第83回 生態適応セミナー

日時 4月17日 [水] 13:30-15:00
場所 東北大学 青葉山キャンパス 生物棟 共通講義室
Nelson G. Hairston, Jr. 博士(Cornell University)

Eco-Evolutionary Dynamics in Laboratory and Natural Populations


Over the past decade, it has become increasingly recognized that adaptive evolutionary change can be so fast that it may occur on the same time scale as ecological change. Since ecological processes drive natural selection, and evolving traits determine the strength of ecological interactions, evolution and ecology can be intimately linked in an eco-evolutionary dynamic that Tom Schoener recently called “The Newest Synthesis.” I will review studies from my collaboration with Steve Ellner and our research group that illustrate these processes. I will start with laboratory microcosm communities in which population dynamics are radically altered when at least one of the species evolves as its environment changes, and will describe the research directions in which we are continuing to exploring these processes (retrospective analysis of other studies; three-species food webs). I will then describe methods for quantifying the relative importance of ecological and evolutionary changes for the outcome of ecological processes, and will illustrate these methods with examples from both laboratory and natural populations.