New altitudinal record for Brachycephalus actaeus Monteiro, Condez, Garcia, Comitti, Amaral &amp;amp; Haddad, 2018 (Anura, Brachycephalidae), with comments on its habitats of occurrence

Bornschein, Marcos R.; Ribeiro, Luiz Fernando; Teixeira, Larissa; Pie, Márcio R.

doi:10.15560/15.6.1031

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…This forest, within the Serra do Mar, occurs in an orographic system of profound topographic and altimetric variation which influences rainfall, insolation, exposure to wind, drainage of water of the soil, microclimate, and the distribution of types of vegetation (de Almeida & Carneiro, 1998; Rizzini, 1997; Veloso et al., 1991). It has been shown that these variations affect the distribution and abundance of Brachycephalus in this region (Bornschein, Firkowski et al., 2016; Bornschein, Ribeiro et al., 2016; Bornschein, Ribeiro et al., 2019; Bornschein, Teixeira et al., 2019; Pie, Ribeiro, et al., 2018; Ribeiro et al., 2017) and, here, we presented evidence that the climate could also play a substantial role the skin morphology of this genus.…”

Section: Discussionsupporting

confidence: 69%

Relationships of mineralized dermal layer of mountain endemic miniature frogs with climate

et al. 2022

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The mineralized dermal layer (MDL) is found in most terrestrial anurans. Its thickness represents on average up to 8% of that of the entire skin. It has been proposed that it may reduce body water loss, act on homeostasis, support skin structure, or conversely, it may be a currently functionless trait constrained by groups' evolutionary history. We described the MDL morphology of 11 Brachycephalus species, terrestrial, miniaturized and microendemic anurans, and tested for its relationship with climate of higher latitude regions of the Atlantic Rainforest of Brazil. All species presented MDL, described with two distinct morphological patterns: homogeneous or heterogeneous MDL, the latter distinguishable by MDL with dorsal or lateral expansion, sometimes up to the limit of the epidermis and comprising up to 50% of the thicknesses of the entire skin. Climate differed between locations by MDL morphological group, less rainy or seasonally less rainy where species with heterogeneous MDL occur. Our results indicate that the abundance of calcium in MDL and its heterogeneous condition suggest its adaptive function in reduce water loss. Such adaptations in anurans in very humid highlands reinforce the mountains' propensity for rapid loss of humidity, demystifying them as an extremely abundant source of water. This is the third study that tested the relationship between the MDL morphology and the environment where species occur and the first that correlated this structure with the climate of anurans of the same habit and distributed in a single habitat, the Atlantic Rainforest.

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Section: Discussionsupporting

confidence: 69%

Relationships of mineralized dermal layer of mountain endemic miniature frogs with climate

et al. 2022

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“…There, it was found in regenerating forest alongside the flea-frog B. hermogenesi (Bornschein et al 2021). This frog is an ecologically demanding species that only thrives in native habitats or forests in advanced regenerating states [33].…”

Section: Discussionmentioning

confidence: 99%

The Rapid Expansion of the Jumping Snail Ovachlamys fulgens in Brazil

Salvador

Teixeira³

et al. 2022

Diversity

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The exotic Japanese jumping snail, Ovachlamys fulgens, was first recorded in Santa Catarina state, Brazil, in 2013. Based on data gathered from the literature, natural history collections, field samplings, and the iNaturalist platform, we assess its current distribution in the country. Our data show that the jumping snail has had a dramatic range expansion since its introduction, reaching six other states from the southern region of the country toward the Midwest. The affected locations are mostly urban but also include three biological reserves and protected areas, and possibly more. We discuss the consequences of this rapid invasion, its means of introduction, its local ecology, and prospects for monitoring and control.

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An estimate of the area of occupancy and population size of Brachycephalus tridactylus (Anura: Brachycephalidae) to reassess its conservation status, with a proposal for conservation measures

Bornschein

Nadaline

Ribeiro

et al. 2021

PeerJ

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Background We are experiencing a global crisis in conservation, which has led to the prioritization of targets, such as nations, regions, and animal groups, which are necessary while resources are disputed. Brazil is a priority not only because of its megadiversity, high rates of endemism, and frequent descriptions of new species but also because of its high levels of deforestation. Among the species groups prioritized for conservation is the anurans (Amphibia: Anura), the population of which is severely declining. One group of anurans is the genus Brachycephalus, which includes 37 endemic species in the Brazilian Atlantic Rainforest. Some of these species have highly restricted distributions (<100 ha). Thirty new species have been described since 2000, and 55.3% of all species are threatened with extinction. Brachycephalus tridactylus was only recently described and remains restricted to its type locality. Because of its reduced geographical distribution (0.41 km2), it has been proposed to be considered as Vulnerable. The objective of this study is to reevaluate the conservation status of Brachycephalus tridactylus and propose conservation measures. Methods We searched for new populations during 2016–2020, evaluated in loco impacts and potential impacts on the species’ population, and performed an analysis of the density of this population and estimated its size. International Union for Conservation of Nature (IUCN) criteria were used to assess the conservation status of the species. Results We recorded the species in seven new localities (from 715–1,140 m above sea level) in the state of São Paulo up to 33 km from the type locality of the species (in state of Paraná). We estimated the area of occupancy as 148.44 km2, densities as one calling male per 4.05 m2 and 130.00 m2, and a total population size of 4,429,722 adult individuals. Based on our finding, we proposed three lines of management: (1) formation of fire brigades, (2) management of residents’ mules in the conservation unit and surrounding areas, and (3) management of degraded areas. We recommend changing the species’ conservation status from Vulnerable to Endangered because of its fragmented distribution and decline in the area of occupancy and in the quality of its habitat. Our results have expanded the species previous geographic distribution and delimited areas without previous records. Our estimates of population density and size are in accordance with those verified for congeners. The conservation of this species benefits the environments and other species that inhabit them, being, therefore, strategic for receiving conservation actions that will spread throughout the ecosystem.

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New altitudinal record for Brachycephalus actaeus Monteiro, Condez, Garcia, Comitti, Amaral & Haddad, 2018 (Anura, Brachycephalidae), with comments on its habitats of occurrence

Cited by 3 publications

References 12 publications

Relationships of mineralized dermal layer of mountain endemic miniature frogs with climate

Relationships of mineralized dermal layer of mountain endemic miniature frogs with climate

The Rapid Expansion of the Jumping Snail Ovachlamys fulgens in Brazil

An estimate of the area of occupancy and population size of Brachycephalus tridactylus (Anura: Brachycephalidae) to reassess its conservation status, with a proposal for conservation measures

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