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88 results for “freshwater biodiversity”
FreshLanDiv: A global database of freshwater biodiversity across different land uses
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Data from: Spatial representativeness of environmental DNA metabarcoding signal for fish biodiversity assessment in a natural freshwater system
In the last few years, the study of environmental DNA (eDNA) has drawn attention for many reasons, including its advantages for monitoring and conservation purposes. So far, in aquatic environments, most of eDNA research has focused on the detection of single species using species-specific markers. Recently, species inventories based on the analysis of a single generalist marker targeting a larger taxonomic group (eDNA metabarcoding) have proven useful for bony fish and amphibian biodiversity surveys. This approach involves in situ filtering of large volumes of water followed by amplification and sequencing of a short discriminative fragment from the 12S rDNA mitochondrial gene. In this study, we went one step further by investigating the spatial representativeness (i.e. ecological reliability and signal variability in space) of eDNA metabarcoding for large-scale fish biodiversity assessment in a freshwater system including lentic and lotic environments. We tested the ability of this approach to characterize large-scale organization of fish communities along a longitudinal gradient, from a lake to the outflowing river. First, our results confirm that eDNA metabarcoding is more efficient than a single traditional sampling campaign to detect species presence, especially in rivers. Second, the species list obtained using this approach is comparable to the one obtained when cumulating all traditional sampling sessions since 1995 and 1988 for the lake and the river, respectively. In conclusion, eDNA metabarcoding gives a faithful description of local fish biodiversity in the study system, more specifically within a range of a few kilometers along the river in our study conditions, i.e. longer than a traditional fish sampling site.
Data from: A multigene molecular assessment of cryptic biodiversity in the iconic freshwater blackfishes (Teleostei: Percichthyidae: Gadopsis) of south-eastern Australia
Freshwater biodiversity is under ever increasing threat from human activities, and its conservation and management require a sound knowledge of species-level taxonomy. Cryptic biodiversity is a common feature for aquatic systems, particularly in Australia, where recent genetic assessments suggest that the actual number of freshwater fish species may be considerably higher than currently listed. The freshwater blackfishes (genus Gadopsis) are an iconic group in south-eastern Australia and, in combination with their broad, naturally divided distribution and biological attributes that might limit dispersal, as well as ongoing taxonomic uncertainty, they comprise an ideal study group for assessing cryptic biodiversity. We used a multigene molecular assessment including both nuclear (51 allozyme loci; two S7 introns) and matrilineal markers (cytb) to assess species boundaries and broad genetic substructure within freshwater blackfishes. Range-wide examination demonstrates the presence of at least six candidate species across two nominal taxa, Gadopsis marmoratus and Gadopsis bispinosus. Phylogeographical patterns often aligned to purported biogeographical provinces but occasionally reflected more restricted and unexpected relationships. We highlight key issues with taxonomy, conservation, and management for a species group in a highly modified region.
FIGURE 11 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 11. Tubella repens: (a) megascleres, (b) gemmuloscleres, (c,d) gemmules. Scale bars: a 50µm; b 5µm; c,d—100µm
FIGURE 4 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 4. Uruguaya corallioides: (a) megasclere strongyle; (b) megasclere oxea; (c) gemmuloscleres; (d) detail of gemmuloscleres surface. Scale bars: a, b, c—50µm, d—5µm.
FIGURE 7 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 7. Ephydatia caatingae sp. nov.: (a) megascleres; (b) gemmuloscleres; (c,d) gemmules. Scale bars: a—100µm; b— 10µm; c—100µm; d—50µm
FIGURE 3 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 3. Oncosclera navicella: (a) UFPEPOR1117 specimen; (b) megasclere; (c) gemmulosclere. Scale bars: a—1cm; b— 90µm; c—30µm.
FIGURE 6 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 6. Ephydatia caatingae sp. nov. Specimens in situ: (a) UFPEPOR1733 (Holotype); (b) UFPEPOR1736 (Paratype). Scale bars: 1cm.
FIGURE 2 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 2. Drulia cristata: (a,b) megasclere strongyles; (c,d) microsclere oxeas; (e) detail of gemmule surface with gemmuloscleres embedded. Scale bars: 50µm.
