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 The ticking clock in the dark: review of biological rhythms in cave invertebrates(2024-05-09) de Souza, Priscila Emanuela; Souza-Silva, Marconi; Ferreira, Rodrigo LopesCircadian clocks, internal mechanisms that generate 24-hour rhythms, play a crucial role in coordinating biological events with day-night cycles. In light-deprived environments such as caves, species, particularly isolated obligatory troglobites, may exhibit evolutionary adaptations in biological rhythms due to light exposure. To explore rhythm expression in these settings, we conducted a comprehensive literature review on invertebrate chronobiology in global subterranean ecosystems, analyzing 44 selected studies out of over 480 identified as of September 2023. These studies revealed significant taxonomic diversity, primarily among terrestrial species like Coleoptera, with research concentrated in the United States, Italy, France, Australia, and Brazil, and a notable gap in African records. Troglobite species displayed a higher incidence of aperiodic behavior, while troglophiles showed a robust association with rhythm expression. Locomotor activity was the most studied aspect (>60%). However, approximately 4% of studies lacked information on periodicity or rhythm asynchrony, and limited research under constant light conditions hindered definitive conclusions. This review underscores the need to expand chronobiological research globally, encompassing diverse geographical regions and taxa, to deepen our understanding of biological rhythms in subterranean species. Such insights are crucial for preserving the resilience of subsurface ecosystems facing threats like climate change and habitat loss.Item ESPELEOTURISMO NO BRASIL: CONSIDERAÇÕES SOBRE SEGURANÇA, CAPACIDADE DE CARGA, IMPACTO E EDUCAÇÃO AMBIENTAL(2023) Santos, Edemir Barbosa dos; Santana, Cristiana Cerqueira SilvaNo Brasil, muitas cavernas são utilizadas para fins turísticos, contudo, poucas dispõem de planejamento turístico, deixando-as vulneráveis aos impactos ambientais. Este trabalho tem como objetivo discutir o potencial turístico das cavernas, o estado de conservação, a capacidade de carga turística, os perigos a saúde do visitanteeà necessidade da Educação Ambientalpara a sustentabilidade ambiental e econômica. O Brasil possui grande potencial espeleoturístico, contudo para a compatibilização do uso turístico com conservação ambiental, se faz necessário a implementação obrigatóriade um plano de manejo, mas sobretudo, de programas de monitoramento ambiental, de Educação Ambientale Patrimonial, e da fiscalização por parte dos órgãos responsáveis para garantir o cumprimento das normas.Item A new genus and two new species of the millipede family Chelodesmidae from Bahia state, northeastern Brazil, including a likely troglobiont (Diplopoda, Polydesmida)(2022-06-20) GOLOVATCH, SERGEI I.; BOUZAN, RODRIGO S.; GALLO, JÉSSICA S.; BICHUETTE, MARIA E.A new genus and two new species of Chelodesmidae are described from two caves of the João Rodrigues river system in Bahia state, northeastern Brazil: Strongylosomides troglobius sp. nov. and Rotundotergum elevatum gen. nov., sp. nov. The former species differs from congeners primarily by the gonopods showing the prefemoral process strongly fused caudally along its basal half to the acropodite and, in showing such troglomorphic traits as a nearly unpigmented and fragile body with thin tegument, it seems the first troglobiont to be documented in the genus. Moreover, this new species seems to be so remarkably similar to Leptodesmus stercoriarius Schubart, 1956, from Minas Gerais state, that the following new combination is warranted: Strongylosomides stercoriarius (Schubart, 1956), comb. nov. ex Leptodesmus de Saussure, 1859. The new genus, Rotundotergum gen. nov., seems to be especially similar to Eucampesmella Schubart, 1955, but differs clearly by the absence of a secondary process on the gonopodal prefemoral process, coupled with the latter being unusually long and strongly separated from the acropodite. The type species R. elevatum sp. nov., being partly clearly pigmented, seems to be only troglophilic. The region generally supports a typical dry tropical climate, whereas the caves represent sites with high humidity, this being essential for the survival of these and other species. However, these habitats remain unprotected by Brazilian law, while the João Rodrigues River system is threatened by irrigation projects, potential limestone exploitation, asphalt and road widening or construction that pass across the system and can collapse the rock, and pollution of the subterranean drainage. We hope that the new species described here could help us protect their type localities and the João Rodrigues River system as a whole.Item Registro de predação de gastrópode (Pulmonata, Charopidae) pelo Amblipígeo Charinus (Amblypygi, Charinidae) em caverna do Nordeste brasileiro(2019) Araújo, Jan Pierre Martins de; Basílio, Gustavo Henrique Nunes; Kramer, Marcelo Augusto de Freitas; Almeida Netto, Solon Rodrigues deO presente trabalho aborda um registro de predação de um gastrópode Pulmonado da família charopidae por amblipígeo do gênero Charinus em caverna do município de Martins, Rio Grande do Norte, nordeste do Brasil. Esta observação contribui com informações adicionais sobre a preferência alimentar do gênero Charinus, principalmente em ambiente subterrâneo.Item A new troglophilic species of Erebonyx (Orthoptera: Grylloidea: Phalangopsidae) from Brazilian caves(2022-12-16) Merlo, Rayanne Lays Sant'ana ; Castro-Souza, Rodrigo Antônio ; Bento, Diego de Medeiros ; Ferreira, Rodrigo LopesThe genus Erebonyx was proposed to accommodate a single troglobitic species from northeastern Brazil. A second cricket belonging to this genus is herein described, but although it was also found in caves, it does not bear any troglomorphic traits, suggesting it is a troglophilic species. The new species differs from the other species on the genus in the phallic sclerites, presence of developed eyes (with ommatidia), pigmented integument, and the presence of stridulatory file on the tegmina. In addition, we present the description of the external morphology, together with the staining and description of tegmina. Finally, we present a brief discussion regarding its habitat, distribution and possible conservation actions for the species.