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Where Is the Carbon After Water Fluctuation in Riparian Zones? Changing from Carbon Source to Carbon Sink

Author(s): Qiuwen Chen

Linked Author(s): Qiuwen Chen

Keywords: Carbon source and sink; Flooding; Greenhouse gas emission; Riparian habitats;

Abstract: Riparian ecosystems are significant hotspots for greenhouse gas (GHG) fluxes. However, effects of water level fluctuation on the release or sequestration of GHG in riparian habitats has not been sufficiently addressed. Daily GHG fluxes (carbon dioxide (CO2), and methane (CH4)) were recorded along Lijiang River in southwest China using a static closed chamber technique, from April to October in 2014 with varying water levels. The vegetation and soil parameters were simultaneously measured as well. The results showed that average diel gaseous fluxes had significant variation between hours for both CO2 and CH4. The water fluctuation significantly affected CO2 emission from carbon source to carbon sink in both water and terrestrial habitats. The study allowed to identify potential biotic and abiotic drivers in gas release at different temporal scales, and enhanced understandings to gaseous fluxes in inland riparian habitats.

DOI: https://doi.org/10.3850/38WC092019-1470

Year: 2019

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