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184 results for “freshwater habitat”
Figure 9 in Microplastics in commercial fish digestive tracts from freshwater habitats in Northern Thailand
Figure 9. Microplastic type and shape in the GIT of fish samples confirmed by FTIR.
Figure 5 in Microplastics in commercial fish digestive tracts from freshwater habitats in Northern Thailand
Figure 5. Composition of microplastic found in freshwater fish; a) size b) morphotype c) color.
Novel insights into habitat suitability for Amazonian freshwater mussels linked with hydraulic and landscape drivers
<p><span>Novel insights into habitat suitability for two Unionida freshwater mussels, <i>Castalia ambigua</i> Lamarck, 1819 (Hyriidae) and <i>Anodontites elongatus </i><span>(Swainson, 1823) (Mycetopodidae)</span><i>,</i> is presented on the basis of hydraulic variables linked with the riverbed in six 500 m reaches in an eastern Amazonian river basin. Within the reaches, there was strong habitat heterogeneity in hydrodynamics and substrate composition. In addition, we investigated stressors based on landscape modification that are associated with declines in mussel density. We measured hydraulic variables for each 500 m reach, and landscape stressors at two spatial scales (subcatchment and riparian buffer forest). W<span>e used </span><span>the</span> <span>R</span><span>andom </span><span>F</span><span>orest algorithm,</span> a tree-based model, to predict the hydraulic variables linked with habitat suitability for mussels, and to predict which landscape stressors were most associated with mussel density declines. Both mussel species were linked with low substrate heterogeneity and greater riverbed stability (low Froude and Reynolds numbers), especially at high flow (low stream power). Different sediment grain size preferences were observed between mussel species: <i>Castalia ambigua</i> was associated with medium sand, and <i>Anodontites elongatus</i> with medium and fine sand. Declines in mussel density were associated with modifications linked to urbanization at small scales (riparian buffer forest), especially with percent of and distance from rural settlements, distance to the nearest street, and road density. In summary, the high<span> variance </span><span>explained </span><span>in both hydraulic and landscape models</span><span> indicated </span><span>high predictive power, </span><span>suggesting that our findings</span> <span>may be extrapolated </span><span>and used as a baseline to test </span><span><span>hypotheses of habitat suitability </span></span><span><span>in other Amazonian rivers</span></span><span><span> for </span></span><i><span>Castalia ambigua</span></i><span><span> and </span></span><i><span>Anodontites elongatus</span></i><span><span>, and also </span></span><span><span>for</span></span><span><span> other </span></span><span><span>freshwater </span></span><span><span>mussel species</span></span><span>. </span>Our results highlight the urgent need for aquatic habitat conservation to maintain sheltered habitats during high flow as well as mitigate the effects of landscape modifications at the riparian buffer scale, both of which are important for maintaining dense mussel populations and habitat quality.</span></p>
Data from: Genetic divergence outpaces phenotypic evolution among threespine stickleback populations in old freshwater habitats
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Data from: A habitat and a parasite: Adult and larval parasitic freshwater mussels impact habitat choice and predator-prey interactions of a host fish and its prey
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Data from: Increased habitat connectivity homogenizes freshwater communities: historical and landscape perspectives
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Freshwater floodplain habitats buffer native food webs from negative effects of non-native centrarchids and bullfrogs
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Novel insights into habitat suitability for Amazonian freshwater mussels linked with hydraulic and landscape drivers
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Data from: Thermal limits in native and alien freshwater peracarid Crustacea: the role of habitat use and oxygen limitation
