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GCE-LTER Data Set Summary

Accession: INV-GCEM-1101a1 Research Theme: Aquatic Invertebrate Ecology (Monitoring)
Contributors: Merryl Alber, Steve Pennings, Jacob Shalack, Nick Scoville, Kristen Anstead, Hongyu Guo, Jennifer Blake-Mahmud
Title: Mollusc population abundance monitoring: Fall 2010 mid-marsh and creekbank infaunal and epifaunal mollusc abundance based on collections from GCE marsh, monitoring sites 1-10
Abstract: This data set is the Fall 2010 estimate of infaunal and epifaunal mollusc abundance at the GCE-LTER marsh sites used for population monitoring. Species abundance was determined by hand-collecting all the infaunal and epifaunal molluscs from within quadrats of known area in mid-marsh and creekbank zones (n = 4 quadrats per zone) at all sites. The molluscs were returned to the lab, fixed in ethanol, transferred to and preserved in ethanol, counted and measured (size data is reported separately). The counts were converted to number per square meter. Gastropod species are listed first, followed by bivalve species. Size distribution data for these collections may be found in the GCE-LTER data set INV-GCEM-1101a2.
DOI: 10.6073/pasta/a2279d096ed0409aeaf37c92188e334c
Key Words: abundance, Aquatic Invertebrate Monitoring, community composition, creek bank, density, Detracia, epifauna, fall, Geukensia, Hydrobiidae, Ilyanassa, infauna, intertidal, Littoraria, Littorina, marshes, Melampus, mid-marsh, mollusks, monitoring, permanent plots, Polymesoda, species diversity, Succineidae
LTER Core Area: Population Studies
Research Themes: Q2 - Domain Patterns, GCE3 Area2 - Patterns within the Domain, Aquatic Invertebrate Ecology
Study Period: 18-Oct-2010 to 21-Oct-2010
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
» Download Geographic Coverage: Google Earth, ESRI Shapefile (polygons, points)
Species References: Detracia floridana, Geukensia demissa, Hydrobiidae, Ilyanassa obsoleta, Littoraria irrorata, Melampus bidentatus, Polymesoda caroliniana, Succineidae
Data References: INV-GCEM-1101a2 (corresponding mollusc size data set)
Project References: Invasive species, Marine invertebrate monitoring
Downloads: Information

Data Table: INV-GCEM-1101a1 (Main data table for data set INV-GCEM-1101a1, 672 records)

Access: Public (released 31-Jan-2012)

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

Data Formats: Spreadsheet (CSV) [69.61kb],  Text File [57.05kb],  Text Report [177.27kb],  MATLAB (GCE Toolbox) [1033.49kb],  MATLAB (Variables) [639.91kb]

Column List:(hide)

Column Name Units Type Description
1 Year YYYY integer Calendar year of observation
2 Month M integer Calendar month of observation
3 Day D integer Calendar day of observation
4 Site None integer GCE-LTER sampling site number
5 Zone None integer Marsh zone code (1=Creekbank, 2=Mid-marsh)
6 Plot None integer GCE-LTER permanent plot number
7 Location none string Geographic location code in the GCE Metadata Database for the sampling plot
8 Flag_Location none string QA/QC flags for Geographic location code in the GCE Metadata Database for the sampling plot (flagging criteria, where "x" is Location: manual)
9 Location_Notes none string Notes on location assignments and geographic accuracy
10 Longitude degrees floating-point Geographic longitude in decimal degrees
11 Flag_Longitude none string QA/QC flags for Geographic longitude in decimal degrees (flagging criteria, where "x" is Longitude: x<-180="I", x>180="I", manual)
12 Latitude degrees floating-point Geographic latitude in decimal degrees
13 Flag_Latitude none string QA/QC flags for Geographic latitude in decimal degrees (flagging criteria, where "x" is Latitude: x<-90="I", x>90="I", manual)
14 Species None string Latinized name of the mollusc species collected
15 Mollusc_Count Count integer Number of individuals collected in the specified quadrat
16 Flag_Mollusc_Count none string QA/QC flags for Number of individuals collected in the specified quadrat (flagging criteria, where "x" is Mollusc_Count: x<0="I", x>350="Q")
17 Quadrat_Area m^2 floating-point Number of square meters in the quadrat sampled
18 Flag_Quadrat_Area none string QA/QC flags for Number of square meters in the quadrat sampled (flagging criteria, where "x" is Quadrat_Area: x<0.0625="I", x<0.25="Q", x>0.5="Q")
19 Mollusc_Density Count/m^2 floating-point Calculated number of individuals per meter squared
20 Flag_Mollusc_Density none string QA/QC flags for Calculated number of individuals per meter squared (flagging criteria, where "x" is Mollusc_Density: x<0="I", x>700="Q")
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Alber, Merryl. 2011. Mollusc population abundance monitoring: Fall 2010 mid-marsh and creekbank infaunal and epifaunal mollusc abundance based on collections from GCE marsh, monitoring sites 1-10. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/a2279d096ed0409aeaf37c92188e334c

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This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959 and OCE-1237140. 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.