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Record Search Query:

Life In The Ice: Microbial Diversity and Function in Antarctic Sea Ice Ecosystems

Entry ID: K043_2010_2012_NZ_2

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Summary

Abstract: Our hypothesis is that ‘spatial and temporal variations in diversity and ecosystem function of the sea ice microbial community are sensitive indicators of changing climatic conditions’. The research will develop baseline long-term data on microbial biodiversity and community structure in the “grass” of ice-covered regions – the primary and secondary producers at the base of the food web. We will ... do this using both conventional methods and molecular technology, and will quantify abundances and species identifications using a range of traditional and modern techniques including DNA fingerprints, high throughput sequencing and single cell genome amplification. We will develop an understanding of the functional role of various components of the sea ice microbial community using ecophysiological methods we have developed over nearly 20 years of Antarctic research coupled with new technologies brought together with our international collaborators on this project.

Microorganisms are the most diverse and by far the most abundant biological entities in marine environments and they are often sensitive indicators of environmental change because of their rapid lifecycles. Given the projected changes to the volume and extent of annual sea ice, SIMCO or ‘sea ice microbial communities’ provide an ideal model system to measure the effects of environmental change in Polar Regions. This research will generate a bio-inventory of the microorganisms in sea ice using both conventional methods and molecular technology, and will quantify abundances to generate community fingerprints for each field site.

In 2010-2011 our research was conducted at Cape Evans. The following data was collected.
- CTD (conductivity/temperature/depth) casts of temperature, conductivity, salinity, depth, live chlorophyll were made each day at solar noon through the sea ice to bottom (25m).
- PAR recorded at 5m above sea ice, using Skye light sensors. (units of microeinsteins /m2/s for PAR and microW per cm2 for UVB. Data were recorded daily at solar noon.
- HOBO data loggers embedded in sea ice at approx 300mm intervals through the depth of the ice (2m). Recording continuously at 10 min intervals.

In 2011-2012 our research was conducted at Turtle Rock and Cape Evans. The following data was collected.
- Turtle rock: CTD casts of temperature, conductivity, salinity, depth, live chlorophyll were made each day at solar noon through the sea ice to bottom (25m).
- Air temperature, solar visible and UVB irradiances were recorded each day at solar noon (approx 1330)
- Cape Evans: CTD casts of temperature, conductivity, salinity, depth, live chlorophyll were madeon selected days at approximately solar noon through the sea ice to bottom (30m)

Geographic Coverage

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Spatial coordinates

N: -77.63

S: -77.63

E: 166.4

W: 166.4

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N: -77.74

S: -77.74

E: 166.78

W: 166.78

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N: -77.38

S: -77.38

E: 166.24

W: 166.24

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Temporal Coverage

Start Date: 2011-11-08

Location Keywords

CONTINENT > ANTARCTICA > CAPE EVANS

CONTINENT > ANTARCTICA > TURTLE ROCK

CONTINENT > ANTARCTICA

GEOGRAPHIC REGION > POLAR

Science Keywords

BIOLOGICAL CLASSIFICATION > PROTISTS > PLANKTON > PHYTOPLANKTON
BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS

ISO Topic Category

BIOTA

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

GEOSCIENTIFIC INFORMATION

IMAGERY/BASE MAPS/EARTH COVER

Platform

TERRA > Earth Observing System, TERRA (AM-1)

Instrument

Cameras

MISR > Multi-Angle Imaging SpectroRadiometer

Project

EOSDIS > Earth Observing System Data Information System

ESIP > Earth Science Information Partners Program

MISR > Multi-angle Imaging SpectroRadiometer

CWIC > CEOS WGISS Integrated Catalog

Ancillary Keywords

DIRECTIONAL REFLECTANCE FACTOR

REFLECTANCE

Data Set Progress

IN WORK

Data Center

Atmospheric Science Data Center, Science Directorate, Langley Research Center, NASA

Data Center URL: http://eosweb.larc.nasa.gov/
Dataset ID: MISR Level 3 Component Global Land Product covering a month V004

Data Center Personnel
Name: ASDC USER SERVICES Phone: 757-864-8656 Email: support-asdc at earthdata.nasa.gov Contact Address: NASA Langley Atmospheric Science Data Center User and Data Services NASA Langley Research Center Mail Stop 157D City: Hampton Province or State: VA Postal Code: 23681-2199 Country: USA

Personnel

ASDC USER SERVICES

Role: DIF AUTHOR

Phone: 757-864-8656

Email: support-asdc at earthdata.nasa.gov

Contact Address:

NASA Langley Atmospheric Science Data Center

User and Data Services

NASA Langley Research Center

Mail Stop 157D

City: Hampton

Province or State: VA

Postal Code: 23681-2199

Country: USA

DAVID, DR. J. DINER

Role: INVESTIGATOR

Phone: 818-354-6319

Fax: 818-393-4616

Email: david.j.diner at nasa.gov

Contact Address:

Jet Propulsion Laboratory

4800 Oak Grove Drive

City: Pasadena

Province or State: CA

Postal Code: 91109-8099

Country: USA

Publications/References

Diner, D.J., J.C. Beckert, T.H. Reilly, C.J. Bruegge, J.E. Conel, R. Kahn, J.V. Martonchik, T.P. Ackerman, R. Davies, S.A.W. Gerstl, H.R. Gordon, J-P. Muller, R.B. Myneni,R.J. Sellers, B. Pinty, and M.M. Verstraete (1988). Multiangle Imaging SpectroRadiometer (MISR) description and experiment overview. IEEE Trans. Geosci. Rem. Sens., Vol. 36, pp 1072-1087.

Martonchik, J.V., ...

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2004-01-27

Last DIF Revision Date: 2013-06-04

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