10. Ecophysiology of Woody Plants

Colli, Guarino R.; Bastos, Rogério Pereira; Araújo, Alexandre F. B. de

doi:10.7312/oliv12042-011

Cited by 125 publications

(73 citation statements)

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“…Os resultados encontrados no presente estudo corroboram outros estudos realizados focados na distribuição local de lagartos em áreas de Cerrado (Colli et al 2002, Nogueira et al 2005), onde as Matas de galeria abrigaram menor número de espécies quando comparada com áreas abertas. De acordo com Colli et al (2002) e Rodrigues (2005b), as Matas de galeria não apresentam fauna própria específica e muitas espécies encontradas nos Cerrados abertos também utilizam essas áreas.…”

Section: Discussionunclassified

“…De acordo com Colli et al (2002) e Rodrigues (2005b), as Matas de galeria não apresentam fauna própria específica e muitas espécies encontradas nos Cerrados abertos também utilizam essas áreas.…”

Section: Discussionunclassified

“…É uma espécie típica de formações abertas, habitando preferencialmente fisionomias campestres (Valdujo 2003, Nogueira et al 2005. Sua associação com áreas de Cerrado nesse estudo esteve mais relacionada com áreas abertas, assim como relatado também por Nogueira et al (2005) e Sousa et al (2010), podendo mais raramente ocorrer também em hábitats florestados, como matas de galeria (Colli et al 2002). Mabuya frenata foi a única espécie encontrada em todas as fitofisionomias.…”

Section: Discussionunclassified

“…A maioria dos espécimes de P. acutirostris capturados neste estudo foi coletada nas armadilhas de interceptação e queda, constatando que a espécie pode ser encontrada no chão, como também observado por Vitt & Lacher (1981). Enyalius bilineatus é encontrada no sudeste e leste de Minas Gerais (Jackson 1978, Sousa et al 2010) e é a única espécie do gênero Enyalius associada ao Cerrado, em áreas florestadas, principalmente em matas de galeria (Bertolotto et al 2002, Colli et al 2002, Bertoluci et al 2009, Sousa et al 2010. Contudo, neste trabalho apenas um indivíduo de E. bilineatus foi registrado em matas de galeria, sendo em sua maioria registrados no Cerrado sensu stricto.…”

Section: Discussionunclassified

“…O tipo de habitat fossorial encontrado em algumas espécies dificulta na amostragem destas, como observado para a espécie Ophiodes striatus em área de Cerrado. Colli et al (2002) também constataram a presença dessa espécie em áreas de Cerrado, porém sempre associada a áreas florestadas e, na região core Tabela 1. Composição da fauna de lagartos da Reserva Biológica UnilavrasBoqueirão.…”

Section: Discussionunclassified

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Lagartos de áreas de cerrado na Reserva Biológica Unilavras-Boqueirão, Ingaí, Sul de Minas Gerais, Brasil

et al. 2012

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Studies with emphasis on assessment and quantification of species biological diversity should be recognized as important tools in the process of knowledge, especially where basic data are scarce. This study was conducted at the Reserva Biológica Unilavras-Boqueirão (21° 20' 47" S and 44° 59' 27" W) inserted in the Cerrado, Ingaí municipality, southern Minas Gerais, southeastern Brazil. We aimed to characterize and understand local lizard species. Sampling occurred between June 2008 and February 2010 in weekly excursions during the day in the field. Captures were carried out by means of pitfall traps, distributed in six sets, three in Cerrado sensu stricto and three in the gallery forest, making a sampling effort of 6120 buckets per day. Animals viewed, occasionally found or collected by third parties were also included in the sample. A total of 10 lizard species from seven families were captured. The richest vegetation type was the Cerrado sensu stricto with nine species. Only Heterodactylus imbricatus was restricted to gallery forests, where pitfalls sampled 74.12% of lizards captured. The lizard fauna is well represented in the area with species typical of open areas as Ameiva ameiva, Polychrus acutirostris and Mabuya frenata. The species Urostrophus vautieri and Heterodactylus imbricatus, not yet reported for the Cerrado, were also found in the area.

