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335 results for “freshwater lake”
FIGURE 1 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 1 Map of Lake Biwa (A) and Oura Bay (B) showing 15 sampling localities: blue, Semisulcospira niponica; green, S. fuscata; purple, S. watanabei sp. nov.; red, S. nakanoi sp. nov.; orange, S. salebrosa sp. nov; black, putative hybrid between S. fuscata and S. watanabei sp. nov.
FIGURE 10 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 10 Shells of Semisulcospira nakanoi sp. nov. A–G, Holotype, KUZ Z4122. H–J, Paratype, KUZ Z4125. K–L, Paratype, KUZ Z4126. M–Q, Specimens from Onoe Port, KUZ Z4129, Z4130. A–C, H, K, M, P, Adult shell. A–C, H, M, Female. K, P, Male. D, I, L, N, Q, Operculum. E–G, J, O, Embryonic shell. Scale bars: 10 mm (A–D, H–I, K–L, M–N, P–Q), 1 mm (E–G, J, O). All specimens were treated with 3% sodium hypochlorite
FIGURE 12 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 12 Radulae of Semisulcospira species. A–G, Semisulcospira niponica: A, Oura Port, KUZ Z4091; B, Nagahama Port, KUZ Z4093; C, Iso, KUZ Z4095; D, Kitakomatsu Port, KUZ Z4097; E, Katata Port, KUZ Z4099; F, Otsu Port, KUZ Z4101; G, Nango, KUZ Z4103. H–J, Semisulcospira fuscata: H, Lake Yogo, KUZ Z4103; I, Oura, KUZ Z4105; J, Nihonmatsu, KUZ Z4107. K–L, Semisulcospira watanabei sp. nov.: K, Kitakomatsu Port, KUZ Z4115; L, Horikiri Port, KUZ Z4120. M–N, Semisulcospira nakanoi sp. nov.: M, Onoe Port, KUZ Z4129; N, Chikubu-shima Island, KUZ Z4127. O–P, Semisulcospira salebrosa sp. nov.: O, Take-shima Island, KUZ Z4138; P, Shiraishi-jima Island, KUZ Z4136. Scale bars: 100 Μm
Climate-associated variation in the drivers of benthic macroinvertebrate species-area relationships across shallow freshwater lakes
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Data from: Thermal response of freshwater ciliates: can they survive at elevated lake temperatures?
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Data from: Evolutionary rescue of freshwater copepods during historical lake acidification
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Data from: Freshwater hydrozoan blooms alter activity and behaviour of territorial cichlids in Lake Tanganyika
Jellyfish blooms pose multiple threats to wild fish. Yet, we still know little about how blooms impact fitness-related behaviours of fish caught within their areas of effect, e.g. for littoral fish that are not able to relocate to avoid incoming blooms of stinging jellyfish. Here, we documented the behavioural impacts of freshwater jellyfish (Limnocnida tanganjicae) blooms on a territorial cichlid (Variabilichromis moorii) as well as on the wider community of cichlids in a shallow-water rocky habitat of Lake Tanganyika. Compared to non-bloom conditions, V. moorii individuals reduced their swimming and territory defence activities during jellyfish blooms (each by ~ 50%), but not their foraging or affiliative behaviours. Despite this reduction in activity, V. moorii could not entirely avoid being stung and preferred to remain closer to the rocky substrata as opposed to the more open demersal zone. Many other fishes similarly hid among the benthic substrata, changing the composition of the fish community in the demersal zone during bloom conditions. Reductions in activity could have multiple fitness-related implications for individual fish. Understanding these behavioural consequences is an important topic of research as blooms are predicted to increase in severity in the future especially along coastal habitats.
