The spatial and temporal variability of nutrients (nitrogen, phosporous, carbon) and plant biomass (cyanobacterial biofilms) on the McMurdo Ice Shelf ecosystem
Entry ID:
K081_1987_1988_NZ_1
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Summary
Abstract:
The area near Bratina Island was studied by examining scales (large and small) of variability (spatial and temporal) of nutrients and plant biomass on the McMurdo Ice Shelf (MIS) with an aim to examine the role of the abundant cyanobacterial biofilm communities in controlling the supply and demand of dissolved nitrogen. Special emphasis was placed on the assessment of cyanobacterial growth and ... nutrient uptake rates on the processes of N-fixation, nitrification and denitrification. Data collected for each scale of variability includes transects surveys (ice/soil/water, standing/flowing water, ice capped Y/N, depth, flow guaged, water; colour, temperature, conductivity, benthic mats; colour, length, thickness), water samples for pigment and biomass analysis and water nutrients, monitoring the freeze-thaw cycle of two ponds and changes in the plankton, chlorophyll a content, N and P concentrations in 6 study ponds, comparison of the planktonic component of 6 ponds including conductivity, dissolved inorganic carbon, chlorophyll a concentration, primary production, N and P concentrations, benthic core samples for assessment of algal abundance, and oxygen electrodes measured profiles of oxygen and photosynthesis respiration of mats and the diel changes in pond water temperature. 
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: -78.0
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S: -78.0
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E: 165.33
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W: 165.33
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Temporal Coverage
Start Date:
1988-01-04
Stop Date:
1988-01-30
Quality
ATTRIBUTE ACCURACY REPORT: An attribute accuracy report was not conducted for these data.
LOGICAL CONSISTENCY REPORT: A logical consistency report was not conducted for these data.
COMPLETENESS REPORT: The data is thought to be complete; no data has been purposefully excluded.
HORIZONTAL POSITIONAL ACCURACY REPORT: A positional accuracy report was not conducted for these data. Most data used to create the georegulations data came from MassGIS, NOAA, or MMS. Consequently, by and large the data are as accurate as the source data.
VERTICAL POSITIONAL ACCURACY REPORT: n/a
Access Constraints
ACCESS CONSTRAINTS: None. These data are in the public domain. GIS files are freely available for download.
DISTRIBUTION LIABILITY: Although every effort has been made to ensure the accuracy of these data, errors and conditions originating from physical sources used to develop these data may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for ... the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. In no event shall CZM be liable for any damages, whether general, special, incidental or consequential damages, arising out of your use of these data. Your sole remedy for damages is to stop using the data. You agree to defend, indemnify, and hold harmless CZM and its employees against any claim, loss, liability or expense, including attorneys' fees, resulting from loss of or damage to property or the injury to or death of any person arising out of the use of the data.
Use Constraints
USE CONSTRAINTS: Public domain data from the Massachusetts Office of Coastal Zone Management (CZM), an agency of the Commonwealth of Massachusetts Executive Office of Environmental Affairs, are freely redistributable with proper metadata and source attribution. Please recognize the Massachusetts Office of Coastal Zone Management as the source of these data. You are not permitted to use CZM's name ... or to suggest that CZM endorses your project or product, without its express written consent. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CZM cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers. The user must be aware of data conditions and bear responsibility for the appropriate use of these data with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to these data.
FEES: GIS and coordinate files may be downloaded at no charge by following links on the Massachusetts Office of Coastal Zone Management website (http://www.mass.gov/czm/).
Data Set Progress
COMPLETE
Distribution
Distribution Size:
0.002
Fees:
See Use Constraints.
Personnel
Role:
TECHNICAL CONTACT
Phone:
617-626-1200
Fax:
617-626-1240
Email:
czm at state.ma.us
Contact Address:
251 Causeway Street, Suite 800
City:
Boston
Province or State:
MA
Postal Code:
02114-2136
Country:
USA
Role:
DIF AUTHOR
Phone:
617-626-1200
Fax:
617-626-1240
Email:
czm at state.ma.us
Contact Address:
251 Causeway Street, Suite 800
City:
Boston
Province or State:
MA
Postal Code:
02114-2136
Country:
USA
Creation and Review Dates
DIF Creation Date:
2008-09-19
Last DIF Revision Date:
2009-01-22
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