Patterns of CO2 exchange in biological soil crusts of successional age
The objective of this paper was to determine whether CO2 exchange rates could be used as an indicator for determining the state of development and species or functional composition of biological soil crusts in dierent successional stages. We quantified the CO2 exchange rates, i.e., CO2 assimilation...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.455.122 2023-05-15T15:10:45+02:00 Patterns of CO2 exchange in biological soil crusts of successional age Eli Zaadya Uwe Kuhnb Burkhard Wilskeb Lisseth S Jurgen Kesselmeierb The Pennsylvania State University CiteSeerX Archives 1999 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.122 http://directory.umm.ac.id/Data Elmu/jurnal/S/Soil Biology And Chemistry/Vol32.Issue7.Jul2000/1614.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.122 http://directory.umm.ac.id/Data Elmu/jurnal/S/Soil Biology And Chemistry/Vol32.Issue7.Jul2000/1614.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://directory.umm.ac.id/Data Elmu/jurnal/S/Soil Biology And Chemistry/Vol32.Issue7.Jul2000/1614.pdf Biological soil crust CO2 exchange Succession Respiration Assimilation text 1999 ftciteseerx 2016-01-08T06:08:09Z The objective of this paper was to determine whether CO2 exchange rates could be used as an indicator for determining the state of development and species or functional composition of biological soil crusts in dierent successional stages. We quantified the CO2 exchange rates, i.e., CO2 assimilation and respiration, in samples from dierent microhabitats at two dierent sites in the Negev desert. In the successional pathway of the crust communities, the pioneers in colonising the soil surface are the cyanobacteria; green algae, mosses and lichens then follow. Physical influences such as soil structure and types, radiation intensity, and topographic traits such as slope directions that aect water availability and soil moisture, influence the successional pathways and the soil crust community. When physical conditions are the same, disturbances are key factors for a specific successional stage. We found a substantial gradient of CO2 exchange at the Nizzana site for both respiration and photosynthesis. Samples from the sand dunes at the Nizzana site showed a pronounced activity gradient with high rates for assimilation (around 70 mmol CO2 m ÿ2 minÿ1) as well as respiration (60–70 mmol CO2 m ÿ2 minÿ1) at the base of dunes, decreasing towards the top. The soil crust samples of the Negev desert show comparable values. Hence, as ecotypes containing such biological soil crusts with dominant photosynthetically active organisms are a widespread phenomenon in desert, boreal and arctic systems, their contribution to the global cycling of trace gases and elements can be significant for global Text Arctic Unknown Arctic |
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English |
topic |
Biological soil crust CO2 exchange Succession Respiration Assimilation |
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Biological soil crust CO2 exchange Succession Respiration Assimilation Eli Zaadya Uwe Kuhnb Burkhard Wilskeb Lisseth S Jurgen Kesselmeierb Patterns of CO2 exchange in biological soil crusts of successional age |
topic_facet |
Biological soil crust CO2 exchange Succession Respiration Assimilation |
description |
The objective of this paper was to determine whether CO2 exchange rates could be used as an indicator for determining the state of development and species or functional composition of biological soil crusts in dierent successional stages. We quantified the CO2 exchange rates, i.e., CO2 assimilation and respiration, in samples from dierent microhabitats at two dierent sites in the Negev desert. In the successional pathway of the crust communities, the pioneers in colonising the soil surface are the cyanobacteria; green algae, mosses and lichens then follow. Physical influences such as soil structure and types, radiation intensity, and topographic traits such as slope directions that aect water availability and soil moisture, influence the successional pathways and the soil crust community. When physical conditions are the same, disturbances are key factors for a specific successional stage. We found a substantial gradient of CO2 exchange at the Nizzana site for both respiration and photosynthesis. Samples from the sand dunes at the Nizzana site showed a pronounced activity gradient with high rates for assimilation (around 70 mmol CO2 m ÿ2 minÿ1) as well as respiration (60–70 mmol CO2 m ÿ2 minÿ1) at the base of dunes, decreasing towards the top. The soil crust samples of the Negev desert show comparable values. Hence, as ecotypes containing such biological soil crusts with dominant photosynthetically active organisms are a widespread phenomenon in desert, boreal and arctic systems, their contribution to the global cycling of trace gases and elements can be significant for global |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Eli Zaadya Uwe Kuhnb Burkhard Wilskeb Lisseth S Jurgen Kesselmeierb |
author_facet |
Eli Zaadya Uwe Kuhnb Burkhard Wilskeb Lisseth S Jurgen Kesselmeierb |
author_sort |
Eli Zaadya |
title |
Patterns of CO2 exchange in biological soil crusts of successional age |
title_short |
Patterns of CO2 exchange in biological soil crusts of successional age |
title_full |
Patterns of CO2 exchange in biological soil crusts of successional age |
title_fullStr |
Patterns of CO2 exchange in biological soil crusts of successional age |
title_full_unstemmed |
Patterns of CO2 exchange in biological soil crusts of successional age |
title_sort |
patterns of co2 exchange in biological soil crusts of successional age |
publishDate |
1999 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.122 http://directory.umm.ac.id/Data Elmu/jurnal/S/Soil Biology And Chemistry/Vol32.Issue7.Jul2000/1614.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://directory.umm.ac.id/Data Elmu/jurnal/S/Soil Biology And Chemistry/Vol32.Issue7.Jul2000/1614.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.122 http://directory.umm.ac.id/Data Elmu/jurnal/S/Soil Biology And Chemistry/Vol32.Issue7.Jul2000/1614.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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1766341719656235008 |