Bet-hedging applications for conservation
Bet-hedging applications for conservation
复制标题
DOI：
10.1007/bf02704967
复制
发表时间：
2002-07-01
影响因子：
2.9
通讯作者：
Servheen, C
中科院分区：
文献类型：
--
作者：
Boyce, MS;Kirsch, EM;Servheen, C
保护生物学的早期原则之一是通过维持一个物种的多个种群来提高种群的生存能力。这一原则的力量是由下注对冲的原则证明的。减少种群规模差异的管理策略也将减少灭绝的风险。独立种群中种群波动的不同步性减少了种群总数的方差，而区域间的环境相关性增加了所有种群灭绝的风险。我们回顾了赌注对冲的理论基础，并建议将其应用于内布拉斯加州最小燕鸥和美国北方落基山脉灰熊的保护管理。如果我们能维持普拉特河中部的小种群，以及普拉特河下游的大种群，那么最小种群灭绝的风险就会降低。同样，通过将灰熊恢复到爱达荷州和蒙大拿州的比特鲁特荒野，可以将美国落基山脉灰熊灭绝的可能性降低69- 93%。
One of the early tenets of conservation biology is that population viability is enhanced by maintaining multiple populations of a species. The strength of this tenet is justified by principles of bet-hedging. Management strategies that reduce variance in population size will also reduce risk of extinction. Asynchrony in population fluctuations in independent populations reduces variance in the aggregate of populations whereas environmental correlation among areas increases the risk that all populations will go extinct. We review the theoretical rationale of bet-hedging and suggest applications for conservation management of least terns in Nebraska and grizzly bears in the northern Rocky Mountains of the United States. The risk of extinction for least terns will be reduced if we can sustain the small central Platte River population in addition to the larger population on the lower Platte. Similarly, by restoring grizzly bears to the Bitterroot wilderness of Idaho and Montana can reduce the probability of extinction for grizzly bears in the Rocky Mountains of the United States by as much as 69-93%.