滨海沼泽湿地转化为养殖塘对其碳储量的影响

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Abstract In order to scientifically assess the impact of land use/land cover changes on blue carbon pool of coastal tidal marsh, it is valuable to determine the changes of ecosystem carbon stock following conversion of coastal marsh to aquaculture ponds. In the Minjiang River estuary zone, we collected the samples of the aboveground and belowground plants, and the soils (0~100cm) from the Phragmites australis, Cyperus malatensis and Spartina alterniflora marshes, and the top 100cm sediment of the aquaculture ponds reclaimed from above three different marshes. The organic carbon content of plants, and soil / sediment samples were measured. The blue carbon storage of P.australis marsh ecosystem, C.malaccensis marsh ecosystem and S.alterniflora marsh ecosystem was (152.85±8.88), (151.63±6.33), and (155.85±10.82)Mg C/hm², respectively, and the sediment carbon storage of the aquaculture ponds was (112.69±4.26),(128.24±15.81), and (118.59±8.26)Mg C/hm², respectively. The blue carbon storage of P.australis marsh ecosystem, C.malaccensis marsh ecosystem and S.alterniflora marsh ecosystem decreased by 26.3%, 15.4%, and 23.9%, respectively, resulting in (145.49±33.00), (120.66±26.49), and (136.76±27.61)Mg CO₂-eq/hm² carbon emissions. Our results showed that conversion of coastal marsh into aquaculture ponds greatly decreased ecosystem carbon storage. We suggested that ecological restoration of aquaculture pond into marsh ecosystem will play an important role in coastal wetland carbon sequestration.

Key words： tidal marsh aquaculture pond carbon stock carbon loss Min River estuary

Received: 11 August 2021

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X131

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	CAO Qiong
	HUANG Jia-fang
	LUO Min
	TAN Ji
	TONG Chuan

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CAO Qiong,HUANG Jia-fang,LUO Min等. Effect of conversion of coastal marsh into aquaculture ponds on ecosystem carbon stocks in the Min River estuary[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1335-1345.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I3/1335

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