Comparative Assessment of Grassland NPP Dynamics in Response to Climate Change in China, North America, Europe and Australia from 1981 to 2010

被引：83

作者：

Gang, C. ^{[1
]}

Zhou, W. ^{[1
]}

Wang, Z. ^{[1
]}

Chen, Y. ^{[1
]}

Li, J. ^{[1
]}

Chen, J. ^{[2
]}

Qi, J. ^{[3
]}

Odeh, I. ^{[4
]}

Groisman, P. Y. ^{[5
]}

机构：

[1] Nanjing Univ, Coll Life Sci, Global Change Res Inst, Nanjing 210093, Jiangsu, Peoples R China

[2] Univ Toronto, Dept Geog, Toronto, ON M5S 1A1, Canada

[3] Michigan State Univ, Ctr Global Change & Earth Observat, E Lansing, MI 48824 USA

[4] Univ Sydney, Fac Agr & Environm, Dept Environm Sci, Sydney, NSW 2006, Australia

[5] NOAA Natl Climat Data Ctr NCDC, Asheville, NC USA

来源：

JOURNAL OF AGRONOMY AND CROP SCIENCE | 2015年 / 201卷 / 01期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

correlation coefficients; grassland ecosystems; mean NPP; non-woody grasslands; total NPP; NET PRIMARY PRODUCTION; VARIABILITY; TRENDS; PRODUCTIVITY; TEMPERATURE; RAINFALL; COVER;

D O I：

10.1111/jac.12088

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Although climate change has been modifying grassland ecosystems for a long time, few studies on grassland ecosystems have focused on large-scale responses to climate change. Hence, grassland net primary productivity (NPP) from 1981 to 2010, as well as its variations in China, North America, Europe and Australia, was assessed and compared using a synthetic model in this study. Subsequently, the correlations between the NPP of each grassland type and climate factors were evaluated to reveal the responses of grassland eco-systems to climate change. The results showed that North America, which has the largest area of grassland ecosystems, exhibits maximum grassland NPP of 4225.30 +/- 215.43 Tg DW year(-1), whereas Europe, which has the least area of grassland ecosystems among the four regions, exhibits minimum grassland NPP of 928.95 +/- 24.68 Tg DW year(-1). Grassland NPP presented an increasing trend in China and Australia, but decreasing in Europe and North America from 1981 to 2010. In addition, grassland NPP is positively correlated with mean annual precipitation, but demonstrates notable differences with mean annual temperature. In conclusion, climate change has a significant role in explaining the spatiotemporal patterns of and the variations in grassland NPP in the four regions.

引用

页码：57 / 68

页数：12

共 43 条

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[43]

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