The influence of fire and livestock grazing on the assemblage of non-flying small mammals in grassland-Araucaria Forest ecotones, southern Brazil

Pedó, Ezequiel; Freitas, Thales Renato Ochotorena de; Hartz, Sandra Maria

doi:10.1590/s1984-46702010000400005

Cited by 16 publications

(6 citation statements)

References 36 publications

(21 reference statements)

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“…Negative influence is demonstrated by the decrease of shelters' accessibility, reduction of nutritional base abundance and greater risk of predator's attack (Flowerdew, 2001). Diversity and number of small mammals that are particularly tied to grassland ecosystems is greater on the areas protected from livestock (Pedo et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Impact of Sheep Grazing on Small Mammals Diversity in Lower Mountain Coniferous Forest Glades

Ważna¹

2016

Appl Ecol Env Res

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Abstract. Sheep grazing has once been a traditional mode of exploitation of forest as well as alpine zones in the majority of European montane regions. Nowadays, in Tatra Mts, sheep grazing is limited to a number of glades of anthropogenic origin, primarily as a method of protection against overgrowing with trees. Results of the present study demonstrate that sheep grazing causes a decrease in species diversity of small mammals Micromammalia in forest zone glades. The values of biodiversity indicators in sheepgrazed glades are lower than those in the non-managed or mown ones. On sheep-grazed glades, a lower biodiversity of Soricomorpha and a domination of common vole Microtus arvalis have been found.

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Section: Discussionmentioning

confidence: 99%

Impact of Sheep Grazing on Small Mammals Diversity in Lower Mountain Coniferous Forest Glades

Ważna¹

2016

Appl Ecol Env Res

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“…Cattle affect heterogeneity of herbaceous and understory strata through trampling and grazing, preventing the occurrence of many small mammal species (Pedó et al. ; Luza et al. ).…”

Section: Discussionmentioning

confidence: 99%

“…), generating variations in species composition, species richness and total abundance in nonvolant small mammal assemblages across grassland‐forest ecotones (Pedó et al. ; A. L. Luza, unpubl. data).…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic and morphological relationships between nonvolant small mammals reveal assembly processes at different spatial scales

Luza

Gonçalves

Hartz

2015

Ecology and Evolution

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The relative roles of historical processes, environmental filtering, and ecological interactions in the organization of species assemblages vary depending on the spatial scale. We evaluated the phylogenetic and morphological relationships between species and individuals (i.e., inter- and intraspecific variability) of Neotropical nonvolant small mammals coexisting in grassland-forest ecotones, in landscapes and in regions, that is, three different scales. We used a phylogenetic tree to infer evolutionary relationships, and morphological traits as indicators of performance and niche similarities between species and individuals. Subsequently, we applied phylogenetic and morphologic indexes of diversity and distance between species to evaluate small mammal assemblage structures on the three scales. The results indicated a repulsion pattern near forest edges, showing that phylogenetically similar species coexisted less often than expected by chance. The strategies for niche differentiation might explain the phylogenetic repulsion observed at the edge. Phylogenetic and morphological clustering in the grassland and at the forest interior indicated the coexistence of closely related and ecologically similar species and individuals. Coexistence patterns were similar whether species-trait values or individual values were used. At the landscape and regional scales, assemblages showed a predominant pattern of phylogenetic and morphological clustering. Environmental filters influenced the coexistence patterns at three scales, showing the importance of phylogenetically conserved ecological tolerances in enabling taxa co-occurrence. Evidence of phylogenetic repulsion in one region indicated that other processes beyond environmental filtering are important for community assembly at broad scales. Finally, ecological interactions and environmental filtering seemed important at the local scale, while environmental filtering and historical colonization seemed important for community assembly at broader scales.

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“…In some areas of the world, the implementation of agro-ecosystems have increased habitat spatial heterogeneity with the maintenance of both agriculture and native patches in the landscape, which have been beneficial for many mammals, including some generalist species, as well as several opportunistic species (Mills et al, 1991;MacDonald et al, 2007) (Bonvicino & Weksler, 1998) and frequently show high abundances at the edge of small forest fragments, grasslands, and in abandoned pastures (Olifiers et al, 2005). Also, O. nigripes is highly mobile, which helps to reduce the chance of predation, and is efficient in searching for resources in habitats with low vegetation cover (Pedó et al, 2010;Taraborelli et al, 2003). In the first cycle, O. flavescens was the most dominant and found in both, the Atlantic Forest and gallery forest in Cerrado (Patton et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Use of silvicultural landscapes by small mammals in the state of São Paulo, Brazil

Uribe¹,

Cristina²

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Use of silvicultural landscapes by small mammals in the state of São Paulo, Brazil Studies in agricultural landscapes have shown that anthropogenic environments may be relevant to wildlife species. Given the extent of these areas efficient research methods are needed to assess its ecological value in terms of local diversity, such as the use of biological indicators. The main goal here was to evaluate the possible relationship between the native vegetation biomass and diversity of small mammals in a silvicultural landscape of São Paulo. The study was developed at Fazenda Três Lagoas, which is part of the "Programa de Pesquisa em Biodiversidade" (PPBio), at Angatuba municipality, State of São Paulo, and lasted nine months. From May 2015 to March 2016 nine sampling campaigns were carried over a grid of 15 pitfall traps, five in Eucalyptus plantations, five in native vegetation and five in abandoned pastures. In the Chapter 1 the distribution and abundance patterns of small mammals on a silvicultural landcape during the early second cycle of Eucalyptus plantation in Southeastern Brazil was evaluated. A total of 672 individuals from 15 species of the orders Rodentia (9 spp.) and Didelphimorphia (6 spp.) were captured and five new species were detected in the study area in comparison to the first cycle. Although these species are predominantly generalists, there were differences in the abundance of small mammals in the three environments. The presence of native vegetation patches associated with riparian areas and abandoned pastures and the role of small mammals as a food resource for predators on a trophic structure, gives a certain conservation value to silvicultural landscapes in southeastern Brazil. In the Chapter 2 the relationship between landscape metrics and patterns of diversity, distribution and abundance of small mammals in a silvicultural landscape were evaluated. The species richness and family diversity of small mammals have been predominantly determined by the percentage of native vegetation. However, the abundance of small mammals can be determined by an indirect estimate of the native vegetation biomass (i.e., NDVI), which can be considered a 3D landscape metric as it is related to volume. Therefore, to succeed in assessing the value of agricultural landscape, future studies should consider landscape context, as well as the landscape metrics associated with geospatial data analysis and the distinct responses of species.

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The influence of fire and livestock grazing on the assemblage of non-flying small mammals in grassland-Araucaria Forest ecotones, southern Brazil

Cited by 16 publications

References 36 publications

Impact of Sheep Grazing on Small Mammals Diversity in Lower Mountain Coniferous Forest Glades

Impact of Sheep Grazing on Small Mammals Diversity in Lower Mountain Coniferous Forest Glades

Phylogenetic and morphological relationships between nonvolant small mammals reveal assembly processes at different spatial scales

Use of silvicultural landscapes by small mammals in the state of São Paulo, Brazil

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