Suppr超能文献

栖息地介导的外来水貂捕食对波罗的海外群岛普通蛙密度的影响。

Habitat-mediated impact of alien mink predation on common frog densities in the outer archipelago of the Baltic Sea.

机构信息

Section of Ecology, Department of Biology, University of Turku, 20014, Turku, Finland.

出版信息

Oecologia. 2010 Jun;163(2):405-13. doi: 10.1007/s00442-010-1573-9. Epub 2010 Feb 12.

Abstract

Alien predators have been recognised as one possible cause for amphibian declines around the world, but little is known of habitat-mediated predation impacts especially on adult amphibians. We studied common frog Rana temporaria under American mink Mustela vison predation in the outer archipelago of the Baltic Sea, south-western Finland. Using egg batches as an index of breeding frog female numbers we compared frog numbers and densities between a large, long-term mink-removal area and a comparable control area. Frog numbers in the removal area were at least 2.7-fold higher than those in the control area. In the presence of mink, frog densities increased with the amount of vegetation cover on the islands, indicating that mink predation affected frog densities especially on less-vegetated islands. An opposite trend appeared to be true for frogs in the mink-removal area, where other predators like snakes could induce a decline of frog densities on more vegetated islands. Shrub or grass vegetation seems to provide frogs shelter against alien mink predation. Our result highlights the importance of landscape-level habitat management as a conservation tool for amphibian populations.

摘要

外来捕食者被认为是导致世界各地两栖动物数量减少的一个可能原因,但对于栖息地介导的捕食对成年两栖动物的影响知之甚少。我们在芬兰西南部的波罗的海外群岛研究了普通蛙(Rana temporaria)在美洲水貂(Mustela vison)捕食下的情况。我们使用卵块作为繁殖蛙雌蛙数量的指标,比较了大型长期水貂清除区和可比对照区的蛙类数量和密度。清除区的蛙类数量至少是对照区的 2.7 倍。在水貂存在的情况下,随着岛屿植被覆盖量的增加,蛙类密度也随之增加,这表明水貂捕食特别影响了植被较少的岛屿上的蛙类密度。对于清除区的青蛙来说,似乎出现了相反的趋势,因为像蛇这样的其他捕食者可能会导致植被较多的岛屿上青蛙密度下降。灌木或草地植被似乎为青蛙提供了免受外来水貂捕食的庇护所。我们的研究结果强调了景观水平的栖息地管理作为保护两栖动物种群的重要工具。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验