第72回生態適応セミナー (Aセミナー)

     
 

日時:7月13日(金曜日)16:00 –

 
  場所:青葉山キャンパス 生物地学共通講義室  
     

Richard P. Shefferson 准教授(University of Georgia)

     
  The evolutionary ecology of long-lived perennials: reproduction and inconsistent sprouting in a demographic context  
     
 

Much of our understanding of the evolution of lifespan stems from research on its evolution in animals. However, herbaceous plants break some of the rules of Hamiltonian senescence, particularly due to their indeterminate growth and modularity, which make their innate demographies more size-based than age-based. In this seminar, I will present my research on evolutionary demography in herbaceous perennials and some of the more unusual aspects of plant life histories, relying on recent work with short-lived perennials such as Plantago lanceolata and long-lived perennials such as Cypripedium parviflorum. Most notably, I will assess the evolutionary context and impacts of iteroparity and inconsistent sprouting, and show the relationships between reproductive schedules, sprouting schedules, life history costs, and the evolution of long lifespan. Along the way, I will explore four major research projects, and assess the impacts of complex life histories on the evolution of populations via analysis of projected life history costs and growth rates, and via modeling of evolutionarily stable strategies.