THE EFFECTS OF WILDFIRE ON ROOST SELECTION OF THE CALIFORNIA MYOTIS

Anna C Doty; California State University Sacramento; anna.doty@csus.edu; Reed D. Crawford, Rachel V. Blakey

Insectivorous bats are considered indicators of ecosystem health due to their ability to occupy a wide variety of habitats as well as differing thermal niches. Therefore, investigating how insectivorous bats respond to habitat variability in an area that has not only long been susceptible to wildfires, but has been managed for fires through fire suppression, gives insight to population persistence not only for bats but for a variety of other small mammals. In 2020, Sequoia and Kings National Parks experienced a wildfire that spanned 3636 ha within park boundaries. We tracked eight California myotis bats (Myotis californicus) to 22 roost sites from June – August 2021 in an area with unburned to severely burnt habitat. The majority of M. californicus roosts (21 out of 22) were positioned within or <5 m from the burn mosaic, although unburned habitat was easily accessible. However, M. californicus showed preference for roosts located in low-severity burn areas, rather than severely burnt habitat. This study demonstrates that while wildfire may be beneficial for certain bat species, severe wildfire could be detrimental to some bats in summer by reducing canopy cover and altering or destroying preferred roost trees.

Ecology and Conservation of Bats - II 
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