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Effects of coastal marsh conversion to shrimp aquaculture ponds on CH4 and N2O emissions
Fujian Normal University, Peoples R China.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
Chinese University of Hong Kong, Peoples R China.
Fujian Normal University, Peoples R China.
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2017 (English)In: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, Vol. 199, p. 125-131Article in journal (Refereed) Published
Abstract [en]

In this study, we compared the CH4 and N2O fluxes from a tidal brackish Cyperus malaccensis marsh ecosystem and nearby shrimp ponds, converted from C malaccensis marsh in the last 3-4 years, in the Min River estuary of southeast China over the aquaculture period of the year. Significant differences in CH4 and N2O fluxes were observed in space (between brackish marsh and shrimp ponds) and in time (between sampling occasions that were distributed over the aquaculture period). CH4 fluxes from the shrimp ponds were on an average 10-fold higher than from the brackish marsh. N2O emissions, on the other hand, were lower from the shrimp pond (25% of the emissions from the brackish marsh). Accessory data indicates that these patterns were primarily linked to water level variability and temperature (all fluxes), sediment porewater sulfate concentrations (CH4 flux) and total nitrogen concentrations (N2O flux). Our research demonstrates that the coastal marsh ecosystem converted to aquaculture ponds considerably alter emissions of CH4 and N2O and provides input to the global discussion on how to account for emissions from various types of flooded land in greenhouse gas inventories. (C) 2017 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD , 2017. Vol. 199, p. 125-131
Keyword [en]
Land-use conversion; Methane; Nitrous oxide; Tidal marsh; Shrimp pond; Anthropogenic influence
National Category
Oceanography, Hydrology and Water Resources
Identifiers
URN: urn:nbn:se:liu:diva-143354DOI: 10.1016/j.ecss.2017.09.023ISI: 000415776100012OAI: oai:DiVA.org:liu-143354DiVA: diva2:1162804
Note

Funding Agencies|National Science Foundation of China [41671088, 41371127]; Program for Innovative Research Team of Fujian Normal University [IRTL1205]; National Basic Scientific and Technological Work [2013FY111805]; Swedish Council VR; Linkoping University; European Research Council ERC [725546]

Available from: 2017-12-05 Created: 2017-12-05 Last updated: 2018-01-13

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Tema Environmental ChangeFaculty of Arts and Sciences
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