ABSTRACT
ABSTRACT Describing dung beetle communities in tropical forest remnants located in disturbed/urbanized and conserved areas can provide information about the functioning of these ecosystems and support conservation plans. This study aimed to verify the effect of seasons and bait type on dung beetle communities in remnants of the Atlantic Forest in order to describe their composition and diversity parameters. The study was carried out during both the rainy and dry seasons in periurban and urban remnants. Eighteen pitfall traps baited with feces, carrion, and injured millipedes were established in each site. A total of 3501 individuals and 23 species were recorded. Urban remnant presented higher abundance of individuals in the dry season. On the other hand, in periurban remnant the higher abundance was verified in the rainy season. The diversity was higher in the rainy season in both sites. In urban remnant, Coprophanaeus ensifer was found to be generalist regarding its choice of bait (feces and carrion). The use of injured millipedes as bait allowed the record of the predatory species Deltochilum alpercata. Among the types of bait used, the injured millipedes proved to be very effective, capturing a greater diversity of dung beetles during the rainy season in both remnants, and allowed the collection of specialized, necrophages, and generalists species. Therefore, we propose the use of mixed-bait sampling designs in inventories and surveys to increase the chances of sampling species with different traits or dietary preferences, which are often rare in collections.
ABSTRACT
First record of Coprophanaeus bellicosus (Olivier) (Coleoptera, Scarabaeidae) in a "Brejo de Altitude" forest in northeastern Brazil: a historical biogeographical approach. This note presents the first record for a species of dung beetle of the genus Coprophanaeus, subgenus Megaphanaeus, in a "Brejo de Altitude" forest. Besides the new record, the paper discusses biogeographic aspects of the species and subgenus, as well as of the natural history of the "Brejos de Altitude", unique ecosystems in the northeast region of Brazil.
Primeiro registro de Coprophanaeus bellicosus (Olivier) (Coleoptera, Scarabaeidae) em um Ecossistema de Brejo de Altitude na Região Nordeste do Brasil: uma abordagem biogeográfica histórica. Esta nota apresenta o primeiro registro para uma espécie de rola-bosta do gênero Coprophanaeus, subgênero Megaphanaeus, em um ecossistema de Brejo de Altitude. Além do novo registro, o trabalho enfoca e discute aspectos biogeográficos da espécie e subgênero, assim como da história natural dos Brejos de Altitude, ecossistemas exclusivos da região nordeste do Brasil.
ABSTRACT
O objetivo deste trabalho foi estudar riqueza, abundância, diversidade e equitabilidade das espécies de Scarabaeinae em dois ambientes no Refúgio Ecológico Charles Darwin (RECD), Pernambuco. As coletas foram realizadas com armadilha de interceptação de vôo entre os meses de Abril e Junho de 2007, totalizando seis coletas. Foram capturados 4576 escarabeíneos, pertencentes a 35 espécies, 15 gêneros e seis tribos. Sete novos registros de espécies foram feitos para Pernambuco, passando de 26 para 33 espécies. As tribos registradas foram Canthonini, Ateuchini, Coprini, Phanaeini, Eurystenini e Onthophagini. Os gêneros melhor representados foram: Dichotomius com 84,6 por cento dos besouros coletados, seguido por Canthidium com 7,62 por cento e Canthon com 2,48 por cento. A espécie Dichotomius aff.sericeus foi a mais abundante com 3889 indivíduos. Em todo o estudo foram verificadas 17 espécies para a área aberta, sendo 11 restritas a esse ambiente, enquanto para mata foram registradas 24, sendo 18 espécies restritas. Grande parte dos indivíduos capturados na mata foi da espécie D. aff.sericeus, enquanto no ambiente aberto nenhum indivíduo desta espécie foi coletado. Os estimadores indicaram uma estimativa máxima de riqueza de 21 espécies para o ambiente aberto e 32 espécies para o ambiente de mata. A curva de acumulação de espécies baseada em valores de riqueza observada média para os dois ambientes do RECD, não apresentou tendência a assíntota.
