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A small remnant of Atlantic Forest does not support a high bird richness: a case study based on community-level occupancy models
by
Pichorim, Mauro
, Salustio-Gomes, Carlos
in
assembleia de espécies
/ Birds
/ detecção imperfeita
/ Dry season
/ Environmental factors
/ Estimates
/ fatores ambientais
/ floresta estacional semidecidual
/ Forests
/ Habitat fragmentation
/ Habitat selection
/ Habitats
/ Herpsilochmus pectoralis
/ imperfect detection
/ Leptodon forbesi
/ Modelling
/ multiescala
/ multiscale
/ Penelope superciliaris
/ Protected areas
/ Rainy season
/ restinga
/ seasonal semideciduous forest
/ species assemblage
/ Species richness
/ Thalurania watertonii
/ Threatened species
/ Wet season
/ Áreas protegidas
2025
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A small remnant of Atlantic Forest does not support a high bird richness: a case study based on community-level occupancy models
by
Pichorim, Mauro
, Salustio-Gomes, Carlos
in
assembleia de espécies
/ Birds
/ detecção imperfeita
/ Dry season
/ Environmental factors
/ Estimates
/ fatores ambientais
/ floresta estacional semidecidual
/ Forests
/ Habitat fragmentation
/ Habitat selection
/ Habitats
/ Herpsilochmus pectoralis
/ imperfect detection
/ Leptodon forbesi
/ Modelling
/ multiescala
/ multiscale
/ Penelope superciliaris
/ Protected areas
/ Rainy season
/ restinga
/ seasonal semideciduous forest
/ species assemblage
/ Species richness
/ Thalurania watertonii
/ Threatened species
/ Wet season
/ Áreas protegidas
2025
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A small remnant of Atlantic Forest does not support a high bird richness: a case study based on community-level occupancy models
by
Pichorim, Mauro
, Salustio-Gomes, Carlos
in
assembleia de espécies
/ Birds
/ detecção imperfeita
/ Dry season
/ Environmental factors
/ Estimates
/ fatores ambientais
/ floresta estacional semidecidual
/ Forests
/ Habitat fragmentation
/ Habitat selection
/ Habitats
/ Herpsilochmus pectoralis
/ imperfect detection
/ Leptodon forbesi
/ Modelling
/ multiescala
/ multiscale
/ Penelope superciliaris
/ Protected areas
/ Rainy season
/ restinga
/ seasonal semideciduous forest
/ species assemblage
/ Species richness
/ Thalurania watertonii
/ Threatened species
/ Wet season
/ Áreas protegidas
2025
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A small remnant of Atlantic Forest does not support a high bird richness: a case study based on community-level occupancy models
Journal Article
A small remnant of Atlantic Forest does not support a high bird richness: a case study based on community-level occupancy models
2025
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Overview
Environmental features are predictors that assist in identifying patterns of species richness. To obtain accurate richness estimates, occupancy modeling is a useful tool because it can encompass variables at multi-scales and considers imperfect detection. We estimated the relative bird richness in a protected area in the Atlantic Forest to understand habitat requirements of a species assemblage as a function of environmental factors. Our study spanned dry and rainy seasons and covered four habitats (seasonal semideciduous forest, restinga, a planted experimental forest, and patch edge) across 42 sampling sites. Using point counts, we recorded all bird species during three visits at each site. We estimated species richness across temporal and spatial scales using community occupancy modeling. We recorded 86 species where four were threatened: the Pectoral Antwren (Herpsilochmus pectoralis), the White-collared Kite (Leptodon forbesi), the Rusty-margined Guan (Penelope superciliaris), and the Long-tailed Woodnymph (Thalurania watertonii). Relative species richness in the rainy season (Ψ = 0.31–0.66) was lower compared to the dry season (Ψ = 0.37–0.76). Open habitats had a higher richness (Ψ of patch edge = 0.66 and 0.76, Ψ of restinga = 0.51 and 0.62) than seasonal semideciduous forest (Ψ = 0.31 and 0.37) and planted experimental forest (Ψ = 0.36 and 0.40). Rates of species gain varied among habitats (γ = 0.15–0.59), unlike species loss, which did not vary (ε = 0.15). Richness at each site was negatively affected by pond distance, tree cover, and diameter of tree trunks. The low richness observed in seasonal semideciduous forest is probably a reflection of negative impacts on the area, such as the effects of forest fragmentation. We also highlight that occupancy modeling results in reliable estimates for ecological inferences, aiding in understanding patterns that can be evaluated and used in habitats and community conservation strategies. As características ambientais são preditores que ajudam a identificar padrões de riqueza de espécies. Para obter estimativas precisas de riqueza, a modelagem de ocupação é uma ferramenta útil porque pode abranger variáveis em múltiplas escalas e considera a detecção imperfeita. Estimamos a riqueza relativa de aves em uma área protegida na Mata Atlântica para compreender as exigências de habitat da assembleia de espécies em função de fatores ambientais. Nosso estudo abrangeu as estações seca e chuvosa e cobriu quatro habitats (floresta estacional semidecidual, restinga, floresta experimental plantada e borda da mancha) em 42 sítios de amostragem. Usando contagem de pontos, registramos todas as espécies de aves durante três censos em cada sítio. Estimamos a riqueza de espécies em escalas temporais e espaciais usando modelagem de ocupação para comunidades. Registramos 86 espécies, onde quatro estão ameaçadas de extinção: o chorozinho-de-papo-preto (Herpsilochmus pectoralis), o gavião-gato-do-nordeste (Leptodon forbesi), a jacupemba (Penelope superciliaris) e o beija-flor-de-costasvioleta (Thalurania watertonii). A riqueza relativa de espécies na estação chuvosa (Ψ = 0,31–0,66) foi menor em comparação com a estação seca (Ψ = 0,37–0,76). Os habitats abertos apresentaram maior riqueza (Ψ da borda da mancha = 0,66 e 0,76, Ψ da restinga = 0,51 e 0,62) do que a floresta estacional semidecidual (Ψ = 0,31 e 0,37) e a floresta experimental plantada (Ψ = 0,36 e 0,40). As taxas de ganho de espécies variaram entre habitats (γ = 0,15–0,59), ao contrário da perda de espécies, que não variou (ε = 0,15). A riqueza em cada sítio foi afetada negativamente pela distância das lagoas, cobertura de árvores e diâmetro dos troncos de árvores. A baixa riqueza observada na floresta estacional semidecidual é provavelmente um reflexo dos impactos negativos sobre a área, tais como os efeitos da fragmentação florestal. Também destacamos que a modelagem de ocupação resulta em estimativas confiáveis para inferências ecológicas, auxiliando na compreensão de padrões que podem ser avaliados e usados em habitats e estratégias de conservação de comunidades. ; ; ; ; ; ;
Publisher
Wilson Ornithological Society
Subject
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