Impacts of warming revealed by linking resource growth rates with consumer functional responses

The Journal of Animal Ecology
Derek C West, David M Post

Abstract

Warming global temperatures are driving changes in species distributions, growth and timing, but much uncertainty remains regarding how climate change will alter species interactions. Consumer-Resource interactions in particular can be strongly impacted by changes to the relative performance of interacting species. While consumers generally gain an advantage over their resources with increasing temperatures, nonlinearities can change this relation near temperature extremes. We use an experimental approach to determine how temperature changes between 5 and 30 °C will alter the growth of the algae Scenedesmus obliquus and the functional responses of the small-bodied Daphnia ambigua and the larger Daphnia pulicaria. The impact of warming generally followed expectations, making both Daphnia species more effective grazers, with the increase in feeding rates outpacing the increases in algal growth rate. At the extremes of our temperature range, however, warming resulted in a decrease in Daphnia grazing effectiveness. Between 25 and 30 °C, both species of Daphnia experienced a precipitous drop in feeding rates, while algal growth rates remained high, increasing the likelihood of algal blooms in warming summer temperatures. Daphnia pul...Continue Reading

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Jan 20, 2016·The Journal of Animal Ecology·Derek C West, David M Post

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Citations

Jan 24, 2019·Frontiers in Plant Science·Peiyu ZhangElisabeth S Bakker
Jan 14, 2017·Royal Society Open Science·Gustavo S BetiniJohn M Fryxell
Aug 17, 2019·Evolutionary Applications·M TsengAlexander E Chila
Jan 20, 2016·The Journal of Animal Ecology·Derek C West, David M Post
Jun 14, 2021·Ecology Letters·Alexis D SynodinosJosé M Montoya

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