External temperature and distance from nearest entrance influence microclimates of cave and culvert‐roosting tri‐colored bats (Perimyotis subflavus)
| Autor: | Jonah W. Evans, Michael L. Morrison, Samantha J. Leivers, Melissa B. Meierhofer, Brian L. Pierce |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Culvert North American bat Microclimate 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Cave lcsh:QH540-549.5 cave hibernation Ecology Evolution Behavior and Systematics Overwintering 030304 developmental biology Nature and Landscape Conservation Original Research Perimyotis subflavus Hydrology 0303 health sciences geography actual water vapor pressure geography.geographical_feature_category Ecology temperature culvert Climate stability tri‐colored bat Environmental science Spatial variability lcsh:Ecology microclimate |
| Zdroj: | Ecology and Evolution, Vol 9, Iss 24, Pp 14042-14052 (2019) Ecology and Evolution |
| ISSN: | 2045-7758 |
| Popis: | Many North American bat species hibernate in both natural and artificial roosts. Although hibernacula can have high internal climate stability, they still retain spatial variability in their thermal regimes, resulting in various “microclimates” throughout the roost that differ in their characteristics (e.g., temperature and air moisture). These microclimate components can be influenced by factors such as the number of entrances, the depth of the roost, and distance to the nearest entrance of the roost. Tri‐colored bats are commonly found roosting in caves in winter, but they can also be found roosting in large numbers in culverts, providing the unique opportunity to investigate factors influencing microclimates of bats in both natural and artificial roost sites. As tri‐colored bats are currently under consideration for federal listing, information of this type could be useful in aiding in the conservation and management of this species through a better understanding of what factors affect the microclimate near roosting bats. We collected data on microclimate temperature and microclimate actual water vapor pressure (AWVP) from a total of 760 overwintering tri‐colored bats at 18 caves and 44 culverts. Using linear mixed models analysis, we found that variation in bat microclimate temperatures was best explained by external temperature and distance from nearest entrance in both caves and culverts. External temperature had a greater influence on microclimate temperatures in culverts than caves. We found that variation in microclimate AWVP was best explained by external temperature, distance from nearest entrance, and proportion from entrance (proportion of the total length of the roost from the nearest entrance) in culvert‐roosting bats. Variation in microclimate AWVP was best explained by external temperature and proportion from entrance in cave‐roosting bats. Our results suggest that bat microclimate temperature and AWVP are influenced by similar factors in both artificial and natural roosts, although the relative contribution of these factors differs between roost types. Tri‐colored bats are commonly found winter roosting in caves, but they can also be found roosting in culverts, providing the unique opportunity to investigate factors influencing bat microclimate temperatures in both natural and artificial roost sites. We collected data on microclimate temperatures and actual water vapor pressure near roosting bats in 18 caves and 44 culverts. Our results suggest that bat microclimate components are influenced by the same factors in both artificial and natural roosts, although the relative contribution of these factors differs between roost types. |
| Databáze: | OpenAIRE |
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