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GCE-LTER Data Set Summary
Accession:
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INV-GCEM-1909
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Research Theme:
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Aquatic Invertebrate Ecology (Monitoring)
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Contributors:
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Steven C. Pennings, Merryl Alber, Jacob Shalack, Dontrece Smith, Sam Ladewig, Andy Penniman
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Title:
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Fall 2018 crab population monitoring: mid-marsh and creek bank abundance based on crab hole counts at GCE marsh, monitoring sites 1-10
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Abstract:
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This data set is the Fall 2018 estimate of crab densities at the GCE-LTER marsh sites used for population monitoring. Crab abundance was determined by counting the number of crab holes within a 625 cm^2 quadrat and converting the counts to number per square meter. Counts were made in the mid-marsh and creek bank zones (n = 4 per zone) at GCE sites 1 through 10. Note that this census method does not differentiate which species made a particular hole and therefore only estimates total burrowing crab abundance, potentially including species Uca pugnax, Uca minax, Uca pugilator, Armases cinereum, Eurytium limosum and Sesarma reticulatum. Crab holes that are not actively maintained are quickly covered by tidal activity and other sediment disturbances, therefore plugged holes were assumed to be unoccupied and excluded from the counts.
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DOI:
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10.6073/pasta/2618c32427f72a0ec183f805486cd516
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Key Words:
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Animalia, Aquatic Invertebrate Monitoring, Armases, Armases cinereum, Arthropoda, Bilateria, Brachyura, crabs, creek bank, Crustacea, Decapoda, density, Ecdysozoa, Eucarida, Eumalacostraca, Eurytium, Eurytium limosum, fall, GCE, Georgia, Georgia Coastal Ecosystems, Grapsoidea, intertidal, LTER, Malacostraca, marshes, mid-marsh, monitoring, mud, Ocypodidae, Ocypodoidea, Panopeidae, permanent plots, Pleocyemata, population dynamics, Protostomia, Sapelo Island, Sesarma, Sesarma reticulatum, Sesarmidae, Uca, Uca minax, Uca pugilator, Uca pugnax, USA, Xanthoidea
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LTER Core Area:
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Population Studies
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Research Themes:
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GCE2 Q2 - Domain Patterns, GCE3 Area2 - Patterns within the Domain, Aquatic Invertebrate Ecology |
Study Period:
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12-Oct-2018 to 23-Oct-2018
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Study Sites:
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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
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Species References:
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Armases cinereum,
Eurytium limosum,
Sesarma reticulatum,
Uca minax,
Uca pugilator,
Uca pugnax |
Project References:
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Marine invertebrate monitoring |
Downloads:
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Data Table: INV-GCEM-1909 (Main data table for data set INV-GCEM-1909, 88 records)
Access: Public (released 01-Oct-2020)
Metadata: Text (ESA FLED),
XML (Ecological Metadata Language)
Data Formats: Spreadsheet (CSV) [8.44kb], Text File [6.93kb], MATLAB (GCE Toolbox) [48.61kb], MATLAB (Variables) [43.30kb], Text Report [39.01kb]
Column List:(hide)
Column |
Name |
Units |
Type |
Description |
1 |
Year |
YYYY |
integer |
Calendar year sample was collected |
2 |
Month |
MM |
integer |
Calenday month sample was collected |
3 |
Day |
DD |
integer |
Calendar day sample was collected |
4 |
Site |
none |
integer |
GCE study site code |
5 |
Zone |
none |
integer |
Marsh zone |
6 |
Plot |
none |
integer |
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 |
Quadrat_Area |
cm^2 |
floating-point |
Areal measurement of the quadrat frame |
15 |
Hole_Count |
Count |
integer |
Number of crab holes recorded in 625 cm^2 quadrat |
16 |
Hole_Density |
Count/m^2 |
floating-point |
Calculated number of crab holes per meter squared |
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Statistics:
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Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS |
Citation:
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Pennings, Steven C. 2019. Fall 2018 crab population monitoring: mid-marsh and creek bank abundance based on crab hole counts at 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/2618c32427f72a0ec183f805486cd516
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