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Table for five, please: Dietary partitioning in boreal bats
Eero J Vesterinen1,2, Anna I E Puisto1, Anna S Blomberg1,3
1Biodiversity Unit University of Turku Turku Finland.
Ecology and Evolution
|December 7, 2018
Summary
Five bat species show distinct dietary niches, primarily feeding on Diptera and Lepidoptera. Differences in prey size suggest unique evolutionary strategies for these insectivorous mammals.
Area of Science:
- Ecology
- Zoology
- Molecular Ecology
Background:
- Resource partitioning is crucial for sympatric species coexistence.
- Dietary analysis reveals ecological niches and evolutionary strategies.
Purpose of the Study:
- To investigate dietary niches of five sympatric bat species.
- To understand resource partitioning among insectivorous bats.
Main Methods:
- Fecal DNA metabarcoding was used to analyze 1,252 droppings.
- Prey identification from 13 arthropod orders.
Main Results:
- Nearly 550 prey species were identified, with Diptera and Lepidoptera dominating the diet (80-90%).
- All five bat species exhibited distinct dietary assemblages and significant differences in prey size.
- Diet composition analysis was consistent using both quantitative and presence-absence data.
Conclusions:
- Despite shared ecological traits (nocturnal, insectivorous, echolocation), bat species exhibit unique feeding behaviors.
- Dietary divergence suggests distinct evolutionary strategies in bats.
- Understanding bat diets is vital for ecological knowledge and conservation planning.
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