1954—2010年西南高山地区土壤碳储量时空动态及对气候变化的响应

被引:6
作者
顾峰雪 [1 ]
庞瑞 [2 ]
张远东 [2 ]
黄玫 [3 ]
李洁 [1 ]
郝卫平 [1 ]
梅旭荣 [1 ]
机构
[1] 中国农业科学院农业环境与可持续发展研究所,农业部旱作节水农业重点实验室
[2] 中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室
[3] 中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室
关键词
CEVSA模型; 土壤有机碳; 高山森林; 气候变化;
D O I
暂无
中图分类号
S153.62 []; P467 [气候变化、历史气候];
学科分类号
0903 ; 090301 ; 0706 ; 070601 ;
摘要
西南高山地区生态系统类型丰富、地形复杂,是响应全球气候变化的重点区域,对全球气候变化具有重要的指示作用。研究应用生态系统模型CEVSA(Carbon Exchange between Vegetation,Soil,and the Atmosphere)估算了1954—2010年西南高山地区土壤有机碳(Soil Organic Carbon,SOC)的时空变化,分析了其对气候变化的响应。结果表明:1西南高山地区1954—2010年平均土壤有机碳密度为14.16 kg C·m-2,在空间分布上,SOC密度自东南向西北递增,与温度显著负相关(r=-0.447,P<0.01),而与降水量相关性不显著;2西南高山地区1954—2010年SOC总量变动范围为6.95~7.64 Pg C,增加趋势显著(P<0.05),平均每年增加0.013 Pg C,土壤有机碳密度平均增加26.94 g C·m-2;3常绿针叶林、常绿阔叶林和草地SOC密度增加趋势均显著,除常绿阔叶林SOC密度与温度相关性不显著外,其他两种植被类型SOC都与年平均温度显著正相关(草地:r=0.527,P<0.01;常绿针叶林:r=0.501,P<0.01),且3种植被类型SOC与年降水量均相关性不显著;4由于作为土壤有机碳输入的凋落物产生量对温度不如异养呼吸敏感,所以未来升温条件下,土壤有机碳储量的增速减缓或者呈下降趋势。
引用
收藏
页码:1930 / 1943
页数:14
相关论文
共 57 条
[41]   Positive feedback between future climate change and the carbon cycle [J].
Friedlingstein, P ;
Bopp, L ;
Ciais, P ;
Dufresne, JL ;
Fairhead, L ;
LeTreut, H ;
Monfray, P ;
Orr, J .
GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (08) :1543-1546
[42]   Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model [J].
Cox, PM ;
Betts, RA ;
Jones, CD ;
Spall, SA ;
Totterdell, IJ .
NATURE, 2000, 408 (6809) :184-187
[43]   Will changes in soil organic carbon act as a positive or negative feedback on global warming? [J].
Kirschbaum, MUF .
BIOGEOCHEMISTRY, 2000, 48 (01) :21-51
[44]  
A Global Terrestrial Monitoring Network Integrating Tower Fluxes, Flask Sampling, Ecosystem Modeling and EOS Satellite Data[J] . S.W. Running,D.D. Baldocchi,D.P. Turner,S.T. Gower,P.S. Bakwin,K.A. Hibbard.Remote Sensing of Environment . 1999 (1)
[45]   Dynamic responses of terrestrial ecosystem carbon cycling to global climate change [J].
Cao, MK ;
Woodward, FI .
NATURE, 1998, 393 (6682) :249-252
[46]   Net primary and ecosystem production and carbon stocks of terrestrial ecosystems and their responses to climate change [J].
Cao, MK ;
Woodward, FI .
GLOBAL CHANGE BIOLOGY, 1998, 4 (02) :185-198
[47]  
The CO<sub>2</sub> Dependence of Photosynthesis, Plant Growth Responses to Elevated Atmospheric CO<sub>2</sub> Concentrations and Their Interaction with Soil Nutrient Status. I. General Principles and Forest Ecosystems[J] . Functional Ecology . 1996 (1)
[48]   A GLOBAL LAND PRIMARY PRODUCTIVITY AND PHYTOGEOGRAPHY MODEL [J].
WOODWARD, FI ;
SMITH, TM ;
EMANUEL, WR .
GLOBAL BIOGEOCHEMICAL CYCLES, 1995, 9 (04) :471-490
[49]  
The temperature dependence of soil organic matter decomposition, and the effect of global warming on soil organic C storage[J] . Miko U.F. Kirschbaum.Soil Biology and Biochemistry . 1995 (6)
[50]  
Climatic, edaphic, and biotic controls over storage and turnover of carbon in soils[J] . David S. Schimel,B. H. Braswell,Elisabeth A. Holland,Rebecca McKeown,D. S. Ojima,Thomas H. Painter,William J. Parton,Alan R. Townsend.Global Biogeochemical Cycles . 1994 (3)