Food for everyone: Differential feeding habits of cryptic bat species inferred from DNA metabarcoding.
Food for everyone: Differential feeding habits of cryptic bat species inferred from DNA metabarcoding.
复制标题
DOI：
10.1111/mec.16073
复制
发表时间：
2021-09
影响因子：
4.9
通讯作者：
Ruedi M
中科院分区：
文献类型：
--
作者：
Andriollo T;Michaux JR;Ruedi M
生态学理论认为，共生物种的生态位必须在某些生态维度上有所不同，才能使它们稳定共存。然而，许多生物系统挑战这种竞争排斥原则。来自北半球的食虫蝙蝠通常形成具有高度相似功能特征和属于相同觅食行会的多个物种的局部组合。尽管它们的营养生态位可以通过猎物的遗传鉴定获得前所未有的细节，但资源分配的潜在机制仍未被探索。本研究利用DNA元条形码技术研究了三种密切相关的Plecotus属蝙蝠在同系及其整个繁殖季节的差异饮食。即使在如此小的地理范围内，我们也发现它们的饮食组成在种内和种间水平上存在强烈的季节性和空间变化。事实上，虽然不同的蝙蝠在春季捕食不同的猎物，但它们在夏秋两季表现出更高的营养生态位重叠，当时所有三种蝙蝠都改变了狩猎行为，以暂时丰富的蛾子为食。通过对600多种被捕食物种的19个生态特征的恢复，我们进一步推断每种蝙蝠使用不同的觅食场所和狩猎技术，表明生态位划分主要是由栖息地驱动的。两种亲缘关系最密切的蝙蝠表现出非常不同的觅食栖息地偏好，而第三种亲缘关系较远的蝙蝠则表现出更广泛的觅食栖息地偏好。这些结果表明，为了充分了解物种共存，需要收集时间上全面的样本，而通过元条形码方法获得的猎物分类身份可以获得有价值的信息。
Ecological theory postulates that niches of co‐occurring species must differ along some ecological dimensions in order to allow their stable coexistence. Yet, many biological systems challenge this competitive exclusion principle. Insectivorous bats from the Northern Hemisphere typically form local assemblages of multiple species sharing highly similar functional traits and pertaining to identical feeding guilds. Although their trophic niche can be accessed with unprecedented details using genetic identification of prey, the underlying mechanisms of resource partitioning remain vastly unexplored. Here, we studied the differential diet of three closely‐related bat species of the genus Plecotus in sympatry and throughout their entire breeding season using DNA metabarcoding. Even at such a small geographic scale, we identified strong seasonal and spatial variation of their diet composition at both intra‐ and interspecific levels. Indeed, while the different bats fed on a distinct array of prey during spring, they showed higher trophic niche overlap during summer and fall, when all three species switched their hunting behaviour to feed on few temporarily abundant moths. By recovering 19 ecological traits for over 600 prey species, we further inferred that each bat species used different feeding grounds and hunting techniques, suggesting that niche partitioning was primarily habitat‐driven. The two most‐closely related bat species exhibited very distinct foraging habitat preferences, while the third, more distantly‐related species was more generalist. These results highlight the need of temporally comprehensive samples to fully understand species coexistence, and that valuable information can be derived from the taxonomic identity of prey obtained by metabarcoding approaches.
登录
查看更多内容
DOI：
10.1098/rspb.2009.1910
发表时间：
2010-04-22
影响因子：
4.7
作者：
Altermatt, Florian
通讯作者：
Altermatt, Florian
影响因子：
1
作者：
Alberdi, Antton;Garin, Inazio;Aihartza, Joxerra
通讯作者：
Aihartza, Joxerra
影响因子：
3.7
作者：
Alberdi A;Garin I;Aizpurua O;Aihartza J
通讯作者：
Aihartza J
影响因子：
2
作者：
Ashrafi, Sohrab;Beck, Andres;Bontadina, Fabio
通讯作者：
Bontadina, Fabio
影响因子：
3.4
作者：
Ashrafi, Sohrab;Rutishauser, Marianne;Bontadina, Fabio
通讯作者：
Bontadina, Fabio