Effects of small-scale patchiness of alpine grassland on ecosystem carbon and nitrogen accumulation and estimation in northeastern Qinghai-Tibetan Plateau

文献类型： 外文期刊

第一作者： Qin, Yu

作者： Qin, Yu;Yi, Shuhua;Ding, Yongjian;Xu, Gaowei;Chen, Jianjun;Wang, Zhiwei;Yi, Shuhua;Ding, Yongjian;Chen, Jianjun;Wang, Zhiwei

作者机构：

关键词： Patchiness;Ecosystem C;Ecosystem N;Alpine grassland;The Qinghai-Tibetan Plateau

期刊名称：GEODERMA （ 影响因子：6.114； 五年影响因子：6.183 ）

ISSN： 0016-7061

年卷期： 2018 年 318 卷

页码：

收录情况： SCI

摘要： Small-scale patchiness intensified the spatial heterogeneous distribution of soil and vegetation organic carbon (C) and total nitrogen (N), thereby inducing large uncertainty in estimating ecosystem C and N stocks. However, patchiness at this scale was difficult to identify by satellite remote sensing and measure in situ. Aerial photographing can provide high-precision images and can potentially improve estimating accuracy in ecosystem C and N stocks. In this study, using combined methods of field sampling, aerial photographing and satellite images, we investigated the characteristics of patchiness, quantified ecosystem C and N stocks in different patches at plot scale (similar to 1000 m(2)) and eventually estimated the uncertainty in ecosystem C and N stocks caused by small-scale patchiness at basin scale. Results showed that: 1) mosaic of vegetation and bald patches coexisted for swamp meadow and alpine meadow, whereas vegetation presented as spot for steppe meadow and alpine steppe; 2) average ecosystem respiration, C and N stocks in intact grassland patches were 2.05 and 1.65, 1.66 and 1.65, 2.01 and 1.69 times higher than those of large and medium bare patches (P < 0.05); and 3) neglecting the bare patches caused approximate 30%, 15% and 10% overestimation in estimations of ecosystem C emission, C and N stocks. We concluded that small-scale patchiness would result in ecosystem C loss due to decreasing in C input from vegetation and increasing in C output from soil erosion. Our study suggested that integration of field sampling, aerial photographing and satellite images could improve precision in estimation of ecosystem C emission, C and N stocks at basin scale.

分类号：

  • 相关文献

[1]Asynchrony among local communities stabilises ecosystem function of metacommunities. Wilcox, Kevin R.,Luo, Yiqi,Souza, Lara,Tredennick, Andrew T.,Tredennick, Andrew T.,Koerner, Sally E.,Grman, Emily,Hallett, Lauren M.,Hallett, Lauren M.,Avolio, Meghan L.,La Pierre, Kimberly J.,Houseman, Gregory R.,Isbell, Forest,Johnson, David Samuel,Alatalo, Juha M.,Baldwin, Andrew H.,Bork, Edward W.,Boughton, Elizabeth H.,Bowman, William D.,Bowman, William D.,Britton, Andrea J.,Cahill, James F., Jr.,Collins, Scott L.,Du, Guozhen,Zhang, Pengfei,Eskelinen, Anu,Eskelinen, Anu,Eskelinen, Anu,Gough, Laura,Jentsch, Anke,Kern, Christel,Klanderud, Kari,Knapp, Alan K.,Smith, Melinda D.,Kreyling, Juergen,Luo, Yiqi,Luo, Yiqi,McLaren, Jennie R.,Megonigal, Patrick,Onipchenko, Vladimir,Prevey, Janet,Price, Jodi N.,Robinson, Clare H.,Sala, Osvaldo E.,Sala, Osvaldo E.,Soudzilovskaia, Nadejda A.,Souza, Lara,Tilman, David,White, Shannon R.,Xu, Zhuwen,Yahdjian, Laura,Yu, Qiang,Zhang, Yunhai,Zhang, Yunhai. 2017

[2]Change of snow cover and its impact on alpine vegetation in the source regions of large rivers on the Qinghai-Tibetan Plateau, China. Wan, Yun-fan,Gao, Qing-zhu,Li, Yue,Qin, Xiao-bo,Ganjurjav,Zhang, Wei-na,Ma, Xin,Liu, Shuo,Wan, Yun-fan,Gao, Qing-zhu,Li, Yue,Qin, Xiao-bo,Ganjurjav,Zhang, Wei-na,Ma, Xin,Liu, Shuo.

[3]Spatio-temporal variation of alpine grassland spring phenological and its response to environment factors northeastern of Qinghai-Tibetan Plateau during 2000-2016. Li, Guangyong,Jiang, Guanghui,Li, Guangyong,Bai, Ju,Jiang, Cuihong. 2017

[4]Soil moisture and texture primarily control the soil nutrient stoichiometry across the Tibetan grassland. Tian, Liming,Zhao, Lin,Wu, Xiaodong,Zhao, Yonghua,Hu, Guojie,Yu, Guangyang,Zou, Defu,Tian, Liming,Zhao, Lin,Fang, Hongbing,Sheng, Yu,Wu, Jichun,Chen, Ji,Wang, Zhiwei,Li, Wangping,Ping, Chien-Lu,Shang, Wen,Zhao, Yuguo,Zhang, Ganlin,Tian, Liming. 2018

[5]Adaptation strategies of climate variability impacts on alpine grassland ecosystems in Tibetan Plateau. Gao, Qing-zhu,Li, Yue,Wan, Yun-fan,Gao, Qing-zhu,Li, Yue,Wan, Yun-fan,Xu, Hong-mei,Jiangcun, Wang-zha. 2014

[6]Differential response of alpine steppe and alpine meadow to climate warming in the central Qinghai-Tibetan Plateau. Ganjurjav, Hasbagan,Gao, Qingzhu,Liang, Yan,Cao, Xujuan,Zhang, Weina,Li, Wenhan,Wan, Yunfan,Li, Yue,Lin, Erda,Ganjurjav, Hasbagan,Gao, Qingzhu,Liang, Yan,Cao, Xujuan,Zhang, Weina,Li, Wenhan,Wan, Yunfan,Li, Yue,Lin, Erda,Gornish, Elise S.,Schwartz, Mark W.,Zhang, Yong,Danjiu, Luobu,Guo, Hongbao.

[7]Remote sensing monitoring the spatiotemporal changes of alpine grassland coverage in the Northern Tibet - art. no. 62982J. Gao Qingzhu,Li Yue,Wan Yunfan,Lin Erda,Sheng Wenping,Yang Kai. 2006

作者其他论文 更多>>

微信小程序