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44 results for “Freshwater springs”
Figure 2 in Monthly variations in the shell structure of two freshwater ostracod (Crustacea) species in Karapınar Spring (Bolu, Turkey)
Figure 2. SEM photos of (A) Potamocypris similis, left valve inner view; and (B) Psychrodromus olivaceus, carapace right valve external view. Scale bar = 100 µm.
Date Figure 4 in Monthly variations in the shell structure of two freshwater ostracod (Crustacea) species in Karapınar Spring (Bolu, Turkey)
Date Figure 4. Sr/Ca ratio in the valves of P. similis (PS) and P. olivaceus (PO) from Karapınar Spring. Note that the far left point in the circle is an outlier.
Supplementary data for: Effects of thermal acclimation on the proteome of the planarian Crenobia alpina from an alpine freshwater spring
<p>Species' acclimation capacities and their ability to maintain molecular homeostasis outside of ideal temperature ranges will partly predict their success following climate-change induced thermal regime shifts. Theory predicts that ectothermic organisms from thermally stable environments have muted plasticities, and that these species <span>may be</span> particularly vulnerable to temperature increase. Whether such species retained or lost acclimation capacities remains largely unknown. We studied proteome changes in the planarian <em>Crenobia alpina</em>, a prominent member of cold-stable alpine habitats that is considered to be cold-adapted stenotherm. We found that the species' CT<sub>max</sub> is above its experienced habitat temperatures and that different populations exhibit differential CTmax acclimation capacities, whereby an alpine population showed reduced plasticity. In a separate experiment, we acclimated <em>C. alpina</em> individuals from the alpine population to 8, 11, 14, or 17°C over the course of 168 h and compared a comprehensively annotated species-specific proteome. Network analyses of 3399 proteins and protein set enrichment show that while the species' proteome is overall stable across these temperatures, protein sets functioning in oxidative stress response, mitochondria, protein synthesis and turnover are lower abundant following warm acclimation. Proteins associated with an unfolded protein response, ciliogenesis, tissue damage repair, development, and the innate immune system were higher abundant following warm acclimation. Our findings suggest that this species has not suffered DNA decay (e.g., loss of heat-shock proteins) during evolution in a cold-stable environment and retained plasticity in response to elevated temperatures, challenging the notion that stable environments necessarily result in muted plasticity.</p>
Figure 1 in Monthly variations in the shell structure of two freshwater ostracod (Crustacea) species in Karapınar Spring (Bolu, Turkey)
Figure 1. Location of Karapınar Spring.
Supplementary data for: Effects of thermal acclimation on the proteome of the planarian Crenobia alpina from an alpine freshwater spring
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Data from: Altered spring phenology of North American freshwater turtles and the importance of representative populations
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Data from: Ecological effects on metabolic scaling amphipod responses to fish predators in freshwater springs
Metabolic rate is commonly thought to scale with body mass to the 3/4-power as a result of universal body-design constraints. However, recent comparative work has shown that the metabolic scaling slope may vary significantly among species and higher taxa, apparently in response to different lifestyles and ecological conditions, though the precise mechanisms involved are not well understood. To better understand these under-appreciated ecological effects and their causes, it is important to control for extraneous phylogenetic and environmental influences. We demonstrate how this may be done by comparing the ontogenetic scaling of resting metabolic rate among populations of the same species (the amphipod Gammarus minus) in mid-Appalachian freshwater springs with similar, relatively constant environmental conditions, except for the varying presence of the predatory fish Cottus cognatus. We found that populations of G. minus exhibit significantly lower metabolic scaling slopes (0.54 to 0.62) in three freshwater springs with C. cognatus than in two springs without these fish (0.76 to 0.77). We tested multiple hypothetical causes for these population differences. Our results best supported the hypothesis that metabolic scaling was influenced by the effects of size-selective predation on the ontogeny of growth, a metabolically expensive process. The body-size scaling of growth is significantly less steep in the populations inhabiting springs with versus without fish, thus paralleling the interpopulation differences in metabolic scaling. Prematurational growth of G. minus is as high or higher in the fish springs, whereas postmaturational growth is significantly lower, often approaching zero. Similarly the amphipods in the fish springs tend to have higher metabolic rates at small sizes, but lower metabolic rates at large sizes, compared to those in the fishless springs. Our results do not support other hypothetical causes of the interpopulation variation in metabolic scaling, including differential scaling of cell size or low-metabolism body components (fat and mineralized exoskeleton), or possible effects of other environmental factors associated with the presence of fish. However, fish-induced population differences in adult behavioral activity may influence metabolic scaling in G. minus, a possibility under current study. We conclude that ecological factors may significantly influence metabolic scaling, contrary to common belief.
