Movement and vertical stratification of fruit-feeding butterflies in a managed West African rainforest
Movement and vertical stratification of fruit-feeding butterflies in a managed West African rainforest
复制标题
西非管理雨林中食果蝴蝶的运动和垂直分层
DOI：
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发表时间：
2003
影响因子：
1.9
通讯作者：
M. Mühlenberg
中科院分区：
文献类型：
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作者：
Heleen Fermon;M. Waltert;M. Mühlenberg
我们分析了西非热带雨林内对照、稀疏和种植地点之间食果性蝴蝶的运动参数和垂直分层。总体而言，陷阱之间的移动距离在种植园中最大。在以GAP和边缘生境的早期演替寄主植物为食的物种中，运动参数通常最大。在这些物种中，与对照林相比，稀疏林中重新捕获的距离显著缩短。相反，以攀援植物和林下灌木为食的森林地上部分物种在稀疏的森林中表现出明显更大的迁移量。更高层的物种也在稀疏的下层中飞行了更长的距离。包括较高的地层样本，它们在稀疏地块中的丰度明显减少，尽管仅林下采样表明情况相反。比较抚育间伐和对照样地的垂直分布格局表明，抚育间伐后垂直分层被破坏。郁闭度较高的林分中，树冠物种似乎在上层飞行，而疏伐林分中，树冠物种下降的频率较高。因此，由于林地之间垂直分布的差异，林下取样可能会导致有偏见的结论。这项研究表明，间伐会影响有限范围的森林底板蝴蝶，以及更广泛的树冠蝴蝶动物群。
We analysed movement parameters and vertical stratification in fruit-feeding butterflies between a control, a thinned and a plantation site within a West African rainforest. Overall, distances moved between traps were largest in the plantation. Movement parameters were generally largest in species feeding on early successional hostplants of gap and margin habitats. In these species, distances between recaptures were significantly shorter in the thinned compared to the control forest. Conversely, forest floor species feeding on climbers and understorey shrubs showed significantly larger movement in the thinned forest. Higher strata species also flew larger distances in the thinned understorey. Including higher strata samples, they were significantly less abundant in the thinned plot, although understorey sampling alone indicated the contrary. Comparing vertical distribution patterns between thinned and control sites indicated a disruption of vertical stratification after thinning. Canopy species seem to fly in the upper strata of the more closed-canopy control forest, whereas they descend more frequently in the forest opened by the thinning management. Understorey sampling might therefore lead to biased conclusions due to differences in vertical distribution between forest plots. This study showed that thinning can affect the restricted-range forest floor butterflies as well as the more widespread canopy butterfly fauna.