The mechanisms of community assembly based on spatial coalescent theory.

基于空间聚结理论的群落组装机制

• 批准号: 22657008
• 负责人: KUBOTA Yasuhiro
• 金额: $ 2.19万
• 依托单位: University of the Ryukyus
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22657008/
• 关键词: 生物多様性; 生物地理学; 群集生態学; マクロ生態学; マクロ進化; 中立理論; 系統的多様性; ネイマン・スコット点過程モデル; 群集集合; コアレセント理論; 琉球諸島

Sessile organisms demonstrate a variety of spatial assembly patterns, which are a result of demographic processes interacting with abiotic conditions. Determining factors are propagule dispersal and environmental gradients in a space ; a plant is present if and only if there were/are seed sources present and a dispersed seed can establish. Fitness in relation to environment has often been conceptualized as one of the principal components of the ecological niche, while dispersal is the first principle in the neutral theory. Therefore, quantitative evaluation of the relative importance of environmental filtering and dispersal limitation is needed, which will also lead us to a breakthrough in the debate on niche versus neutrality. In order to achieve such quantification, we need statistical models that can separately evaluate environmental filtering and dispersal in a common theoretical framework. For individual-based spatially explicit models, point processes can play a central role. An inhomogeneous Neyman. Scott process(I-NS) in which both environmental effects and dispersal processes are incorporated, has been introduced under different formulations. The objective of this study was to extend the likelihood-based method to the I-NS and to demonstrate the methodology using spatial data of forest communities. In addition, this study tried to examine the framework of biogeography and macroecology for incorporating macoevolutionary processes.

无柄生物表现出各种空间组合模式，这是人口过程与非生物条件相互作用的结果。决定因素是空间内的传播扩散和环境梯度；当且仅当有种子源存在且种子能够分散形成时，植物才存在。与环境相关的适应性通常被概念化为生态位的主要组成部分之一，而分散是中性理论的首要原则。因此，需要对环境过滤和扩散限制的相对重要性进行定量评估，这也将使我们在生态位与中性的争论中取得突破。为了实现这种量化，我们需要能够在一个共同的理论框架中分别评估环境过滤和扩散的统计模型。对于基于个体的空间显式模型，点过程可以发挥核心作用。一个非齐次内曼方程。在斯科特过程（I-NS）中，环境影响和扩散过程都被纳入其中，以不同的形式被引入。本研究的目的是将基于似然的方法扩展到I-NS，并利用森林群落空间数据对该方法进行验证。此外，本研究试图探讨生物地理学和宏观生态学的框架，以纳入微观进化过程。

项目成果

生物多様性の維持機構の解明に中立理論が果たす役割

中性理论在阐明维持生物多样性的机制中的作用

• 发表时间: 2012
• 期刊: 生物科学
• 作者: 岩嵜航;津田真樹;河田雅圭;平尾聡秀・久保田康裕・村上正志
• 通讯作者: 平尾聡秀・久保田康裕・村上正志

種多様性の地理的分布に対する歴史効果の影響

历史对物种多样性地理分布的影响。

• 发表时间: 2011
• 作者: 岩嵜航;津田真樹;河田雅圭;平尾聡秀・久保田康裕・村上正志;久保田康裕
• 通讯作者: 久保田康裕