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Fig. 2 in Compositional change in fish assemblages along the Andean piedmont - Llanos floodplain gradient of the río Portuguesa, Venezuela
Fig. 2. DCA ordination of species assemblages at survey sites in three different elevational zones along the longitudinal gradient of the Portuguesa River, Venezuela: Camaguan, 50-100 m (open squares); Middle, 100-150 m (filled circles); and Upper, 150-200 m (open triangles). The three regions were significantly different in assemblage composition (MANOVA, p <0.0001).
Fig.1 in Compositional change in fish assemblages along the Andean piedmont - Llanos floodplain gradient of the río Portuguesa, Venezuela
Fig.1. Map of Venezuela with inset showing locations of survey sites (n=28, filled circles) along the río Portuguesa elevational gradient.
Fig. 6 in Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil
Fig. 6. Hybrid multidimensional scaling (HMDS) ordination plot in two dimensions of benthic fish assemblage), River (b; ->7m). This ordination explained ~39% of the variance in the association matrix (r2 = 0,384).
Fig. 5. Estimated species richness E in Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil
Fig. 5. Estimated species richness E(Sn) by strata at rio Negro (a-Sep, b-Nov 1997 and c-Feb 1998) and rio Branco (d-Sep
Fig. 3. Estimated species richness E in Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil
Fig. 3. Estimated species richness E(Sn) by months of collection for (a) rio Negro and (b) rio Branco.
Fig. 4 in Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil
Fig. 4. Temporal and spatial variation of CPUA in number of individuals (ind.m-2.103 - a and c) and biomass (g.m-2.103 - b and d) captured on the rio Negro (a and b) and rio Branco (c and d) for each trawl in: () Sep; () Nov (just in rio Negro) 1997 and () Feb 1998.
Fig. 5. Correlation between PCA axis 1 in Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year
Fig. 5. Correlation between PCA axis 1 and species richness (a), density (b), and biomass (c) in connected [February (), May (), November ()] and disconnected lagoons, May (), August (), November ()]. Arrows indicate the direction of the limnological variables influence.
Fig. 4 in Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year
Fig. 4. DCA ordination of sample sites by month in connected [February (), May (), November ()] and disconnected lagoons [, May (), August (), November ()]. Arrows indicate the direction of influence of species in the ordination.
Fig. 2 in Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year
Fig. 2. Daily variation of pluviometric (a) and hydrometric levels (c) of the Paraná River in 2000, measured at Porto São José municipality, and difference between mean monthly pluviometric (b) and hydrometric levels (d) in 2000 (x) and the last 10 1 years (x). Data supplied by DNAEE (Departamento Nacional de Águas e Energia Elétrica). Dashed line indicates water level 2 required for initial inundation of the floodplain (Veríssimo, 1994).
Fig. 1 in Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year
Fig. 1. Study area with location of sampling sites in connected (1-6) and disconnected lagoons (7-15): 1 (Leopoldo),
Figure 11 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 11. Size (length of dentaries, mm) of lizard groups in the late Eocene and early Oligocene of Europe.
Figure 12 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 12. Trophic diversity and relative abundance for late Eocene and early Oligocene lizard faunas in Europe. Carnivorous = vertebrate-eater.
Figure 8 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 8. Necrosaurus sp., complete frontal, IRSNB R 249, previously BOU-AR-42-RS. 8a, dorsal view; 8b, ventral view.
Figure 6 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 6. Dopasia roqueprunensis, incomplete parietal, IRSNB R 247, previously BOU-AR-38-RS. 6a, dorsal view; 6b, ventral view.
Figure 5 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 5. Dopasia roqueprunensis, nearly complete left dentary, IRSNB R 246, previously BOU-AR-26-RS. 5a, lateral view; 5b, medial view.
Figure 1. Lacerta s.l in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 1. Lacerta s.l. filholi, nearly complete left dentary, IRSNB R242, previously BOU-AR-27-RS. 1a, lateral view; 1b, medial view.
Figure 3 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 3. Scincoidea undetermined incomplete left dentary, lacking its anterior part, IRSNB R 244, previously BOU-AR-37-RS. 3a, lateral view; 3b, medial view.
Figure 10 in An assemblage of early Oligocene lizards (Squamata) from the locality of Boutersem (Belgium), with comments on the Eocene-Oligocene transition
Figure 10. Diversity and extinction of lizard groups in the late Eocene and early Oligocene of Europe.
Data for: Modeling the transition of death assemblages through the mixed layer predicts a downcore increase in time averaging
<p>Understanding how time averaging changes during the burial is essential for using Holocene and Anthropocene cores to analyze ecosystem change, given the many ways in which the time averaging affects biodiversity measures. Here, we use transition-rate matrices to explore how time averaging changes downcore when shells transit through a taphonomically-complex mixed layer into permanently-buried historical layers: this is a null model, without any temporal changes in rates of sedimentation or bioturbation, to contrast with downcore patterns that might be produced by human activity. Assuming stochastic burial and exhumation movements of shells between increments within the mixed layer and stochastic disintegration within increments, almost all combinations of net sedimentation, mixing, and disintegration produce a downcore increase in time averaging (interquartile range, IQR), typically associated with a decrease in kurtosis and skewness and with a shift from right-skewed to symmetrical age distributions. A downcore increase in time averaging is a null expectation wherever bioturbation generates an internally-structured mixed layer (i.e., a surface well-mixed layer is underlain by an incompletely-mixed layer), so that shells are mixed throughout the entire mixed layer at slower rate than they are buried below it by sedimentation. This downcore trend created by mixing is further amplified by the downcore decline in disintegration rate. Using data from the southern California shelf, we find that transition-rate matrices accurately reproduce the downcore changes in IQR, skewness, and kurtosis observed in sediment cores. The right-skewed distributions typical of surface death assemblages – the focus of most actualistic research – might be fossilized under exceptional conditions of episodic anoxia or sudden burial. However, such right-skewed assemblages will not typically transfer into subsurface historical layers and thus will be geologically transient. The deep-time fossil record will be dominated instead by more time-averaged assemblages with weakly skewed age distributions that form in the lower parts of the mixed layer.</p>
Data from: Beaver activity and red squirrel presence predict bird assemblages in boreal Canada
<p class="MsoNormal">Wetlands and predation in boreal ecosystems play essential roles throughout the breeding season for bird assemblages. We found a positive association of beaver activity and a negative influence of American red squirrels (<em>Tamiasciurus hudsonicus</em>) on bird assemblages. We used a multispecies hierarchical model to investigate whether bird communities differ between two major wetland habitats in boreal Canada: beaver ponds and peatland ponds. In addition to including variables such as forest cover and latitude, we adopted a structural equation model approach to estimate the occupancy of American red squirrels and its potential influence on bird communities. Using automated recording stations deployed at 50 ponds, we detected 96 bird species in 2018 and 2019. Bird species were grouped into four taxonomic guilds according to their habitat successional requirements: early successional species, late successional species, generalists, and wetland species. Beaver ponds harbored higher species richness, a pattern driven primarily by early successional species. The occupancy of almost a quarter of the species was lower in the presence of red squirrels. Late successional species responded positively to the cover of forest surrounding the pond. Our results highlight the value of considering acoustic data of red squirrels to quantify habitat quality in boreal forests. We conclude that beaver activity shapes bird assemblages through modification of their habitat, and that some bird guilds are associated negatively with the presence of American red squirrels.</p>
ScienceDex guides
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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.