Diet of the insectivorous bat<i><scp>P</scp>ipistrellus nathusii</i>during autumn migration and summer residence

Krüger, Frauke; Clare, Elizabeth L.; Symondson, William Oliver Christian; Keišs, Oskars; Pētersons, Gunārs

doi:10.1111/mec.12547

Cited by 60 publications

(46 citation statements)

References 86 publications

(91 reference statements)

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“…The animal prey detected visually in Black Wheatear faeces was in line with previous studies (Hodar, ; Prodon, ; Richardson, ), showing a prevalence for Hymenoptera, mainly Formicidae, and Coleoptera, Hemiptera, Araneae and Diptera. As expected, these groups were largely recovered through molecular analysis, though metabarcoding yielded a much larger diversity of prey and higher taxonomic resolution, particularly in the case of the COI marker ZBJ (Hope et al, ; Krüger, Clare, Greif, et al, ; Krüger, Clare, Symondson, Clare, Symondson, Keišs, & Pētersons, ; Razgour et al, ). Furthermore, some taxa were far more often detected through metabarcoding than by visual examination, including orders that seemed to be important in the diet such as Lepidoptera and Orthoptera.…”

Section: Discussionmentioning

confidence: 78%

Advancing the integration of multi‐marker metabarcoding data in dietary analysis of trophic generalists

Silva

Mata

Lopes

et al. 2019

Molecular Ecology Resources

119

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The application of DNA metabarcoding to dietary analysis of trophic generalists requires using multiple markers in order to overcome problems of primer specificity and bias. However, limited attention has been given to the integration of information from multiple markers, particularly when they partly overlap in the taxa amplified, and vary in taxonomic resolution and biases. Here, we test the use of a mix of universal and specific markers, provide criteria to integrate multi‐marker metabarcoding data and a python script to implement such criteria and produce a single list of taxa ingested per sample. We then compare the results of dietary analysis based on morphological methods, single markers, and the proposed combination of multiple markers. The study was based on the analysis of 115 faeces from a small passerine, the Black Wheatears (Oenanthe leucura). Morphological analysis detected far fewer plant taxa (12) than either a universal 18S marker (57) or the plant trnL marker (124). This may partly reflect the detection of secondary ingestion by molecular methods. Morphological identification also detected far fewer taxa (23) than when using 18S (91) or the arthropod markers IN16STK (244) and ZBJ (231), though each method missed or underestimated some prey items. Integration of multi‐marker data provided far more detailed dietary information than any single marker and estimated higher frequencies of occurrence of all taxa. Overall, our results show the value of integrating data from multiple, taxonomically overlapping markers in an example dietary data set.

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Section: Discussionmentioning

confidence: 78%

Advancing the integration of multi‐marker metabarcoding data in dietary analysis of trophic generalists

Silva

Mata

Lopes

et al. 2019

Molecular Ecology Resources

119

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“…Therefore, migratory bats do not seem to consume large numbers of insects during migration flights. Since others and we observed migratory bats defecating shortly after they were captured at our study site [49], we speculate that migratory bats may hunt insects before they launch for long-distance migratory flights. We only observed a trend for a higher proportion of FB in relation to echolocation calls when the green light was switched on compared to darkness, suggesting that the feeding activity of P .…”

Section: Discussionmentioning

confidence: 92%

Migratory bats respond to artificial green light with positive phototaxis

et al. 2017

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Artificial light at night is spreading worldwide at unprecedented rates, exposing strictly nocturnal animals such as bats to a novel anthropogenic stressor. Previous studies about the effect of artificial light on bats focused almost exclusively on non-migratory species, yet migratory animals such as birds are known to be largely affected by light pollution. Thus, we conducted a field experiment to evaluate if bat migration is affected by artificial light at night. In late summer, we presented artificial green light of 520 nm wavelength to bats that were migrating south along the shoreline of the Baltic Sea. Using a light on-off treatment, we observed that the activity of Pipistrellus nathusii and P. pygmaeus, the two most abundant migratory species at our site, increased by more than 50% in the light-on compared to the light-off treatment. We observed an increased number of feeding buzzes during the light-on compared to the light-off treatment for P. nathusii. However, feeding activity was low in general and did not increase disproportionately during the light-on treatment in relation to the overall echolocation call activity of bats. Further, P. nathusii were attracted towards the green light at a distance of about 23 m, which is way beyond the echolocation detection range for insects of Nathusius’ bats. We therefore infer that migratory bats were not attracted to artificial green light because of high insect densities, but instead by positive phototaxis. We conclude that artificial light at night may potentially impact bat migration in a yet unrecognized way.

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“…Krüger et al. () suggested that all factors play a role; however, this cannot be proved, as prey availability, for example, was not evaluated.…”

Section: Resultsmentioning

confidence: 99%

Bats and aquatic habitats: a review of habitat use and anthropogenic impacts

Salvarina

2016

Mammal Review

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Many bats use aquatic habitats for foraging and for drinking water. Interactions between aquatic and terrestrial systems are important for understanding food web dynamics and for conserving species and ecosystems. Therefore, in this review, I examined the data available on bats’ use of aquatic habitats. The objectives of the present review were to evaluate the importance of aquatic resources for bats and to identify the effects that eutrophication, water pollution, and other anthropogenic impacts on water bodies have on bats. Most studies on bats and aquatic habitats have been conducted in Europe or in North America. They show, directly or indirectly, how bats use aquatic resources. Acoustic survey is the most common technique employed to assess habitat use by bats, although some researchers have used radio telemetry or other methods. Myotis daubentonii is the most commonly studied species. Within this topic, research does not tend to be focused more on threatened species. The effects of water pollution and eutrophication on bats remain unclear: different effects are reported for different species and in different areas. More studies are needed from Africa, South America, and Asia, regions for which few data are available, as well as from arid regions where fresh water is a limited resource.

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Diet of the insectivorous batPipistrellus nathusiiduring autumn migration and summer residence

Cited by 60 publications

References 86 publications

Advancing the integration of multi‐marker metabarcoding data in dietary analysis of trophic generalists

Advancing the integration of multi‐marker metabarcoding data in dietary analysis of trophic generalists

Migratory bats respond to artificial green light with positive phototaxis

Bats and aquatic habitats: a review of habitat use and anthropogenic impacts

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