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GCE-LTER Data Set Summary

Accession: INV-GCES-0706a Research Theme: Aquatic Invertebrate Ecology (Directed Study)
Contributors: Merryl Alber, Alana Lynes, Jonathan Pahlas
Title: Summer 2007 crab population survey based on crab hole counts in fifty-four GCE LTER Hammock sites and four GCE LTER study sites
Abstract: Crab abundance was investigated at fifty-four hammock sampling sites and four Georgia Coastal Ecosystems (GCE) LTER study sites in June-July 2007 by counting crab holes as a proxy measurement. Each hammock site had six permanent study plots which were previously laid out. Crab holes were counted within a random location inside those six plots at each hammock. Crab holes were counted within a 625 cm^2 area and species were not differentiated in the count, but noted. This method estimates total crab abundance in each study site.
DOI: 10.6073/pasta/fef37c19e09df727eef979115e4977f1
Key Words: Armases, crabs, density, Eurytium, hammock, Hammock Surveys, monitoring, population dynamics, Sesarma, summer, Uca
LTER Core Area: Populations
Research Themes: Q4 - Lateral Gradients, GCE3 Area3 - Responses to Salinity and Inundation, Aquatic Invertebrate Ecology
Study Period: 05-Jun-2007 to 30-Jul-2007
Study Sites:
GCE1 -- Eulonia, Georgia, USA
GCE3 -- North Sapelo, Sapelo Island, Georgia, USA
GCE4 -- Meridian, Georgia, USA
GCE9 -- Rockdedundy Island, Georgia, USA
BC_i_3 -- Hammock BC_i_3, Sapelo Island, Georgia, USA
BC_i_5 -- Hammock BC_i_5, Sapelo Island, Georgia, USA
BC_i_6 -- Hammock BC_i_6, Sapelo Island, Georgia, USA
BC_ii_1 -- Hammock BC_ii_1, Sapelo Island, Georgia, USA
BC_ii_2 -- Hammock BC_ii_2, Sapelo Island, Georgia, USA
BN_i_10 -- Hammock BN_i_10, Sapelo Island, Georgia, USA
BN_i_8 -- Hammock BN_i_8, Sapelo Island, Georgia, USA
BN_i_9 -- Hammock BN_i_9, Sapelo Island, Georgia, USA
DS_i_10 -- Hammock DS_i_10, Sapelo Island, Georgia, USA
DS_i_11 -- Hammock DS_i_11, Sapelo Island, Georgia, USA
DS_i_13 -- Hammock DS_i_13, Sapelo Island, Georgia, USA
DS_i_14 -- Hammock DS_i_14, Sapelo Island, Georgia, USA
DS_i_16 -- Hammock DS_i_16, Sapelo Island, Georgia, USA
DS_i_17 -- Hammock DS_i_17, Sapelo Island, Georgia, USA
DS_ii_5 -- Hammock DS_ii_5, Sapelo Island, Georgia, USA
HN_i_1 -- Hammock HN_i_1, Sapelo Island, Georgia, USA
HN_i_2 -- Hammock HN_i_2, Sapelo Island, Georgia, USA
HN_i_3 -- Hammock HN_i_3, Sapelo Island, Georgia, USA
HN_ii_4 -- Hammock HN_ii_4, Sapelo Island, Georgia, USA
HN_ii_5 -- Hammock HN_ii_5, Sapelo Island, Georgia, USA
HN_iv_6 -- Hammock HN_iv_6, Sapelo Island, Georgia, USA
HS_i_10 -- Hammock HS_i_10, Sapelo Island, Georgia, USA
HS_i_11 -- Hammock HS_i_11, Sapelo Island, Georgia, USA
HS_i_7 -- Hammock HS_i_7, Sapelo Island, Georgia, USA
HS_i_8 -- Hammock HS_i_8, Sapelo Island, Georgia, USA
HS_i_9 -- Hammock HS_i_9, Sapelo Island, Georgia, USA
HS_ii_14 -- Hammock HS_ii_14, Sapelo Island, Georgia, USA
HS_ii_15 -- Hammock HS_ii_15, Sapelo Island, Georgia, USA
HS_ii_27 -- Hammock HS_ii_27, Sapelo Island, Georgia, USA
HS_iii_17 -- Hammock HS_iii_17, Sapelo Island, Georgia, USA
HS_iii_19 -- Hammock HS_iii_19, Sapelo Island, Georgia, USA
HS_iii_20 -- Hammock HS_iii_20, Sapelo Island, Georgia, USA
HS_v_21 -- Hammock HS_v_21, Sapelo Island, Georgia, USA
PC_i_24 -- Hammock PC_i_24, Sapelo Island, Georgia, USA
PC_iii_7 -- Hammock PC_iii_7, Sapelo Island, Georgia, USA
PN_i_10 -- Hammock PN_i_10, Sapelo Island, Georgia, USA
PN_i_11 -- Hammock PN_i_11, Sapelo Island, Georgia, USA
PN_i_12 -- Hammock PN_i_12, Sapelo Island, Georgia, USA
PN_i_13 -- Hammock PN_i_13, Sapelo Island, Georgia, USA
PN_i_14 -- Hammock PN_i_14, Sapelo Island, Georgia, USA
PN_i_26 -- Hammock PN_i_26, Sapelo Island, Georgia, USA
PN_ii_15 -- Hammock PN_ii_15, Sapelo Island, Georgia, USA
PN_ii_16 -- Hammock PN_ii_16, Sapelo Island, Georgia, USA
PN_ii_17 -- Hammock PN_ii_17, Sapelo Island, Georgia, USA
PN_ii_18 -- Hammock PN_ii_18, Sapelo Island, Georgia, USA
PN_ii_19 -- Hammock PN_ii_19, Sapelo Island, Georgia, USA
PN_iii_20 -- Hammock PN_iii_20, Sapelo Island, Georgia, USA
PN_iii_28 -- Hammock PN_iii_28, Sapelo Island, Georgia, USA
PN_iv_21 -- Hammock PN_iv_21, Sapelo Island, Georgia, USA
PN_iv_22 -- Hammock PN_iv_22, Sapelo Island, Georgia, USA
PN_v_23 -- Hammock PN_v_23, Sapelo Island, Georgia, USA
PN_vii_25 -- Hammock PN_vii_25, Sapelo Island, Georgia, USA
» Download Geographic Coverage: Google Earth, ESRI Shapefile (polygons)
Species References: Armases cinereum, Eurytium limosum, Uca minax, Uca pugilator, Uca pugnax
Project References: Intensive hammock characterization
Downloads: Information