Assessing the conservation priority of freshwater lake sites based on taxonomic, functional and environmental uniqueness
<p><strong>Aim: </strong>We propose a novel approach that considers taxonomic uniqueness, functional uniqueness and environmental uniqueness, and show how it can be used in guiding conservation planning. We illustrate the approach using data for lake biota and environment.</p> <p><strong>Location: </strong>Lake Puruvesi, Finland.</p> <p><strong>Methods: </strong>We sampled macrophytes and macroinvertebrates from the same 18 littoral sites. By adapting the original 'ecological uniqueness' approach, we used distance‒based methods to calculate measures of taxonomic (LCBD‒t), functional (LCBD‒f) and environmental (LCEH) uniqueness for each site. We also considered the numbers and locations of the sites needed to protect up to 70% of total variation in taxonomic, functional or environmental features in the studied part of the lake.</p> <p><strong>Results: </strong>Relationships between taxonomic (LCBD‒t), functional (LCBD‒f) and environmental (LCEH) uniqueness were generally weak, and only the relationship between macrophyte LCBD‒t and LCBD‒f was statistically significant. Overall, however, if the whole biotic dataset was considered, macroinvertebrate LCBD‒f values showed a consistent positive relationship with macrophyte LCBD‒f. Depending on the measure of site uniqueness, between one third to one half of the sites could help protect up to 70% of the ecological uniqueness of the studied part of Lake Puruvesi.</p> <p><strong>Main conclusions: </strong>Although the dataset examined originated from a large lake system, the approach we proposed here can be applied in different ecosystems and at various spatial scales. An important consideration is that a set of sites has been sampled using the same methods, resulting in species and environmental matrices that can be analysed using the methodological approach proposed here. This framework can be easily applied to grid‒based data, sets of islands, or sets of forest fragments. We suggest that the approach based on taxonomic, functional and environmental uniqueness will be a useful tool in guiding nature conservation and ecosystem management, especially if associated with meta‒system ideas or network thinking.</p>
Fig. 1 in Free-living freshwater nematodes in Vlasina Lake (Serbia, Pčina District, Surdulica Municipality)
Fig. 1. Vlasina Lake (Photo: Stefan Stoichev).
The effect of eutrophication and global change on heterocystous cyanobacteria in freshwater lakes
<p>Eutrophication and global change have been suggested to promote cyanobacterial blooms. <em>Anabaena, Aphanizomenon and Cylindrospermopsis</em> are heterocystous genera of toxin-producing cyanobacteria. It is yet unclear how eutrophication and climate change will impact heterocystous cyanobacteria. This study investigates the effects of total nitrogen (TN), total phosphorus (TP), TN:TP ratio, temperature, pH and trophic state on the relative abundance of three heterocystous cyanobacteria, using data of 999 lakes obtained from the National Lake Assessment 2012 (NLA) of the U.S. Environmental Protection Agency (EPA). It was demonstrated that elevated TN and TP levels, as well as higher pH levels are related to higher abundance of heterocystous cyanobacteria. <em>Cylindrospermopsis</em> is correlated with TN and temperature, <em>Aphanizomenon</em> is related with TP and negatively correlated to TN:TP. All three heterocysts are correlated with pH. Eutrophication has a higher effect on the relative abundance of heterocystous cyanobacteria than the increased temperatures and increased CO<sub>2</sub> concentrations. Decreasing the concentration of nitrogen and especially phosphorus in lakes may limit the relative abundance of heterocystous cyanobacteria in fresh waters.</p>
Figure 2 in The ecology of freshwater bivalves in the Lake Sapanca basin, Turkey
Figure 2. Growth curves of Unio crassus and U. pictorum from the Lake Sapanca basin.
Figure 1 in The ecology of freshwater bivalves in the Lake Sapanca basin, Turkey
Figure 1. Sampling sites in the Lake Sapanca basin.
Figure. Location of the Beyşehir and Eğirdir lakes in Türkiye. in Health risk assessments of heavy metal concentrations via consumption of an invasive species, Carassius gibelio, from two large freshwater lakes of Türkiye
Figure. Location of the Beyşehir and Eğirdir lakes in Türkiye.
Code for Manuscript - Near-term lake water temperature forecasts can be used to anticipate the ecological dynamics of freshwater species -
<p>Code for Manuscript - Near-term lake water temperature forecasts can be used to anticipate the ecological dynamics of freshwater species -</p>
Figure 10. Vorticella, a in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 10. Vorticella, a specimen and its stalk.
Figure 9 in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 9. Cothurnia, view of the attachment of the ciliate to the surface of the basibiont.
Figure 6 in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 6. Thuricola, the zooid inside the lorica and the operculum.
Figure 3 in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 3. Acineta, view of the apical area with the tentacles (SEM).
Figure 5. Acineta, a specimen with a in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 5. Acineta, a specimen with a larval stage in the apical surface.
Figure 4 in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 4. Acineta, lateral view showing the actinophores and the stalk.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.