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Lagartos de áreas de cerrado na Reserva Biológica Unilavras-Boqueirão, Ingaí, Sul de Minas Gerais, Brasil

et al. 2012

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Large net CO₂ loss from a grass‐dominated tropical savanna in south‐central Brazil in response to seasonal and interannual drought

et al. 2016

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The savanna vegetation of Brazil (Cerrado) accounts for 20–25% of the land cover of Brazil and is the second largest ecosystem following Amazonian forest; however, Cerrado mass and energy exchange is still highly uncertain. We used eddy covariance to measure the net ecosystem CO2 exchange (NEE) of grass‐dominated Cerrado (campo sujo) over 3 years. We hypothesized that soil water availability would be a key control over the seasonal and interannual variations in NEE. Multiple regression indicated that gross primary production (GPP) was positively correlated (Pearson's r = 0.69; p < 0.001) with soil water content, radiation, and the Moderate Resolution Imaging Spectroradiometer (MODIS)‐derived enhanced vegetation index (EVI) but negatively correlated with the vapor pressure deficit (VPD), indicating that drier conditions increased water limitations on GPP. Similarly, ecosystem respiration (Reco) was positively correlated (Pearson's r = 0.78; p < 0.001) with the EVI, radiation, soil water content, and temperature but slightly negatively correlated with rainfall and the VPD. While the NEE responded rapidly to temporal variations in soil water availability, the grass‐dominated Cerrado stand was a net source of CO2 to the atmosphere during the study period, which was drier compared to the long‐term average rainfall. Cumulative NEE was approximately 842 gC m−2, varying from 357 gC m−2 in 2011 to 242 gC m−2 in 2012. Our results indicate that grass‐dominated Cerrado may be an important regional CO2 source in response to the warming and drying that is expected to occur in the southern Amazon Basin under climate change.

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Environmental factors related to anuran assemblage composition, richness and distribution at four large rivers under varied impact levels in southeastern Brazil

Souza¹

2011

River Research & Apps

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The margins of large rivers are usually impacted by human settlements and activities, which may affect the occupancy and use of riparian habitats by many organisms. Among vertebrates, amphibians are likely the most sensitive to environmental changes, and they can be used as a model to identify attributes of the riparian habitats that are important for the maintenance of high species richness and functional diversity. We studied anuran assemblages in four large rivers of the Velhas River basin in southeastern Brazil during one year, focusing on features of the rivers and riparian habitats that influence species distribution. We tested whether a river under greater anthropogenic impact would shelter less species compared to three rivers of equivalent size under lower impact level, and whether lower species richness related to lower availability of preferred microhabitats. We found soil type at river margin and riparian vegetation structure to be the main factors influencing anuran distribution. Species richness was positively related to microhabitat diversity and availability of preferred microhabitats, which were the lowest in the most impacted river. Most species recorded at the rivers were not breeding there, and were present in larger numbers during the dry season, when temporary bodies of water dry at the vicinities of the large rivers. Conservation of a broad extension of the riparian habitat (200 m or more) would be efficient both to provide appropriate microhabitats for anurans and to maintain connectivity between breeding sites and large, permanent rivers used by several species during the dry season.

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10. Ecophysiology of Woody Plants

Cited by 125 publications

References 28 publications

Lagartos de áreas de cerrado na Reserva Biológica Unilavras-Boqueirão, Ingaí, Sul de Minas Gerais, Brasil

Lagartos de áreas de cerrado na Reserva Biológica Unilavras-Boqueirão, Ingaí, Sul de Minas Gerais, Brasil

Large net CO₂ loss from a grass‐dominated tropical savanna in south‐central Brazil in response to seasonal and interannual drought

Environmental factors related to anuran assemblage composition, richness and distribution at four large rivers under varied impact levels in southeastern Brazil

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10. Ecophysiology of Woody Plants

Cited by 125 publications

References 28 publications

Lagartos de áreas de cerrado na Reserva Biológica Unilavras-Boqueirão, Ingaí, Sul de Minas Gerais, Brasil

Lagartos de áreas de cerrado na Reserva Biológica Unilavras-Boqueirão, Ingaí, Sul de Minas Gerais, Brasil

Large net CO2 loss from a grass‐dominated tropical savanna in south‐central Brazil in response to seasonal and interannual drought

Environmental factors related to anuran assemblage composition, richness and distribution at four large rivers under varied impact levels in southeastern Brazil

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Large net CO₂ loss from a grass‐dominated tropical savanna in south‐central Brazil in response to seasonal and interannual drought