A paisagem antrópica sob avaliação: a avifauna em remanescentes florestais, matrizes agrícolas e as implicações para a conservação

Alexandrino, Eduardo Roberto

doi:10.11606/t.91.2015.tde-19102015-174122

Cited by 2 publications

(2 citation statements)

References 137 publications

(293 reference statements)

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“…Using a 2008 land-use map (using ArcGIS 9.0) all bird survey plots were allocated to the interior of the crop, at least 350 meters from any other land use type. This was the largest common distance observed between the studied crops and the other land uses type in all focal landscapes (Alexandrino 2015). Additionally, because of temporal variability in the sugarcane height throughout the growing season, since it can reach up to 3 m high, thus limiting visibility, we used only dirt roads that cross the sugarcane fields to allocate our bird survey plots.…”

Section: Sampling Designmentioning

confidence: 99%

Highly disparate bird assemblages in sugarcane and pastures: implications for bird conservation in agricultural landscapes

Alexandrino¹,

Buechley²,

Forte³

et al. 2019

NBC

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Sugarcane and cattle pastures are two of the most widespread and economically important agricultural landscapes. However, in Brazil, they have not been properly investigated for their importance to native birds and wildlife conservation. Thus, we aim to characterize and compare bird assemblages of sugarcane and cattle pastures; and understand how landscape features within both habitats influence bird assemblages. We surveyed birds in both agricultural habitats over one year, and then investigated the relationship between species richness and composition with landscape diversity, matrix permeability, and the size and distribution of natural forests close to both habitats. We observed 132 species in cattle pastures and only 72 in sugarcane (48% bird community similarity). We further evaluated the richness and relative abundance of avian ecological groups, including habitat specialists and habitat generalists, insectivores, omnivores, granivores and frugivores. All avian groups were higher in pastures, the habitat where landscape heterogeneity and number of scattered trees was higher. Our results show that overall increasing landscape heterogeneity favors an assemblage with higher richness and composed by species with more diverse ecological functions. Therefore, we argue in favor of management practices that incorporate heterogeneity in agricultural landscapes, mainly in sugarcane fields where a homogeneous scheme has been used. Otherwise, the potential of agricultural landscapes for bird conservation will be highly hindered, particularly if the sugarcane sector expands to other agricultural lands.

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Section: Sampling Designmentioning

confidence: 99%

Highly disparate bird assemblages in sugarcane and pastures: implications for bird conservation in agricultural landscapes

Alexandrino¹,

Buechley²,

Forte³

et al. 2019

NBC

View full text Add to dashboard Cite

show abstract

“…Assim, a proximidade entre áreas destinadas à conservação e elementos que incrementem esta métrica são conhecidos por facilitarem o movimento de aves, aumentar sua abundância e a riqueza de espécies (ZURITA et al, 2006;HOLBECH, 2009;KABIGUMILA, 2011;MARTIN et al, 2012;ALEXANDRINO, 2015). (MENDENHALL et al, 2011;MARTIN et al, 2012;HEIM et al, 2015).…”

Section: Resposta Da Diversidade Funcional De Aves à Estrutura Da Paiunclassified

Resposta da assembleia de aves ao planejamento da paisagem em florestas plantadas

Melo¹

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How to expand the supply of ecosystem services in agricultural production areas has been a very current debate, as protected areas do not seem to be sufficient to ensure, for example, the conservation of biodiversity. Birds, for example, are one of biological communities affected by the production which respond rapidly to changes in the landscape. This study aimed to understand how landscape planning of fast growing planted forests can influence bird assembly functional diversity. Therefore, landscapes composed by eucalyptus plantations located at Espírito Santo and southern Bahia, were organized into Landscape Planning Units (UPP). Secondary data from bird surveys conducted from 2005 to 2010 were used. Bird species were characterized into four functional traits: trophic guild, forage extract, habitat and average body mass. Three independent metrics were then calculated to represent functional diversity: functional richness (FRic), functional evenness (FEve) and functional divergence (FDiv). In order to obtain landscape metrics it was used the 2010 land-use map. Based on this map, the diversity of clones (IDCL) and ages (IDID) of forest plantation were calculated, and, for conservation areas, diversity of vegetation typologies (IDNAT), proportion of areas intended for conservation (IPANP), edge density (IDBRD), proportion of nuclear area (IPAC), proximity to native vegetation (IPNAT) and ecological importance value (IVAN). Subsequently, correlation analysis and simple linear regression were applied to these two groups of variables (functional diversity and landscape metrics). Birds surveys registered 218 species and 3455 individuals. The insectivores were the most expressive individuals for the trophic guild. For the forage stratum trait, canopy individuals were the most abundant and forest habitat birds predominated at studied landscapes. A significant relationship was found between the rates of functional diversity of birds and at least one of the landscape metrics. Thus, IPAC was directly related to diversity of functions performed by the bird assembly in the landscape (FRic). IDNAT was negatively related to FEve, indicating that a greater diversity of conservation areas provides a disproportionate variety of functions and abundances in the bird assembly Also, bird assemblages are more divergent (FDiv), having less competition for resources, when the forest fragments are structured connected (IPNAT) and have greater ecological importance (IVAN). In this context, components of bird assembly functional diversity are influenced by the landscape structure in matrix composed by fast-growing planted forests, and, actions that enhance birds functional diversity should be given at the landscape scale in order to keep production and conservation present in the same complex landscape unit.

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A paisagem antrópica sob avaliação: a avifauna em remanescentes florestais, matrizes agrícolas e as implicações para a conservação

Abstract: Tese apresentada para obtenção do título de Doutor em Ciências. Área de concentração: Ecologia Aplicada

Cited by 2 publications

References 137 publications

Highly disparate bird assemblages in sugarcane and pastures: implications for bird conservation in agricultural landscapes

Highly disparate bird assemblages in sugarcane and pastures: implications for bird conservation in agricultural landscapes

Resposta da assembleia de aves ao planejamento da paisagem em florestas plantadas

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