A neurophysiological limit and its biogeographic correlations: cold-induced spreading depolarization in tropical butterflies

Author:

Andersen Mads Kuhlmann1ORCID,Willot Quentin2ORCID,MacMillan Heath A.1ORCID

Affiliation:

1. Carleton University 1 Department of Biology , , Ottawa, ON K1S 5B6 , Canada

2. Aarhus University 2 Department of Biology , , Aarhus 8000 , Denmark

Abstract

ABSTRACT The physiology of insects is directly influenced by environmental temperature, and thermal tolerance is therefore intrinsically linked to their thermal niche and distribution. Understanding the mechanisms that limit insect thermal tolerance is crucial to predicting biogeography and range shifts. Recent studies on locusts and flies suggest that the critical thermal minimum (CTmin) follows a loss of CNS function via a spreading depolarization. We hypothesized that other insect taxa share this phenomenon. Here, we investigate whether spreading depolarization events occur in butterflies exposed to cold. Supporting our hypothesis, we found that exposure to stressful cold induced spreading depolarization in all 12 species tested. This reinforces the idea that spreading depolarization is a common mechanism underlying the insect CTmin. Furthermore, our results highlight how CNS function is tuned to match the environment of a species. Further research into the physiology underlying spreading depolarization will likely elucidate key mechanisms determining insect thermal tolerance and ecology.

Funder

Carlsberg Foundation

European Union

Marie Skłodowska-Curie

Natural Sciences and Engineering Research Council of Canada

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Cold comas could stop the spread of butterflies;Journal of Experimental Biology;2023-09-15

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