Ambient temperature influences tolerance to plant secondary compounds in a mammalian herbivore

Proceedings. Biological Sciences
Patrice KurnathM Denise Dearing

Abstract

Growing evidence suggests that plant secondary compounds (PSCs) ingested by mammals become more toxic at elevated ambient temperatures, a phenomenon known as temperature-dependent toxicity. We investigated temperature-dependent toxicity in the desert woodrat (Neotoma lepida), a herbivorous rodent that naturally encounters PSCs in creosote bush (Larrea tridentata), which is a major component of its diet. First, we determined the maximum dose of creosote resin ingested by woodrats at warm (28-29°C) or cool (21-22°C) temperatures. Second, we controlled the daily dose of creosote resin ingested at warm, cool and room (25°C) temperatures, and measured persistence in feeding trials. At the warm temperature, woodrats ingested significantly less creosote resin; their maximum dose was two-thirds that of animals at the cool temperature. Moreover, woodrats at warm and room temperatures could not persist on the same dose of creosote resin as woodrats at the cool temperature. Our findings demonstrate that warmer temperatures reduce PSC intake and tolerance in herbivorous rodents, highlighting the potentially adverse consequences of temperature-dependent toxicity. These results will advance the field of herbivore ecology and may hone predict...Continue Reading

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Citations

Feb 25, 2017·F1000Research·Deron E Burkepile, John D Parker
Jun 28, 2017·Molecular Ecology·Patrice Kurnath ConnorsM Denise Dearing
Aug 14, 2019·Chemistry & Biodiversity·Yolanda Del Rocio Moreno-RamírezJorge Ariel Torres-Castillo
Oct 4, 2019·The Journal of Animal Ecology·Hannah R Windley, Takuya Shimada
Sep 8, 2017·Biological Reviews of the Cambridge Philosophical Society·Phillipa K BealeBen D Moore
Oct 2, 2019·Frontiers in Veterinary Science·Juan J Villalba, Xavier Manteca

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