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GCELTER Data Set Summary
Accession:

MLTGCET1106b

Research Theme:

MultiDisciplinary Study (Graduate Thesis Study)

Contributors:

Brittany DeLoach McCall, Steve Pennings, Huy Vu, Kazik Wieski, Hongyu Guo, Michael Richardson, Brittany DeLong, Claudia Grimm, Annika Stark

Title:

Experimental plots studies comparing the impact of fertilization and wrack addition on invertebrate abundance and plant cover in Atlantic and Gulf of Mexico salt marshes from April 2009 to September 2010

Abstract:

Understanding the relative strengths of topdown and bottomup forces is an important key to predicting the structure of biological communities. The strength of these effects can be regulated in part by predator abundance and nutrient availability. In 2009, we hypothesized that the importance of these factors varies geographically between the southeastern Atlantic Coast and the Gulf Coast due to differences in tidal regime, and began to study this variation using a biogeographic, manipulative field experiment. Although our original purpose was to understand the structure of salt marsh arthropod food webs, BP's Deepwater Horizon spill in the Gulf Coast presented an opportunity to understand how stress from an oil spill might affect the variables that we were measuring. The fact that we had plots and transect sampling in place at multiple sites along the Gulf and East Coasts put us in a position to evaluate any impacts that might occur if oil hit some of the sites. The study was conducted at 11 sites across the Gulf Coast, from Texas to Florida, and 11 sites along the Atlantic Coast, from Florida to Maine. At each site, experimental plots were sampled and a 100m transect was sampled near the plots within 5m of the high marsh boundary. Sampling was conducted in May 2009, August 2009, and August 2010. In 2010, four extra sites were added to the existing experimental sites because of known oil contamination, and another site was added as an extra control. Only the transect sampling was conducted at these sites. This dataset contains all the data from experimental plots; experimental treatments of fertilizer addition, wrack addition, fertilizer & wrack addition, and no addition (control) were randomly applied to the plots. The plot treatments were maintained in August 2009 and May 2010.

DOI:

10.6073/pasta/6e33b914618a9d5d112fb70a8ff230b1

Key Words:

abundance, Acridid, arthropods, Cecidomyiidae, Chaetopsis, Chloropidae, Delphacodes, Dolichopodidae, ecosystems, Foraminifera, Geukensia, insects, invertebrates, irradiance, Ischnodemus, latitude, Littoraria, longitude, marine, Megamealus, Melampus, nematodes, Oligochaetes, plants, Polychaetes, Prokelisia, Tettigoniid, Trigonotylus, Tytthus

LTER Core Area:

Disturbance Patterns

Research Themes:

MultiDisciplinary Study, Aquatic Invertebrate Ecology, Plant Ecology, Population Ecology, Terrestrial Insect Ecology 
Study Period:

25Apr2009 to 15Sep2010

Study Sites:


Species References:

Delphacodes penedetecta,
Geukensia demissa,
Littoraria irrorata,
Melampus bidentatus,
Prokelisia marginata,
Spartina alterniflora,
Trigonotylus uhleri,
Tytthus vagus 
Data References:

MLTGCET1106a (Corresponding transect survey data set)

Publications:

McCall, B.D. 2011. Geographic Variation in the Structure of Salt Marsh Arthropod Communities. M.S. Thesis. University of Houston, Houston, Texas. 51 pages.

Downloads:

