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Nitrogen studies in sub-Antarctic terrestrial environments

Entry ID: ASAC_1022

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Summary

Abstract: Metadata record for data from ASAC Project 1022
See the link below for public details on this project.

---- Public Summary from Project ----
Nitrogen studies in subantarctic terrestrial environments Nitrogen is the most important nutrient that plants take up from the soil. Different forms of soil nitrogen exist and plants differ in their ability to ... access these forms. We are determining the nitrogen sources available to plants in the subantarctic environment including the role of penguin-derived nitrogen, soil micro-fauna and the effect of temperature. By studying the nitrogen sources that are used by subantarctic plants, we will be able to better understand the physiological background of species distributions in the subantarctic environment. This research will further our understanding of plant functioning under extreme environmental conditions and allow us to make predictions about the vulnerability of different species to changes in climatic conditions.

From the abstracts of the referenced papers:

In the beginning
Astronomers appear to have discovered that universes have an ecology and indeed a metabolism and no doubt our universe has a distinctive physiological ecology. The task here, however, is to address the physiological ecology of plants. Traditionally, this has deployed two approaches: the in vivo, in which physiological processes were studies at the whole plant or organ level, in field and laboratory, and the in vitro, in which cellular and subcellular processes were dissected in order to understand the mechanisms underlying physiological responses. Bringing us closer to the astronomy fraternity there is a third approach, the in silico, in which computer simulation and graphic modelling provide tools for the study of past and future plants and processes. This contribution attempts to look back to the past, to the origins of life, in order to understand the selectivity in the use of mineral elements and their roles in extant physiological ecology.
What do we know of the conditions present on early Earth that shaped the origin and evolution of life and determined the selection and roles of the mineral elements that are now essential for plant growth? The emergence of life may have occurred in a fairly short interval, microfossils are reported in 3.5-Gyr rock and there is evidence of biogenic carbon isotope fractionation in 3.8-Gyr rock. The early Earth on which life appeared was very different to the planet we inhabit today. Life originated not in a quiescent, favourable environment but rather a violent, impact-ridden one, characterised by enormous tides, intense volcanic activity and heavy meteoritic bombardment. Current thinking is that this early Earth had an atmosphere rich in carbon dioxide and nitrogen, rather than one of methane and ammonia - conditions rather unfavourable for cooking up prebiotic soups.

Related URL

Link: VIEW PROJECT HOME PAGE

Description: Public information for ASAC project 1022

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: -54.55

S: -54.75

E: 158.9

W: 158.8

Temporal Coverage

Start Date: 1996-09-30

Stop Date: 2001-03-31

Location Keywords

OCEAN > ARCTIC OCEAN

OCEAN > SOUTHERN OCEAN

OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND

GEOGRAPHIC REGION > POLAR

Science Keywords

BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ISLANDS

BIOSPHERE > VEGETATION > NITROGEN

ISO Topic Category

ELEVATION

GEOSCIENTIFIC INFORMATION

IMAGERY/BASE MAPS/EARTH COVER

INLAND WATERS

Platform

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

Instrument

ASTER > Advanced Spaceborne Thermal Emission and Reflection Radiometer

Project

EOSDIS > Earth Observing System Data Information System

ESIP > Earth Science Information Partners Program

Quality Users are advised that ASTER SWIR data acquired from late April 2008 to the present exhibit anomalous saturation of values and anomalous striping. This effect is also present for some prior acquisition periods. Please refer to the ASTER SWIR User Advisory Document (https://lpdaac.usgs.gov/sites/default/files/public/aster/docs/ASTER...) for more details.

Access Constraints None.

Use Constraints None.

Ancillary Keywords

LP DAAC

EOSDIS

Data Set Progress

COMPLETE

Originating Center

Jet Propulsion Laboratory California Institute of Technology

Data Center

Land Processes Distributed Active Archive Center

Data Center URL: https://lpdaac.usgs.gov/

Data Center Personnel
Name: LP DAAC USER SERVICES Phone: (Toll Free) (866) 573-3222 Phone: (605) 594-6116 Fax: (605) 594-6963 Email: LPDAAC at usgs.gov Contact Address: LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center 47914 252nd Street City: Sioux Falls Province or State: SD Postal Code: 57198-0001 Country: USA

Distribution

Distribution Media: HTTP

Distribution Size: ~40 MB Tiles

Distribution Format: HDF5

Personnel

LP DAAC USER SERVICES

Role: TECHNICAL CONTACT

Phone: (Toll Free) (866) 573-3222

Phone: (605) 594-6116

Fax: (605) 594-6963

Email: LPDAAC at usgs.gov

Contact Address:

LP DAAC User Services

U.S. Geological Survey (USGS)

Earth Resources Observation and Science (EROS) Center

47914 252nd Street

City: Sioux Falls

Province or State: SD

Postal Code: 57198-0001

Country: USA

Publications/References

Hulley, G.C., S.J Hook, and A.M. Baldridge (2008), ASTER Land Surface Emissivity Database of California and Nevada, Geophysical Research Letters, 35, doi:10.1029/2008GL034507

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2012-01-03

Last DIF Revision Date: 2013-01-31

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