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GCE-LTER Data Set Summary

Accession: INV-GCEM-0412b2 Research Theme: Aquatic Invertebrate Ecology (Monitoring)
Contributors: Thomas Dale Bishop, Merryl Alber, Ken Helm, Monica Palta, Gayle Albers, Laurel Berger-Bishop, Dean Hardy
Title: Mollusc population size distribution monitoring: Fall 2002 mid-marsh and creekbank infaunal and epifaunal mollusc size distributions based on collections from GCE marsh, monitoring sites 1-10
Abstract: This data set is the Fall 2002 report of infaunal and epifaunal mollusc species' size distributions at the GCE-LTER marsh sites used for population monitoring. Infaunal and epifaunal molluscs were hand-collected from within quadrats of known area from mid-marsh and creekbank zones (n = 4 quadrats per zone) at all sites. The molluscs were returned to the lab, fixed in formalin, transferred to and preserved in ethanol, measured and counted (count data is reported separately). Length of each measurable individual was determined using calipers or small etched rulers under a stereomicroscope. Species abundance and density data for these collections may be found in the GCE-LTER data set INV-GCEM-0412b1. Numbers of individuals of each species in the abundance data file may not correspond exactly to the numbers of individuals in the size data file because some individuals may not have been measureable.
DOI: 10.6073/pasta/a314b4308619631139e000effc714f78
Key Words: Aquatic Invertebrate Monitoring, Assiminea, community composition, creek bank, Detracia, epifauna, fall, Geukensia, Hydrobiidae, Ilyanassa, infauna, intertidal, length, Littoraria, Littorina, marshes, Melampus, mid-marsh, mollusks, monitoring, permanent plots, Polymesoda, size distribution, species diversity, Succineidae
LTER Core Area: Population Studies
Research Themes: Q2 - Domain Patterns, GCE3 Area2 - Patterns within the Domain, Aquatic Invertebrate Ecology
Study Period: 14-Oct-2002 to 20-Oct-2002
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: Assiminea succinea, Detracia floridana, Geukensia demissa, Hydrobiidae, Ilyanassa obsoleta, Littoraria irrorata, Melampus bidentatus, Polymesoda caroliniana, Succineidae
Data References: INV-GCEM-0412b1 (Corresponding abundance survey data)
Project References: Invasive species, Marine invertebrate monitoring
Downloads: Information

Data Table: INV-GCEM-0412b2 (Main data table for data set INV-GCEM-0412b2, 2770 records)

Access: Public (released 31-Dec-2005)

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

Data Formats: Spreadsheet (CSV) [250.33kb],  Text File [215.35kb],  Text Report [320.08kb],  MATLAB (GCE Toolbox) [1263.05kb],  MATLAB (Variables) [1039.21kb]

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_Length mm floating-point Length of measurable individuals collected from each plot
16 Flag_Mollusc_Length none string QA/QC flags for Length of measurable individuals collected from each plot (flagging criteria, where "x" is Mollusc_Length: x<0="I", x<1="Q", x>113.5="Q")
17 Condition None integer Binary code to indicate shell condition of the individual specimen.
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Bishop, Thomas Dale. 2004. Mollusc population size distribution monitoring: Fall 2002 mid-marsh and creekbank infaunal and epifaunal mollusc size distributions 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/a314b4308619631139e000effc714f78

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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.