Studies of global change and associated declines in
Low-diversity ecosystems cover large portions of the Earth’s land surface, yet studies of climate change on ecosystem functioning typically focus on temperate ecosystems, where diversity is high and the effects of individual species on ecosystem functioning are difficult to determine. We show that a...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.663.9789 2023-05-15T13:38:31+02:00 Studies of global change and associated declines in The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.663.9789 http://adamslab.byu.edu/Portals/74/docs/Papers/Barrett2008GlobalChangeBiology.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.663.9789 http://adamslab.byu.edu/Portals/74/docs/Papers/Barrett2008GlobalChangeBiology.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://adamslab.byu.edu/Portals/74/docs/Papers/Barrett2008GlobalChangeBiology.pdf Antarctica carbon cycling climate change McMurdo Dry Valleys nematode soil biodiversity text ftciteseerx 2016-01-08T17:00:35Z Low-diversity ecosystems cover large portions of the Earth’s land surface, yet studies of climate change on ecosystem functioning typically focus on temperate ecosystems, where diversity is high and the effects of individual species on ecosystem functioning are difficult to determine. We show that a climate-induced decline of an invertebrate species in a low-diversity ecosystem could contribute to significant changes in carbon (C) cycling. Recent climate variability in the McMurdo Dry Valleys of Antarctica is asso-ciated with changes in hydrology, biological productivity, and community composition of terrestrial and aquatic ecosystems. One of the greatest changes documented in the dry valleys is a 65 % decrease in the abundance of the dominant soil invertebrate (Scottnema lindsayae, Nematoda) between 1993 and 2005, illustrating sensitivity of biota in this ecosystem to small changes in temperature. Globally, such declines are expected to have significant influences over ecosystem processes such as C cycling. To determine the implications of this climate-induced decline in nematode abundance on soil C cycling we followed the fate of a 13C tracer added to soils in Taylor Valley, Antarctica. Carbon assimilation by the dry valley nematode community contributed significantly to soil C cycling (2–7 % of the heterotrophic C flux). Thus, the influence of a climate-induced decline in abundance of a dominant species may have a significant effect on ecosystem functioning in a low-diversity ecosystem. Text Antarc* Antarctica McMurdo Dry Valleys Unknown McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) |
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English |
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Antarctica carbon cycling climate change McMurdo Dry Valleys nematode soil biodiversity |
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Antarctica carbon cycling climate change McMurdo Dry Valleys nematode soil biodiversity Studies of global change and associated declines in |
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Antarctica carbon cycling climate change McMurdo Dry Valleys nematode soil biodiversity |
description |
Low-diversity ecosystems cover large portions of the Earth’s land surface, yet studies of climate change on ecosystem functioning typically focus on temperate ecosystems, where diversity is high and the effects of individual species on ecosystem functioning are difficult to determine. We show that a climate-induced decline of an invertebrate species in a low-diversity ecosystem could contribute to significant changes in carbon (C) cycling. Recent climate variability in the McMurdo Dry Valleys of Antarctica is asso-ciated with changes in hydrology, biological productivity, and community composition of terrestrial and aquatic ecosystems. One of the greatest changes documented in the dry valleys is a 65 % decrease in the abundance of the dominant soil invertebrate (Scottnema lindsayae, Nematoda) between 1993 and 2005, illustrating sensitivity of biota in this ecosystem to small changes in temperature. Globally, such declines are expected to have significant influences over ecosystem processes such as C cycling. To determine the implications of this climate-induced decline in nematode abundance on soil C cycling we followed the fate of a 13C tracer added to soils in Taylor Valley, Antarctica. Carbon assimilation by the dry valley nematode community contributed significantly to soil C cycling (2–7 % of the heterotrophic C flux). Thus, the influence of a climate-induced decline in abundance of a dominant species may have a significant effect on ecosystem functioning in a low-diversity ecosystem. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Studies of global change and associated declines in |
title_short |
Studies of global change and associated declines in |
title_full |
Studies of global change and associated declines in |
title_fullStr |
Studies of global change and associated declines in |
title_full_unstemmed |
Studies of global change and associated declines in |
title_sort |
studies of global change and associated declines in |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.663.9789 http://adamslab.byu.edu/Portals/74/docs/Papers/Barrett2008GlobalChangeBiology.pdf |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
McMurdo Dry Valleys Taylor Valley |
geographic_facet |
McMurdo Dry Valleys Taylor Valley |
genre |
Antarc* Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys |
op_source |
http://adamslab.byu.edu/Portals/74/docs/Papers/Barrett2008GlobalChangeBiology.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.663.9789 http://adamslab.byu.edu/Portals/74/docs/Papers/Barrett2008GlobalChangeBiology.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766107532358582272 |