Thermal spikes from the urban heat island increase mortality and alter physiology of lizard embryos

The Journal of Experimental Biology
Joshua M Hall, Daniel A Warner

Abstract

Effects of global change (i.e. urbanization, climate change) on adult organisms are readily used to predict the persistence of populations. However, effects on embryo survival and patterns of development are less studied, even though embryos are particularly sensitive to abiotic conditions that are altered by global change (e.g. temperature). In reptiles, relatively warm incubation temperatures increase developmental rate and often enhance fitness-relevant phenotypes, but extremely high temperatures cause death. Due to the urban heat island effect, human-altered habitats (i.e. cities) potentially create unusually warm nest conditions that differ from adjacent natural areas in both mean and extreme temperatures. Such variation may exert selection pressures on embryos. To address this, we measured soil temperatures in places where the Puerto Rican crested anole lizard (Anolis cristatellus) nests in both city and forest habitats. We bred anoles in the laboratory and subjected their eggs to five incubation treatments that mimicked temperature regimes from the field, three of which included brief exposure to extremely high temperatures (i.e. thermal spikes) measured in the city. We monitored growth and survival of hatchlings in the ...Continue Reading

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Citations

Sep 1, 2018·Integrative and Comparative Biology·Oriol Lapiedra
Jan 18, 2020·Journal of Evolutionary Biology·Lisa E SchwanzStephen D Sarre
Mar 5, 2020·Animal Cognition·Theja Abayarathna, Jonathan K Webb
Apr 17, 2020·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Joshua M Hall, Daniel A Warner
Jul 9, 2020·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Emily N TaylorRory S Telemeco
Aug 7, 2020·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Joshua M Hall, Bao-Jun Sun
Dec 22, 2020·Trends in Ecology & Evolution·Max R LambertSarah E Diamond
Apr 14, 2021·Evolution & Development·Thomas J Sanger

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