horizon spill in the Gulf Coast presented an opportunity to understand how stress from an oil spill might affect the variables that we were measuring. The fact that we had plots and transect sampling in place at multiple sites along the Gulf and East Coasts put us in a position to evaluate any impacts that might occur if oil hit some of the sites. The study was conducted at 11 sites across the Gulf Coast, from Texas to Florida, and 11 sites along the Atlantic Coast, from Florida to Maine. At each site, experimental plots were sampled and a 100m transect was sampled near the plots within 5m of the high marsh boundary. Sampling was conducted in May 2009, August 2009, and August 2010. In 2010, four extra sites were added to the existing experimental sites because of known oil contamination, and another site was added as an extra control. Only the transect sampling was conducted at these sites. This dataset contains all the data from experimental plots; experimental treatments of fertilizer addition, wrack addition, fertilizer & wrack addition, and no addition (control) were randomly applied to the plots. The plot treatments were maintained in August 2009 and May 2010.
DOI: 10.6073/pasta/6e33b914618a9d5d112fb70a8ff230b1
Key Words: abundance, Acridid, arthropods, Cecidomyiidae, Chaetopsis, Chloropidae, Delphacodes, Dolichopodidae, ecosystems, Foraminifera, Geukensia, insects, invertebrates, irradiance, Ischnodemus, latitude, Littoraria, longitude, marine, Megamealus, Melampus, nematodes, Oligochaetes, plants, Polychaetes, Prokelisia, Tettigoniid, Trigonotylus, Tytthus
LTER Core Area: Disturbance Patterns
Research Themes: Multi-Disciplinary Study, Aquatic Invertebrate Ecology, Plant Ecology, Population Ecology, Terrestrial Insect Ecology
Study Period: 25-Apr-2009 to 15-Sep-2010
Study Sites:
SE_Coast -- Southeastern USA Coast, USA
» Download Geographic Coverage: Google Earth
Species References: Delphacodes penedetecta, Geukensia demissa, Littoraria irrorata, Melampus bidentatus, Prokelisia marginata, Spartina alterniflora, Trigonotylus uhleri, Tytthus vagus
Data References: MLT-GCET-1106a (Corresponding transect survey data set)

McCall, B.D. 2011. Geographic Variation in the Structure of Salt Marsh Arthropod Communities. M.S. Thesis. University of Houston, Houston, Texas. 51 pages.

Downloads: Information

Data Table: MLT-GCET-1106b (Main data table for data set MLT-GCET-1106b, 176 records)

Access: Public (released 01-Jan-2012)

Metadata: Text (ESA FLED), XML (Ecological Metadata Language)

Data Formats: Spreadsheet (CSV) [28.02kb],  Text File [31.72kb],  MATLAB (GCE Toolbox) [280.27kb],  MATLAB (Variables) [283.16kb],  Text Report [103.80kb]

Column List:(hide)

