| 要旨トップ | 目次 | 日本生態学会第68回全国大会 (2021年3月、岡山) 講演要旨
ESJ68 Abstract


一般講演(ポスター発表) P1-052  (Poster presentation)

2種系動態の環境依存性を理解する新しい枠組み:岩礁潮間帯固着生物群集の事例研究 【B】
A new framework to understand context dependence of two species population dynamics: a case study of rocky intertidal sessile assembly 【B】

*姚遠(北海道大学), 深谷肇一(国立環境研究所), 野田隆史(北海道大学)
*Yuan YAO(Hokkaido Univ.), Keiichi FUKAYA(NIES), Takashi NODA(Hokkaido Univ.)

Two-species system are the most convenient system to study context dependence of multi-species because such system can be formulated in a mathematical model by the smallest set of population parameters (intrinsic growth rate, strengths of intra- and interspecific density dependence of each species). To understand context dependence of population dynamics in two-species system, we propose a new framework in which standardized intrinsic growth rates of each species are regard as the environmental suitability for these species and, then assess how strengths of intra- and interspecific density dependence of these species change depending on the environmental suitability. By using 18yr data of pairwise sessile species in rocky intertidal shore along eastern Hokkaido, we revealed how strengths of intra- and interspecific density dependence of these species change depending on environmental suitability. Both the strengths of intra- and interspecific density dependence decreased with the increase of the environmental suitability of focal species, which indicated that strengths of intra- and interspecific density dependence are mainly related to its own environmental suitability for the two-species system. By combining this framework with modern coexistence theory and environmental gradient-based approach can provide a deep understanding for the coexistence mechanisms and context-dependency in species interaction in two-species system.


日本生態学会