Areas of endemism for passerine birds in the Atlantic forest, South America

Silva, José Maria Cardoso da; Sousa, Marcelo Cardoso de; Castelletti, Carlos Henrique Madeiros

doi:10.1111/j.1466-882x.2004.00077.x

Cited by 208 publications

(39 citation statements)

References 30 publications

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“…The Brazilian Atlantic Forest in the states of Alagoas, Pernambuco, Paraíba and Rio Grande do Norte, known as Pernambuco Endemism Center (henceforth PEC) (Silva et al, 2004) retains just only 11.45% of its original vegetation cover (SOSMA, 2015), and is currently one of the most degraded areas of the whole dominium, considered a hotspot within another hotspot , the entire Atlantic Forest (Myers et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Distribution and conservation of three important bird groups of the Atlantic Forest in north-east Brazil

2016

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The Pernambuco Endemism Center in north-east Brazil has the most fragmented forest cover and the largest number of threatened birds of the whole Atlantic Forest. We analyzed the distribution of three groups of bird species: forest-dependent, endemic and/or threatened using the interpolation method of Inverse Distance Weighting. We also checked the concentration of these birds in protected and unprotected areas, suggesting new sites that need to be protected. The richness concentration of forest-dependent, endemic and/or threatened birds in 123 sites were analysed. There was a greater concentration of the three groups in north Alagoas, south and north Pernambuco, and north and west Paraíba. The distribution of the three groups was almost regular in different vegetation types, although a lower concentration was found in the pioneer formation. There was a greater concentration of birds from all three groups between Pernambuco and Alagoas, and this must be due to the presence of more forest fragments with better structure and vegetation heterogeneity. The protected and unprotected areas hosted important records of endemic and/or threatened birds. We suggested some important places for implementation of new protected areas due to the larger concentrations of the target birds and because they are located within the boundaries of the Important Bird Areas.Keywords: neotropical birds, threatened birds, endemism, Atlantic Forest, conservation. Distribuição e conservação de três importantes grupos de aves na Floresta Atlântica do Nordeste do BrazilResumo O Centro de Endemismo Pernambuco, situado no Nordeste do Brasil, é o setor mais fragmentado e com o maior número de aves ameaçadas de extinção de toda a Mata Atlântica. Foram analisadas as distribuições das aves florestais, endêmicas e/ou ameaçadas de extinção através do método da interpolação 'Inverse Distance Weighting'. Também foi verificada a concentração dessas aves em áreas protegidas e não protegidas, sugerindo novas áreas que necessitam ser protegidas. Foi verificada a concentração da riqueza das espécies de aves florestais, endêmicas e ameaçadas em 123 locais. Houve uma maior concentração dos três grupos no norte de Alagoas, sul e norte de Pernambuco, e norte e oeste da Paraíba. A distribuição dos três grupos foi regular nos distintos tipos vegetacionais, apesar de uma menor concentração nas áreas de formação pioneira. Houve maior concentração das aves dos três grupos entre Pernambuco e Alagoas, devido, provavelmente a presença de uma maior quantidade de fragmentos florestais com melhor estrutura e heterogeneidade vegetal. Tanto as áreas protegidas como as não protegidas possuem importantes registros de aves endêmicas e ameaçadas. Sugerimos alguns locais importantes para a implementação de novas áreas protegidas, tendo como base as áreas com maiores concentrações dos três grupos de aves e dentro dos limites das Important Bird Areas.

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Section: Introductionmentioning

confidence: 99%

Distribution and conservation of three important bird groups of the Atlantic Forest in north-east Brazil

2016

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“…The study area is highly relevant because it is part of one of the world's 25 biodiversity hotspots (Myers et al, 2000;Mittermeier et al, 2005), and presents high levels of endemism for plants and vertebrates (Thomas et al, 1998;Silva et al, 2004). Furthermore, the habitat is highly fragmented, increasing the expectancy of loss of many species (Silva and Tabarelli, 2000).…”

Section: Study Areamentioning

confidence: 99%

Effects of climate and forest structure on palms, bromeliads and bamboos in Atlantic Forest fragments of Northeastern Brazil

Hilário

Toledo

2016

Braz. J. Biol.