1. In order to predict which species can successfully cope with global warming and how other environmental stressors modulate their vulnerability to climate related environmental factors, an understanding of the ecophysiology underpinning thermal limits is essential for both conservation biology a nd invasion biology. 2. Heat tolerance and the extent to which heat tolerance differed with oxygen availability were examined for four native and four alien freshwater peracarid crustacean species, with differences in habitat use across species. Three hypotheses were tested: 1) Heat and lack of oxygen synergistically reduce survival of species; 2) Patterns in heat tolerance and the modulation thereof by oxygen differs between alien and native species, and between species with different habitat use; 3) small animals can better tolerate heat than large animals and this difference is more pronounced under hypoxia. 3. To assess heat tolerances under different oxygen levels, animal survival was monitored in experimental chambers in which the water temperature was ramped up (0.25 ˚C min-1). Heat tolerance (CTmax) was scored as the cessation of all pleopod movement, and heating trials were performed under hypoxia (5kPa Oxygen), normoxia (20 kPa) and hyperoxia (60 kPa). 4. Heat tolerance differed across species as did the extent by which heat tolerance was affected by oxygen conditions. Heat tolerant species, e.g., Asellus aquaticus and Crangonyx pseudogracilis, showed little response to oxygen conditions in their CTmax, whereas the CTmax of heat sensitive species, e.g., Dikerogammarus villosus and Gammarus fossarum, was more plastic, being increased by hyperoxia and reduced by hypoxia. 5. In contrast to other studies on crustaceans, alien species were not more heat tolerant than native species. Instead, differences in heat tolerance were best explained by habitat use, with species from standing waters being heat tolerant and species from running waters being heat sensitive. In addition, larger animals displayed lower CTmax, but only under hypoxia. An analysis of data available in the literature on metabolic responses of the study species to temperature and oxygen conditions suggests that oxygen conformers and species whose oxygen demand rapidly increases with temperature (low activation energy) may be more heat sensitive. 6. The alien species D. villosus appeared most susceptible to hypoxia and heat stress. This may explain why this species is very successful in colonizing new areas in littoral zones with rocky substrate which are well aerated due to continuous wave action generated by passing ships or prevailing winds. This species is less capable of spreading to other waters which are poorly oxygenated and where C. pseudogracilis is the more likely dominant alien species.
FIGURE 14. Typical habitats where Potamotrygon wallacei n in A new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the smallest species of Potamotrygon
FIGURE 14. Typical habitats where Potamotrygon wallacei n. sp. is common. Upper left: Igarapé Daraquá, near the mouth of Rio Itu, left bank of the Rio Negro just above Barcelos (AM, Brazil). Upper right: typical flooded forest ("igapó") habitat (Rio Itu). Lower left: live specimen resting in a tank in the Rio Itu, showing its great transparency. Lower right: Igarapé Cazurucu, affluent of Rio Itu.
Fig. 1. Freshwater interdunal swale showing herbaceous vegetation amid dense Myrica- Baccharis shrubs. A in Rediscovery and Habitat Associations of Photuris Bethaniensis McDermott (Coleoptera: Lampyridae)
Fig. 1. Freshwater interdunal swale showing herbaceous vegetation amid dense Myrica- Baccharis shrubs. A large colony of P. bethaniensis was reported from this swale during 1951 and relocated during 1998.
FIGURE 3 in New species, Parahelicomyces yunnanensis sp. nov. and Tubeufia nigroseptum sp. nov. from freshwater habitats in Yunnan, China
FIGURE 3. Tubeufia nigroseptum (KUN-HKAS 115528, holotype). a Colony on decaying wood. b Conidiophores, conidiogenous cells and conidia. c Conidiogenous cells. d–f Conidiophores with attached conidia. g–l Conidia. m Germinating conidium. n–o Colony on PDA from above and below. Scale bars: b, d–f = 30 μm, c = 10 μm, g–m = 20 μm.
FIGURE 2 in New species, Parahelicomyces yunnanensis sp. nov. and Tubeufia nigroseptum sp. nov. from freshwater habitats in Yunnan, China
FIGURE 2. Parahelicomyces yunnanensis (KUN-HKAS 115525, holotype). a Colony on decaying wood. b–d Conidiophores with attached conidia. e–f Conidiogenous cells. g–m Conidia. n Germinating conidium. Scale bars: b = 90 μm, c–d =40 μm, e–f = 10 μm, g–m = 20 μm.
