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214 results for “mountain lake”
Data from: Rapid evolution of thermal plasticity in mountain lake Daphnia populations
Populations at risk of extinction due to climate change may be rescued by adaptive evolution or plasticity. Selective agents, such as introduced predators, may enhance or constrain plastic or adaptive responses to temperature. We tested responses of Daphnia to temperature by collecting populations from lakes across an elevational gradient in the presence and absence of fish predators (long-term selection). We subsequently grew these populations at two elevations in field mesocosms over two years (short-term selection), followed by a common-garden experiment at two temperatures in the lab to measure life-history traits. Both long-term and short-term selection affected traits, suggesting that genetic variation of plasticity within populations enabled individuals to rapidly evolve plasticity in response to high temperature. We found that short-term selection by high temperature increased plasticity for growth rate in all populations. Fecundity was higher in populations from fishless lakes and body size showed greater plasticity in populations from warm lakes (long-term selection). Neither body size nor fecundity were affected by short-term thermal selection. These results demonstrate that plasticity is an important component of the life-history response of Daphnia, and that genetic variation within populations enabled rapid evolution of plasticity in response to selection by temperature.
FIGURE 4 in A new species of Bosmina (Liederobosmina) Brték, 1997 (Cladocera: Bosminidae) from high mountain lakes of Colombia
FIGURE 4. Bosmina (Liederobosmina) korineki sp.nov., parthenogenetic female from Laguna Chisacá, Bogotá Province, Colombia. A, limb I. B, distal portion of limb I. C, limb II. D, seta 8 on inner limb portion. E–F, distal armature of gnathobase II. G, limb III. H, inner portion of limb III. I, distal armature of its gnathobase. J, limb IV. K, inner portion of limb IV. L, limb V. M, limb VI represented by epipodite only. Scale bars 0.1 mm.
FIGURE 3 in A new species of Bosmina (Liederobosmina) Brték, 1997 (Cladocera: Bosminidae) from high mountain lakes of Colombia
FIGURE 3. Bosmina (Liederobosmina) korineki sp.nov., parthenogenetic female from Laguna Chisacá, Bogotá Province, Colombia. A–B, lateral view. C, head, lateral view. D, head, anterior view. E, fornix and lateral head pore. F, postero-ventral valve portion. G, postabdomen. Scale bars 0.1 mm.
FIGURE 2 in A new species of Bosmina (Liederobosmina) Brték, 1997 (Cladocera: Bosminidae) from high mountain lakes of Colombia
FIGURE 2. Bosmina (Liederobosmina) korineki sp.nov., large parthenogenetic female from Laguna Chisacá, Bogotá Province, Colombia, SEM photos. A–B, lateral view. C, antero-lateral view. D, dorso-lateral view. E, head. F, lateral head pore. G, region of fornix. H, antenna II. I, valve sculpture. Scale bars 0.1 mm for A–D; 0.1 mm for E, G–I; 0.01 mm for F.
FIGURE 1 in A new species of Bosmina (Liederobosmina) Brték, 1997 (Cladocera: Bosminidae) from high mountain lakes of Colombia
FIGURE 1. Bosmina (Liederobosmina) korineki sp.nov., A, large parthenogenetic female. B, juvenile female from Laguna Chisacá, Bogotá Province, Colombia. Photos by the confocal microscope. Scale bars 0.1 mm.
Data from: Abundance and morphometry changes across the high-mountain lake-size gradient in the tropical Andes of Southern Ecuador
The number, size, and shape of lakes are key determinants of the ecological functionality of a lake district. The lake area scaling relationships with lake number and volume enable upscaling biogeochemical processes and spatially considering organisms' metapopulation dynamics. These relationships vary regionally depending on the geomorphological context, particularly in the range of lake area <1 km2 and mountainous regions. The Cajas Massif (Southern Ecuador) holds a tropical mountain lake district with 5955 water bodies. The number of lakes deviates from a power law relationship with the lake area at both ends of the size range; similarly to the distributions found in temperate mountain ranges. The deviation of each distribution tail does not respond to the same cause. The marked relief limits the size of the largest lakes at high altitudes, whereas ponds are prompt to a complete infilling. A bathymetry survey of 202 lakes, selected across the full-size range, revealed a volume-area scaling coefficient larger than those found for other lake areas of glacial origin but softer relief. Water renewal time is not consistently proportional to the lake area due to the volume-area variation in midsize lakes. The 85% of the water surface is in lakes >104 m2 and 50% of the water resources are held in a few ones (∼10) deeper than 18 m. Therefore, midlakes and large lakes are by far more biogeochemically relevant than ponds and shallow lakes in this tropical mountain lake district.
