Global changes in the odonate family ratios in response to the tropical forest degradation.

Autor: Šigutová H; Department of Zoology, Faculty of Science, Palacký University Olomouc, 17. listopadu 710, 779 00 Olomouc, Czechia., Pyszko P; Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Czechia., Bárta D; Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Czechia., Nsor CA; Department of Forest Resources Technology, Faculty of Renewable Natural Resources, Kwame Nkrumah University of Science and Technology, 29 Maham-Bla St, Kumasi, Ghana., Dolný A; Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Czechia. Electronic address: ales.dolny@osu.cz.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Oct 10; Vol. 946, pp. 174416. Date of Electronic Publication: 2024 Jul 01.
DOI: 10.1016/j.scitotenv.2024.174416
Abstrakt: Odonates (dragonflies and damselflies) can indicate the ecological health of aquatic biota within the rich but vulnerable biodiversity of tropical forests. The reaction of odonates to deforestation can be measured by changes in coarse taxonomic ratios. Suborder Zygoptera are thermal conformers susceptible to overheating, having the affinity with shaded, intact sites. Anisoptera have exothermic regulation and better dispersal capacities, suggesting their association with more altered, open environments. Similarly, with an increasing degradation, the proportion of Anisoptera species in assemblages should increase. However, based on the data from different continents, the Zygoptera/Anisoptera ratio may be too simple, strongly biased, and not applicable at the global scale. The main reason is that the most diverse, abundant, and cosmopolitan families, Coenagrionidae (Zygoptera) and Libellulidae (Anisoptera), comprise a great proportion of habitat generalists with high migratory capacity and affinity with open habitats. In this study, we sampled odonates from three bioregions (Indomalaya, Afrotropics, and Neotropics) over the gradient of tropical forest degradation with a comparable sampling effort to assess the suitability of species richness and suborder-based (Zygoptera/Anisoptera) and family-based (Libellulidae/other Anisoptera and Coenagrionidae/other Zygoptera) ratios and their abundance-weighted versions for monitoring tropical forest degradation. Our results show that simple Odonata as well as Zygoptera and Anisoptera richness are poor indicators of the forest biota alteration. Family-level indices weighted by relative abundance, especially those involving Coenagrionidae, were more sensitive to changes in forest conditions compared to suborder-level indices. Collectively, our results suggest that for biomonitoring, where financial resources and time are commonly critical, family-level ratio metrics may be effective tools to indicate even slight alterations of aquatic biota resulting from forest degradation. Although these indices have the potential for broader application, their effectiveness across tropical bioregions warrants further validation.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: