Incorporating evaporative water loss into bioenergetic models of hibernation to test for relative influence of host and pathogen traits on white-nose syndrome
| Autor: | Catherine G. Haase, Raina K. Plowright, Liam P. McGuire, Kaleigh J. O. Norquay, C. Reed Hranac, Craig K. R. Willis, Nathan W. Fuller, David T. S. Hayman, Sarah H. Olson, Kirk A. Silas |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
030110 physiology
0106 biological sciences 0301 basic medicine Hibernation Atmospheric Science Bioenergetics Physiology Microclimate Social Sciences Biochemistry 01 natural sciences Fats Animal Wings Microbial Physiology Chiroptera Bats Medicine and Health Sciences Psychology Animal Anatomy Mammals 0303 health sciences Multidisciplinary Animal Behavior biology Energetics Microbial Growth and Development Eukaryota Myotis lucifugus Lipids Vertebrates Host-Pathogen Interactions Medicine Seasons Host adaptation Anatomy Arousal Research Article Fungal Growth Science Torpor Zoology Nose Microbiology 010603 evolutionary biology Hibernaculum 03 medical and health sciences Meteorology Animals 030304 developmental biology Behavior Winter Organisms Fungi Biology and Life Sciences Water Humidity biology.organism_classification Amniotes Earth Sciences Physiological Processes Developmental Biology |
| Zdroj: | PLoS ONE PLoS ONE, Vol 14, Iss 10, p e0222311 (2019) |
| DOI: | 10.1101/750257 |
| Popis: | Hibernation consists of extended durations of torpor interrupted by periodic arousals. The ‘dehydration hypothesis’ proposes that hibernating mammals arouse to replenish water lost through evaporation during torpor. Arousals are energetically expensive, and increased arousal frequency can alter survival throughout hibernation. Yet we lack a means to assess the effect of evaporative water loss (EWL), determined by animal physiology and hibernation microclimate, on torpor bout duration and subsequent survival. White-nose syndrome (WNS), a devastating disease impacting hibernating bats, causes increased frequency of arousals during hibernation and EWL has been hypothesized to contribute to this increased arousal frequency. WNS is caused by a fungus, which grows well in humid hibernaculum environments and damages wing tissue important for water conservation. Here, we integrated the effect of EWL on torpor expression in a hibernation energetics model, including the effects of fungal infection, to determine the link between EWL and survival. We collected field data forMyotis lucifugus, a species that experiences high mortality from WNS, to gather parameters for the model. In saturating conditions we predicted healthy bats experience minimal mortality. Infected bats, however, suffer high fungal growth in highly saturated environments, leading to exhaustion of fat stores before spring. Our results suggest that host adaptation to humid environments leads to increased arousal frequency from infection, which drives mortality across hibernaculum conditions. Our modified hibernation model provides a tool to assess the interplay between host physiology, hibernaculum microclimate, and diseases such as WNS on winter survival. |
| Databáze: | OpenAIRE |
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