Impacts of abiotic and biotic factors on tundra productivity near Utqiaġvik, Alaska
Impacts of abiotic and biotic factors on tundra productivity near Utqiaġvik, Alaska
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非生物和生物因素对阿拉斯加乌特恰维克附近苔原生产力的影响
DOI:
10.1088/1748-9326/acf7d6
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发表时间:
2023
影响因子:
6.7
通讯作者:
Hu, Tongxi
中科院分区:
文献类型:
--
作者:
Zhang, Qingyuan;Zhang, Xuesong;Lara, Mark J.;Li, Zhengpeng;Xiao, Jingfeng;Zhao, Kaiguang;Hu, Tongxi
Earlier snowmelt, warmer temperatures and herbivory are among the factors that influence high-latitude tundra productivity near the town of Utqiaġvik in northern Alaska. However, our understanding of the potential interactions between these factors is limited. MODIS observations provide cover fractions of vegetation, snow, standing water, and soil, and fractional absorption of photosynthetically active radiation by canopy chlorophyll (fAPAR chl) per pixel. Here, we evaluated a recent time-period (2001–2014) that the tundra experienced large interannual variability in vegetation productivity metrics (ie fAPAR chl and APAR chl), which was explainable by both abiotic and biotic factors. We found earlier snowmelt to increase soil and vegetation cover, and productivity in June, while warmer temperatures significantly increased monthly productivity. However, abiotic factors failed to explain stark decreases in productivity during August of 2008, which coincided with a severe lemming outbreak. MODIS observations found this tundra ecosystem to completely recover two years later, resulting in elevated productivity. This study highlights the potential roles of both climate and herbivory in modulating the interannual variability of remotely retrieved plant productivity metrics in Arctic coastal tundra ecosystems.
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影响因子:
5.2
作者:
Jia, GSJ;Epstein, HE;Walker, DA
通讯作者:
Walker, DA
影响因子:
13.5
作者:
F. Zhao;Chengquan Huang;S. Goward;K. Schleeweis;K. Rishmawi;Mary A. Lindsey;Elaine Denning;Louis Keddell;W. Cohen;Zhiqiang Yang;J. Dungan;A. Michaelis
通讯作者:
A. Michaelis
影响因子:
3.7
作者:
Andresen, Christian G.;Lougheed, Vanessa L.
通讯作者:
Lougheed, Vanessa L.
影响因子:
5.2
作者:
Xiaoyang Zhang;Yu Shen;Shuai Gao;Weile Wang;C. Schaaf
通讯作者:
C. Schaaf
DOI:
10.1002/9781118470596.ch2
发表时间:
2012
期刊:
arXiv: Analysis of PDEs
影响因子:
--
作者:
W. Vincent;I. Laurion;R. Pienitz;K. W. Anthony
通讯作者:
K. W. Anthony