FIGURE 5 in Crangonyx islandicus sp. nov., a subterranean freshwater amphipod (Crustacea, Amphipoda, Crangonyctidae) from springs in lava fields in Iceland
FIGURE 5. Crangonyx islandicus sp. nov., female paratype, 6.2 mm, Vatnsvik. A, pereopod 6. B, coxa of pereopod 6. C, pereopod 7. D, spines distally on carpus of pereopod 7. E, pleopod 1. F, pleopod 2. G, pleopod 3. Scale: A–C = 0.5 mm; D = 0.1 mm; E–G = 0.5 mm.
FIGURE 2 in Crangonyx islandicus sp. nov., a subterranean freshwater amphipod (Crustacea, Amphipoda, Crangonyctidae) from springs in lava fields in Iceland
FIGURE 2. Crangonyx islandicus sp. nov., female paratype, 6.2 mm, Vatnsvik. A, antenna 1. B, distal part of flagellum of antenna 1. C, accessory flagellum of antenna 1. D, antenna 2. E, upper lip. F, left mandible, G, lacina mobilis and incisor. H, mandibular palp. I, lower lip. J, maxilla 1. K, maxilla 2. Scale: A, B = 0.5; C–K = 0.1 mm.
FIGURE 7. Sites with C in Crangonyx islandicus sp. nov., a subterranean freshwater amphipod (Crustacea, Amphipoda, Crangonyctidae) from springs in lava fields in Iceland
FIGURE 7. Sites with C. islandicus sp. nov. in Iceland. The large recent glaciers, i.e. Langjökull, Hofsjökull and Vatnajökull, are shown, as well as the large lakes, i.e. Lake Thingvallavatn and Lake Myvatn. Recent lava fields (since last glaciation; <18.000 years, shaded area) are shown as well as the plate boundaries. Source: Institute of Earth Sciences, University of Iceland.
FIGURE 6 in Crangonyx islandicus sp. nov., a subterranean freshwater amphipod (Crustacea, Amphipoda, Crangonyctidae) from springs in lava fields in Iceland
FIGURE 6. Crangonyx islandicus sp. nov., female paratype, 6.2 mm, Vatnsvik. A, uropod 1. B, uropod 2. C, uropod 3. D, uropod 3 and telson. E, telson. Scale: A–D = 0.5 mm; E = 0.1 mm.
FIGURE 3 in Crangonyx islandicus sp. nov., a subterranean freshwater amphipod (Crustacea, Amphipoda, Crangonyctidae) from springs in lava fields in Iceland
FIGURE 3. Crangonyx islandicus sp. nov., female paratype, 6.2 mm, Vatnsvik. A, maxilliped. B, outer plate of maxilliped. C, inner plate of maxilliped. D, gnathopod 1. E, propodus and dactylus of gnathopod 1. F, short spines medially on gnathopod 1, in relation to largest two lateral bifid spines. G, gnathopod 2. H, distal part of propodus and dactylus of gnathopod 2. Scale: A = 0.5 mm; B, C, E, H = 0.5 mm; D, G = 0.1 mm.
