The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate
We review measured rates of soil respiration from terrestrial and wetland ecosystems to define the annual global CO2 flux from soils, to identify uncertainties in the global flux estimate, and to investigate the influences of temperature, precipitation, and vegetation on soil respiration rates. The...
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ftiowastateuniv:oai:lib.dr.iastate.edu:eeob_ag_pubs-1225 2023-05-15T18:40:38+02:00 The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate Raich, James W. Schlesinger, W.H. 1992-04-01T08:00:00Z application/pdf https://lib.dr.iastate.edu/eeob_ag_pubs/225 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1225&context=eeob_ag_pubs en eng Iowa State University Digital Repository https://lib.dr.iastate.edu/eeob_ag_pubs/225 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1225&context=eeob_ag_pubs http://creativecommons.org/licenses/by/3.0/ CC-BY Ecology, Evolution and Organismal Biology Publications Climate Ecology and Evolutionary Biology Soil Science text 1992 ftiowastateuniv 2018-11-26T00:40:47Z We review measured rates of soil respiration from terrestrial and wetland ecosystems to define the annual global CO2 flux from soils, to identify uncertainties in the global flux estimate, and to investigate the influences of temperature, precipitation, and vegetation on soil respiration rates. The annual global CO2 flux from soils is estimated to average (± S.D.) 68 ± 4 PgC/ yr, based on extrapolations from biome land areas. Relatively few measurements of soil respiration exist from arid, semi-arid, and tropical regions; these regions should be priorities for additional research. On a global scale, soil respiration rates are positively correlated with mean annual air temperatures and mean annual precipitation. There is a close correlation between mean annual net primary productivity (NPP) of different vegetation biomes and their mean annual soil respiration rates, with soil respiration averaging 24% higher than mean annual NPP. This difference represents a minimum estimate of the contribution of root respiration to the total soil CO2efflux. Estimates of soil C turnover rates range from 500 years in tundra and peaty wetlands to 10 years in tropical savannas. We also evaluate the potential impacts of human activities on soil respiration rates, with particular focus on land use changes, soil fertilization, irrigation and drainage, and climate changes. The impacts of human activities on soil respiration rates are poorly documented, and vary among sites. Of particular importance are potential changes in temperatures and precipitation. Based on a review of in situ measurements, the Q10value for total soil respiration has a median value of 2.4. Increased soil respiration with global warming is likely to provide a positive feedback to the greenhouse effect. Text Tundra Digital Repository @ Iowa State University |
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Open Polar |
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Digital Repository @ Iowa State University |
op_collection_id |
ftiowastateuniv |
language |
English |
topic |
Climate Ecology and Evolutionary Biology Soil Science |
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Climate Ecology and Evolutionary Biology Soil Science Raich, James W. Schlesinger, W.H. The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
topic_facet |
Climate Ecology and Evolutionary Biology Soil Science |
description |
We review measured rates of soil respiration from terrestrial and wetland ecosystems to define the annual global CO2 flux from soils, to identify uncertainties in the global flux estimate, and to investigate the influences of temperature, precipitation, and vegetation on soil respiration rates. The annual global CO2 flux from soils is estimated to average (± S.D.) 68 ± 4 PgC/ yr, based on extrapolations from biome land areas. Relatively few measurements of soil respiration exist from arid, semi-arid, and tropical regions; these regions should be priorities for additional research. On a global scale, soil respiration rates are positively correlated with mean annual air temperatures and mean annual precipitation. There is a close correlation between mean annual net primary productivity (NPP) of different vegetation biomes and their mean annual soil respiration rates, with soil respiration averaging 24% higher than mean annual NPP. This difference represents a minimum estimate of the contribution of root respiration to the total soil CO2efflux. Estimates of soil C turnover rates range from 500 years in tundra and peaty wetlands to 10 years in tropical savannas. We also evaluate the potential impacts of human activities on soil respiration rates, with particular focus on land use changes, soil fertilization, irrigation and drainage, and climate changes. The impacts of human activities on soil respiration rates are poorly documented, and vary among sites. Of particular importance are potential changes in temperatures and precipitation. Based on a review of in situ measurements, the Q10value for total soil respiration has a median value of 2.4. Increased soil respiration with global warming is likely to provide a positive feedback to the greenhouse effect. |
format |
Text |
author |
Raich, James W. Schlesinger, W.H. |
author_facet |
Raich, James W. Schlesinger, W.H. |
author_sort |
Raich, James W. |
title |
The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
title_short |
The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
title_full |
The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
title_fullStr |
The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
title_full_unstemmed |
The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
title_sort |
global carbon dioxide flux in soil respiration and its relationship to vegetation and climate |
publisher |
Iowa State University Digital Repository |
publishDate |
1992 |
url |
https://lib.dr.iastate.edu/eeob_ag_pubs/225 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1225&context=eeob_ag_pubs |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Ecology, Evolution and Organismal Biology Publications |
op_relation |
https://lib.dr.iastate.edu/eeob_ag_pubs/225 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1225&context=eeob_ag_pubs |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766230022725566464 |