Why are Arctic shrubs becoming more nitrogen limited?
Why are Arctic shrubs becoming more nitrogen limited?
复制标题
为什么北极灌木的氮含量越来越有限?
DOI:
10.1111/nph.17841
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发表时间:
2021
期刊:
影响因子:
9.4
通讯作者:
Street L
中科院分区:
文献类型:
--
作者:
Street L
The Arctic tundra is becoming more productive, with further significant change expected over the coming decades. Biome-scale increases in Arctic plant productivity have, at least partly, been attributed to the expansion of tall woody shrubs (Mekonnen et al., 2021a). Increasing productivity and shrub abundance will have profound consequences: from influencing surface energy balance and permafrost stabilization, to altered forage provision for herbivores, to determining the strength of global carbon (C) cycle–climate feedbacks from warming permafrost soils. Though there is solid evidence for increasing tundra productivity at the biome scale, the picture on the ground is more complicated. Plant growth has increased over time in some regions but not others, for reasons that are not fully understood–growth could be responding to a large number of interrelated factors as the Arctic warms. Some of these factors are unique to high-latitude environments; for example, the lengthening of the short snow-free growing season or enhanced nutrient release from thawing permafrost soils. Others are global, including rising atmospheric CO2 concentrations or the direct effects of warming on tissue growth rates. In a new study recently published in New Phytologist, Martin et al.(2021; doi: 10. 1111/nph. 17529) presented dendroecological data that challenges our understanding of the links between Arctic environmental change and plant growth.
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影响因子:
4.8
作者:
CHAPIN, FS;SHAVER, GR;LAUNDRE, JA
通讯作者:
LAUNDRE, JA
影响因子:
9.4
作者:
M. A. Dawes;F. Hagedorn;T. Zumbrunn;I. Handa;S. Hättenschwiler;S. Wipf;C. Rixen
通讯作者:
C. Rixen
影响因子:
64.8
作者:
OECHEL, WC;COWLES, S;VOURLITIS, G
通讯作者:
VOURLITIS, G
影响因子:
4.8
作者:
TISSUE, DT;OECHEL, WC
通讯作者:
OECHEL, WC