FIGURES 40–44 in Three new Psammothidium species from lakes of Olympic and Cascade Mountains in Washington State, USA
FIGURES 40–44: Psammothidium alpinum sp. nov., SEM. Figs 40–42. Type material, Snow Lake, sample ANSP WACA019 Fig. 40. External view of raphe valve. Fig. 41. Internal view of raphe valve. Fig. 42. External view of rapheless valve. Fig. 43. Internal view of rapheless valve, Hidden Lake NOCA, sample ANSP WACA018. Fig. 44. Areolae on the internal surface of the valve, Snow Lake, sample ANSP WACA001. Scale bars = 1 µm.
FIGURES 35–39 in Three new Psammothidium species from lakes of Olympic and Cascade Mountains in Washington State, USA
FIGURES 35–39: Psammothidium lacustre sp. nov., SEM. Fig. 35. External view of raphe valve, Hidden Lake NOCA, sample ANSP WACA017. Fig. 36. Internal view of raphe valve, type material, sample ANSP WACA019. Fig. 37. Areolae on internal surface of raphe valve, type material, sample ANSP WACA019. Fig. 38. Internal view of rapheless valve, Hidden Lake NOCA, sample ANSP WACA017. Fig. 39. External view of rapheless valve, type material, sample ANSP WACA019. Scale bars = 1 µm
FIGURES 22–34 in Three new Psammothidium species from lakes of Olympic and Cascade Mountains in Washington State, USA
FIGURES 22–34: LM micrographs of Psammothidium species from Snow Lake, Washington Cascades. Figs 22–31. Psammothidium nivale sp. nov. Figs 22–23. Holotype specimen, slide ANSP GC64684. Figs 32–34. Psammothidium helveticum. Scale bar = 10 µm.
FIGURES 1–21 in Three new Psammothidium species from lakes of Olympic and Cascade Mountains in Washington State, USA
FIGURES 1–21: LM micrographs of Psammothidium species from Snow Lake, Washington Cascades. Figs 1–8. Psammothidium lacustre sp. nov. Figs 1–2. Holotype specimen, slide ANSP GC64860. Figs 9–21. Psammothidium alpinum sp. nov. Figs 9–10. Holotype specimen, slide ANSP GC64862. Scale bar = 10 µm.
FIGURES 61–64 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 61–64: Encyonopsis vasijevae, sp. nov., SEM. Figs 61, 62. External valve views. Figs 63, 64. Internal valve views. Fig. 64. Middle part of a valve showing central area and internal proximal raphe ends. Scale bars in Figs 61–63 = 5 µm, in Fig. 64 = 1 µm.
FIGURES 35–44 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 35–44: Neidium species, LM. Figs 35–39. N. rugosum, sp. nov. Fig. 38. Holotype specimen. Figs 40–42. N. holstii. Figs 43, 44. N. boyeri. Scale bar = 10 µm.
FIGURES 22–34 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 22–34: Brachysira species. Figs 22–28, 33, 34. B. subtile, sp. nov. Figs 22–28. LM. Fig. 23. Holotype specimen. Figs 33, 34. SEM. Fig. 33. Internal valve view. Fig. 34. External valve view. Figs 29, 30. B. styriaca, LM. Figs 31, 32. B. zellensis, LM. Scale bar in Fig. 22 = 10 µm for all LM figures, in Figs 33, 34 = 5 µm.
