Reconciling the contribution of environmental and stochastic structuring of tropical forest diversity through the lens of imaging spectroscopy.
Reconciling the contribution of environmental and stochastic structuring of tropical forest diversity through the lens of imaging spectroscopy.
复制标题
通过成像光谱学的视角协调热带森林多样性的环境和随机结构的贡献。
DOI：
10.1111/ele.13357
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发表时间：
2019
期刊：
影响因子：
8.8
通讯作者：
Bongalov B
中科院分区：
文献类型：
--
作者：
Bongalov B
生态位和随机扩散过程都构成了热带植物的非凡多样性，但确定它们的相对贡献已被证明具有挑战性。我们使用航空成像光谱来估计婆罗洲热带雨林广阔地区的冠层β多样性，并使用包含生态位和分散的模型来挑战这些数据。我们发现，遥感和实地估算的群落组成两两不相似度非常接近，证明了成像光谱在1000公顷以上包含不同森林类型的整个景观中提供β多样性数据的适用性。该模型较好地再现了经验数据，表明维持热带森林多样性的生态过程具有尺度依赖性。β‐多样性的模式是由局部作用的随机扩散过程形成的，而环境过程在更大范围内起作用。
Both niche and stochastic dispersal processes structure the extraordinary diversity of tropical plants, but determining their relative contributions has proven challenging. We address this question using airborne imaging spectroscopy to estimate canopy β‐diversity for an extensive region of a Bornean rainforest and challenge these data with models incorporating niches and dispersal. We show that remotely sensed and field‐derived estimates of pairwise dissimilarity in community composition are closely matched, proving the applicability of imaging spectroscopy to provide β‐diversity data for entire landscapes of over 1000 ha containing contrasting forest types. Our model reproduces the empirical data well and shows that the ecological processes maintaining tropical forest diversity are scale dependent. Patterns of β‐diversity are shaped by stochastic dispersal processes acting locally whilst environmental processes act over a wider range of scales.