|| 要旨トップ | 目次 |||日本生態学会第66回全国大会 (2019年3月、神戸) 講演要旨
一般講演（口頭発表） E02-05 （Oral presentation）
Many organisms are multicellular and thus changes ecological niches during development (ontogenetic niche shifts). Theoretical studies have shown that ontogenetic diet shifts can undermine the stability of stage-structured food webs when all interactions were assumed to be antagonistic (predation). Meanwhile, real ecological communities include not only antagonistic predation but also mutualism or competition (hybrid community). Further, the type of interspecific interactions may change because of ontogenetic niche shifts. At present, however, how these ontogenetic changes in the interaction types would mediate the stability of “stage-structured hybrid communities” remains unclear. To address this issue, I overview the dynamical features of two community modules for stage-structured hybrid communities: (i) consumer-mediated ontogenetic antagonism–mutualism coupling, wherein juveniles and adults of a consumer species utilize different resources as antagonists and mutualists, respectively, and (ii) resource-mediated ontogenetic antagonism–mutualism coupling, wherein juveniles and adults of a resource species interact with antagonistic and mutualistic consumers, respectively. Notably, in both cases, an ontogenetic change in the interaction type between antagonism and mutualism increases the community stability. Further studies are needed to integrate the theories for stage-structured food webs and non-structured hybrid communities, and to establish the stage-structured hybrid community view, for a better understanding of biodiversity mechanisms.