Human development and biodiversity conservation in Brazilian Cerrado

Rangel, Thiago F.; Bini, Luis Maurício; Diniz‐Filho, José Alexandre Felizola; Pinto, Míriam Plaza; Carvalho, Priscilla

doi:10.1016/j.apgeog.2006.09.009

Cited by 38 publications

(41 citation statements)

References 24 publications

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“…In general, the Central-Western and Central-Southern regions of this biome have been encroached by agricultural advancement and pastureland development (Rangel et al, 2007). These regions have also been transformed into sugarcane culture for the production of biofuels, which have had significant impacts on the ecology of the Cerrado.…”

Section: Implications For Ecology and Conservationmentioning

confidence: 99%

Combining multiple models to predict the geographical distribution of the Baru tree (Dipteryx alata Vogel) in the Brazilian Cerrado

et al. 2010

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The Brazilian Cerrado is a biome of great biodiversity, but detailed information about the diversity and distribution of species in this region is still insufficient for both testing ecological hypotheses and for conservation purposes. Among native plants in the Cerrado, Dipteryx alata Vogel (commonly known as the "Baru" tree), has a high potential for exploitation. The aims of this paper were to predict the potential spatial distribution of D. alata in the Brazilian Cerrado utilising five different niche modelling techniques. These techniques usually provide distinct results, so it may be difficult to choose amongst them. To adjust for this uncertainty, we employ an ensemble forecasting approach to predict the spatial distribution of the Baru tree. We accumulated a total of 448 occurrence points and modelled the subsequent predicted occurrences using seven climatic variables. Five different presence-only ecological niche modelling techniques (GARP, Maxent, BIOCLIM, Mahalanobis Distance and Euclidean Distance) were used and the performance of these models was compared using Receiver Operating Characteristics (ROC) and the Area Under the Curve (AUC). All models presented AUC values higher than 0.68, and GARP presented the highest AUC value, whereas Euclidean Distance presented the lowest. The ensemble forecasting approach suggested a high suitability for the occurrence of the Baru tree in the Central-Western region of the Brazilian Cerrado. Our study demonstrated that modelling species distribution using ensemble forecasting can be an important computational tool for better establishing sampling strategies and for improving our biodiversity knowledge to better identify priority areas for conservation. For the Baru tree, we recommend priority actions for conservation in the central region of the Cerrado Biome.Keywords: conservation, niche modelling, ensemble forecast, Brazilian Cerrado. Combinando múltiplos modelos para predizer a distribuição geográfica do Barueiro (Dipteryx alata Vogel) no Cerrado brasileiroResumo O Cerrado brasileiro é considerado um bioma de grande biodiversidade, no entanto, informações detalhadas sobre a diversidade e distribuição das espécies ainda é insuficiente para testar hipóteses ecológicas e para propostas de conservação biológica. Dentre as plantas do cerrado com amplo potencial de exploração, destaca-se Dipteryx alata Vogel, (vulgarmente conhecida como Barueiro). O objetivo deste trabalho foi predizer a distribuição geográfica potencial de D. alata no Cerrado brasileiro, utilizando cinco diferentes técnicas de modelagem de nicho. Essas técnicas usualmente apresentam distintos resultados, dificultando a escolha de um modelo. Para corrigir essa incerteza, usamos a estratégia de combinar os modelos gerados (ensamble forecasting) para predizer a distribuição espacial potencial do Baru. Foi acumulado um total de 448 pontos de ocorrência para as espécies e modeladas, usando sete variáveis climáticas. Foram utilizadas cinco diferentes técnicas de modelagem de nicho usando-se dados ...

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Section: Implications For Ecology and Conservationmentioning

confidence: 99%

Combining multiple models to predict the geographical distribution of the Baru tree (Dipteryx alata Vogel) in the Brazilian Cerrado

et al. 2010

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“…As extensões de ocorrência das 87 espécies, com reprodução no Cerrado, da família Emberizidae (Ridgely e Tudor, 1989;Silva, 1995), ou seja, a região do bioma que cada espécie ocupa, foram mapeadas sobre essa malha. As presenças (1) e ausências (0) de cada espécie, em cada uma das células, foram utilizadas na construção de uma matriz binária (com as espécies nas colunas e as células nas linhas).…”

Section: Materials E Métodos Materials E Métodos Materials E Métodos Matunclassified

“…Maringá, v. 30, n. 1, p. 67-72, 2008IBGE (2004a. Estas variáveis tiveram seus valores médios calculados para as 181 células do Cerrado e, assim, obteve-se uma matriz de dados de 23 variáveis socioeconômicas para as 181 células (Rangel et al, 2007). A descrição das variáveis se encontra na Tabela1.…”

Section: Materials E Métodos Materials E Métodos Materials E Métodos Matunclassified

Riqueza de espécies de emberizídeos e conflitos de conservação no Cerrado brasileiro

Barreto

Oliveira

Pinto

et al. 2008

Acta Sci. Biol. Sci.