The objective of this work was to study richness, abundance, diversity and equitability of the species of Scarabaeinae, in two environments in the Charles Darwin Ecology Refuge (CDER), Pernambuco. Sampling was carried with flight intercept trap from April through June 2007, totaling six samples. 4576 scarabaeinaes, belonging to 35 species, 15 genera and six tribes were captured. Seven new species records were found for Pernambuco, whose known fauna increased from 26 to 33 species. The tribes recorded were Canthonini, Ateuchini, Coprini, Phanaeinae, Eurystenini and Onthophagini. The better represented genera were: Dichotomius with 84,6 percent of the beetles collected, followed by Canthidium with 7,62 percent and Canthon with 2,48 percent. Dichotomius aff.sericeus was the most abundant species with 3889 individuals. 17 species were sampled in open areas, with 11 of them restricted to this habitat, while 24 were recorded within the forest, 18 of them found only in this habitat. Most individuals captured in the forest belong to D. aff.sericeus, while in open areas no specimen of this species was collected. The estimators indicate a maximum richness of 21 species for the open environment and 32 species for the forest. The species accumulation curve, based on average richness values for the two environments at CDER, did not show tendency to assintote.
Subject(s)
Animals , Coleoptera , Biodiversity , Tropical Climate , Brazil , Ecology , TreesABSTRACT
Este estudo objetivou levantar preliminarmente os escarabeíneos copro-necrófagos da região de Brejo Novo, Caruaru, Pernambuco, e verificar aspectos da estrutura da comunidade como sazonalidade, diversidade, equitabilidade, riqueza e abundância das espécies. Foram realizadas 10 coletas, com intervalos de 30 dias e duração de 48 horas, de setembro de 2003 a julho de 2004. Utilizaramse 24 armadilhas de queda, com dois tipos de isca, fezes humanas e carne bovina em estado de putrefação. Foram coletados 1.540 indivíduos pertencentes a seis tribos, 12 gêneros e 28 espécies. As espécies Canthon af. carbonarius, Canthon chalybaeus, Dichotomius nisus, D. semisquamosus, Digitonthophagus gazella e Eurysternus hirtellus aparentemente são as mais adaptadas ao ambiente estudado. Foram coletados 826 indivíduos em armadilhas iscadas com fezes humanas e 714 em carne bovina apodrecida. Ocorreu um número maior de espécies consideradas "raras" (15), sendo três destas "singletons", duas "doubletons" e 10 com abundância entre três e 10 indivíduos, 13 espécies foram consideradas "comuns". Das espécies analisadas, sete apresentaram hábitos alimentares generalistas, quatro são estritamente coprófagas e uma estritamente necrófaga. Foram verificadas correlações positivas entre a precipitação mensal e a abundância e a riqueza de espécies. O levantamento preliminar das espécies de Scarabaeinae da região de Brejo Novo contribuiu para aumentar o número de espécies registradas para o estado de Pernambuco e região Nordeste do Brasil.
This paper reports the results of the preliminary survey of copro-necrophagous dung beetles of Brejo Novo region, Caruaru, Pernambuco, as well as some aspects of the community structure such as seasonality, diversity, equitability, richness and abundance of species. Ten samplings with intervals of 30 days and duration of 48 hours, fortnightly were done between September 2003 to July 2004. Scarab beetles were collected with 24 pitfall traps baited with two types of baits, human excrements and rotting bovine meat. A total of 1,540 individuals belonging to six tribes, 12 genera and 28 species were collected. The species Canthon af. carbonarius, Canthon chalybaeus, Dichotomius nisus, D. semisquamosus, Digitonthophagus gazella and Eurysternus hirtellus are, apparently, adapted to the studied environment. Traps baited with human excrements attracted 826 individuals and those with rotting bovine meat attracted 714 specimens. Large number of species (15) considered "rare" occurred, being three of them "singletons", two "doubletons" and 10 with abundance between three and 10 individuals; 13 species were considered "common". Of the analyzed species, seven present generalist alimentary habits, four are strictly coprophagous and one is strictly necrophagous. Positive correlations were verified between the precipitation and the abundance of the individuals and the species richness. This preliminary survey of the dung beetles of the Brejo Novo region contributed to increase the number of species registered for Pernambuco and northeast region of Brazil.