Carbon Dioxide Emission from Streams and Rivers as an Integrative Part of Terrestrial Respiration

Shaoda Liu
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Shaoda Liu: Department of Geography, National University of Singapore, Singapore

International Journal of Environmental Sciences & Natural Resources, 2019, vol. 19, issue 2, 50-54

Abstract: Streams and rivers emit significant CO2 to the atmosphere and are ecologically heterotrophic receiving carbon inputs from the terrestrial ecosystem. Despite close coupling between two ecosystems, CO2 emission from streams and rivers has never been integrated or compared to other terrestrial carbon fluxes. Here a framework integrating stream and river CO2 emission to terrestrial carbon fluxes was proposed for a better perspective of the role of streams and rivers in global carbon cycle. Using terrestrial net primary product (NPP) as the base for comparison, it is found that streams and rivers emitted more carbon than expected from their areal extent on the landscape. This elevated role of streams and rivers in releasing terrestrial carbon to the atmosphere is believed to result from a disproportional transfer of terrestrial carbon (both organic and gaseous) to the inland waters. Correlations between riverine carbon emissions and areal extent of the flowing waters suggest a hydrology-driven mediation of terrestrial carbon release by streams and rivers.

Keywords: earth and environment journals; environment journals; open access environment journals; peer reviewed environmental journals; open access; juniper publishers; ournal of Environmental Sciences; juniper publishers journals; juniper publishers reivew (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:adp:ijesnr:v:19:y:2019:i:2:p:50-54

DOI: 10.19080/IJESNR.2019.19.556010

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