Diversidade de anfíbios anuros de uma área de Pampa no município de São Gabriel, Rio Grande do Sul, Brasil

Bolzan, Aline Adriana; Hartmann, Paulo Afonso; Hartmann, Marília Teresinha

doi:10.1590/1678-476620141043277283

Cited by 6 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such impoverishment could be due to a sampling effect, because of low detection probabilities of many anuran species in the region (Moreira, Moura, & Maltchik, 2016). However, our results agree with other estimates of total richness at Pampa farmlands that were not based on a single sampling period (Bolzan, Hartmann, & Hartmann, 2014; Machado & Maltchik, 2010; Moreira & Maltchik, 2015; Saccol et al., 2017). Together, these studies revealed a complementary pattern in relation to the composition of anuran assemblages in the Pampa biome.…”

Section: Discussionsupporting

confidence: 91%

“…However, our results agree with other estimates of total richness at Pampa farmlands that were not based on a single sampling period (Bolzan, Hartmann, & Hartmann, 2014;Machado & Maltchik, 2010;Moreira & Maltchik, 2015;Saccol et al, 2017). Together, these studies re- and land use (Bolzan et al, 2014;Lipinski & Santos, 2014). In spite of the extensive geographic extension of the Uruguayan savanna ecoregion, few areas within it are protected by conservation units.…”

Section: Discussionsupporting

confidence: 89%

“…In spite of the extensive geographic extension of the Uruguayan savanna ecoregion, few areas within it are protected by conservation units. It is interesting to note that the species registered as adults only have the southern limit of their geographical distribution in the border between Brazil and Uruguay ( P. cuvieri and S. fuscovarius ; Maneyro, 2008; Maneyro & Carreira, 2012) or have low frequency of occurrence in the region ( O. aromothyella , P. henselii , and R. diptycha ; Bolzan et al., 2014; Bolzan et al., 2016; Santos, Kopp, Spies, Trevisan, & Cechin, 2008). Moreover, they display an explosive reproduction strategy and are usually recorded after heavy rainfall events (>50 mm/day).…”

Section: Discussionmentioning

confidence: 99%

“…Many species that could be considered as generalists have unexpected gaps in their distribution. Such idiosyncrasies are commonly attributed to local vegetation variations associated with soil heterogeneity, topography, and land use (Bolzan et al, 2014; Lipinski & Santos, 2014). In spite of the extensive geographic extension of the Uruguayan savanna ecoregion, few areas within it are protected by conservation units.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Something is not quite right: Effects of two land uses on anuran diversity in subtropical grasslands

2020

View full text Add to dashboard Cite

Although habitat modification is considered one of the main causes of biodiversity loss, the relative contribution of different rural land uses to biodiversity conservation is far less known. Additionally, the realization of the multidimensionality of biodiversity demands studies integrating variation of functional traits and phylogenetic information as complements to address the effects of land use on the structure of animal communities. Herein, we investigated the effects of land use (i.e., intensive agricultural and extensive livestock rearing) on functional and phylogenetic diversity of anuran communities in farmland ponds from the Uruguayan savanna ecoregion, while considering the effects of local factors (i.e., water depth) on species composition. We surveyed adults and tadpoles in 22 ponds and quantified five traits related to tadpole feeding, habitat use, and predator avoidance. Tadpole identification was corroborated by DNA barcoding based on a fragment of the mitochondrial 16S rRNA gene. We observed a decline in phylogenetic mean nearest taxon distance associated with increase of surrounding agricultural land use. While land use intensification did not affect richness (functional or phylogenetic), ponds in livestock ranches hosted about four times more tadpoles than agricultural ponds. Functional evenness decreased with water depth, although such relationship disappeared when considering phylogenetic non-independence. Our results indicated that specific anuran clades were more sensitive to intensification in land use, reinforcing a recent view of phylogenetic homogenization following habitat conversion. Additionally, our study suggests that extensive cattle grazing over wide native pastures may provide an alternative more compatible with conservation than short-term crops in subtropical grasslands.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Something is not quite right: Effects of two land uses on anuran diversity in subtropical grasslands

