Thermal conditions within tree cavities in ponderosa pine (Pinus ponderosa) forests: potential implications for cavity users

International Journal of Biometeorology
Kerri T VierlingKelsi Potterf

Abstract

Tree cavities provide critical roosting and breeding sites for multiple species, and thermal environments in these cavities are important to understand. Our objectives were to (1) describe thermal characteristics in cavities between June 3 and August 9, 2014, and (2) investigate the environmental factors that influence cavity temperatures. We placed iButtons in 84 different cavities in ponderosa pine (Pinus ponderosa) forests in central Washington, and took hourly measurements for at least 8 days in each cavity. Temperatures above 40 °C are generally lethal to developing avian embryos, and ~ 18% of the cavities had internal temperatures of ≥ 40 °C for at least 1 h of each day. We modeled daily maximum cavity temperature, the amplitude of daily cavity temperatures, and the difference between the mean internal cavity and mean ambient temperatures as a function of several environmental variables. These variables included canopy cover, tree diameter at cavity height, cavity volume, entrance area, the hardness of the cavity body, the hardness of the cavity sill (which is the wood below the cavity entrance which forms the barrier between the cavity and the external environment), and sill width. Ambient temperature had the largest eff...Continue Reading

References

May 17, 2006·Trends in Ecology & Evolution·Jerald B Johnson, Kristian S Omland
Jan 11, 2007·International Journal of Biometeorology·Martin Paclík, Karel Weidinger
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Oct 16, 2015·Ecological Applications : a Publication of the Ecological Society of America·Teresa J LorenzPhilip C Fischer

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Citations

Jan 29, 2019·International Journal of Biometeorology·Marta Maziarz
May 22, 2021·Journal of Thermal Biology·Ross L Goldingay, Karen J Thomas

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