Yamauchi Atsushi, Ito Koichi, Shibasaki Shota
Center for Ecological Research Kyoto University Otsu Japan.
International Institute for Zoonosis Control Hokkaido University Sapporo Japan.
Ecol Evol. 2023 Feb 14;13(2):e9832. doi: 10.1002/ece3.9832. eCollection 2023 Feb.
Over 40 years ago, Kempton (, , 1979, 307) reported significant modification to plant community structure following a long-term fertilization experiment. Many researchers have investigated this phenomenon in the years since. Collectively, these studies have shown consistent shifts in rank abundance relationships among species in communities following fertilization. The previous studies indicated that fertilization affects community structure through several critical processes, including trait-based functional response, reordering of species in rank abundance diagram (RAD), and niche dimensionality, although some questions have remained. How does the species reordering driven by the plant responses cause characteristic trends in temporal changes of RAD? Why are those trends ubiquitous in various systems? To answer those questions, we theoretically investigated the effects of fertilization on community structure based on a colonization model (or Levins model) with competition-fecundity trade-offs, which can result in the coexistence of multiple species under competition. The model represents characteristic RAD, which can be an adequate tool to study community composition. Our theoretical model comprehensively represents observed trends in rank abundance relationships following long-term fertilization and suggests that competitive interactions among species are a critical factor in structuring species diversity in plant communities.
40多年前，肯普顿（1979年，第307页）报告称，在一项长期施肥实验后，植物群落结构发生了显著变化。自那以后的几年里，许多研究人员对这一现象进行了调查。总体而言，这些研究表明，施肥后群落中物种的秩丰度关系发生了一致的变化。先前的研究表明，施肥通过几个关键过程影响群落结构，包括基于性状的功能响应、秩丰度图（RAD）中物种的重新排序以及生态位维度，尽管仍存在一些问题。由植物反应驱动的物种重新排序如何导致RAD时间变化的特征趋势？为什么这些趋势在各种系统中普遍存在？为了回答这些问题，我们基于一个具有竞争-繁殖力权衡的定殖模型（或莱文斯模型），从理论上研究了施肥对群落结构的影响，该模型可以导致多个物种在竞争下共存。该模型代表了特征RAD，它可以成为研究群落组成的一个合适工具。我们的理论模型全面地呈现了长期施肥后秩丰度关系的观测趋势，并表明物种间的竞争相互作用是构建植物群落物种多样性的一个关键因素。
