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Agriculture, habitat loss and spatial patterns of human occupation in a biodiversity hotspot Scientia Agricola
Diniz-Filho,José Alexandre Felizola; Oliveira,Guilherme de; Lobo,Fábio; Ferreira,Laerte Guimarães; Bini,Luis Mauricio; Rangel,Thiago Fernando Lopes Valle Brito.
The Cerrado biome, the second largest biome in Neotropical region, consists of a mosaic of different habitat types, ranging from open grasslands to dense woodlands and dry forests. An intensive recent occupation process has transformed it into the most important region for cattle ranching and intensive commodity crops in Brazil. In this study, a macroecological approach was used to evaluate broad-scale spatial patterns of habitat loss in the Brazilian Cerrado, applying a series of spatial autocorrelation and partial regression analyses to understand how the proportion of remaining natural habitats is correlated with socio-economic variables, expressing different dimensions of human occupation and climatic variation. On average, 59% of the area is occupied...
Tipo: Info:eu-repo/semantics/article Palavras-chave: MODIS; Brazilian Cerrado; Spatial autocorrelation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600007
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Microhabitat preferences of the freshwater prawn Macrobrachium jelskii (Decapoda: Palaemonidae) Iheringia, Sér. Zool.
Silva,Jersei N.; Oliveira,Guilherme de; Rocha,Sérgio S. da.
ABSTRACT We analyzed the microhabitat preferences of Macrobrachium jelskii (Miers, 1877) males and females inhabiting an urban water reservoir in Cruz das Almas, Bahia, Brazil. Prawns were collected monthly, from March 2015 to February 2016, in three microhabitats, using a sieve. Each microhabitat was dominated by one macrophyte species: Eleocharis sp. (M1), Cabomba sp. (M2), and Nymphaea sp. (M3). The prawns were measured (carapace length), and categorized as juvenile males, adult males, juvenile females, non-ovigerous adult females and ovigerous adult females. An analysis of variance (ANOVA) was used to compare the number and size of individuals. The sex ratio and frequency of ovigerous females in the three microhabitats were also calculated. The sex...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrophyte; Population structure; Reproduction; Spatial distribution.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100227
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