Lowland tundra plant stoichiometry is somewhat resilient decades following fire despite substantial and sustained shifts in community structure
Lowland tundra plant stoichiometry is somewhat resilient decades following fire despite substantial and sustained shifts in community structure
复制标题
尽管群落结构发生了实质性和持续性的变化,低地苔原植物化学计量在火灾发生后几十年仍具有一定的弹性
DOI:
10.1080/15230430.2022.2121246
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Sistla, Seeta A.
中科院分区:
文献类型:
--
作者:
Baillargeon, Natalie;Pold, Grace;Natali, Susan M.;Sistla, Seeta A.
The Arctic is experiencing the greatest increase in average surface temperature globally, which is projected to amplify wildfire frequency and severity. Wildfire alters the biogeochemical characteristics of arctic ecosystems. However, the extent of these changes over time—particularly with regard to plant stoichiometries relative to community structure—is not well documented. Four years after the Yukon-Kuskokwim Delta, Alaska, experienced its largest fire season, aboveground plant and lichen biomass was harvested across a gradient of burn history: unburned (“reference”), 2015 burn (“recent burn”), and 1972 burn (“historic burn”) to assess the resilience of tundra plant communities to fire disturbance. Fire reduced aboveground biomass in the recent burn; early recovery was characterized by evergreen shrub and graminoid dominance. In the historic burn, aboveground biomass approached reference conditions despite a sustained reduction of lichen biomass. Although total plant and lichen carbon (C) and nitrogen (N) were reduced immediately following fire, N stocks recovered to a greater degree—reducing community-level C:N. Notably, at the species level, N enrichment was observed only in the recent burn. Yet, community restructuring persisted for decades following fire, reflecting a sustained reduction in N-poor lichens relative to more N-rich vascular plant species.
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DOI:
10.2328/jnds.33.71
发表时间:
2012
期刊:
Journal of Natural Disaster Science
影响因子:
--
作者:
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通讯作者:
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影响因子:
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作者:
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10.1
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Naylor, Rosamond L.
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
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