干旱区生态环境知识资源中心(Arid): Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture

Arid

	Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture
其他题名	定量评估气候变化和人类活动对阿勒泰地区草地净初级生产力的影响
	Tian Jie; Xiong Junnan; Zhang Yichi; Cheng Weiming; He Yuchuan; Ye Chongchong; He Wen
来源期刊	Journal of Resources and Ecology
ISSN	1674-764X
出版年	2021
卷号	12 期号:6 页码:743-756
中文摘要	阿勒泰地区的草地退化严重阻碍了当地经济的可持续发展和畜牧业的稳定运行,如今受到了广泛的关注。而气候变化和人类活动被认为是草原退化的主要诱因,定量评估气候变化和人类活动对草地变化的相对作用,对于探究草地退化机制和控制草地退化具有重要意义。本文采用Carnegie-Ames-Stanford Approach和Thornthwaite memorial模型,模拟了2000-2019年阿勒泰地区的实际(NPP_A)和潜在净初级生产力(NPP_P),并采用两者之差来反映人类活动对草地净初级生产力的相对作用(NPP_H)。在此基础上,我们利用皮尔逊相关系数验证了模拟NPP的可行性,探究阿勒泰地区草地净初级生产力的时空变化,并构建综合情景以定量评估气候变化和人类活动对草地变化的相对作用。结果表明:(1)本文模拟的NPP_A与MOD17A3数据集在空间分布上具有高度一致性;(2)NPP_A增加的地区占总面积的70.53%,而NPP_A减少的地区则为总面积的29.47%。研究期间,NPP_A呈现出轻微的增加趋势(0.83 g C m~(-2) yr~(-1)),而NPP_P和NPP_H则呈现出下降趋势(-1.31和-2.15 g C m~(-2) yr~(-1));(3)人类活动在草地恢复过程中起到了关键作用,人类活动促进了66.98%的区域发生恢复。气候变化则是导致草原退化的主要原因,导致55.70%的草地退化。这些结果可以揭示气候变化和人类活动所引起的草地变化机制,并进一步应用于制定阿勒泰地区防治荒漠化的有效措施。
英文摘要	Grassland degradation in Altay Prefecture is of considerable concern as it is a threat that hinders the sustainable development of the local economy and the stable operation of the livestock industry.Quantitative assessment of the relative contributions of climate change and human activities, which are considered as the dominant triggers of grassland degradation, to grassland variation is crucial for understanding the grassland degradation mechanism and mitigating the degraded grassland in Altay Prefecture.In this paper, the Carnegie-Ames-Stanford Approach model and the Thornthwaite memorial model were adopted to simulate the actual net primary productivity(NPP_A)and potential net primary productivity(NPP_P)in the Altay Prefecture from 2000 to 2019.Meanwhile, the difference between potential NPP and actual NPP was employed to reflect the effects of human activities(NPP_H)on the grassland.On this basis, we validated the viability of the simulated NPP using the Pearson correlation coefficient,investigated the spatiotemporal variability of grassland productivity, and established comprehensive scenarios to quantitatively assess the relative roles of climate change and human activities on grassland in Altay prefecture.The results indicate three main points.(1)The simulated NPP_A was highly consistent with the MOD17A3 dataset in spatial distribution.(2)Regions with an increased NPP_A accounted for 70.53% of the total grassland,whereas 29.47% of the total grassland area experienced a decrease.At the temporal scale, the NPP_A presented a slightly increasing trend(0.83 g C m~(-2) yr~(-1))over the study period, while the trends of NPP_P and NPP_H were reduced(-1.31 and-2.15 g C m~(-2) yr~(-1)).(3)Compared with climate change, human activities played a key role in the process of grassland restoration, as 66.98% of restored grassland resulted from it.In contrast, inter-annual climate change is the primary cause of grassland degradation, as it influenced 55.70% of degraded grassland.These results could shed light on the mechanisms of grassland variation caused by climate change and human activities,and they can be applied to further develop efficient measures to combat desertification in Altay Prefecture.
中文关键词	草地退化 ; 植被净初级生产力 ; 气候变化 ; 人类活动 ; 阿勒泰地区
英文关键词	grassland degradation net primary productivity climate change human activities Altay Prefecture
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7037040
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377463
作者单位	Tian Jie, School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan 610500, China.; Xiong Junnan, School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan 610500, China.; He Yuchuan, School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan 610500, China.; Ye Chongchong, School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan 610500, China.; He Wen, School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan 610500, China.; Zhang Yichi, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Water Cycle & Related Land Surface Processes, Chinese Academy of Sciences, Beijing 100101, China.; Cheng Weiming, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences;;University of Chinese Academy of Sciences;;Jiangsu Center for Collaborative Innovation in...
推荐引用方式 GB/T 7714	Tian Jie,Xiong Junnan,Zhang Yichi,et al. Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture[J],2021,12(6):743-756.
APA	Tian Jie.,Xiong Junnan.,Zhang Yichi.,Cheng Weiming.,He Yuchuan.,...&He Wen.(2021).Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture.Journal of Resources and Ecology,12(6),743-756.
MLA	Tian Jie,et al."Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture".Journal of Resources and Ecology 12.6(2021):743-756.