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Title: Loss of thermal refugia near equatorial range limits
Authors: Lima, F.P.
Gomes, F.
Seabra, R.
Wethey, D.S.
Seabra, M.I.
Cruz, T.
Santos, A.M.
Hilbish, T.J.
Keywords: biogeography
heat shock proteins
thermal refugia
thermal stress
Issue Date: 2016
Publisher: Global Change Biology
Citation: Lima, F. P., Gomes, F., Seabra, R., Wethey, D. S., Seabra, M. I., Cruz, T., Santos, A. M. and Hilbish, T. J., 2016. Loss of thermal refugia near equatorial range limits. Global Change Biology, 22 (1): 254-263.
Abstract: This study examines the importance of thermal refugia along the majority of the geographical range of a key inter- tidal species (Patella vulgata Linnaeus, 1758) on the Atlantic coast of Europe. We asked whether differences between sun-exposed and shaded microhabitats were responsible for differences in physiological stress and ecological perfor- mance and examined the availability of refugia near equatorial range limits. Thermal differences between sun- exposed and shaded microhabitats are consistently associated with differences in physiological performance, and the frequency of occurrence of high temperatures is most probably limiting the maximum population densities sup- ported at any given place. Topographical complexity provides thermal refugia throughout most of the distribution range, although towards the equatorial edges the magnitude of the amelioration provided by shaded microhabitats is largely reduced. Importantly, the limiting effects of temperature, rather than being related to latitude, seem to be tightly associated with microsite variability, which therefore is likely to have profound effects on the way local popu- lations (and consequently species) respond to climatic changes.
Type: article
Appears in Collections:BIO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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