Bat assemblages at a high-altitude area in the Atlantic Forest of southeastern Brazil

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Most Brazilian landscapes lie below 600 m above sea level and studies on the rich Brazilian bat fauna at higher altitudes are scarce. In this study, we investigated bat assemblages associated with different habitats in Chapada do Abanador, Minas Gerais, an area with altitudes ranging from 1000 to 1580 m. Forty-five nights of sampling (153000 m2/h) were performed in semideciduous montane forest, cloud forest and campo de altitude. A total of 137 individuals were captured, belonging to 12 species of the families Phyllostomidae and Vespertilionidae, with a large dominance of the former. Species-accumulation curves reached values close to the asymptote for the campo de altitude and cloud forest habitats, but not for montane forest, suggesting that more species may be added by extending the sampling effort in this habitat. A non-metric multidimensional scaling analysis indicated no strong separation between sampled habitats. Higher abundances of Desmodus rotundus and Histiotus velatus in the campo de altitude were observed, with the latter being exclusively recorded in this habitat. Moreover, a higher abundance of frugivores was observed in forested habitats, while hematophagous, insectivores and nectarivores were more abundant in the campo de altitude. Although presenting lower species richness when compared with environments below 1000 m, the campos de altitude and cloud forests are ecologically important and poorly protected portions of the Atlantic Forest in Minas Gerais, whose biodiversity must be preserved. Our data contributes with a better description of the local fauna and fills gaps on the species distribution for high altitude sites in Brazil.


Assembléia de morcegos em uma área de elevada altitude na Floresta Atlântica do sudeste do Brasil. Grande parte das paisagens brasileiras se encontra abaixo dos 600 m de altitude e os estudos sobre a rica fauna de morcegos brasileiros em elevadas altitudes são escassos. Nesse estudo, investigamos a assembleia de morcegos associada a diferentes habitats na Chapada do Abanador, Minas Gerais, cuja altitude varia de 1000 a 1580 m. Foram conduzidas 45 noites de amostragem (153000 m2/h) na floresta semidecidual montana, floresta nebular e campo de altitude. Foram capturados 137 indivíduos pertencentes a 12 espécies das famílias Phyllostomidae e Vespertilionidae, com grande predominância da primeira. Curvas de acumulação de espécies alcançaram valores próximos à assíntota para o campo de altitude e floresta nebular, mas não para a floresta montana, sugerindo que mais espécies seriam adicionadas com o aumento do esforço amostral nesse habitat. A análise de escalonamento multidimensional não-métrico não indicou forte separação entre os habitats. Entretanto, foi observada uma maior abundância de Desmodus rotundus e Histiotus velatus no campo de altitude, sendo a última exclusiva desse habitat. Além disso, foi observada uma maior abundância de frugívoros nos habitats florestados, enquanto hematófagos e insetívoros foram mais abundantes no campo de altitude. Embora apresentem menor riqueza de espécies quando comparados com ambientes abaixo de 1000 m, os campos de altitude e as florestas nebulares constituem porções ecologicamente importantes e pouco protegidas da Floresta Atlântica em Minas Gerais, cuja biodiversidade deve ser preservada. Nossos dados contribuem com uma melhor descrição da fauna local e preenche lacunas na distribuição de espécies para locais de elevada altitude no Brasil.

Lista taxonómica y estructura del ensamblaje de los mamíferos terrestres del municipio de Tlanchinol, Hidalgo, México

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El municipio de Tlanchinol es una zona importante para la conservación debido a la diversidad de su vegetación y a que ostenta una de las mayores extensiones de bosque mesófilo de montaña dentro del estado de Hidalgo, el cual ocupa el tercer lugar a nivel nacional en cuanto a la cobertura de este tipo de vegetación. Sin embargo, son pocos los trabajos que se han enfocado en el estudio de los mamíferos que habitan estos bosques. El objetivo del trabajo es presentar una lista taxonómica actualizada de los mamíferos terrestres del municipio, así como un análisis de la estructura del ensamblaje con relación a la organización trófica, al tamaño corporal, al tipo de distribución geográfica y al estatus de conservación de las especies. El trabajo de campo se realizó entre noviembre de 2006 y julio de 2008 y se complementó con la revisión de la información publicada. Fueron utilizados métodos directos (trampeo y observaciones) e indirectos (huellas, excretas, animales proporcionados por los pobladores y entrevistas) para obtener la información. Se registraron en total 42 especies, de las cuales 4 son didelfimorfos, 1 cingulata, 2 soricomorfos, 9 carnívoros, 2 artiodáctilos y 24 roedores. Siete especies se consideran en alguna categoría de riesgo (16.6%) y 8 (19%) son endémicas de México. La mayoría de las especies tienen hábitos herbívoros (40.5%) y omnívoros (33.3%) y son de tamaño pequeño (< 100 g). El presente trabajo adiciona 16 nuevas especies para el municipio de Tlanchinol con lo que se amplía y actualiza de manera significativa la información disponible sobre la riqueza de los mamíferos y adiciona información sobre la estructura del ensamblaje de mamíferos presentes en el municipio.


