If you can’t stand the heat, stay out of the city: Thermal reaction norms of chitinolytic fungi in an urban heat island

Elevated soil and air temperatures in urban heat islands have been exerting evolutionary pressure on organisms for decades in some cities. We measured thermal reaction norms (18–26 °C) for growth rate of four species of common chitinolytic fungi from an oak forest in an urban heat island and a corre...

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Bibliographic Details
Published in:Journal of thermal biology 2005-07, Vol.30 (5), p.384-391
Main Authors: McLean, M.A., Angilletta, M.J., Williams, K.S.
Format: Article
Language:English
Subjects:
Chitinolytic fungi
Growth rate
Lagena
Microfungi
Penicillium bilaii
Temperature
Torulomyces lagena
Trichoderma koningii
Urban heat island
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Summary:Elevated soil and air temperatures in urban heat islands have been exerting evolutionary pressure on organisms for decades in some cities. We measured thermal reaction norms (18–26 °C) for growth rate of four species of common chitinolytic fungi from an oak forest in an urban heat island and a corresponding rural area. Urban isolates of Chrysosporium pannorum and Trichoderma koningii grew faster than rural isolates at 26 °C, but grew slower than rural isolates at 18 °C. Urban isolates of Torulomyces lagena and Penicillium bilaii grew as fast or faster than rural isolates at all temperatures. These differences in thermal reaction norms between urban and rural isolates suggest that urbanization has caused both thermal specialization and counter-gradient variation in the fungal community.
ISSN:0306-4565
1879-0992
DOI:10.1016/j.jtherbio.2005.03.002