CECAV
URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1
Centro Nacional de Pesquisa e Conservação de Cavernas
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5 resultados
Resultados da Pesquisa
Item Richness of Cladosporium in a tropical bat cave with the description of two new species(2022-03-04) Pereira, Mayara L. S.; Carvalho, João L. V. R.; Lima, Joenny M. S.; Barbier, Eder; Bernard, Enrico; Bezerra, Jadson D. P.; Souza-Motta, Cristina M.Caves are important roosts for hundreds of bat species worldwide. Such habitats frequently harbour rich and extremely specialised biotas; however, they remain among the least-studied places on Earth, particularly in the tropical region. The fungal richness in tropical caves in Brazil has recently been studied, and these surveys have reported a largely unexplored mycobiome, highlighting some bat caves as hotspots for fungal findings. During a speleomycological survey in a bat cave in the Caatinga dry forest in Brazil, 15 Cladosporium isolates were obtained from the air and ectoparasitic bat flies (Diptera: Streblidae) collected from the bat Pteronotus gymnonotus (Chiroptera: Mormoopidae). Based on morphological features and multi-gene (ITS rDNA, ACT, and TEF1) phylogenetic analyses, we reported eight Cladosporium species in this cave. Two new species, Cladosporium cavernicola and Cladosporium pernambucoense, were isolated from the cave air and have been formally described here. They, along with Cladosporium puris, Cladosporium subuliforme, and Cladosporium tenuissimum, were related to the Cladosporium cladosporioides species complex. Additionally, we recorded Cladosporium austrohemisphaericum, Cladosporium parahalotolerans, and Cladosporium sphaerospermum (C. sphaerospermum species complex). Our findings emphasise the large potential for new fungal species associated with caves and bats worldwide.Item Living in the dark: Bat caves as hotspots of fungal diversity(2020-12-04) O. B. Cunha, Aline; D. P. Bezerra, Jadson; G. L. Oliveira, Thays; Barbier, Eder; Bernard, Enrico; R. Machado, Alexandre; M. Souza-Motta, Cristina; Sabrina SarroccoBat caves are very special roosts that harbour thousands of bats of one or more species. Such sites may hold an incredible “dark fungal diversity” which is still underestimated. We explored the culturable fungal richness in the air, on bats, and in the guano in a bat cave in Brazil’s Caatinga dry forest. Fungal abundance was 683 colony-forming units (CFU) in the guano, 673 CFU in the air, and 105 CFU on the bats. Based on morphological and phylogenetic analysis of ITS, LSU, and TUB2 sequences, fungal isolates of 59 taxa belonging to 37 genera in the phyla Ascomycota (28 genera, including Aspergillus, Penicillium, Cladosporium, and Talaromyces), Basidiomycota (eight genera, including Rhodotorula and Schizophyllum), and Mucoromycota (only Rhizopus) were identified. The fungal richness in the air was 23 taxa (especially Aspergillus taxa), mainly found at 15 m and 45 m from the cave entrance; on the bodies of bats it was 36 taxa (mainly Aspergillus taxa), especially on their wing membranes (21 taxa, nine of which were exclusively found in this microhabitat); and in guano 10 fungal taxa (especially Aspergillus and Penicillium) were found. The fungal richness associated with guano (fresh and non-fresh) was similar from bats with different eating habits (insectivorous, frugivorous, and haematophagous). Sampling effort was not sufficient to reveal the total fungal taxa richness estimated. Eight (21.6%) of the 37 genera and 17 (53.1%) of the 32 identified fungal species are reported for the first time in caves. Our results highlight bat caves in Brazil as hotspots of fungal diversity, emphasizing the need to protect such special roosts.- Ecology of Antricola ticks in a bat cave in north-eastern Brazil(2020-09-12) Barbier, Eder; Bernard, Enrico; Dantas‑Torres, FilipeArgasid ticks are a diverse group of acarines that parasitize numerous vertebrate hosts. Along with birds, bats serve as hosts for several argasid ticks, which are commonly found in bat caves. Argasid ticks have regained attention from tick taxonomists in recent dec-ades, with a number of new species described in various zoogeographical regions. None-theless, studies on their ecology are still scarce. We conducted a 1-year longitudinal study to assess the presence of argasid ticks in a bat cave in the drylands of north-eastern Brazil and evaluate their possible response to abiotic factors. From July 2014 to June 2015, 490 ticks were collected (272 nymphs, 169 males and 49 females) in a cave chamber hosting a large colony of Pteronotus spp. bats, being relatively more frequent from July to December 2014. Adults were identified as Antricola guglielmonei, whereas nymphs were assigned to the genus Antricola. Almost all ticks (98%) were collected on the cave walls. Only 2% were on the ceiling and, surprisingly, no specimens were found on the floor and/or guano. Adults were usually clustered in the crevices and little mobile, whereas nymphs were dispersed and more active, moving over the walls or ceiling of the cave. Although present in most of the studied period, there was a significantly negative correlation between tick abundance and relatively humidity, and A. guglielmonei was more frequent during the dry season. Moreover, there was no evident correlation between the abundance of ticks and bats. Fur-ther long-term studies will be able to verify whether this pattern is repeated over time, and even whether other variables can influence the population dynamics of A. guglielmonei.
- Living in the dark: Bat caves as hotspots of fungal diversity(2020-12-04) O. B. Cunha, Aline; D. P. Bezerra, Jadson; G. L. Oliveira, Thays; Barbier, Eder; Bernard, Enrico; R. Machado, Alexandre; M. Souza-Motta, Cristina; Sabrina SarroccoBat caves are very special roosts that harbour thousands of bats of one or more species. Such sites may hold an incredible “dark fungal diversity” which is still underestimated. We explored the culturable fungal richness in the air, on bats, and in the guano in a bat cave in Brazil’s Caatinga dry forest. Fungal abundance was 683 colony-forming units (CFU) in the guano, 673 CFU in the air, and 105 CFU on the bats. Based on morphological and phylogenetic analysis of ITS, LSU, and TUB2 sequences, fungal isolates of 59 taxa belonging to 37 genera in the phyla Ascomycota (28 genera, including Aspergillus, Penicillium, Cladosporium, and Talaromyces), Basidiomycota (eight genera, including Rhodotorula and Schizophyllum), and Mucoromycota (only Rhizopus) were identified. The fungal richness in the air was 23 taxa (especially Aspergillus taxa), mainly found at 15 m and 45 m from the cave entrance; on the bodies of bats it was 36 taxa (mainly Aspergillus taxa), especially on their wing membranes (21 taxa, nine of which were exclusively found in this microhabitat); and in guano 10 fungal taxa (especially Aspergillus and Penicillium) were found. The fungal richness associated with guano (fresh and non-fresh) was similar from bats with different eating habits (insectivorous, frugivorous, and haematophagous). Sampling effort was not sufficient to reveal the total fungal taxa richness estimated. Eight (21.6%) of the 37 genera and 17 (53.1%) of the 32 identified fungal species are reported for the first time in caves. Our results highlight bat caves in Brazil as hotspots of fungal diversity, emphasizing the need to protect such special roosts.
Item The bats of Rio Grande do Norte state, northeastern Brazil(Biota Neotropica, 2018-04-16) Vargas-Mena, Juan Carlos; Pereira, Kleytone Alves; Barros, Marília Abero Sá; Barbier, Eder; Schmidt, Eugenia Cordero; Lima, Sergio Maia Queiroz; Herrera, Bernal Rodríguez; Venticinque, Eduardo Martins