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- Title
Environmental descriptors and reproductive modes drive multiple facets of tadpole diversity in subtropical temporary ponds.
- Authors
Dalmolin, Diego Anderson; dos Santos, Tiago Gomes; Tozetti, Alexandro Marques; Pereira, Maria João Ramos
- Abstract
Temporary ponds contribute to the maintenance of freshwater biodiversity. Biotic and abiotic predictors are known to influence community assembly patterns in ponds, but the magnitude of these effects on different facets of diversity remains poorly investigated. We evaluated the influence of different ecological predictors (climatic and local environmental descriptors, and reproductive modes) on the taxonomic, functional, and phylogenetic diversity of anuran tadpoles in 10 temporary ponds in southern Brazil. We hypothesize that: (i) tadpole diversity will be affected by ecological predictors, particularly climate, known to influence the diversity of anuran reproductive modes; (ii) congruent responses by the three facets of diversity to the environmental predictors. We used structural equation models to reveal the pathways by which each ecological predictor affected tadpole diversity. Models explained over 85% of the variation in tadpole diversity. Water depth and dissolved oxygen positively influenced all dimensions of tadpole diversity, while pond area, air humidity, evaporation, and maximum and minimum air temperature negatively affected all facets of diversity. The foam nest strategy positively influenced phylogenetic diversity. Environmental filtering seems to be the driver behind the assembly patterns of tadpole communities in these temporary ponds, acting mostly through climate and pond area. The reproductive mode of leptodactylids contributes to the resilience of the communities during the dry phase of the ponds. Finally, the congruent responses of the three components of diversity to the environmental gradients reinforce the idea that tadpole communities are not randomly structured.
- Subjects
BRAZIL; PONDS; DISSOLVED oxygen in water; TADPOLES; FROGS; STRUCTURAL equation modeling; FRESHWATER biodiversity; COMMUNITIES; LEPTODACTYLIDAE
- Publication
Aquatic Ecology, 2022, Vol 56, Issue 4, p951
- ISSN
1386-2588
- Publication type
Article
- DOI
10.1007/s10452-022-09977-3