Effects of competitive pressure and habitat heterogeneity on niche partitioning between Arctic and boreal congeners.
Effects of competitive pressure and habitat heterogeneity on niche partitioning between Arctic and boreal congeners.
复制标题
DOI：
10.1038/s41598-021-01506-w
复制
发表时间：
2021-11-11
影响因子：
4.6
通讯作者：
Ratcliffe N
中科院分区：
文献类型：
--
作者：
Bonnet-Lebrun AS;Larsen T;Frederiksen M;Fox D;le Bouard F;Boutet A;Þórarinsson ÞL;Kolbeinsson Y;Deville T;Ratcliffe N
北极气候的迅速变化预计将对海鸟的觅食生态产生重大影响，因为海鸟的猎物和竞争者的分布和丰富程度都发生了变化（例如，南方物种将其活动范围扩大到北极）。物种可以通过沿沿着不同的生态位轴分离来应对种间竞争。在这里，我们研究了两个密切相关的海鸟物种之间的空间，时间和栖息地隔离：常见的海鸠Uria aalge（温带物种）和Brünnich的海鸠Uria lomvia（一个真正的北极物种），在冰岛的两个同域的网站，不同的总人口规模和海洋栖息地的可用性。我们部署了GPS和温度深度记录仪来描述觅食的位置和行为的孵化和鸡饲养成人。我们发现了类似的证据，在这两个网站的空间隔离（即独立的人口规模），虽然在环境空间隔离是唯一明显的网站具有较强的栖息地梯度。出乎意料的是，时间（和，在有限的程度上，垂直）隔离只出现在人口最少的网站。总体而言，我们的研究结果表明，推断的竞争水平和隔离之间的复杂关系。
The rapidly changing climate in the Arctic is expected to have a major impact on the foraging ecology of seabirds, owing to changes in the distribution and abundance of their prey but also that of competitors (e.g. southerly species expanding their range into the Arctic). Species can respond to interspecific competition by segregating along different niche axes. Here, we studied spatial, temporal and habitat segregation between two closely related seabird species: common guillemot Uria aalge (a temperate species) and Brünnich’s guillemot Uria lomvia (a true Arctic species), at two sympatric sites in Iceland that differ in their total population sizes and the availability of marine habitats. We deployed GPS and temperature-depth recorders to describe foraging locations and behaviour of incubating and chick-rearing adults. We found similar evidence of spatial segregation at the two sites (i.e. independent of population sizes), although segregation in environmental space was only evident at the site with a strong habitat gradient. Unexpectedly, temporal (and, to a limited extent, vertical) segregation appeared only at the least populated site. Overall, our results show complex relationships between the levels of inferred competition and that of segregation.
登录
查看更多内容
影响因子：
30.7
作者：
Fossheim, Maria;Primicerio, Raul;Dolgov, Andrey V.
通讯作者：
Dolgov, Andrey V.
影响因子：
2.7
作者：
Descamps, Sebastien;Strom, Hallvard;Steen, Harald
通讯作者：
Steen, Harald
影响因子：
4.8
作者：
Bohn, T;Amundsen, PA
通讯作者：
Amundsen, PA
影响因子：
2.3
作者：
Gosselink, TE;Van Deelen, TR;Joselyn, MG
通讯作者：
Joselyn, MG
影响因子：
3.3
作者：
Huffeldt, Nicholas Per;Merkel, Flemming R.
通讯作者：
Merkel, Flemming R.