Data Table: INV-GCES-0706a (Main data table for data set INV-GCES-0706a, 348 records)

Access: Public (released 01-Aug-2008)

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

Data Files: Spreadsheet (CSV) [37.79kb],  Text File [35.80kb],  Text Report [77.67kb],  MATLAB (GCE Toolbox) [350.51kb],  MATLAB (Variables) [336.71kb]

Column List:(hide)

Column Name Units Type Description
1 Date MM/DD/YYYY string Calendar date of sampling
2 Site None string GCE-LTER hammock number or GCE site
3 Site_Origin None integer Origin of hammock or GCE site
4 Site_Region None integer Region of study area where the hammock or GCE site occur
5 Site_Size Hectares floating-point Measured area of hammock or GCE site
6 Site_Identifier None integer Number that identifies hammock or GCE site
7 Plot none integer Permanent plot number
8 UTM_Zone none integer UTM zone of sampling plot
9 UTM_Northing m floating-point UTM northing of the sampling plot (WGS84 datum)
10 UTM_Easting m floating-point UTM easting of the sampling plot (WGS84 datum)
11 Latitude degrees floating-point Geographic latitude in decimal degrees
12 Longitude degrees floating-point Geographic longitude in decimal degrees
13 Quadrat_Area cm^2 floating-point Areal measurement of the quadrat frame
14 Hole_Count Count integer Number of crab holes recorded in 625 cm^2 quadrat
15 Hole_Density Count/m^2 floating-point Calculated number of crab holes per meter squared
16 Crab_Species_Noted none string Noted crab species within the Transect
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Alber, Merryl. 2007. Summer 2007 crab population survey based on crab hole counts in fifty-four GCE LTER Hammock sites and four GCE LTER study sites. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/fef37c19e09df727eef979115e4977f1

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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.