FIGURE 12 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 12. Tubella variabilis: (a) UFPEPOR943 specimen in situ, (b) megasclere, (c-d) gemmules, (e) gemmuloscleres. Scalebar: a—2cm, b,c,d—50µm, e—10µm.
FIGURE 10 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 10. Tubella delicata: (a) UFPEPOR1297 specimen in situ, (b-c) megascleres, (d–f) gemmuloscleres, (g) gemmule. Scale bars: a—1cm, b, c 100µm, d-f 20µm, g 100µm.
FIGURE 9 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 9. Heteromeyenia cristalina: (a) UFPEPOR941 specimen in situ; (b) megasclere; (c) microsclere; (d) gemmuloscleres; (e-f) gemmules. Scale bars: a—2cm, b—50µm, c,d—30µm, e,f—100µm.
FIGURE 5 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 5. Corvoheteromeyenia heterosclera: (a) megasclere; (b) microsclere pseudobirotules small; (c-d) microsclere pseudobirotule large; (e-l) gemmuloscleres; (m,n) gemmules. Scale bars: a—50µm; b—5µm; c, d—10µm; (e–l)—20µm; m, n—100µm.
FIGURE 8 in Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics
FIGURE 8. Eunapius fragilis: (a) UFPEPOR1344 specimen in situ; (b) megasclere; (c) gemmuloscleres; (d,e) gemmules. Scale bars: a—2cm, (b–e)—50µm.
Figure 3. from Collecting and Preserving Marine and Freshwater Isopoda (Crustacea: Peracarida) - Biodiversity Data Journal 3: e4912 (12 May 2015) https://doi.org/10.3897/BDJ.3.e4912
Figure 3. - N. Dean Pentcheff removing live isopod specimens from a coral rubble washed sample.
Supplementary file pwt: United States vendors for commonly used supplies. from Collecting and Preserving Marine and Freshwater Isopoda (Crustacea: Peracarida) - Biodiversity Data Journal 3: e4912 (12 May 2015) https://doi.org/10.3897/BDJ.3.e4912
United States vendors for commonly used supplies.
FIGURE 8 in Water beetles from the Bokkeveld Plateau: a semi-arid hotspot of freshwater biodiversity in the Northern Cape of South Africa
FIGURE 8. Habitats on the Bokkeveld Plateau. A) Oorlogskloof Canyon, pools in stream above Papkuilsfontein Waterfall (Site 12); B) Oorlogskloof Reserve, stream pools close to Groot Tuin entrance (Site 13); C) Oorlogskloof Reserve, spring pool at head of stream at Groot Tuin (Site 14). Photos D. T. Bilton.
FIGURE 6 in Water beetles from the Bokkeveld Plateau: a semi-arid hotspot of freshwater biodiversity in the Northern Cape of South Africa
FIGURE 6. Habitats on the Bokkeveld Plateau. A–B) Avontuur Reserve, stream below Fynbos Cottage (Site 5); B) C) Oorlogskloof Reserve, Oorlogskloof River below Driefontein Waterfall (Site 11) Photos D. T. Bilton.
FIGURE 5 in Water beetles from the Bokkeveld Plateau: a semi-arid hotspot of freshwater biodiversity in the Northern Cape of South Africa
FIGURE 5. Habitats on the Bokkeveld Plateau. A) Avontuur Reserve, margins of Kromvlei (Site 8); B) Avontuur Reserve, pools in drying stream (Site 7); C) Oorlogskloof Reserve, wet rocks & stream below Driefontein Waterfall (Sites 9 & 10; stream below large boulders in photo); D) Oorlogskloof Reserve, wet rocks below Driefontein Waterfall (Site 9—with Andy Foggo). Photos D. T. Bilton.
FIGURE 4 in Water beetles from the Bokkeveld Plateau: a semi-arid hotspot of freshwater biodiversity in the Northern Cape of South Africa
FIGURE 4. Habitats on the Bokkeveld Plateau. A) Plateau margin close to Kromvlei on Avontuur Reserve, emphasising isolation from Knersvlakte below; B) Avontuur Reserve, vernal pools on clay (Site 6); C) Vernal pool on sand ca. 1 km E of Vanrhyn's Pass (Site 4); D) Vernal pool on sand/silt ca. 2 km E of Vanrhyn's Pass (Site 1). Photos D. T. & R. Bilton.
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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.