Column Name Units Type Description
1 Location none string Name of the sampling location
2 Latitude degrees floating-point Geographic latitude of the sampling location
3 Longitude degrees floating-point Geographic longitude of the sampling location
4 Day D integer Calendar day site was sampled
5 Month M integer Calendar month site was sampled
6 Year YYYY integer Calendar year site was sampled
7 Treatment none integer Treatment applied to the plot
8 Spartina_Cover percent floating-point percent cover of Spartina in 0.5 x 0.5 m quadrat
9 Dead_Plant_Cover percent floating-point percent cover of dead plant material in 0.5 x 0.5 m quadrat
10 Spartina_Height cm floating-point Height of tallest Spartina alterniflora plant
11 PAR_Above_Canopy µE/m^2/s floating-point PAR reading above plant canopy
12 PAR_Below_Canopy µE/m^2/s floating-point PAR reading at soil level
13 Light_Intercepted ratio floating-point Fraction of light intercepted by the canopy
14 Trigonotylus_​uhleri_​Count_​DVac count integer Number of Trigonotylus uhleri in pooled DVac sample
15 Leafhopper_Count_DVac count integer Number of leafhoppers in pooled DVac sample
16 Prokelisia_Count_DVac count integer Number of Prokelisia in pooled DVac sample
17 Delphacodes_​penedetecta_​Count_​DVac count integer Number of Delphacodes penedetecta in pooled DVac sample
18 Megamealus_Count_DVac count integer Number of Megamealus in pooled DVac sample
19 Immature_​Delphacids_​Count_​DVac count integer Number of immature Delphacids in pooled DVac sample
20 Other_​Planthopper_​Count_​DVac count integer Number of other Planthoppers in pooled DVac sample
21 Ischnodemus_Count_DVac count integer Number of Ischnodemus in pooled DVac sample
22 Tettigonid_Count_DVac count integer Number of Tettigonid in pooled DVac sample
23 Acridid_Count_DVac count integer Number of Acridid in pooled DVac sample
24 Thrips_Count_DVac count integer Number of Thrips in pooled DVac sample
25 Weevil_Count_DVac count integer Number of weevils in pooled DVac sample
26 Chaetopsis_Fly_Count_DVac count integer Number of Chaetopsis fly in pooled DVac sample
27 Chloropidae_Count_DVac count integer Number of Chloropidae in pooled DVac sample
28 Cecidomyiidae_Count_DVac count integer Number of Cecidomyiidae in pooled DVac sample
29 Dolichopodidae_Count_DVac count integer Number of Dolichopodidae in pooled DVac sample
30 Other_​Herbivore_​Count_​DVac count integer Number of other herbivores in pooled DVac sample
31 Tythus_vagus_Count_DVac count integer Number of Tythus vagus in pooled DVac sample
32 Naemia_Count_DVac count integer Number of Naemia in pooled DVac sample
33 Hogna_Count_DVac count integer Number of Hogna in pooled DVac sample
34 Pardosa_Count_DVac count integer Number of Pardosa in pooled DVac sample
35 Marpissa_Count_DVac count integer Number of Marpissa in pooled DVac sample
36 Other_Salticid_Count_DVac count integer Number of other Salticid in pooled DVac sample
37 Clubionid_Count_DVac count integer Number of Clubionid in pooled DVac sample
38 Tetragnatha_Count_DVac count integer Number of Tetragnatha in pooled DVac sample
39 Grammonota_Count_DVac count integer Number of Grammonota in pooled DVac sample
40 Other_Spider_Count_DVac count integer Number of other spiders in pooled DVac sample
41 Other_Predator_Count_DVac count integer Number of other predators in pooled DVac sample
42 Wasp_Count_DVac count integer Number of wasps in pooled DVac sample
43 Collembola_Count_DVac count integer Number of Collembola in pooled DVac sample
44 Brachycera_Count_DVac count integer Number of Brachycera in pooled DVac sample
45 Nematocera_Count_DVac count integer Number of Nematocera in pooled DVac sample
46 Ant_Count_DVac count integer Number of ants in pooled DVac sample
47 Dragonfly_Count_DVac count integer Number of dragonflies in pooled DVac sample
48 Cricket_Count_DVac count integer Number of crickets in pooled DVac sample
49 Amphipod_Count_DVac count integer Number of Amphipods in pooled DVac sample
50 Coleoptera_Count_DVac count integer Number of Coleoptera in pooled DVac sample
51 Crab_Count_DVac count integer Number of crabs in pooled DVac sample
52 Mite_Count_DVac count integer Number of mites in pooled DVac sample
53 Total_​Arthropod_​Count_​DVac count integer Total arthropods in pooled DVac sample
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: McCall, Brittany DeLoach. 2011. Experimental plots studies comparing the impact of fertilization and wrack addition on invertebrate abundance and plant cover in Atlantic and Gulf of Mexico salt marshes from April 2009 to September 2010. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/6e33b914618a9d5d112fb70a8ff230b1

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This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959, OCE-1237140 and OCE-1832178. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.