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104 results for “Cave habitat”
Fig. 6 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil
Fig. 6. Population densities of Eigenmannia trilineata from rio da Lapa, São Domingos karst area, central Brazil, observed from dusk until night phase during two nights (April and August 2001). Asterisk indicates that no sample was recorded in this period at April 2001.
Fig. 4 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil
Fig. 4. Box-plots showing the means and standard deviations (Sd) of population densities data for Eigenmannia vicentespelaea along the years 1999, 2000 and 2001 (a) and between the dry seasons, independent of the years (b) BDS, beginning of dry season; MDS, middle of dry season; EDS, end of dry season.
Fig. 7 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil
Fig. 7. Box-plots showing means and standard deviations of pH (a) conductivity (b) and temperature (c) from the São Vicente II cave stream in the dry seasons of 1999, 2000 and 2001 (circle and asterisk represent outliers).
Fig. 3 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil
Fig. 3. Monthly rainfall recorded in the years of 1999, 2000 and 2001. Source: INMET, Posse municipality, Goiás State, central Brazil.
Fig. 5 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil
Fig. 5. Biplot resulting from Principal Component Analysis with seven variables. Dark circles represent sampling units.
Fig. 12 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 12. Threats to the isolated hill forests and Cnemaspis species in study areas in Sri Lanka. (A) Illegal forest clearing, (B) fire- wood collection for tea factory, (C) granite mining activities, (D) agricultural fields in slopy areas, (E) tea plantation and highly crowded anthropogenic habitat, and (F) a landslide in mountain areas. Photos: Suranjan Karunarathna and Madhava Botejue.
Fig. 11 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 11. General habitats of Cnemaspis kawminiae sp. nov. at Mandaramnuwara, Nuwara-Eliya District, Sri Lanka. (A) Complete view of the granite hill at roadside, (B) small granite cave close to the stream, and (C) granite rock wall along the road. Photos: Madhava Botejue.
Fig. 10 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 10. Holotype male of Cnemaspis kawminiae sp. nov. (NMSL 2018.18.01) in life in-situ. (A) Dorsal view of the full body, and (B) dorsolateral view with labial coloration. Photos: Madhava Botejue.
Fig. 8 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 8. General habitat of Cnemaspis dissanayakai sp. nov. at Dimbulagala isolated hill forest, Polonnaruwa District, Sri Lanka. (A) Complete view of the mountain, (B) abandoned ancient cave building in Kosgahaulpatha, and (C) deep and tall granite tunnel. Photos: Madhava Botejue and Ashan Geeganage.
Fig. 5 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 5. General habitat of Cnemaspis kotagamai sp. nov. at Bambaragala isolated forest hill, Ratnapura District, Sri Lanka. (A) Rock outcrop habitat, (B) abandoned cave building, and (C) deep and tall granite tunnel. Photos: Madhava Botejue.
Fig. 7 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 7. Holotype male of Cnemaspis dissanayakai sp. nov. (NMSL 2018.20.01) in life in-situ in Dimbulagala. (A) Dorsal view of the full body, and (B) ventral view with dirty white coloration. Photos: Suranjan Karunarathna.
Fig. 9 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 9. Holotype male of Cnemaspis kawminiae sp. nov. (NMSL 2018.18.01). (A) Dorsal head, (B) lateral head, (C) ventral head, (D) homogeneous dorsal scales, (E) scales on lateral surface of trunk, (F) smooth ventral scales, (G) cloacal characters with precloacal pores and femoral pores, (H) lamellae on manus, (I) lamellae on pes, (J) smooth dorsal scalation of tail, (K) lateral side of tail, and (L) very small subcaudals. Photos: Suranjan Karunarathna.
Fig. 4 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 4. Holotype male of Cnemaspis kotagamai sp. nov. (NMSL 2018.07.01) in life in-situ in Bambaragala. (A) Dorsal view of the full body, and (B) ventral view with scattered yellow coloration. Photos: Suranjan Karunarathna.
Fig. 6 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 6. Holotype male of Cnemaspis dissanayakai sp. nov. (NMSL 2018.20.01). (A) Dorsal head, (B) lateral head, (C) ventral head, (D) homogeneous dorsal scales, (E) scales on lateral surface of trunk, (F) smooth ventral scales, (G) cloacal characters with precloacal pores and femoral pores, (H) lamellae on manus, (I) lamellae on pes, (J) smooth dorsal scalation of tail, (K) lateral side of tail, and (L) very small smooth subcaudals. Photos: Suranjan Karunarathna.
