SLOSS争论研究进展: 分析方法、理论机制及保护实践

章洋, 王彦平

A review of the SLOSS debate: Analysis methods, theoretical mechanisms and conservation practices

Yang Zhang, Yanping Wang

图5 当物种呈聚集分布时, 少量大斑块相交的物种数量(a)少于几个小斑块(b)和(c)。不同的颜色及相应的形状代表生境丧失前单个连续栖息地中的不同物种。黑色方框代表因生境丧失而形成的斑块。当少数大斑块和几个小斑块的斑块边缘之间的最大距离相等或类似时, 几个小斑块集能更均匀地覆盖在整个景观中, 因此相交的物种数更多(Fahrig et al, 2022)。(a)中2个大斑块与3个物种相交, 然而(b)中5个小斑块与6个物种相交。在斑块之间相距较远的情况下, 这种效应还会放大: (c)中5个小斑块相交了11个物种(该图改自Fahrig等, 2022)。

Fig. 5 When species are distributed in aggregations, the number of species intersecting a small number of large patches (a) is less than that of several small patches (b) and (c). Different colors and corresponding shapes represent different species in a single contiguous habitat prior to habitat loss. When the maximum distance between the patch edges of a few large patches and several samll patches is equal or similar, the set of several small patches can cover the entire landscape more evenly and therefore intersect a greater number of species (Fahrig et al, 2022). The two large patches in (a) intersect three species, butthe five small patches in (b) intersect six species. This effect is amplified when patches are further apart: the five small patches in (c) intersect 11 species (this figure is modified from Fahrig et al, 2022).