FIGURE 1 in New species, Parahelicomyces yunnanensis sp. nov. and Tubeufia nigroseptum sp. nov. from freshwater habitats in Yunnan, China
FIGURE 1. Phylogram generated from maximum likelihood analysis based on combined ITS, LSU, TEF1-α and RPB2 sequence data for species of Tubeufiaceae. RAxML bootstrap support values equal to or greater than 75% are given before the forward slash. Branches with bayesian posterior probabilities equal to or higher than 0.95 are given after the forward slash. Newly generated sequences are in bold and red. The tree is rooted at Botryosphaeria dothidea CBS 115476. Ex-type strains are indicated H after strains numbers.
FIGURE 1 in Neoascotaiwania aquatica sp. nov. from a freshwater habitat in Yunnan Province, China
FIGURE 1. Phylogram generated from maximum likelihood analysis (RAxML) based on combined LSU, SSU, ITS, TEF1-α and RPB2 sequence data of selected taxa in Savoryellaceae, with Pleurotheciella submersa (MFLUCC 17–1709 and MFLUCC 17–0456) as outgroup taxon. Bootstrap support values for maximum likelihood (ML) ≥ 75% and Bayesian posterior probabilities (PP) ≥ 0.95 are given above the nodes. New taxa are indicated in red and the type strains are in bold.
FIGURE 2 in Neoascotaiwania aquatica sp. nov. from a freshwater habitat in Yunnan Province, China
FIGURE 2. Neoascotaiwania aquatica (HKAS 115790, holotype) a–c. Colonies on wood. d–k. Conidiophores with conidia. l–n. conidia. o germinating condium. p–q. Cultures on PDA from above and below. Scale bars: d–o = 20 µm.
FIGURE 2 in Xenoastrosphaeriella aquatica sp. nov. from freshwater habitat in Yunnan Province, China
FIGURE 2. Xenoastrosphaeriella aquatica (KUN-HKAS 115792, holotype). a, b Appearance of ascomata on host substrate. c Pseudoparaphyses. d Vertical section through ascoma. e, f Parts of peridium. g–l Asci. m–r Ascospores. Scale bars: d = 200 μm, e = 50 μm, f–l = 30 μm, c, m–r = 20μm.
FIGURE 1 in Xenoastrosphaeriella aquatica sp. nov. from freshwater habitat in Yunnan Province, China
FIGURE 1. Phylogram generated from maximum likelihood analysis based on combined LSU, SSU and tef1-α sequence data. Bootstrap values for maximum likelihood (ML) equal to or greater than 75% and clade credibility values greater than 0.95 from Bayesian-inference analysis were labelled on the branches. The ex-type strains are in bold. The newly generated sequences are indicated in red.
FIGURE 2 in Pseudomonodictys aquatica sp. nov., the sexual morph of Pseudomonodictys from freshwater habitats
FIGURE 2. Pseudomonodictys aquatica (MFLU 22–0079, holotype). a–c. The appearance of ascomata on host substrate. d. Vertical section of ascoma. e. Ostiole. f, h. Peridium. g. Pseudoparaphyses. i–m. Asci. n-q. Ascospores. r. Germinating ascospore. s, t. Culture on PDA. Scale bars: d–e = 100 µm, f–h = 30 µm, i–m = 50 µm, n–r = 20 µm.
FIGURE 1 in Pseudomonodictys aquatica sp. nov., the sexual morph of Pseudomonodictys from freshwater habitats
FIGURE 1. RAxML tree based on combined ITS, LSU, SSU and TEF1-α sequence data. Bootstrap support values for Maximum likelihood (ML) and Bayesian posterior probabilities (BYPP) ≥0.95 are indicated above the nodes as ML/PP. The tree is rooted with Melanomma pulvis-pyrius (CBS 124080). The ex-type strains are shown in bold and new isolates are in red.
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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.