Taxonomic list and assemblage structure of terrestrial mammals of Tlanchinol municipality, Hidalgo, Mexico. The Tlanchinol municipality is an important region of conservation since it harbors a great diversity of vegetation and one of the most extensive cloud forest areas in the state of Hidalgo. This state ranks third place in terms of national coverage of this vegetation type. However, there are few studies that focus on the mammals that inhabit these forests. The aim of this paper is to present an updated taxonomic list of the land mammals of the municipality, and an analysis of the assemblage structure in relation to trophic organization, body size, geographical distribution and the conservation status of the species. The previous was done in order to update all knowledge about terrestrial mammal assemblage in the region. Fieldwork was conducted between November 2006 and July 2008, and it was complemented by a review of published information. We used direct methods (trapping and observations) and indirect methods (tracks, droppings, animals provided by the residents and interviews) to obtain the information. We recorded 42 species: 4 are didelphimorpha species, 1 cingulata, 2 soricomorpha species, 9 carnivores, 2 artiodactyla and 24 rodents. Seven species are considered under some risk category (16.6%) and eight (19%) are endemic to Mexico. Most species are herbivores (40.5%) and omnivores (33.3%), and are small in size (<100 g). In this work we recorded 16 new species for Tlanchinol municipality thus contributing significantly with broad and updated information about richness and assemblage structure of mammals within the municipality.

Small mammal communities in the Sierra de los Cuchumatanes, Huehuetenango, Guatemala

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Very little is known concerning small mammal ecology and their distribution in the highlands of Guatemala. Small mammals were trapped from five different cloud forests in the Sierra de los Cuchumatanes, Huehuetenango, Guatemala. Cloud forest elevations ranged from 2600 m to 3350 m. Most sites had evidence of human disturbance, with only Cerro Bobí having a relatively pristine forest. A total of 13 species was recorded with the species density at sites ranging from six to ten. Accounts of each species are given. The most common species present was Reithrodontomys sumichrasti, except at Cerro Bobí where Peromyscus guatemalensis was most abundant. Differences between years and between seasons (wet versus dry) were minor. Only the site at Cerro Bobí, with relatively pristine cloud forest, appeared to have a species composition that resembled other cloud forests in the highlands of Guatemala. Information on reproduction is summarized.


Comunidades de pequeños mamíferos en la Sierra de los Cuchumatanes, Huehuetenango, Guatemala. Se sabe muy poco sobre la ecología y distribución de micromamíferos en las tierras altas de Guatemala. Los micromamíferos fueron capturados en cinco diferentes bosques nubosos de la Sierra de los Cuchumatanes, Huehuetenango, Guatemala. Las elevaciones de los sitios de muestreo oscilaron entre los 2600 y los 3350 m. La mayoría de los sitios tenían evidencia de perturbación humana, excepto por Cerro Bobí que tenía un bosque relativamente prístino. Se registraron 13 especies con densidad de especies entre sitios de seis a diez. Las especies más comunes presentes fueron Reithrodontomys sumichrasti, excepto en el Cerro Bobí, donde Peromyscus guatemalensis fue la especie más abundante. Las diferencias entre años y entre estaciones (húmeda versus seca) no fueron significativas. Sólo el sitio en el Cerro Bobí, con bosque nuboso relativamente prístino, parece tener una composición de especies similar a otros bosques nubosos de tierras altas de Guatemala. Adicionalmente, se presentan datos sobre las especies capturadas, incluyendo información reproductiva.

Nuevos registros y comentarios sobre la distribución del murciélago blanco común Diclidurus albus (Chiroptera: Emballonuridae) en Ecuador

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Presentamos nuevos registros del murciélago blanco común (Diclidurus albus) en el Ecuador occidental. Se indican seis nuevas observaciones correspondientes a las provincias de Manabí (cinco registros) y Santo Domingo de los Tsáchilas (uno); dos de estos registros constituyen los primeros en manglar para la especie y cinco de ellos son los más próximos al mar que se hayan documentado. La presente nota analiza la cronología de registros y discute sobre la distribución de la especie.


New records and comments on the geographic distribution of the Common Ghost Bat Diclidurus albus (Chiroptera: Emballonuridae) in Ecuador. New records of the Common Ghost Bat (Diclidurus albus) were obtained in western Ecuador. We report six new observations: five in Manabí Province and one in Santo Domingo de los Tsáchilas Province; two of these accounts are the first in mangrove forests for the species, and five the nearest to the sea. We report a chronological review of the Ecuadorian records and discuss about its distribution.