Seed source pattern and terrain have scale-dependent effects on post-fire tree recovery
Seed source pattern and terrain have scale-dependent effects on post-fire tree recovery
复制标题
种子来源模式和地形对火灾后树木恢复具有规模依赖性影响
DOI：
10.1007/s10980-020-01071-z
复制
发表时间：
2020
影响因子：
5.2
通讯作者：
Smithwick, Erica A.
中科院分区：
文献类型：
--
作者：
Peeler, Jamie L.;Smithwick, Erica A.
到种子源的距离通常用于估计种子传播-火灾后树木恢复所需的过程。然而，距离，特别是在山区地形，不捕捉模式或规模依赖的影响控制种子供应和交付。测量种子源模式（面积和安排）可以提供洞察这些空间动态形状recovery.ObjectivesWe测试指标和调查如何种子源模式，树再生性状，规模和地形相互作用，以塑造火灾后树木恢复。我们的研究问题是：种子源模式优于距离时，建模树种的存在和更新密度？如果是，种子源格局对更新密度的影响是尺度依赖还是地形依赖？方法在71个样地周围嵌套空间范围内测量种子源格局，并对当地火灾后树木恢复进行相关测量。我们使用广义线性模型来测试指标和可视化尺度依赖和地形依赖的影响再生density.ResultsDistance充分模拟存在，但种子源模式优于距离时，建模再生密度。相关的空间范围和关系的物种依赖。对于风传播的物种，再生与更多的种子源面积和更复杂的安排，但地形调解这些关系。对于restroughing和重新发芽的物种，再生与种子来源面积少，不太复杂的安排，这是一致的高严重烧伤网站，促进recovery.ConclusionsSeed源模式支持空间弹性和相互作用的规模和地形形状再生密度。考虑到这些空间动态可以帮助管理面临不断变化的火灾状况的森林。
ContextDistance to seed source is often used to estimate seed dispersal—a process needed for post-fire tree recovery. However, distance, especially in mountainous terrain, does not capture pattern or scale-dependent effects controlling seed supply and delivery. Measuring seed source pattern (area and arrangement) could provide insights on how these spatial dynamics shape recovery.ObjectivesWe tested metrics and investigated how seed source pattern, tree regeneration traits, scale, and terrain interact to shape post-fire tree recovery. Our research questions were: Does seed source pattern outperform distance when modeling tree species presence and regeneration density? If yes, does seed source pattern have scale-dependent or terrain-dependent effects on regeneration density?MethodsWe measured seed source pattern at nested spatial extents around 71 plots and related measurements to local post-fire tree recovery. We used generalized linear models to test metrics and visualize scale-dependent and terrain-dependent effects on regeneration density.ResultsDistance sufficiently modeled presence, but seed source pattern outperformed distance when modeling regeneration density. Relevant spatial extents and relationships were species-dependent. For wind-dispersed species, regeneration was associated with more seed source area and more complex arrangements, but terrain mediated these relationships. For serotinous and resprouting species, regeneration was associated with less seed source area and less complex arrangements, which are consistent with high-severity burn sites that promote recovery.ConclusionsSeed source pattern supports spatial resilience and interacts with scale and terrain to shape regeneration density. Accounting for these spatial dynamics could help steward forests facing changing fire regimes.
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影响因子：
10.1
作者：
Buma, Brian;Brown, Carissa D.;Johnstone, Jill F.
通讯作者：
Johnstone, Jill F.
DOI：
--
发表时间：
1986
期刊：
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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通讯作者：
Garrett W. Meigs
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
J. Lyon;Peter F. STICKNEyl
通讯作者：
Peter F. STICKNEyl