4.7 Article

Impact of Allee effects on the establishment of reintroduction populations of endangered species: The case of the Crested Ibis

期刊

GLOBAL ECOLOGY AND CONSERVATION
卷 35, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.gecco.2022.e02103

关键词

Positive density dependence; Reintroduction; Population dynamics; Mate-limitation; Predation

资金

  1. National Natural Science Foundation of China [31572282, 31872245]

向作者/读者索取更多资源

Allee effects, positive relationships between component fitness and population density, play a crucial role in reintroduced populations. This study found evidence of multiple Allee effects in reintroduced Crested Ibis populations, where reduced adult survival and breeding probability contributed to population decline. Strategies such as releasing large numbers of individuals, food supplementation, and predator control were proposed to eliminate or reduce the strength of Allee effects.
Allee effects, defined as the positive relationships between component fitness and population density (or size), play an important role in the dynamics of small or lowdensity populations. Reintroduction has become a widely applied tool with the continuous loss of biodiversity. Since reintroduced populations are initially small, Allee effects commonly exist when a species is colonizing new habitat. However, direct evidence of positive density-dependence acting in reintroduced populations is rare. To understand the role of Allee effects in regulating post-release population dynamics of reintroduced species, we analyzed time-series data collected from two spatially isolated populations of the reintroduced Crested Ibis (Nipponia nippon) in Shaanxi Province, China (Ningshan and Qianyang Counties). We examined the potential relationships between population size and (1) survival and reproductive rates, (2) per capita population growth rates for the existence of Allee effects in the reintroduced ibis populations. The results showed that the simultaneous occurrence of component Allee effects in survival and reproduction have been detected, while the reduction of adult survival and per female breeding probability led to a demographic Allee effect in the Qianyang ibis population, which may have contributed to the population decline. In parallel, mate-limitation and predation as the possible initiation mechanisms of Allee effects were presented. Our findings provided the evidence of multiple Allee effects in reintroduced populations and conservation management strategies to eliminate or reduce the strength of Allee effects in future reintroductions of endangered species were proposed, including release of large number of individuals, food supplementation, and predator control.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据