|| 要旨トップ | 本企画の概要 |||日本生態学会第63回全国大会 (2016年3月、仙台) 講演要旨
企画集会 T07-2 (Lecture in Symposium/Workshop)
Contrary to natural ecosystems, complex ecological communities are predicted to be fragile. The adaptive switching of interaction partners was proposed as a key factor to resolve the complexity–stability problem. However, this theory is based on the food webs that comprise predator–prey interactions alone, leaving the question of how adaptive behavior affects the dynamics of hybrid communities with multiple interaction types unanswered. Here, using a bipartite community network model with antagonistic and mutualistic interactions, I show that adaptive partner shifts by both antagonists and mutualists are crucial to the persistence of communities. The results show that adaptive behavior destabilizes the dynamics of communities with a single interaction type; however, hybridity of multiple interaction types within a community greatly improves the stability. Moreover, adaptive behavior does not create a positive complexity–stability relationship in communities with a single interaction type but it does in the hybrid community. The diversity of interaction types is predicted to play a crucial role in community maintenance in an adaptive world.