FIGURES 47–60 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 47–60: Encyonema and Encyonopsis species, LM. Figs 47, 48. Encyonema sibiricum. Figs 49–56. Encyonopsis vasijevae, sp. nov. Fig. 51. Holotype specimen. Fig. 57. Encyonema norvegicum. Figs 58, 59. E. lunatum var. borealis. Fig. 60. E. lunatum var. alaskaense. Scale bar = 10 µm.
FIGURES 1–21 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 1–21: Eunotia species. Fig. 1. E. julma. Figs 2–15, 19, 21. E. frigida, sp. nov. Figs 2–15. LM. Fig. 4. Holotype specimen. Figs 19, 21. SEM. Fig. 19. Internal valve view. Fig. 21. External valve view. Figs 16–18, 20. E. ferefalcata. Figs 16–18.LM. Fig. 20. SEM. external valve view. Scale bars in Figs 1 & 2 = 10 µm for all LM figures, in Figs 19–21 = 2 µm.
FIGURES 45–46 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 45–46: Neidium rugosum, sp. nov., SEM. Fig. 45. External valve view. Fig. 46. Internal valve view. Scale bars = 10 µm.
FIGURES 65–76 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 65–76: Fig. 65. Stauroneis crassula, LM. Fig. 66. Pinnularia semicruciata, LM. Figs 67–69. Gomphonema angusticephalum, LM. Figs 70, 71, 76. Naviculadicta mongolica. Figs 70, 71. LM. Fig. 76. SEM, internal valve view. Figs 72, 73. Pinnularia angustarea, LM. Fig. 74. Neidiopsis vekhovii, LM. Fig. 75. N. wulffii, LM. Scale bar = 10 µm.
FIGURE 61 in Late Quaternary Chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania)
FIGURE 61. The relative abundances of some siliceous fossils in Lake Gales, and the ratio of cysts and diatoms.
FIGURES 41–60 in Late Quaternary Chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania)
FIGURES 41–60 The most characteristic stomatocysts of Lake Gales according to their occurrences in the upper five diatom assemblages' zones (between DAZ–6 and DAZ–10). Figs 41–44 DAZ–6: Fig. 41. C072—180 cm; Fig. 42. C050 —180 cm; Fig. 43. C072—180 cm; Fig. 44. C166—180 cm; Figs 45–48 DAZ–7: Fig. 45. C001—168 cm; Fig. 46. C198—168 cm; Fig. 47. C148—168 cm; Fig. 48. C337– 176 cm; Figs 49–52 DAZ–8 Fig. 49. C057– 104 cm; Fig. 50. C324—168 cm; Fig. 51. C004—88 cm; Fig. 52. C180—104 cm; Figs 53–56 DAZ–9: Fig. 53. C133—48 cm; Fig. 54. C220—56 cm; Fig. 55. C092—168 cm; Fig. 56. C357—48 cm; Figs 57–60 DAZ–10: Fig. 57. C336—2 cm; Fig. 58. C035—2 cm; Fig. 59. C243—2 cm; Fig. 60. C345—2 cm.
FIGURES 21–40 in Late Quaternary Chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania)
FIGURES 21–40 The most characteristic stomatocysts of Lake Gales according to their occurrences in the first five diatom assemblages' zones (between DAZ–1 and DAZ–5). Figs 21–24 DAZ–1: Fig. 21. C116—264 cm, Fig. 22. C049—264 cm; Fig. 23. C189—264 cm; Fig. 24; C300B—264 cm; Figs 25–29 DAZ–2: Fig 25. C210—260 cm; Fig. 26. C169—260 cm, Fig. 27. C135—260 cm; Fig. 28. "Unidentified stomatocyst 14"—260 cm; Fig. 29. C079—260 cm; Figs 30–33, DAZ–3: Fig. 30. C189—236 cm, Fig. 31. C318—236 cm; Figs 32–33 C360—236 cm; Figs 34–37 DAZ–4: Fig. 34. C120—196 cm; Fig. 35. C202—196 cm; Fig. 36. C239—196 cm; Fig. 37. C148 note the short, thin spines that are roughly equidistant—196 cm; Figs 38–40 DAZ–5: Fig. 38. C121—188 cm, Fig. 39. C169—188 cm; Fig. 40. C009—188 cm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
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