DOI: 10.1016/j.atmosenv.2014.10.047
Scopus记录号: 2-s2.0-84910018165
论文题名: Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period
作者: Hu Q ; , Wu Q ; , Yao B ; , Xu X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 100 起始页码: 124
结束页码: 132
语种: 英语
英文关键词: Carbon sink
; Carex meadow
; Ecosystem respiratory component
; Poyang lake
; Temperature sensitivity
Scopus关键词: Carbon
; Carbon dioxide
; Floods
; Lakes
; Soil moisture
; Carbon sink
; Carex meadow
; Ecosystem respiration
; Environmental factors
; Microbial respiration
; Po-yang lakes
; Respiratory activity
; Temperature sensitivity
; Ecosystems
; carbon sink
; drawdown
; ecosystem dynamics
; environmental factor
; growing season
; intertidal environment
; meadow
; microbial activity
; monocotyledon
; soil moisture
; soil respiration
; temperature gradient
; temporal variation
; air temperature
; Article
; carbon balance
; carbon sink
; Carex meadow
; controlled study
; ecosystem
; ecosystem respiration
; environmental factor
; grassland
; growing season
; lake
; microbial respiration
; nonhuman
; root respiration
; seasonal variation
; soil moisture
; soil respiration
; soil temperature
; temperature sensitivity
; China
; Jiangxi
; Poyang Lake
; Carex
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Little 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 1359.25mg CO2 m-2h-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 Q10 values ranged from 1.72 to 2.51, with the maximum for shoot respiration and the minimum for microbial respiration. In addition, the Q10 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 0.17-0.59TgCyr-1. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82109
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, No. 99, Ziyang Road, Nanchang, China; Key Laboratory of Ecosystem Network Observation and Modelling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A, Datun Road, Chaoyang District, Beijing, China; Science and Technology College, Jiangxi Normal University, 437, Beijing Road, Nanchang, China
Recommended Citation:
Hu Q,, 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,2015-01-01,100