Fig. 2 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 2. (A-F) PCA Ordination plots for multivariate morphometric analyses (all pairwise ordination plots for PC1 through PC4 are shown), (G) Scatter plot of PCA between Cnemaspis kotagamai sp. nov. (filled circles), Cnemaspis ingerorum (triangles), and Cnemaspis kallima (filled diamonds), (H) Scatter plot of PCA between Cnemaspis dissanayakai sp. nov. (circles), Cnemaspis latha (filled squares), and Cnemaspis kumarasinghei (stars), (I) Scatter plot of PCA between Cnemaspis kawminiae sp. nov. (squares), Cnemaspis gotaimbarai (filled triangles), and Cnemaspis kumarasinghei (stars).
Fig. 1 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 1. Currently known distribution of Cnemaspis dissanayakai sp. nov. (square) from Dimbulagala; Cnemaspis kawminiae sp. nov. (circle) from Mandaramnuwara; and Cnemaspis kotagamai sp. nov. (triangle) from Bambaragala, Sri Lanka.
Fig. 3 in Three new species of day geckos (Reptilia: Gekkonidae: Cnemaspis Strauch, 1887) from isolated granite cave habitats in Sri Lanka
Fig. 3. Holotype male of Cnemaspis kotagamai sp. nov. (NMSL 2018.15.01). (A) Dorsal head, (B) lateral head, (C) ventral head, (D) heterogeneous dorsal scales, (E) scales on lateral surface of trunk, (F) smooth ventral scales, (G) cloacal characters with precloacal pores and femoral pores, (H) lamellae on manus, (I) lamellae on pes, (J) keeled dorsal scalation of tail, (K) lateral side of tail, and (L) very small smooth subcaudals. Photos: Suranjan Karunarathna.
Linked collectors and determiners for: Caves as a key habitat for rare and endemic species of the west coast of North America: a taxonomic revision of the spider genus Oaphantes (Araneae Linyphiidae).
Natural history specimen data linked to collectors and determiners held within, "Caves as a key habitat for rare and endemic species of the west coast of North America: a taxonomic revision of the spider genus Oaphantes (Araneae Linyphiidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/5921c016-e858-44dc-b266-a784c514d6dc">https://bionomia.net/dataset/5921c016-e858-44dc-b266-a784c514d6dc</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/5921c016-e858-44dc-b266-a784c514d6dc">https://gbif.org/dataset/5921c016-e858-44dc-b266-a784c514d6dc</a>. Formatted as a Frictionless Data package.
Data from: Historical demography of four gecko species specializing in boulder cave habitat – its implications in the evolutionary dead end hypothesis and conservation
Specialization in narrow ecological niches might not only help species to survive in competitive or unique environments but also contribute to their extermination over evolutionary time. Although the "evolutionary dead end" hypothesis has long been debated, empirical evidence from species with detailed information on niche specialization and evolutionary history is still rare. Here we used a group of four closely related Cnemaspis gecko species that highly depend on granite boulder caves in the Mekong Delta to illuminate the potential impact of ecological specialization on their evolution and population dynamics. Isolated by the unsuitable habitat of a flood plain, these boulder-dwelling geckos are among the most narrowly distributed Squamata species in the world. We applied several coalescence-based approaches combined with the RAD-seq technique to estimate their divergence times, gene flow and demographic fluctuations during the speciation and population differentiation processes. Our results showed long-term population shrinkage in the four geckos and limited gene flow during their divergence. The results suggest that the erosion and fragmentation of the granite boulder hills have had great impacts on these populations' divergences and population declines. We argue that the specialist gecko's habitat specialization has facilitated the fine-scaled speciation in these granite rocky hills; in contrast, specialization might also have pushed these species toward the edge of extinction. Our study also emphasizes the conservation urgency of these vulnerable, cave-dependent geckos.
Data from: Historical demography of four gecko species specializing in boulder cave habitat – its implications in the evolutionary dead end hypothesis and conservation
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Allen Brain Atlas
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