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GCE-LTER Data Set Summary

Accession: ALG-GCED-0304a Research Theme: Algal Productivity (Directed Study)
Contributors: Samantha B. Joye, Rosalynn Lee
Title: Benthic chlorophyll concentrations and gross oxygenic photosynthesis rates in surficial estuarine intertidal sediments at sites on Sapelo Island and near the Satilla River from January, April, June and July 2001
Abstract: Seasonal patterns of estuarine creek-bank and intertidal marsh benthic chlorophyll and gross oxygenic photosynthesis were investigated at several sites on Sapelo Island and the Satilla River in coastal Georgia. Benthic chlorophyll were measured in the bulk surface centimeter depth of sediment. Gross oxygenic photosynthesis rates were integrated over 100 um resolution measurements below the sediment water interface using oxygen microelectrodes. Several relatively pristine sites on Sapelo Island (Moses Hammock, Dean Creek and Marine Institute) and a presumably heavily impacted site (Dover Bluff) show similar levels of chlorophyll concentration and photosynthesis rate across bank and marsh zones with higher photosynthetic biomass and activity in the spring season. Nutrient inputs to these study sites are also suggested as a control on gross oxygenic photosynthesis rates as evidenced by a relationship between photosynthesis rate and land-use.
DOI: 10.6073/pasta/5517eb03b9acc7091362e9ad05ecb475
Key Words: benthic, biogeochemistry, chlorophyll, oxygen, sediments
LTER Core Area: Primary Production
Research Themes: Algal Productivity
Study Period: 27-Jan-2001 to 20-Jul-2001
Study Sites:
GCE6 -- Dean Creek, Sapelo Island, Georgia, USA
GCE10 -- Hunt Camp, Sapelo Island, Georgia, USA
UGAMI -- UGA Marine Institute, Sapelo Island, Georgia, USA
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Data Table: ALG-GCED-0304a (Main data table for data set ALG-GCED-0304a, 153 records)

Access: Public (released 08-Apr-2005)

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

Data Formats: Spreadsheet (CSV) [6.21kb],  Text File [5.13kb],  MATLAB (GCE Toolbox) [133.43kb],  MATLAB (Variables) [103.35kb],  Text Report [23.15kb]

Column List:(hide)

Column Name Units Type Description
1 Year YYYY integer Year of sample collection
2 Month MM integer Month of sample collection
3 Day DD integer Day of sample collection
4 Station none string Site location code
5 Zone none integer Site location zone
6 Replicate none string Sample replicate code (number = sample number from across the station, letter = replication at a particular number area)
7 ChlorA_Conc mg/m^2 floating-point Surface sediment chlorophyll a concentration
8 PAR µE/m^2/s floating-point Light intensity at which gross oxygenic photosynthesis was measured
9 Gross_Photosynth mmol/m^2/h floating-point Gross oxygenic photosynthesis rate (i.e. oxygen production rate)
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Citation: Joye, Samantha B. 2003. Benthic chlorophyll concentrations and gross oxygenic photosynthesis rates in surficial estuarine intertidal sediments at sites on Sapelo Island and near the Satilla River from January, April, June and July 2001. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/5517eb03b9acc7091362e9ad05ecb475

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This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959, OCE-1237140 and OCE-1832178. 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.