FIGURE 8. Wangiannachiltonia guzikae n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 8. Wangiannachiltonia guzikae n. sp., morphological variety: A, distal end of male gnathopod 2 (Elizabeth Springs); B, uropod 2 (Old Finnis Springs); C, female pereopod 7 (Old Finnis Springs); D, distal end of male gnathopod 2 (Coward Springs); E, uropod 2 (Coward Springs).
FIGURE 7. Wangiannachiltonia guzikae n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 7. Wangiannachiltonia guzikae n. sp., paratype female, 2.6 mm. A, gnathopod 1; B, gnathopod 2; C, right and left uropod 3; D, oostegite on pereonite 2; E, oostegite on pereonite 3; F, oostegite on pereonite 4; G, oostegite on pereonite 5. Scales: 1(A–B), 0.1 mm; 2(C), 0.05 mm; 3(D–G), 0.1 mm.
FIGURE 6. Wangiannachiltonia guzikae n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 6. Wangiannachiltonia guzikae n. sp., holotype male, 2.9 mm. A, gnathopod 1 (with enlargement); B, gnathopod 2 (with enlargement); C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pereopod 6; G, pereopod 7; H, uropod 1; I, uropod 2; J, telson; K, right and left uropod 3. Scales: 1(A–g), 0.1 mm; 2(H–J) 0.5 mm; 3(K), 0.5 mm.
FIGURE 5. Wangiannachiltonia guzikae n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 5. Wangiannachiltonia guzikae n. sp., holotype male, 2.9 mm. A, whole body, lateral view; B, antenna 1; C, antenna 2; D, maxilliped; E, maxilla 2; F, maxilla 1; G, upper lip; H, lower lip; I, right mandible; J, left mandible. Scales: 1(A), 0.1 mm; 2(B–C), 0.1 mm; 3(D–J), 0.05 mm.
FIGURE 3. Arabunnachiltonia murphyi n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 3. Arabunnachiltonia murphyi n. sp., holotype male, 2.0 mm. A, gnathopod 1 (with enlargement); B, gnathopod 2 (with enlargement); C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pereopod 6; G, pereopod 7; H, uropod 1; I, uropod 2; J, telson; K, uropod 3 (right and left). Scales: 1(A–B), 0.1 mm; 2(C–G), 0.1 mm; 3(H–J), 0.5 mm.
FIGURE 1. A in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 1. A, map of eastern Australia showing the location of the underlying Great Artesian Basin (GAB) (The Lake Eyre region is highlighted). After Mudd, 2000; B, Enlarged map of the Lake Eyre spring groups. After Murphy et al., 2009.
FIGURE 4. Arabunnachiltonia murphyi n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 4. Arabunnachiltonia murphyi n. sp., allotype female, 2.0 mm. A, gnathopod 1 (with enlargement); B, gnathopod 2 (with enlargement); C, antenna1; D, antenna 2; E, distal end of pereopod 3; F, distal end of pereopod 4; G, oostegite on pereonite 2; H, oostegite on pereonite 3; I, oostegite on pereonite 4; J, oostegite on pereonite 5. Scales: 1(A– B), 0.1 mm; 2(C–D), 0.1 mm; 3(E–F), 0.1 mm; 4(G–J), 0.1 mm.
FIGURE 2. Arabunnachiltonia murphyi n in Two new genera and species of chiltoniid amphipods (Crustacea: Amphipoda: Talitroidea) from freshwater mound springs in South Australia
FIGURE 2. Arabunnachiltonia murphyi n. sp., holotype male, 2.0 mm. A, whole body, lateral view; B, antenna 1; C, antenna 2; D, maxilliped; E, maxilla 2; F, maxilla 1; G, upper lip; H, lower lip; I, right mandible; J, left mandible. Scales: 1(A), 0.1 mm; 2(B–C), 0.1 mm; 3(D–J), 0.05 mm.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.