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GCE-LTER Data Set Summary

Accession: PHP-GCEM-0511c Research Theme: Phytoplankton Productivity (Monitoring)
Contributors: Robert E. Hodson, Jen Mou, Ed Sheppard
Title: March 2004 surface water phytoplankton productivity for 10 Georgia Coastal Ecosystems LTER sampling sites
Abstract: Water samples were collected by Niskin bottle or by hand from just beneath the surface during low tide surveys at or near 10 GCE-LTER sampling sites in March 2004. The incorporation of radiolabelled bicarbonate in response to varying levels of illumination was measured using a photosynthetron apparatus. Photosynthesis-irradiance (P-I) curves constructed from these measurements will be used in conjunction with algal biomass and PAR versus depth measurements to estimate instantaneous gross primary production in the water at each GCE sampling site. This study was part of the GCE-LTER hydrographic monitoring program, and will be repeated quarterly.
DOI: 10.6073/pasta/78594dea4e3caedbf5d18316bac02815
Key Words: algae, bicarbonate, carbon, light, photosynthesis, photosynthetically active radiation, phytoplankton, productivity, water column
LTER Core Area: Primary Production
Research Themes: Phytoplankton Productivity
Study Period: 11-Mar-2004 to 16-Mar-2004
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
GCE-SP -- Sapelo River, Georgia, USA
GCE-DB -- Doboy Sound, Georgia, USA
GCE-AL -- Altamaha River, Georgia, USA
GCE-DP -- Duplin River, Georgia, USA
GCE-IC -- Intracoastal Waterway, Georgia, USA
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Data Table: PHP-GCEM-0511c (Main data table for data set PHP-GCEM-0511c, 240 records)

Access: Public (released 09-Nov-2005)

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

Data Formats: Spreadsheet (CSV) [30.31kb],  Text File [24.88kb],  MATLAB (GCE Toolbox) [385.05kb],  MATLAB (Variables) [277.02kb],  Text Report [58.85kb]

Column List:(hide)

Column Name Units Type Description
1 Cruise none string GCE-LTER research cruise identifier (LTER[MM][YY])
2 Date yyyy-mm-dd string Sample collection date
3 Time hh:mm GMT string Sample collection time (GMT)
4 Latitude decimal degrees floating-point Geographic latitude of sampling location
5 Longitude decimal degrees floating-point Geographic longitude of sampling location
6 Station none string Nearest nominal GCE-LTER CTD profiling station (1km geo-reference tolerance for station matching)
7 Site none integer Nearest GCE-LTER sampling site number
8 Vessel none string Vessel used to obtain the sample
9 CTD_Cast none string Corresponding CTD cast
10 Depth_Sampled none string Nominal sampling depth
11 Temperature °C floating-point Water temperature at the sampling location
12 Flag_Temperature none string QA/QC flags for Water temperature at the sampling location (flagging criteria, where "x" is Temperature: x<10="Q", x>35="Q", x<-2="I")
13 Salinity PSU floating-point Salinity at the sampling location
14 Flag_Salinity none string QA/QC flags for Salinity at the sampling location (flagging criteria, where "x" is Salinity: x<0="Q", x>35="Q", x<0="I")
15 Position none integer Position of the tube in the Photosynthetron
16 PAR_Intensity µE/m^2/s floating-point Light intensity at the photosynthetron position
17 Flag_PAR_Intensity none string QA/QC flags for Light intensity at the photosynthetron position (flagging criteria, where "x" is PAR_Intensity: x<0="Q", x>1330="Q", x<0="I", x>16600="I")
18 DPM_Added DPM floating-point Amount/activity of 14C added to the tube (mean of 3 replicate measurements)
19 Flag_DPM_Added none string QA/QC flags for Amount/activity of 14C added to the tube (mean of 3 replicate measurements) (flagging criteria, where "x" is DPM_Added: x<3500000="Q", x>8500000="Q", x<0="I")
20 DPM_Incorporated DPM floating-point Amount/activity of 14C incorporated during 1 hour incubation
21 Flag_DPM_Incorporated none string QA/QC flags for Amount/activity of 14C incorporated during 1 hour incubation (flagging criteria, where "x" is DPM_Incorporated: x<250="Q", x>3500000="Q", x<0="I", x>=DPM_Added="I", manual)
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Hodson, Robert E. 2005. March 2004 surface water phytoplankton productivity for 10 Georgia Coastal Ecosystems LTER sampling sites. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/78594dea4e3caedbf5d18316bac02815

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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.