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“…Rodríguez et al, 2005). We used five environmental variables related to ambient energy, mea- Table 1 -Codes and meaning of socio-economic variables used in this study and resulted from Rangel et al (2007). sured by Potential EvapoTranspiration (PET) and mean monthly annual temperature (TEMP), to water-energy balance.…”

Section: Datamentioning

confidence: 99%

“…Data on social and economic variables that are likely to indicate human occupation were compiled from the Brazilian Institute of Geography and Statistics (IBGE) (see www.ibge.gov.br) and Institute of Applied Economic Research (IPEA) (see www.ipea.gov.br). In all, 23 variables were selected to express both the general patterns of human occupation (population size, growth rates, spatial subdivisions of the agricultural space and size of the road network) and the regional variations in agricultural and agro-industrial characteristics, which mainly reflect a contrast between more traditional and more capital-intensive agricultural practices (see Table 1 and Rangel et al, 2007 for a detailed description on the variables used).…”

Section: Introductionmentioning

confidence: 99%

Agriculture, habitat loss and spatial patterns of human occupation in a biodiversity hotspot

Diniz‐Filho

Oliveira

Lobo

et al. 2009

Sci. agric. (Piracicaba, Braz.)

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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 by natural remnants at the spatial scale analyzed, although patterns of habitat loss are strongly spatially structured, with a Moran's I spatial autocorrelation coefficient equal to 0.825 ± 0.055 (p < 0.001). The partial regression analysis explains 89% of variation in percentage of natural remnants. The highest proportion of variance is explained by the multiple overlap between human occupation, climatic variation and geographic structure (67%), as well as by the climatically structured component of human occupation (8%). Based on the space-time interactive process of human occupation in the biome, future scenarios should be rather pessimistic. If the wave of human occupation continues towards the northern parts of the biome, as expected, we can predict that percentages will decline rapidly including even stronger losses of habitat at the biome scale. Key words: MODIS, Brazilian Cerrado, spatial autocorrelation AGRICULTURA, PERDA DE HÁBITAT E PADRÕES ESPACIAIS DE OCUPAÇÃO HUMANA EM UM "HOTSPOT" DE BIODIVERSIDADERESUMO: O bioma Cerrado é o segundo maior da região Neotropical e é formado por mosaico de diferentes tipos de hábitats, desde campos abertos até florestas densas. Um recente e intensivo processo de ocupação humana tem transformado essa eco-região em uma das mais importantes regiões para agropecuária no Brasil. Uma abordagem macroecológica foi utilizada para elucidar padrões em amplas escalas espaciais de perdas de hábitat no Cerrado brasileiro, implementando técnicas de autocorrelação espacial e análises de regressão parcial para entender como a proporção de remanescentes de vegetação natural está correlacionada com variáveis socioeconômicas, expressando diferentes dimensões de ocupação humana e com variações climáticas. Em média, 59% da área é ocupada por remanescentes de vegetação, na escala da análise, mesmo que os padrões de perda de hábitat estejam fortemente estruturados no espaço, com o coeficiente de autocorrelação espacial de I de Moran igual a 0,825 ± 0,055 (p < 0 ,001). As análises de regressão parcial explicaram 89% da variação no percentual de remanescente de vegetação. A maior proporção da variância é explicada pela sobreposição múltipla entre a ocupação humana, variação climática e a estrutura geográfica (67%), bem como pelo co...

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Human development and biodiversity conservation in Brazilian Cerrado

Cited by 38 publications

References 24 publications

Combining multiple models to predict the geographical distribution of the Baru tree (Dipteryx alata Vogel) in the Brazilian Cerrado

Combining multiple models to predict the geographical distribution of the Baru tree (Dipteryx alata Vogel) in the Brazilian Cerrado

Riqueza de espécies de emberizídeos e conflitos de conservação no Cerrado brasileiro

Agriculture, habitat loss and spatial patterns of human occupation in a biodiversity hotspot

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