Data Table: MLTGCET1106b (Main data table for data set MLTGCET1106b, 176 records)
Access: Public (released 01Jan2012)
Metadata: Text (ESA FLED),
XML (Ecological Metadata Language)
Data Formats: Spreadsheet (CSV) [28.02kb], Text File [31.72kb], MATLAB (GCE Toolbox) [280.27kb], MATLAB (Variables) [283.16kb], Text Report [103.80kb]
Column List:(hide)
Column 
Name 
Units 
Type 
Description 
1 
Location 
none 
string 
Name of the sampling location 
2 
Latitude 
degrees 
floatingpoint 
Geographic latitude of the sampling location 
3 
Longitude 
degrees 
floatingpoint 
Geographic longitude of the sampling location 
4 
Day 
D 
integer 
Calendar day site was sampled 
5 
Month 
M 
integer 
Calendar month site was sampled 
6 
Year 
YYYY 
integer 
Calendar year site was sampled 
7 
Treatment 
none 
integer 
Treatment applied to the plot 
8 
Spartina_Cover 
percent 
floatingpoint 
percent cover of Spartina in 0.5 x 0.5 m quadrat 
9 
Dead_Plant_Cover 
percent 
floatingpoint 
percent cover of dead plant material in 0.5 x 0.5 m quadrat 
10 
Spartina_Height 
cm 
floatingpoint 
Height of tallest Spartina alterniflora plant 
11 
PAR_Above_Canopy 
µE/m^2/s 
floatingpoint 
PAR reading above plant canopy 
12 
PAR_Below_Canopy 
µE/m^2/s 
floatingpoint 
PAR reading at soil level 
13 
Light_Intercepted 
ratio 
floatingpoint 
Fraction of light intercepted by the canopy 
14 
Trigonotylus_uhleri_Count_DVac 
count 
integer 
Number of Trigonotylus uhleri in pooled DVac sample 
15 
Leafhopper_Count_DVac 
count 
integer 
Number of leafhoppers in pooled DVac sample 
16 
Prokelisia_Count_DVac 
count 
integer 
Number of Prokelisia in pooled DVac sample 
17 
Delphacodes_penedetecta_Count_DVac 
count 
integer 
Number of Delphacodes penedetecta in pooled DVac sample 
18 
Megamealus_Count_DVac 
count 
integer 
Number of Megamealus in pooled DVac sample 
19 
Immature_Delphacids_Count_DVac 
count 
integer 
Number of immature Delphacids in pooled DVac sample 
20 
Other_Planthopper_Count_DVac 
count 
integer 
Number of other Planthoppers in pooled DVac sample 
21 
Ischnodemus_Count_DVac 
count 
integer 
Number of Ischnodemus in pooled DVac sample 
22 
Tettigonid_Count_DVac 
count 
integer 
Number of Tettigonid in pooled DVac sample 
23 
Acridid_Count_DVac 
count 
integer 
Number of Acridid in pooled DVac sample 
24 
Thrips_Count_DVac 
count 
integer 
Number of Thrips in pooled DVac sample 
25 
Weevil_Count_DVac 
count 
integer 
Number of weevils in pooled DVac sample 
26 
Chaetopsis_Fly_Count_DVac 
count 
integer 
Number of Chaetopsis fly in pooled DVac sample 
27 
Chloropidae_Count_DVac 
count 
integer 
Number of Chloropidae in pooled DVac sample 
28 
Cecidomyiidae_Count_DVac 
count 
integer 
Number of Cecidomyiidae in pooled DVac sample 
29 
Dolichopodidae_Count_DVac 
count 
integer 
Number of Dolichopodidae in pooled DVac sample 
30 
Other_Herbivore_Count_DVac 
count 
integer 
Number of other herbivores in pooled DVac sample 
31 
Tythus_vagus_Count_DVac 
count 
integer 
Number of Tythus vagus in pooled DVac sample 
32 
Naemia_Count_DVac 
count 
integer 
Number of Naemia in pooled DVac sample 
33 
Hogna_Count_DVac 
count 
integer 
Number of Hogna in pooled DVac sample 
34 
Pardosa_Count_DVac 
count 
integer 
Number of Pardosa in pooled DVac sample 
35 
Marpissa_Count_DVac 
count 
integer 
Number of Marpissa in pooled DVac sample 
36 
Other_Salticid_Count_DVac 
count 
integer 
Number of other Salticid in pooled DVac sample 
37 
Clubionid_Count_DVac 
count 
integer 
Number of Clubionid in pooled DVac sample 
38 
Tetragnatha_Count_DVac 
count 
integer 
Number of Tetragnatha in pooled DVac sample 
39 
Grammonota_Count_DVac 
count 
integer 
Number of Grammonota in pooled DVac sample 
40 
Other_Spider_Count_DVac 
count 
integer 
Number of other spiders in pooled DVac sample 
41 
Other_Predator_Count_DVac 
count 
integer 
Number of other predators in pooled DVac sample 
42 
Wasp_Count_DVac 
count 
integer 
Number of wasps in pooled DVac sample 
43 
Collembola_Count_DVac 
count 
integer 
Number of Collembola in pooled DVac sample 
44 
Brachycera_Count_DVac 
count 
integer 
Number of Brachycera in pooled DVac sample 
45 
Nematocera_Count_DVac 
count 
integer 
Number of Nematocera in pooled DVac sample 
46 
Ant_Count_DVac 
count 
integer 
Number of ants in pooled DVac sample 
47 
Dragonfly_Count_DVac 
count 
integer 
Number of dragonflies in pooled DVac sample 
48 
Cricket_Count_DVac 
count 
integer 
Number of crickets in pooled DVac sample 
49 
Amphipod_Count_DVac 
count 
integer 
Number of Amphipods in pooled DVac sample 
50 
Coleoptera_Count_DVac 
count 
integer 
Number of Coleoptera in pooled DVac sample 
51 
Crab_Count_DVac 
count 
integer 
Number of crabs in pooled DVac sample 
52 
Mite_Count_DVac 
count 
integer 
Number of mites in pooled DVac sample 
53 
Total_Arthropod_Count_DVac 
count 
integer 
Total arthropods in pooled DVac sample 

Statistics:

Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS 
Citation:

McCall, Brittany DeLoach. 2011. Experimental plots studies comparing the impact of fertilization and wrack addition on invertebrate abundance and plant cover in Atlantic and Gulf of Mexico salt marshes from April 2009 to September 2010. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/6e33b914618a9d5d112fb70a8ff230b1

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