Tadpoles' Resistance to Desiccation in Species of Leptodactylus (Anura, Leptodactylidae)

Venturelli, Diego P.; Silva, Wagner R. da; Giaretta, Ariovaldo Antônio

doi:10.1670/20-051

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Some features associated with the transition to laying eggs on land may therefore have been key in later enabling the evolution of terrestrial larvae and/or direct development. These features may include increased egg size and provisioning 11,21 , desiccation avoidance adaptations 64 , enhanced embryonic gas-exchange capabilities 65 , and parental care 27,28 . However, some of these characteristics may not be a requirement for live-bearing, in which neither the egg nor the developing embryo are exposed to the environment.…”

Section: Reproductive-mode Evolutionmentioning

confidence: 99%

The evolution of reproductive modes and life cycles in amphibians

2022

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Amphibians have undergone important evolutionary transitions in reproductive modes and life-cycles. We compare large-scale macroevolutionary patterns in these transitions across the three major amphibian clades: frogs, salamanders, and caecilians. We analyse matching reproductive and phylogenetic data for 4025 species. We find that having aquatic larvae is ancestral for all three groups and is retained by many extant species (33–44%). The most frequent transitions in each group are to relatively uncommon states: live-bearing in caecilians, paedomorphosis in salamanders, and semi-terrestriality in frogs. All three groups show transitions to more terrestrial reproductive modes, but only in caecilians have these evolved sequentially from most-to-least aquatic. Diversification rates are largely independent of reproductive modes. However, in salamanders direct development accelerates diversification whereas paedomorphosis decreases it. Overall, we find a widespread retention of ancestral modes, decoupling of trait transition rates from patterns of species richness, and the general independence of reproductive modes and diversification.

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Section: Reproductive-mode Evolutionmentioning

confidence: 99%

The evolution of reproductive modes and life cycles in amphibians

2022

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“…Species sensitivity to agrochemicals seems independent of phylogenetic relationships in amphibians (Egea-Serrano et al, 2012). However, dehydration can result in morphological alterations to tadpoles, even excluding certain species according to their plasticity to desiccation (Venturelli et al, 2021). Wetland water drainage is driven mainly by agriculture (Stirling et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Functional traits drive tadpole responses to land use in coastal areas

Boelter,

Moreira,

Stenert

et al. 2024

Freshwater Biology

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Land use changes are considered a significant cause of amphibian declines worldwide. However, little is known regarding which land uses have more pervasive impacts and which help to supplement the biodiversity conserved in protected areas. In addition, amphibian species respond to a broad array of geographical constraints, which may blur responses to disturbance, depending on the species' natural history. Here, we explored whether functional diversity patterns of amphibian assemblages are linked to human land use while considering spatial autocorrelation and phylogenetic relatedness among species. We surveyed tadpoles along 500 km in coastal wetlands in southern Brazil and quantified four traits related to tadpole habitat use and predator avoidance. Spatial components influenced functional richness to a greater extent than land use. Functional evenness was higher in ponds surrounded by more exotic reforestation, and to a lesser extent an effect of crop area. Functional divergence was also associated with reforestation areas. Our results showed that some land uses (reforestation with exotic species and temporary crops) have more pervasive impacts on tadpole communities. Such changes in amphibian communities occurred even at low levels of landscape change. Our findings highlight that conversion to human land use requires complementary approaches (i.e., tadpole and adult responses) to provide early warning signals about habitat modification effects.

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