Nitrogen studies in sub-Antarctic terrestrial environmentsEntry ID: ASAC_1022
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.
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Start Date: 1996-09-30Stop Date: 2001-03-31
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.
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Distribution Media: HTTP
Distribution Size: ~40 MB Tiles
Distribution Format: HDF5
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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
Hulley, G.C., and S.J Hook (2008), A New Methodology for Cloud Detection and Classification with Advanced Spaceborne Thermal Emission and Reflection (ASTER) Data, Geophysical Research Letters, 35, doi:10.1029/2008GL034644
Hulley, G. C. and S. J. Hook (2009), The North American ASTER land surface emissivity database (NAALSED) version 2.0, Remote Sensing of Environment, 113, 9
Hulley, G.C., and S.J. Hook (2010), Generating Consistent Land Surface Temperature and Emissivity Products Between ASTER and MODIS Data for Earth Science Research, IEEE Transactions on Geoscience and Remote Sensing, doi:10.1109/TGRS.2010.2063034
North American ASTER Land Surface Emissivity Database (NAALSED) publication references: [available online at http://emissivity.jpl.nasa.gov/pubs]
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Creation and Review Dates
DIF Creation Date: 2012-01-03
Last DIF Revision Date: 2013-01-31