Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period
Hu, QW; Wu, Q; Yao, B; Xu, XL
2015
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
Volume100Pages:124-132
AbstractLittle is known about the components of ecosystem respiration from a subtropical littoral wetland with dramatic annual inundation dynamics. In this study, we investigated ecosystem respiration and its components in a Poyang lake Carex meadow during the drawdown periods from May 2009 to June 2011. Both ecosystem respiration and its components showed clear temporal variation pattern, with temperature being the dominant control. Ecosystem respiration ranged from 98.01 to 1359.25 mg CO2 m(-2) h(-1). Shoot and root respiration contributed approximately 36% and 26% to the ecosystem respiration, respectively, whereas microbial respiration accounted for 38% of the ecosystem respiration. The ratio of total soil respiration to ecosystem respiration varied from 0.45 to 0.90, depending on growing season stages. Their Q(10) values ranged from 1.72 to 2.51, with the maximum for shoot respiration and the minimum for microbial respiration. In addition, the Q(10) values varied with time and among ecosystem respiratory components and hence could not be treated as a constant. None of the respiration measurements was significantly related to soil moisture, suggesting that soil moisture was not a limiting environmental factor for respiratory activity during the drawdown periods in this meadow. The Carex meadow acted as strong carbon sink during the drawdown periods due to double growing seasons, but the previous summer flood duration could substantially alter carbon sink intensity in the following drawdown period. The total carbon sink of the littoral zone of Poyang Lake during drawdown periods was estimated to be 0.17-0.59 Tg C yr(-1). (C) 2014 Elsevier Ltd. All rights reserved.
SubtypeJournal
KeywordPoyang lake Carex meadow Ecosystem respiratory component Temperature sensitivity Carbon sink
Subject AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS Subject ExtendedEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS KeywordQINGHAI-TIBETAN PLATEAU ; SOIL ORGANIC-MATTER ; CARBON-DIOXIDE ; TEMPERATURE SENSITIVITY ; RHIZOSPHERE RESPIRATION ; METHANE EMISSIONS ; LITTORAL-ZONE ; CO2 EFFLUX ; MICROBIAL CONTRIBUTIONS ; NORTHERN PEATLAND
Indexed BySCI
Language英语
WOS IDWOS:000347266700016
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44475
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Hu, QW,Wu, Q,Yao, B,et al. Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period[J]. ATMOSPHERIC ENVIRONMENT,2015,100:124-132.
APA Hu, QW,Wu, Q,Yao, B,&Xu, XL.(2015).Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period.ATMOSPHERIC ENVIRONMENT,100,124-132.
MLA Hu, QW,et al."Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period".ATMOSPHERIC ENVIRONMENT 100(2015):124-132.
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