2020

View full text Add to dashboard Cite

show abstract

“…Like other animals in the aquatic ecosystem, their populations are even impacted by disturbances that are restricted to areas surrounding water resources (Findlay & Houlahan 1997, Toledo et al 2010, Bridia et al 2017, Häder et al 2020. These data are extremely concerning due to the history of conversion, fragmentation and degradation of tropical and subtropical regions, especially due to the advancement of the agricultural frontier (Bencke 2009, Bolzan et al 2014, Cosset et al 2018, Liu et al 2019, Moskowitz et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Anuran diversity in ponds associated with soybean plantations

Cunha

Dalzochio

Tozetti

2021

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

Anurans are considered one of the most threatened animal groups in the world. Agricultural activities are related to water pollution and contamination, which affects biphasic organisms such as amphibians. Brazilian soybean cultivation covers about 36 million hectares and encompasses many remaining ponds used as breeding sites for amphibians. In this study, we evaluated richness, abundance and composition of the anuran communities in ponds with different levels of association with soybean cultivation. A total of 18 anuran species were recorded with an abundance of 421 collected tadpoles and 1230 adult males on average. Ponds presented in soybean plantations were distinct from those adjacent to plantations regarding water properties and tadpole richness and abundance, as well as composition of tadpoles and adults. Ponds inserted in plantations had communities with lower diversity and abundance. One explanation for these results is likely the detrimental effect of soybean management, which suggests that this decrease is a result of community changes. This serves as an alert about the importance of buffer areas around plantations and the use of adequate techniques for pesticide application.

show abstract

Stop and ask for directions: factors affecting anuran detection and occupancy in Pampa farmland ponds

Moreira

Moura

Maltchik

2015

Ecological Research

View full text Add to dashboard Cite

There is a great need to understand the effects of man‐made land transformation on freshwater biodiversity, because agricultural landscapes provide habitat for many aquatic and semi‐aquatic organisms. However, not all forms of land use are equal in their capacity to support wildlife. Cattle grazing leads to a change in pasture vegetation structure, whereas conversion to commercial crop‐based agriculture promotes structural and chemical degradation of the ecosystem. From 2010 to 2012, in the Pampa biome, southern Brazil, we modelled anuran occupancy for 39 farmland ponds. Specifically, we determined detection probabilities associated with survey‐ and pond‐specific variables and examined tadpole occupancy in relation to land use in southern Brazil. We recorded eleven anuran species, but only five were detected at levels suitable for occupancy modelling. Species detectability varied with water temperature, extent of floating macrophyte cover, and sampling date. For three species, detection‐adjusted occupancy models indicated a relationship between occupancy and agricultural activities and/or livestock management. Agriculture areas negatively affected occupancy by Odontophrynus americanus and Physalaemus gracilis. The presence of livestock within a 500 m radius positively affected pond occupancy by Hypsiboas pulchellus. Other species were negatively associated with pond area or fish presence. Our results demonstrate that traditional extensive livestock farming can provide a buffer that protects freshwater environments, because it did not greatly modify the grassland matrix. We argue that further species‐based approaches will be critical for developing effective conservation strategies for anurans, particularly in the context of the expanding rice production/exotic forests in southern Brazil.

show abstract

Diversidade de anfíbios anuros de uma área de Pampa no município de São Gabriel, Rio Grande do Sul, Brasil

Cited by 6 publications

References 13 publications

Something is not quite right: Effects of two land uses on anuran diversity in subtropical grasslands

Something is not quite right: Effects of two land uses on anuran diversity in subtropical grasslands

Anuran diversity in ponds associated with soybean plantations

Stop and ask for directions: factors affecting anuran detection and occupancy in Pampa farmland ponds

Contact Info

Product

Resources

About