干旱区生态环境知识资源中心(Arid): 气候变化和人类活动对中国北方农牧交错区草地净初级生产力的影响

Arid

	气候变化和人类活动对中国北方农牧交错区草地净初级生产力的影响
其他题名	Impacts of climate change and human activities on net primary productivity of grassland in agro-pastoral transitional zone in northern China
	杜金燊; 于德永
来源期刊	北京师范大学学报. 自然科学版
ISSN	0476-0301
出版年	2018
卷号	54 期号:3 页码:365-372
中文摘要	中国北方农牧交错区位于内蒙古高原东南边缘和黄土高原北部,生态系统脆弱,对气候变化敏感,草地是该区域的主体生态系统类型,在气候变化和人类活动影响下易发生退化.如何区分气候变化和人类活动对草地生产力的影响还有待于深入研究.本文利用CASA模型和Thornthwaite纪念模型分别模拟20002015年草地实际净第一性生产力(net primary productivity,NPP)和潜在NPP,草地潜在NPP与实际NPP的差值代表人类活动对NPP的影响.结果表明,20002015年间42.29%的草地处于退化状态,57.71%的草地处于恢复状态.其中18.46%和7.39%的草地分别受到气候变化和放牧等人类活动的影响发生退化;在气候变化、人类活动以及二者的共同作用下,分别有7.51%、 30.26%和19.94%的草地处于恢复状态.因此,20002015年间,气候变化是退化草地区域NPP变化的主要驱动力,生态建设等人类活动是恢复草地区域NPP变化的主要驱动因素.
英文摘要	The agro-pastoral transitional zone in north China is located in arid and semi-arid areas.The ecosystem is fragile and sensitive to climate changes.Grassland is the main type of ecosystem in this region. Under the influence of climate change and human activities,grassland is prone to degradation.How to distinguish climate change and impact of human activities on grassland productivity needs to be further studied. CASA model and Thornthwaite memorial model were used here to simulate actual net primary productivity (NPP)and potential NPP of grassland from 2000-2015.Difference between potential NPP and actual NPP in grassland was found to represent the effect of human activities.42.29% of grassland was found to be in a degraded state from 2000-2015,57.71%of grassland was in a restored state,18.46%and 7.39%of grassland were degraded due to climate change and grazing(human activities)respectively.Under impacts of climate change and human activities and a combination of both,7.51%,30.26%and 19.94% of grassland were in a restored state respectively.Therefore,climate change is the main driver of NPP changes in degraded grassland, and ecological restoration policy is the main driver of NPP changes in restored grassland from 2000-2015.
中文关键词	农牧交错带 ; 气候变化 ; 人类活动 ; 草地退化
英文关键词	agro-pastoral transitional zone climate change human activity grassland degradation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6278927
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237283
作者单位	人与环境系统可持续研究中心,北京师范大学地理科学学部, 地表过程与资源生态国家重点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	杜金燊,于德永. 气候变化和人类活动对中国北方农牧交错区草地净初级生产力的影响[J]. 北京师范大学,2018,54(3):365-372.
APA	杜金燊,&于德永.(2018).气候变化和人类活动对中国北方农牧交错区草地净初级生产力的影响.北京师范大学学报. 自然科学版,54(3),365-372.
MLA	杜金燊,et al."气候变化和人类活动对中国北方农牧交错区草地净初级生产力的影响".北京师范大学学报. 自然科学版 54.3(2018):365-372.