G2TT
来源类型Journal Article
规范类型论文
Optimal Investment to Enable Evolutionary Rescue
Jaime Ashander; Lisa C. Thompson; James Sanchirico; Marissa L. Baskett
发表日期2019-03-06
出版年2019
语种英语
摘要“Evolutionary rescue” is the potential for evolution to enable population persistence in a changing environment. Even with eventual rescue, evolutionary time lags can cause the population size to temporarily fall below a threshold susceptible to extinction. To reduce extinction risk given human-driven global change, conservation management can enhance populations through actions such as captive breeding. To quantify the optimal timing of, and indicators for engaging in, investment in temporary enhancement to enable evolutionary rescue, we construct a model of coupled demographic-genetic dynamics given a moving optimum. We assume “decelerating change”, as might be relevant to climate change, where the rate of environmental change initially exceeds a rate where evolutionary rescue is possible, but eventually slows. We analyze the optimal control path of an intervention to avoid the population size falling below a threshold susceptible to extinction, minimizing costs. We find that the optimal path of intervention initially increases as the population declines, then declines and ceases when the population growth rate becomes positive, which lags the stabilization in environmental change. In other words, the optimal strategy involves increasing investment even in the face of a declining population, and positive population growth could serve as a signal to end the intervention. In addition, a greater carrying capacity relative to the initial population size decreases the optimal intervention. Therefore, a one-time action to increase carrying capacity, such as habitat restoration, can reduce the amount and duration of longer term investment in population enhancement, even if the population is initially lower than and declining away from the new carrying capacity.
主题Endangered Species
URLhttps://www.rff.org/publications/journal-articles/optimal-investment-enable-evolutionary-rescue/
来源智库Resources for the Future (United States)
资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/588169
推荐引用方式
GB/T 7714
Jaime Ashander,Lisa C. Thompson,James Sanchirico,et al. Optimal Investment to Enable Evolutionary Rescue. 2019.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jaime Ashander]的文章
[Lisa C. Thompson]的文章
[James Sanchirico]的文章
百度学术
百度学术中相似的文章
[Jaime Ashander]的文章
[Lisa C. Thompson]的文章
[James Sanchirico]的文章
必应学术
必应学术中相似的文章
[Jaime Ashander]的文章
[Lisa C. Thompson]的文章
[James Sanchirico]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。