The influence of hydroclimate and management on forest regrowth across the western U.S
The influence of hydroclimate and management on forest regrowth across the western U.S
复制标题
水文气候和管理对美国西部森林再生的影响
DOI：
10.1088/1748-9326/abec03
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发表时间：
2021
影响因子：
6.7
通讯作者：
Johnson, Marie
中科院分区：
文献类型：
--
作者：
Hoylman, Zachary H;Jencso, Kelsey;Archer, Vince;Efta, James;Holden, Zachary A;Ballantyne, Ashley P;Johnson, Marie
森林受到一系列管理措施的制约，但尚不清楚在区域气候和复杂地形所产生的不均匀湿度梯度中，哪一种能产生最迅速的再生长率。我们以30米分辨率分析了美国西部26069个单独造林处理（林分）27年来的卫星反演净初级生产力（NPP）的恢复速率。年气候水分亏缺（8.59±5.07 gC m−2 yr−2，中位数±四分位差）的湿润景观的NPP恢复率和森林再生长率比干旱景观（3.97±2.67 gC m−2 yr−2）平均高116%。这一广泛的空间分析表明，水文气候是森林再生的主要驱动因素，其响应可能是高度非线性的，取决于当地气候条件。在水文气候条件下，造林处理的差异也强烈地控制着再生速率；林荫处理产生的小气候在干燥景观中使再生最大化，而在潮湿景观中，由于增强了能量可用性，砍伐后的再生速度最快。相反，商业间伐再生长率对水文气候不敏感，在整个美国西部相对一致。种植对不同水文气候的森林结构和再生长率有不同的影响，在潮湿环境中有负面影响，在干燥环境中有积极影响。总的来说，本研究提供了一种新的遥感方法来表征不同气候梯度的森林再生动态和常用的处理方案。
Forests are subject to a range of management practices but it is unclear which produce the most rapid rates of regrowth across heterogeneous moisture gradients produced by regional climate and complex terrain. We analyzed recovery rates of satellite derived net primary productivity (NPP) over 27 years for 26 069 individual silvicultural treatments (stands) across the western US at a 30 m resolution. Rates of NPP recovery and forest regrowth were on average 116% higher in wet landscapes with lower annual climatic water deficits (8.59±5.07 gC m− 2 yr− 2, median±inter-quartile range) when compared to dry landscapes (3.97±2.67 gC m− 2 yr− 2). This extensive spatial analysis indicates that hydroclimate is a dominant driver of forest regrowth and that responses can be highly nonlinear depending upon local climate conditions. Differences in silvicultural treatment also strongly controlled rates of regrowth within hydroclimatic settings; microclimates produced by shelterwood treatments maximized regrowth in dry landscapes whereas regrowth following clearcutting was among the fastest in wet landscapes due to enhanced energy availability. Conversely, commercial thinning regrowth rates were insensitive to hydroclimate and relatively consistent across the western US Planting had a differential effect on forest structure and rates of regrowth across hydroclimate with negative effects in wet environments and positive effects in dry environments. In aggregate, this study provides a novel remote sensing approach for characterizing forest regrowth dynamics across climatic gradients and the common treatment options employed.
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影响因子：
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作者：
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通讯作者：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
6.3
作者：
King, DI;Griffin, CR;Degraaf, RM
通讯作者：
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