RESUMO

Brazil has a high diversity of birds and presents the largest number of threatened bird species in the neotropical region. Even so, there are gaps in the bird knowledge, especially in ecotonal montane regions. Given this panorama, this study aimed to analyse the bird community distribution (richness, composition, and beta diversity between phytophysiognomies) of an ecotonal montane landscape of southeastern Brazil, with the purpose of detecting substitution patterns of bird species on a meso-scale. Using bird data performed during the years 1998 to 2015 in 46 sampling points, we found high bird richness in montane phytophysiognomies along an ecotone between Cerrado and Atlantic Forest hotspots. The composition present species of both domains, with high turnover component. We highlight the field environments and candeais are considered homogeneous and threathened, which would directly affect birds. The present study contributes to future conservation strategies, as it demonstrates ecotonal regions as transition zones and reinforces the need to consider as particular ecological units. These ecotonal regions are key locations for understanding ecological patterns in response to environmental changes or phytophysiognomies. Knowing how partitioning of the composition occurs within an environmental mosaic is essential to understand the limits and distributions of the species and conserve them.(AU)

Assuntos

RESUMO

Brazil has a high diversity of birds and presents the largest number of threatened bird species in the neotropical region. Even so, there are gaps in the bird knowledge, especially in ecotonal montane regions. Given this panorama, this study aimed to analyse the bird community distribution (richness, composition, and beta diversity between phytophysiognomies) of an ecotonal montane landscape of southeastern Brazil, with the purpose of detecting substitution patterns of bird species on a meso-scale. Using bird data performed during the years 1998 to 2015 in 46 sampling points, we found high bird richness in montane phytophysiognomies along an ecotone between Cerrado and Atlantic Forest hotspots. The composition present species of both domains, with high turnover component. We highlight the field environments and candeais are considered homogeneous and threathened, which would directly affect birds. The present study contributes to future conservation strategies, as it demonstrates ecotonal regions as transition zones and reinforces the need to consider as particular ecological units. These ecotonal regions are key locations for understanding ecological patterns in response to environmental changes or phytophysiognomies. Knowing how partitioning of the composition occurs within an environmental mosaic is essential to understand the limits and distributions of the species and conserve them.

Assuntos

RESUMO

Studies about the birds of rupestrian fields in the south of Minas Gerais State in Southeastern Brazil are incomplete, although this region is ornithologically well studied. This bird community has closely associated ecology with fields and the most endangered species of the Cerrado domain. The objective of this manuscript is to create a list of birds which occur in the rupestrian fields of seven municipalities in the south of Minas Gerais State, and further to analyze the birds distribution, the endangered species (and their conservation status), and generate bases for future conservation actions. We evaluated seven cities in the south of Minas Gerais State between 2012 and 2018 by using binoculars and cameras. We found a high richness in relation to other open areas, with the Tyrannidae and Trochilidae families being the most representative. We highlight the endangered species in the Cerrado domain which of these species are closely linked to rupestrian fields. The composition is similar to closer areas, with exception to São Thomé das Letras city because it suffers an influence of mining areas. We suggest creating a wildlife protected area to preserve and conserve a great area of rupestrian fields and consequently the associated biota, especially the bird communities(AU)

Assuntos

RESUMO

Studies about the birds of rupestrian fields in the south of Minas Gerais State in Southeastern Brazil are incomplete, although this region is ornithologically well studied. This bird community has closely associated ecology with fields and the most endangered species of the Cerrado domain. The objective of this manuscript is to create a list of birds which occur in the rupestrian fields of seven municipalities in the south of Minas Gerais State, and further to analyze the birds’ distribution, the endangered species (and their conservation status), and generate bases for future conservation actions. We evaluated seven cities in the south of Minas Gerais State between 2012 and 2018 by using binoculars and cameras. We found a high richness in relation to other open areas, with the Tyrannidae and Trochilidae families being the most representative. We highlight the endangered species in the Cerrado domain which of these species are closely linked to rupestrian fields. The composition is similar to closer areas, with exception to São Thomé das Letras city because it suffers an influence of mining areas. We suggest creating a wildlife protected area to preserve and conserve a great area of rupestrian fields and consequently the associated biota, especially the bird communities