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Palms, bromeliads and bamboos are key elements of tropical forests and understanding the effects of climate, anthropogenic pressure and forest structure on these groups is crucial to forecast structural changes in tropical forests. Therefore, we investigated the effects of these factors on the abundance of these groups in 22 Atlantic forest fragments of Northeastern Brazil. Abundance of bromeliads and bamboos were assessed through indexes. Palms were counted within a radius of 20 m. We also obtained measures of vegetation structure, fragment size, annual precipitation, precipitation seasonality and human population density. We tested the effects of these predictors on plant groups using path analysis. Palm abundance was higher in taller forests with larger trees, closed canopy and sparse understory, which may be a result of the presence of seed dispersers and specific attributes of local palm species. Bromeliads were negatively affected by both annual precipitation and precipitation seasonality, what may reflect adaptations of these plants to use water efficiently, but also the need to capture water in a regular basis. Bamboos were not related to any predictor variable. As climate and forest structure affected the abundance of bromeliads and palms, human-induced climatic changes and disturbances in forest structure may modify the abundance of these groups. In addition, soil properties and direct measurements of human disturbance should be used in future studies in order to improve the predictability of models about plant groups in Northeastern Atlantic Forest.Keywords: Arecaceae, Bambusoideae, Bromeliaceae, disturbance, rainfall, secondary forest fragments. Efeitos do clima e da estrutura da vegetação em palmeiras, bromélias e bambus em fragmentos de Mata Atlântica no nordeste brasileiro ResumoPalmeiras, bromélias e bambus são importantes elementos das florestas tropicais e, entender os efeitos do clima, pressão antrópica e estrutura da floresta nesses grupos é crucial para prever alterações estruturais em florestas tropicais. Portanto, nós investigamos os efeitos desses fatores na abundância desses grupos vegetais em 22 fragmentos de Mata Atlântica no nordeste brasileiro. Abundâncias de bromélias e bambus foram registradas através de índices. Palmeiras foram contadas em um raio de 20 m. Nós também obtemos medidas da estrutura da vegetação, tamanho de fragmento, precipitação anual, sazonalidade na precipitação e densidade populacional humana. Nós testamos os efeitos desses preditores nos grupos vegetais através de análises de caminhos. A abundância de palmeiras foi maior em florestas mais altas, com árvores mais grossas, dossel fechado e sub-bosque aberto, o que deve refletir a presença de dispersores de sementes e atributos específicos das espécies de palmeiras locais. Bromélias foram negativamente afetadas pela precipitação anual e pela sazonalidade na precipitação, o que deve refletir adaptações dessas plantas para o uso eficiente da água, mas também a necessidade de captar água regularmente. Bambus n...

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“…On a regional scale, it seems to be difficult to produce a single map of hotspots for different groups of species that differ ecologically [6], which is based on different diversity measures [4]. The detection of hotspots in this study uses one ecologically similar group of high conservation value species as hotspot indicators, as well as focal habitat indicators, to detect the distribution of suitable environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

The detection of thermophilous forest hotspots in Poland using geostatistical interpolation of plant richness

Kiedrzyński¹,

Jakubowska-Gabara²

2014

Acta Soc Bot Pol

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Attempts to study biodiversity hotspots on a regional scale should combine compositional and functionalist criteria. The detection of hotspots in this study uses one ecologically similar group of high conservation value species as hotspot indicators, as well as focal habitat indicators, to detect the distribution of suitable environmental conditions. The method is assessed with reference to thermophilous forests in Poland -key habitats for many rare and relict species. Twenty-six high conservation priority species were used as hotspot indicators, and ten plant taxa characteristic of the Quercetalia pubescenti-petraeae phytosociological order were used as focal habitat indicators. Species distribution data was based on a 10 × 10 km grid. The number of species per grid square was interpolated by the ordinary kriging geostatistical method. Our analysis largely determined the distribution of areas with concentration of thermophilous forest flora, but also regional disjunctions and geographical barriers. Indicator species richness can be interpreted as a reflection of the actual state of habitat conditions. It can also be used to determine the location of potential species refugia and possible past and future migration routes.

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Areas of endemism for passerine birds in the Atlantic forest, South America

Cited by 208 publications

References 30 publications

Distribution and conservation of three important bird groups of the Atlantic Forest in north-east Brazil

Distribution and conservation of three important bird groups of the Atlantic Forest in north-east Brazil

Effects of climate and forest structure on palms, bromeliads and bamboos in Atlantic Forest fragments of Northeastern Brazil

The detection of thermophilous forest hotspots in Poland using geostatistical interpolation of plant richness

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