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Disentangling the relative effect of light pollution, impervious surfaces and intensive agriculture on bat activity with a national-scale monitoring program
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Disentangling the relative effect of light pollution, impervious surfaces and intensive agriculture on bat activity with a national-scale monitoring program
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Journal Article
Disentangling the relative effect of light pollution, impervious surfaces and intensive agriculture on bat activity with a national-scale monitoring program
2016
Overview
Context
Light pollution is a global change affecting a major proportion of global land surface. Although the impacts of Artificial Light At Night (ALAN) have been documented locally for many taxa, the extent of effect of ALAN at a landscape scale on biodiversity is unknown.
Objectives
We characterized the landscape-scale impacts of ALAN on 4 insectivorous bat species
Pipistrellus pipistrellus
,
Pipistrellus kuhlii
,
Eptesicus serotinus
,
Nyctalus leisleri
, and compared the extent of their effects to other major land-use pressures.
Methods
We used a French national-scale monitoring program recording bat activity among 2-km car transect surveys, and extracted landscape characteristics around transects with satellite and land cover layers. For each species, we performed multi-model averaging at 4 landscape scales (from 200 to 1000 m buffers around transects) to compare the relative effects of the average radiance, the proportion of impervious surface and the proportion of intensive agriculture.
Results
For all species, ALAN had a stronger negative effect than impervious surface at the 4 landscape scales tested. This effect was weaker than the effect of intensive agriculture. The negative effect of ALAN was significant for
P.
pipistrellus
,
P.
kuhlii
and
E.
serotinus
, but not for
N.
leisleri
. The effect of impervious surface varied among species while intensive agriculture had a significant negative effect on the 4 species.
Conclusion
Our results highlight the need to consider the impacts of ALAN on biodiversity in land-use planning and suggest that using only impervious surface as a proxy for urbanization may lead to underestimated impacts on biodiversity.
Publisher
Springer Netherlands,Springer Nature B.V,Springer Verlag
Subject