Assuntos

RESUMO

A temperatura e umidade relativa (UR) são dois parâmetros abióticos que influenciam na ocorrência de diferentes espécies, corroborando com trabalhos de flutuações sazonais populacionais, e alterações na composição de comunidades. Porém, existem poucos estudos que correlacionam esses fatores com riqueza e abundância de pequenos mamíferos terrestres em fitofisionomias de elevada altitude. Portanto, este trabalho teve o objetivo de analisar a influência da UR e temperatura do ar sobre a riqueza e abundância dos pequenos mamíferos terrestres em três diferentes fitofisionomias: campo natural montano, florestas semideciduais e florestas nebulares, na Chapada das Perdizes, sudeste brasileiro. Foram utilizadas armadilhas de chapa (Sherman), arame (Tomahawk) e queda (pitfall) em conjunto com termo-higrômetros em fitofisionomias de elevada altitude na Chapada das Perdizes, sudeste brasileiro. A temperatura e umidade relativa não diferiram entre os ambientes florestais montanos e não influenciam a riqueza e abundância de pequenos mamíferos, resultado da proteção e estabilidade proporcionada pela floresta. Porém, existe influência desses parâmetros para os campos naturais montanos, onde houve redução da riqueza e abundância de espécies em função do aumento da temperatura do ar.

Temperature and relative humidity are two abiotic parameters that influence the occurrence of different species, corroborating with seasonal fluctuations in population, and changes in the composition of communities. However, there are few that correlate these factors with richness and abundance of small terrestrial mammals in phytophysiognomies at high altitudes (natural montane fields, semideciduous forests and cloud forests). Therefore, this research using Tomahawks, Shermmans and pitfall traps in conjunction with equipment to measure temperature and humidity in high altitude phytophysiognomies at Chapada das Perdizes, southeastern Brazil, demonstrates that temperature and relative humidity do not differ between montane forest environments and do not influence the richness and abundance of small mammals as a result of the protection and stability provided by the forest. However, there is influence of these parameters for the natural montane fields, in which there was reduction of species richness and abundance as a function of the increase in temperature.

Assuntos

RESUMO

A temperatura e umidade relativa (UR) são dois parâmetros abióticos que influenciam na ocorrência de diferentes espécies, corroborando com trabalhos de flutuações sazonais populacionais, e alterações na composição de comunidades. Porém, existem poucos estudos que correlacionam esses fatores com riqueza e abundância de pequenos mamíferos terrestres em fitofisionomias de elevada altitude. Portanto, este trabalho teve o objetivo de analisar a influência da UR e temperatura do ar sobre a riqueza e abundância dos pequenos mamíferos terrestres em três diferentes fitofisionomias: campo natural montano, florestas semideciduais e florestas nebulares, na Chapada das Perdizes, sudeste brasileiro. Foram utilizadas armadilhas de chapa (Sherman), arame (Tomahawk) e queda (pitfall) em conjunto com termo-higrômetros em fitofisionomias de elevada altitude na Chapada das Perdizes, sudeste brasileiro. A temperatura e umidade relativa não diferiram entre os ambientes florestais montanos e não influenciam a riqueza e abundância de pequenos mamíferos, resultado da proteção e estabilidade proporcionada pela floresta. Porém, existe influência desses parâmetros para os campos naturais montanos, onde houve redução da riqueza e abundância de espécies em função do aumento da temperatura do ar.(AU)

Temperature and relative humidity are two abiotic parameters that influence the occurrence of different species, corroborating with seasonal fluctuations in population, and changes in the composition of communities. However, there are few that correlate these factors with richness and abundance of small terrestrial mammals in phytophysiognomies at high altitudes (natural montane fields, semideciduous forests and cloud forests). Therefore, this research using Tomahawks, Shermmans and pitfall traps in conjunction with equipment to measure temperature and humidity in high altitude phytophysiognomies at Chapada das Perdizes, southeastern Brazil, demonstrates that temperature and relative humidity do not differ between montane forest environments and do not influence the richness and abundance of small mammals as a result of the protection and stability provided by the forest. However, there is influence of these parameters for the natural montane fields, in which there was reduction of species richness and abundance as a function of the increase in temperature.(AU)

Assuntos

RESUMO

The Cerrado biome is the second largest natural vegetation type existing in Brazil after the Amazon, covering 91% of the State of Tocantins, with 30% of the territory changed as a result of the expansion of economic development areas. The substitution of natural vegetation means habitat loss on species, and may put the survival of medium and large-sized mammal species under extinction risk. These species represent significant energy demands and high requirements of area within the habitat. This study aims to assess the species composition and the frequency of use of physiognomic types of vegetation by medium and large-sized mammals. The study was conducted from 2001 to 2011 using a set of complementary and alternative techniques in fragments of seven different physiognomic types of vegetation. Fourth-seven medium and large-sized mammals were registered. This record corresponds to 92% of species already described within the biome, and five additional species to thoseregistered in the data base of the State of Tocantins. Fourteen of these species are at certain degree of threat of extinction. The most used physiognomic types of vegetation in terms of canopy cover were Cerradao, Typical Cerrado, Riparian Forest and Dense Cerrado, and the less used were Gallery Forest, Campo Sujo and Vereda.

