Spatial patterns of light-demanding tree species in the Yangambi rainforest (Democratic Republic of Congo)

We are studying the factors of spatial distribution of light-demanding tree species in an undisturbed natural forest to contribute to the elucidation of the enigma of the persistence of light-demanding tree species in the canopy of the Congo Basin rainforests. Our objective was to analyze the current spatial distribution combined with the spatial autocorrelation of light-demanding stems species and to carry out a Canonical Correspondence Analysis (CCA) to discuss the role that different factors may have played in determining the observed spatial pattern. These species were subdivided into three regeneration guilds, based on their growth speed and longevity: short-lived pioneer (SLP), long-lived pioneer (LLP), and non-pioneer light-demanding (NPLD) species. We also compared the distribution of these species to that of Gilbertiodendron dewevrei, a typical extremely aggregative and locally hyperdominant shade-tolerant species. For this purpose, we carried out a selective inventory of all s...

我们旨在研究未受干扰天然林中喜光树种的空间分布因素，以助力解开刚果盆地雨林林冠层中喜光树种存续之谜。我们的目标是分析喜光树种个体当前的空间分布及其空间自相关（spatial autocorrelation），并通过典范对应分析（Canonical Correspondence Analysis, CCA）探讨不同因素在决定观测到的空间格局中可能发挥的作用。基于生长速度和寿命，这些树种被划分为三类更新功能群（regeneration guilds）：短命先锋种（short-lived pioneer, SLP）、长命先锋种（long-lived pioneer, LLP）以及非先锋喜光种（non-pioneer light-demanding, NPLD）。我们还将这些树种的分布与典型高度聚集且局域超优势的耐阴树种Gilbertiodendron dewevrei的分布进行了比较。为此，我们对所有s...进行了选择性清查。