ISWC OpenIR  > 水保所知识产出(1956---)
近百年全球草地生态系统净初级生产力 时空动态对气候变化的响应
刚成诚1,2,3; 王钊齐3; 杨悦3; 陈奕兆3; 张艳珍3
2016
Source Publication草业学报
Volume25Issue:11Pages:1-14
Abstract

气候变化是影响生态系统空间地理分布、结构和功能的主要因素。为了从长时间序列大空间尺度上了解气
候变化对草地生态系统的影响及其反馈机制,本研究利用综合顺序分类法及分段模型分别模拟了1911-2010年
间全球草地生态系统及净初级生产力(NPP)的时空动态,并通过相关性分析揭示草地NPP对不同气候因子的响
应。结果表明,在过去的百年间,全球草地面积从1920s的5175.73万km2 下降到1990s的5102.16万km2,其中
冻原与高山草地类组的面积下降最多,为192.35万km2,荒漠草地类组、典型草地类组和温带湿润草地类组的面
积分别下降了14.31、34.15和70.81万km2,而热带萨王纳类组的面积增加了238.06万km2。在气候变化的影响
下,大多数草地类组的重心均向北方移动,在北半球尤为明显。全球草地NPP从1920s的25.93Pg DW/年增加到
1990s的26.67Pg DW/年。就各草地类组而言,冻原与高山草地类组、荒漠草地类组、典型草地类组、温带湿润草
地类组的NPP均呈现下降趋势,分别下降了709.57、24.98、115.74和291.56Tg DW/年,而热带萨王纳类组的
NPP则增加了1887.37Tg DW/年。从全球尺度来看,降水是影响草地NPP的主要气候因子。总的来说,近百年
气候变化对全球草地生态系统产生了深刻的影响,尽管草地NPP呈现增加的趋势,但暖湿化的气候变化对草地生
态系统的结构和空间分布产生了不利的影响。

Other Abstract

Climate change has a significant effect on the spatial distribution,structure and function of ecosystems.
To understand the effects and feedback mechanisms of climate change on a large spatial and temporal
scale,the distribution,shift ranges and net primary production(NPP)of grassland ecosystems across the globefrom 1911to 2010have been simulated using the Comprehensive Sequential Classification System(CSCS)and a
segmentation model.Correlation analysis was also conducted to reveal the responses of grassland types to different
climate variables.The results showed that the total global area of grassland ecosystems declined from
5175.73×104 km2 in the 1920sto 5102.16×104 km2 in the 1990s.The largest decrease,192.35×104 km2,occurred
in tundra &alpine steppe ecosystems.The areas of desert grassland,typical grassland and temperate
humid grassland decreased by 14.31,34.15and 70.81×104 km2 respectively,while tropical savanna expanded
by 238.06×104 km2.Climate warming forced most grasslands to shift northwards,particularly in the northern
hemisphere.Global grassland NPP increased from 25.93Pg DW/yr in the 1920sto 26.67Pg DW/yr in the
1990s.In terms of each grassland type,the NPP of the tundra and alpine steppe,desert grassland,typical
grassland and temperate humid grassland decreased by 709.57,24.98,115.74and 291.56Tg DW/yr respectively.
The NPP of tropical savanna increased by 1887.37Tg DW/yr.At the global scale,precipitation was the
dominant factor affecting grassland NPP.In general,grassland ecosystems have been substantially affected by
climate change over the past 100years.Although the global grassland NPP showed an overall increasing trend,
the structure and distribution of particular grassland ecosystems had been adversely affected by the warmer and
wetter climate.

Keyword草地生态系统 综合顺序分类法(cscs) 净初级生产力(npp) 时空动态 分段模型
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8643
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.中国科学院水利部水土保持研究所
3.南京大学生命科学学院
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
刚成诚,王钊齐,杨悦,等. 近百年全球草地生态系统净初级生产力 时空动态对气候变化的响应[J]. 草业学报,2016,25(11):1-14.
APA 刚成诚,王钊齐,杨悦,陈奕兆,&张艳珍.(2016).近百年全球草地生态系统净初级生产力 时空动态对气候变化的响应.草业学报,25(11),1-14.
MLA 刚成诚,et al."近百年全球草地生态系统净初级生产力 时空动态对气候变化的响应".草业学报 25.11(2016):1-14.
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