Assuntos

RESUMO

The bird diversity is threatened and many studies have focused on preservation and conservation efforts. For example, few public Wildlife Protected Areas are created, which increase the requirement for private initiatives to support the conservation challenge. The Quedas do Rio Bonito Ecological Park is a private protected areas located in the south of Minas Gerais, Brazil. Here, we present the median richness (54 bird species, 20 families and seven orders) of this protected area in relation to other studies in southeastern Brazil, as well as seasonal variations, similarities between areas and the estimation of understory stratum richness. Therefore, this article presents arguments to support future studies, since knowledge about the community in different areas is primordial to Biological Conservation projects.

A diversidade de aves está ameaçada e muitos estudos têm se concentrado em esforços de preservação e conservação. No entanto, poucas áreas protegidas públicas de vida selvagem são criadas, o que aumenta a necessidade de iniciativas privadas para apoiar o desafio da conservação. O Parque Ecológico Quedas do Rio Bonito é uma dessas áreas privadas protegidas localizada no sul de Minas Gerais, Brasil. Aqui, apresentamos a riqueza mediana (54 espécies, 20 famílias alocadas em sete ordens) desta área protegida em relação a outros estudos no sudeste do Brasil, bem como foram observadas variações sazonais, semelhanças entre áreas e a estimativa de riqueza do estrato do subbosque. Portanto, este artigo apresenta argumentos para auxiliar futuros estudos, uma vez que o conhecimento sobre a comunidade em diferentes áreas é primordial para projetos de Conservação Biológica.

Assuntos

RESUMO

The scientific literature mentions that neotropical birds of the family Psittacidae have some tendencies to natural and artificial changes (human food or manipulation) in their plumage colours. In studies of plumage aberrant of the parrots were categorized six types: albinism, erythrism, leucism, xantocroism, cyanism and melanism. We present a register of erythrism in species of Brazilian native parrot Psittacara leucophthalmus (Statius Muller, 1776). On the world, there is only one report of this type of aberrant plumage for Amazona aestiva (Linnaeus, 1758) and another to an African species Agapornis roseicollis, thus highlighting the importance of this record.

Na literatura é mencionado que as aves neotropicais da família Psittacidae possuem algumas tendências a alterações naturais e artificiais (manipulação humana alimentar ou genética) na coloração de suas plumagens. Em estudos de aberração de plumagem em Psitacídeos foram categorizados seis tipos: albinismo, eritrismo, leucismo, xantocroismo, cianismo e melanismo. Apresentamos aqui um registro de eritrismo em espécie de Psitacídeo nativa brasileira Psittacara leucophthalmus (Statius Muller, 1776). Há apenas um relato deste tipo de plumagem aberrante para Amazona aestiva (Linnaeus, 1758), e um para a espécie africana Agapornis roseicollis, destacando assim a importância deste registro.

Assuntos

RESUMO

The bird diversity is threatened and many studies have focused on preservation and conservation efforts. For example, few public Wildlife Protected Areas are created, which increase the requirement for private initiatives to support the conservation challenge. The Quedas do Rio Bonito Ecological Park is a private protected areas located in the south of Minas Gerais, Brazil. Here, we present the median richness (54 bird species, 20 families and seven orders) of this protected area in relation to other studies in southeastern Brazil, as well as seasonal variations, similarities between areas and the estimation of understory stratum richness. Therefore, this article presents arguments to support future studies, since knowledge about the community in different areas is primordial to Biological Conservation projects.(AU)

A diversidade de aves está ameaçada e muitos estudos têm se concentrado em esforços de preservação e conservação. No entanto, poucas áreas protegidas públicas de vida selvagem são criadas, o que aumenta a necessidade de iniciativas privadas para apoiar o desafio da conservação. O Parque Ecológico Quedas do Rio Bonito é uma dessas áreas privadas protegidas localizada no sul de Minas Gerais, Brasil. Aqui, apresentamos a riqueza mediana (54 espécies, 20 famílias alocadas em sete ordens) desta área protegida em relação a outros estudos no sudeste do Brasil, bem como foram observadas variações sazonais, semelhanças entre áreas e a estimativa de riqueza do estrato do subbosque. Portanto, este artigo apresenta argumentos para auxiliar futuros estudos, uma vez que o conhecimento sobre a comunidade em diferentes áreas é primordial para projetos de Conservação Biológica.(AU)

Assuntos