GCE-LTER Project News
New or Updated Publications04/25/2025 –
Jiang, R., Liu, W. and Pennings, S.C. (in press). Global warming disrupts the relative allocation between sexual and clonal reproduction in a common salt marsh plant. (DOI: https://doi.org/10.1002/ecy.70101) 04/24/2025 –
Lugar, K. and Pennings, S.C. (in press). Effects of large mammal herbivory on salt marsh invertebrate communities vary with grazing type. Estuaries and Coasts. Latest Data Releases08/26/2024 – Data Release
Data sets PLT-GCEM-2012 "Long-term monitoring of seven high marsh plant mixtures on Sapelo Island GA" and PLT-GCEM-1309 "Annual monitoring of high marsh plots dominated by Juncus and Borrichia" have been updated to include recent data. 07/29/2024 – Data Release
Data set titled 'Percent cover measurements of four site-dominant species from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) Project' was added to the GCE data catalog. You can view the data here: PLT-GCED-2404. Abstract: SALTEx (Seawater Addition Long-Term Experiment) is a field experiment designed to simulate saltwater intrusion in a tidal freshwater wetland to predict how chronic (Press) and acute (Pulse) salinization will affect this and other tidal freshwater ecosystems. The SALTEx experiment was initiated in 2012 and consists of 31 field plots, each 2.5 m on a side. There are three treatments (Press, Pulse, and Fresh) and two types of controls (with and without sides), each consisting of six replicates. The Press treatment plots receive regular (4 times each week) additions of a mixture of seawater and fresh river water. Pulse plots receive the same mixture of seawater and river water during September and October, which is historically a time of low flow in the river when natural saltwater intrusion occurs. The Fresh treatment plots receive regular additions of fresh river water. Treatment water is added during low tide to facilitate its infiltration into the soil, and all plots are inundated by astronomical tides at high tide. Percent cover was measured for four site-dominant species (Zizaniopsis miliacea, Pontederia cordata, Persicaria hydropiperoides, and Ludwigia repens) each July from 2013 to 2022. Citation: Craft, Christopher B. 2024. Percent cover measurements of four site-dominant species from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) Project. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/554fbb232ea0ae95144f0857a604e73c 07/29/2024 – Data Release
Data set titled 'Photosynthetic available radiation (PAR) measurements from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) Project' was added to the GCE data catalog. You can view the data here: PLT-GCED-2404a. Abstract: SALTEx (Seawater Addition Long-Term Experiment) is a field experiment designed to simulate saltwater intrusion in a tidal freshwater wetland to predict how chronic (Press) and acute (Pulse) salinization will affect this and other tidal freshwater ecosystems. The SALTEx experiment was initiated in 2012 and consists of 31 field plots, each 2.5 m on a side. There are three treatments (Press, Pulse, and Fresh) and two types of controls (with and without sides), each consisting of six replicates. The Press treatment plots receive regular (4 times each week) additions of a mixture of seawater and fresh river water. Pulse plots receive the same mixture of seawater and river water during September and October, which is historically a time of low flow in the river when natural saltwater intrusion occurs. The Fresh treatment plots receive regular additions of fresh river water. Treatment water is added during low tide to facilitate its infiltration into the soil, and all plots are inundated by astronomical tides at high tide. Light availability was measured using photosynthetically active radiation (PAR) both above and below the plant canopy. Citation: Craft, Christopher B. 2024. Photosynthetic available radiation (PAR) measurements from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) Project. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/1e78ffbb1d1419fcc50cb1892f3c3191 Latest File Uploads04/25/2025 – Presentation 04/03/2025 – Document 03/13/2025 – Spreadsheet (GCE only) 02/04/2025 – Spreadsheet |
GCE Project Announcements04/25/2025 – Seminar
GCE held the 2025 summer orientation meeting on April 25, 2025. This meeting was targeted towards summer interns and first time visitors to the island, but would also serve as a reminder to those who have been before. Recording of the meeting can be found at https://gce-lter.marsci.uga.edu/public/app/resource_details.asp?id=1062 (contact Adam Sapp for additional information)04/25/2025 – Field Program News
GCE stickers are now available. An impressive five by five inches, these stickers will allow you to proudly represent the GCE wherever you go. You'll want several for your water bottle, laptop, vehicle, etc. Available from the field crew for a modest donation to cover costs (no grant funds were spent on this).  GCE sticker, five by five inches, get yours now! 03/17/2025 – Field Program News
The GCE skiff has recently been fitted with a new Yamaha F150XC outboard, which is expected to provide us with years of reliable access to shallow-water sites.  (contact John Williams for additional information) 03/11/2025 – Research News
In advance of the first major field effort of GCE V, Amanda Spivak led a team looking for sites in the GCE domain over the March 8 weekend. The field work planned for this summer will test the hypothesis that spatial variability increases approaching a habitat transition, and will also set up long-term monitoring sites in upland forest plots. Thanks to John and Emily for working over the weekend to assist us. Georgianne Moore explained forests to the marsh scientists, and Alicia Wilson helped us think about groundwater. (contact Steve Pennings for additional information)03/10/2025 – Education News
Schoolyard teacher Jessica Cook was awarded the Georgia Association for Gifted Children 2025 Gifted Program Teacher of the Year this month. (contact Steve Pennings for additional information)03/02/2025 – Employment
How does the inherent variability of coastal environments affect processes underpinning wetland ecosystem functioning? The Spivak Coastal Biogeochemistry Lab seeks a Postdoctoral Researcher to investigate how fluctuating abiotic gradients affect coupled ecological and biogeochemical processes in coastal wetlands. More specifically, how do ecosystem processes change across abiotic gradients and does variability increase near habitat transitions. The Researcher will lead field experiments in the Georgia Coastal Ecosystems Long-Term Ecological Research (GCE-LTER) domain and collaborate with a multi-disciplinary team of population, community, and microbial ecologists and hydrologists, among others. Complementary lab experiments will be used to understand fine-scale mechanisms controlling carbon cycling and fate. (contact Amanda Spivak for additional information)» Add Announcement or Update Announcement (GCE only) » Subscribe to the GCENEWS-L Email List (weekly GCE newsletter) » View/Search Recent GCE Announcements |
