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GCE-LTER Data Set Summary

Accession: INV-GCES-2105a Research Theme: Aquatic Invertebrate Ecology (Synthesis)
Contributors: Christine Angelini, Steve Pennings, Adam Sapp
Title: Long-term adult and juvenile periwinkle snail (Littoraria irrorata) density in mid-marsh and creekbank plots from the Georgia Coastal Ecosystems LTER Fall Monitoring Program
Abstract: This data set includes long-term observation of the abundance of periwinkle snail (Littoraria irrorata) at sampling sites within the Georgia Coastal Ecosystem (GCE) LTER study area. Visual counts of adult Littoraria were conducted within 0.5m x 0.5m quadrats in-line with permanent GCE vegetation plots. Juvenile Littoraria (1-4mm shell length) were found and counted by looking inside all leaf furls within a nested quadrat (0.25m x 0.25m). In each marsh zone at each GCE LTER permanent monitoring site, we counted the number of adult and juvenile snails in 8 creekbank and 12 mid-marsh replicate quadrats. This method was started in 2012 as a new part of the annual GCE monitoring and supplements the invertebrate data that has been collected since October 2000. This data set includes observations from 2012 to 2022 and will be updated annually to include the prior year observations.
DOI: 10.6073/pasta/fbc06e1d9b4223b97117cdac28e4ed03
Key Words: Animalia, Aquatic Invertebrate Monitoring, Bilateria, distribution, Gastropoda, GCE, Georgia, Georgia Coastal Ecosystems, invertebrates, Littoraria, littoraria irrorata, Littorinidae, Lophozoa, LTER, marshes, Mollusca, mollusks, Neotaenioglossa, periwinkle, population dynamics, Protostomia, recruitment, Sapelo Island, snails, USA
LTER Core Area: Population Studies
Research Themes: GCE2 Q2 - Domain Patterns, GCE2 Q5 - Organism Distribution, GCE3 Area2 - Patterns within the Domain, Aquatic Invertebrate Ecology
Study Period: 07-Oct-2012 to 21-Oct-2022
Study Sites:
GCE1 -- Eulonia, Georgia, USA
GCE2 -- Four Mile Island, Georgia, USA
GCE3 -- North Sapelo, Sapelo Island, Georgia, USA
GCE4 -- Meridian, Georgia, USA
GCE5 -- Folly River, Georgia, USA
GCE6 -- Dean Creek, Sapelo Island, Georgia, USA
GCE7 -- Carrs Island, Georgia, USA
GCE8 -- Alligator Creek, Georgia, USA
GCE9 -- Rockdedundy Island, Georgia, USA
GCE10 -- Hunt Camp, Sapelo Island, Georgia, USA
ZSC2 -- ZSC2 Altamaha Plant Transition Site, Georgia, USA
» Download Geographic Coverage: Google Earth
Species References: Littoraria irrorata
Data References: INV-GCEM-1211 (Fall 2012 survey), INV-GCEM-1404a (Fall 2013 survey), INV-GCEM-1504a (Fall 2014 survey), INV-GCEM-1604a (Fall 2015 survey), INV-GCEM-1704a (Fall 2016 survey), INV-GCEM-1804a (Fall 2017 survey), INV-GCEM-1904a (Fall 2018 survey), INV-GCEM-2004a (Fall 2019 survey), INV-GCEM-2104a (Fall 2020 survey), INV-GCEM-2204a (Fall 2021 survey), INV-GCEM-2304a (Fall 2022 survey)
Project References: Marine invertebrate monitoring, Snail and bivalve recruitment
Downloads: Information

Data Table: INV-GCES-2105a (Main data table for data set INV-GCES-2105a, 4192 records)

Access: Public (released 11-May-2021)

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

Data Formats: Spreadsheet (CSV) [190.90kb],  Text File [165.86kb],  MATLAB (GCE Toolbox) [67.24kb],  MATLAB (Variables) [90.89kb],  Text Report [277.68kb]

Column List:(hide)

Column Name Units Type Description
1 Year YYYY integer Calendar year of observation
2 Month MM integer Calendar month of observation
3 Day DD integer Calendar day of observation
4 Site none string GCE-LTER sampling site number
5 Zone none integer Creekbank or Mid-marsh
6 Plot none integer Plot replicate number that corresponds to GCE LTER plots as poles were placed to adjacent (<1m) to GCE plots
7 Observation_Type none string Observation method (adult count or juvenile count)
8 Abundance count integer Number of Littoraria counted in the plot area
9 Quadrat_Area m^2 floating-point Area of sampling quadrat
10 Density count/m^2 floating-point Number of Littoraria per square meter
11 Notes none string Notes from field data sheets
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Angelini, Christine. 2021. Long-term adult and juvenile periwinkle snail (Littoraria irrorata) density in mid-marsh and creekbank plots from the Georgia Coastal Ecosystems LTER Fall Monitoring Program. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/fbc06e1d9b4223b97117cdac28e4ed03

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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.