Microhabitat selection and thermoregulation in amazonian dragonflies.

Autor: Vinagre SF; Programa de Pós-Graduação Em Ecologia Aquática e Pesca (PPGEAP), Núcleo de Ecologia Aquática e Pesca da Amazônia (NEAP), Universidade Federal do Pará (UFPA), Rua Augusto Correia, Nº1, Bairro Guamá, Belém, 66075-110, Pará, Brazil; Laboratório de Ecologia e Conservação (LABECO), Instituto de Ciências Biológicas (ICB), Universidade Federal do Pará (UFPA), Rua Augusto Correia, Nº1, Bairro Guamá, Belém, 66075-110, Pará, Brazil. Electronic address: suellenfurtado@hotmail.com., Calvão LB; Laboratório de Ecologia e Conservação (LABECO), Instituto de Ciências Biológicas (ICB), Universidade Federal do Pará (UFPA), Rua Augusto Correia, Nº1, Bairro Guamá, Belém, 66075-110, Pará, Brazil; Programa de Pós-Graduação Em Ecologia (PPGECO), Instituto de Ciências Biológicas (ICB), Universidade Federal do Pará (UFPA), Rua Augusto Correia, Nº1, Bairro Guamá, Belém, 66075-110, Pará, Brazil., Córdoba-Aguilar A; Instituto de Ecología, Universidad Nacional Autónoma de México, Apdo. Postal 70-275, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, México City, Mexico., Ferreira RG; Lestes Lab, Centro de Entomologia e Biologia Experimental, Universidade Federal do Triangulo Mineiro, Uberaba, Minas Gerais, Brazil., Juen EL; Laboratório de Ecologia e Conservação (LABECO), Instituto de Ciências Biológicas (ICB), Universidade Federal do Pará (UFPA), Rua Augusto Correia, Nº1, Bairro Guamá, Belém, 66075-110, Pará, Brazil; Programa de Pós-Graduação Em Ecologia (PPGECO), Instituto de Ciências Biológicas (ICB), Universidade Federal do Pará (UFPA), Rua Augusto Correia, Nº1, Bairro Guamá, Belém, 66075-110, Pará, Brazil.
Jazyk: angličtina
Zdroj: Journal of thermal biology [J Therm Biol] 2024 Oct; Vol. 125, pp. 103998. Date of Electronic Publication: 2024 Oct 30.
DOI: 10.1016/j.jtherbio.2024.103998
Abstrakt: Insect eco-physiological traits are important for understanding their distribution and habitat selection, especially in the face of land use change. We estimated the average temperature of the thoracic surface of 20 Odonata (Insecta) species and classified them into thermoregulation categories according to their preferences for sunny or shaded habitats to assess their temperature variation. We tested the influence of air temperature and six morphological metrics related to thorax and abdomen size. We expected that: (i) heliothermic species would have higher thoracic temperatures compared to thermoconformer species; (ii) Zygopterans, due to their smaller body size, are less efficient at maintaining a constant body temperature relative to the air when compared to anisopterans; (iii) thorax volume would cause an increase in Odonata thoracic temperature, and abdomen length would cause a decrease. The study was conducted at 18 Amazonian streams in Eastern Amazonia. We observed differences of 2.5 °C in thoracic temperature between heliothermic and thermoconformer species, as predicted in the first hypothesis. Both suborders, Zygoptera and Anisoptera, use different morphological and environmental variables to control temperature. While Zygoptera thoracic temperature oscillated near and below air temperature (-1.28 ± 0.62), Anisoptera maintained temperatures above air temperature (1.81 ± 1.96). Air temperature influenced only the increase in Zygoptera thoracic temperature, supporting our second hypothesis. The third hypothesis was corroborated for order Odonata, but partially for its suborders. Zygoptera thoracic temperature was only related to abdomen length, which was proportional to a temperature decrease. Anisoptera temperature showed a relationship only with thoracic metrics, especially thorax volume, which had a significant contribution to temperature increase. Despite the observed differences, which varied according to size, we noted exceptions in the thermal characteristics of some species that deviated from these predictions. Therefore, we emphasize the importance of considering the interaction of other eco-physiological aspects in dragonfly temperature regulation.
Competing Interests: Declaration of Competing interest Authors declare not to have any conflict of interests.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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