干旱区生态环境知识资源中心(Arid): 全球陆地生态系统光合作用与呼吸作用的温度敏感性

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	全球陆地生态系统光合作用与呼吸作用的温度敏感性
其他题名	Temperature sensitivity of photosynthesis and respiration in terrestrial ecosystems globally
	游桂莹 1; 张志渊 2; 张仁铎 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2018
卷号	38 期号:23 页码:8392-8399
中文摘要	基于全球647套通量数据,定量分析了全球尺度下生态系统光合作用和呼吸作用的温度敏感性(Q_(10))随纬度、气候和植被的分布规律。结果表明:在全球尺度下,光合作用和呼吸过程的温度敏感性(Q_(10,G)和Q_(10,R))都随纬度的升高而增加,其中Q_(10,G)和Q_(10,R)的均值分别为3.990.21和2.280.074。除热带多树草原、常绿落叶林外,Q_(10,G)均大于Q_(10,R)值。不同植被类型的温度敏感性存在显著性差异,表现为:针叶林>阔叶林;落叶林>常绿林,其中生态系统的季节性变异是造成差异的主要原因。当植被类型和纬度区域共同影响Q_(10)值时,植被类型对Q_(10)值的总变异贡献更大。气候类型对Q_(10,G)和Q_(10,R)都有显著影响。在气候带上,干旱带的Q_(10,G)最小,而冷温带的Q_(10,G)最高。不同气候类型下(除温带草原气候外)的Q_(10,G)都大于Q_(10,R)。在极端条件下,温度可能不在是主导因素,而水分对温度敏感性的影响不可忽略。
英文摘要	Based on 647 datasets of eddy covariance fluxes across the world,we analyzed the relationships of the temperature sensitivity (Q_(10)) values of photosynthesis (Q_(10,G)) and respiration (Q_(10,R)) processes of the terrestrial ecosystems with latitude,climate types,and plant functional types.Our results showed that both Q_(10,G) and Q_(10,R) increased with latitude;Q_(10,G) and Q_(10,R) values were 3.99 0.21 and 2.28 0.074,respectively.Except woody savannas,for most of plant functional types,Q_(10,G) values were higher than Q_(10,R) values.Temperature sensitivity of ecosystem respiration and photosynthesis differed across plant functional types,which is mainly caused by variation in seasonality.Both Q_(10,G) and Q_(10,R) values of ecosystems in coniferous forests were greater than those in broad-leaved forests were,and these values were higher in deciduous forests than in evergreen forests.Two-way analysis of variance of Q_(10) among the latitude and plant functional types revealed that plant functional types contributed the most to the total variation of Q_(10).Both Q_(10,G) and Q_(10,R) were affected by climate types.Among the climatic zones,the lowest Q_(10,G) value was found in the arid region,whereas the largest was obtained in cold-temperate region.Except for temperate grasslands,photosynthesis was more sensitive to temperature than respiration was among different climate types.Under extreme conditions,temperature may not be the dominant factor,whereas the effect of soil water content should not be ignored.Further studies are needed to investigate the response of temperature sensitivity of ecosystem respiration to the variation in water availability.
中文关键词	光合作用 ; 呼吸作用 ; 纬度 ; 植被类型 ; 气候类型
英文关键词	Q_(10) photosynthesis respiration Q_(10) latitude plant functional types climate types
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6390512
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238167
作者单位	1.中山大学环境科学与工程学院, 广东省环境污染控制与修复重点实验室, 广州, 广东 511400, 中国; 2.福建农林大学资源与环境学院, 福州, 福建 350002, 中国
推荐引用方式 GB/T 7714	游桂莹,张志渊,张仁铎. 全球陆地生态系统光合作用与呼吸作用的温度敏感性[J],2018,38(23):8392-8399.
APA	游桂莹,张志渊,&张仁铎.(2018).全球陆地生态系统光合作用与呼吸作用的温度敏感性.生态学报,38(23),8392-8399.
MLA	游桂莹,et al."全球陆地生态系统光合作用与呼吸作用的温度敏感性".生态学报 38.23(2018):8392-8399.