DNA diet profiles with high‐resolution animal tracking data reveal levels of prey selection relative to habitat choice in a crepuscular insectivorous bird,Ecology and Evolution

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DNA diet profiles with high‐resolution animal tracking data reveal levels of prey selection relative to habitat choice in a crepuscular insectivorous bird
Ecology and Evolution ( IF 2.3 ) Pub Date : 2020-10-16 , DOI: 10.1002/ece3.6893
Ruben Evens _{1,

2} , Greg Conway ₃ , Kirsty Franklin _{4,

5} , Ian Henderson ₃ , Jennifer Stockdale _{4,

6} , Natalie Beenaerts ₂ , Karen Smeets ₂ , Thomas Neyens ₂ , Eddy Ulenaers ₇ , Tom Artois ₂

Affiliation

Given the global decline of many invertebrate food resources, it is fundamental to understand the dietary requirements of insectivores. We give new insights into the functional relationship between the spatial habitat use, food availability, and diet of a crepuscular aerial insectivore, the European Nightjar (Caprimulgus europaeus) by relating spatial use data with high‐throughput sequencing (HTS) combined with DNA metabarcoding. Our study supports the predictions that nightjars collect a substantial part of their daily nourishment from foraging locations, sometimes at considerable distance from nesting sites. Lepidopterans comprise 65% of nightjars' food source. Nightjars tend to select larger species of Lepidoptera (>19 mm) which suggests that nightjars optimize the efficiency of foraging trips by selecting the most energetically favorable—larger—prey items. We anticipate that our findings may shed additional light on the interactions between invertebrate communities and higher trophic levels, which is required to understand the repercussions of changing food resources on individual‐ and population‐level processes.

中文翻译：

DNA饮食概况与高分辨率动物追踪数据揭示了黄昏食虫鸟类相对于栖息地选择的猎物选择水平

鉴于全球许多无脊椎动物食物资源的减少，了解食虫动物的饮食需求至关重要。通过将空间使用数据与高通量测序 (HTS) 和 DNA 元条形码相结合，我们对黄昏空中食虫动物欧洲夜鹰 ( Caprimulgus europaeus ) 的空间栖息地利用、食物供应和饮食之间的功能关系给出了新的见解。我们的研究支持了这样的预测，即夜鹰从觅食地点收集其日常营养的很大一部分，有时距离筑巢地点相当远。鳞翅目昆虫占夜鹰食物来源的 65%。夜鹰倾向于选择较大的鳞翅目物种（> 19毫米），这表明夜鹰通过选择最有利的（较大的）猎物来优化觅食旅行的效率。我们预计我们的研究结果可能会进一步阐明无脊椎动物群落与更高营养水平之间的相互作用，这是了解食物资源变化对个体和种群水平过程的影响所必需的。

更新日期：2020-12-03

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