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333 results for “diversity gradient”
Figure 8 in Assessment of terrestrial snails' diversity and composition in six forests of west central - Morocco along an altitudinal gradient
Figure 8. Dendogram of Jaccard similarities among habitats (paired group), cophenetic correlation: 0.924 (For site abbreviations, see Table 1).
Figure 7 in Assessment of terrestrial snails' diversity and composition in six forests of west central - Morocco along an altitudinal gradient
Figure 7. Heterogeneity of the forest sites using Whittaker's index (For site abbreviations, see Table 1).
Figure 3 in Assessment of terrestrial snails' diversity and composition in six forests of west central - Morocco along an altitudinal gradient
Figure 3. Correlation analysis between environmental parameters measured at each station. Scale colors and corresponding written values in the plot indicate Pearson's coefficients (For details see text).
Figure 1 in Assessment of terrestrial snails' diversity and composition in six forests of west central - Morocco along an altitudinal gradient
Figure 1. Photographs of the forest sites (ED: Essaouira Dunes; TL: Tlat Lhanchane; Our: Ourika; Azg: Azgour; Tam: Tamadout; Ouk: Oukaimeden). The pictures have been photographed by Guennoun F.Z. (2021).
Fig. 3 in Amphibian diversity and conservation along an elevational gradient on Mount Emei, southwestern China
Fig. 3. Local and overall elevational ranges for each amphibian species. For each species, the local elevational range is the maximum minus minimum elevation on Mount Emei (gray box or vertical line), and the overall elevational range size is the published elevational range covering the whole distribution range (the horizontal line).
Fig. 2 in Amphibian diversity and conservation along an elevational gradient on Mount Emei, southwestern China
Fig. 2. The numbers of total and threatened species (bars) and elevational patterns of species richness (curves). Regression lines show total species richness (black) and threatened species richness (red) based on the polynomial regression models, with threatened status counts referring to the IUCN Red List (A) and the China Biodiversity Red List (B).
Fig. 1 in Amphibian diversity and conservation along an elevational gradient on Mount Emei, southwestern China
Fig. 1. (A) Geographic location of Mount Emei; (B) topographic overview of sample sites; and dominant vegetation types and typical habitats along the elevational gradient at (C) 500 m, (D) 1,300 m, and (E) 3,050 m. Sampling sites are indicated with red stars (see Appendix 1 for details).
Fig. 2 in Elucidating nematode diversity and prevalence in moose across a wide latitudinal gradient using DNA metabarcoding
Fig. 2. Nematode component community in winter with a) the number of nematode taxa detected at each study area and b) the number of nematode taxa shared among study areas.
Fig. 3 in Elucidating nematode diversity and prevalence in moose across a wide latitudinal gradient using DNA metabarcoding
Fig. 3. Prevalence in each study area of the six most common nematodes detected. Whiskers indicate 95% confidence intervals.
Fig. 1. A in Elucidating nematode diversity and prevalence in moose across a wide latitudinal gradient using DNA metabarcoding
Fig. 1. A map showing the distribution of the five study areas across Norway ranging from 59.6◦N to 70.5◦N.
Figure S2 in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure S2. MDS ordination indicating the clear separation of the two land use groups based on the urbanisation measures.
Figure 6. A in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure 6. A, Percentage distribution of alien and indigenous species per site; B, the indigenous (ISR) and alien (ASR) species richness per site; C, the percentage of the total average cover of all alien species per site; D, the associated adjusted Floristic Quality Assessment Index values (adjFQAI) of each site; arranged along a gradient of increasing percentage urban landcover.
Figure S1 in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure S1. Cluster analysis results based on the urbanisation measures indicating clear grouping between the urban sites 1 and 2 and the rural sites.
Figure 3. A in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure 3. A, Total number of species per wetland site (alpha diversity); B, the average species richness per transect for each site; C, the size of each wetland; arranged along a gradient of increasing percentage urban landcover.
Figure 4. A in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure 4. A, Beta diversity between sites (calculated as the average between all the rural sites (R1–R12), the average between the two urban sites and all the rural sites (U1 and U2), and between the two urban sites (U)); B, the SIMPER analysis results of the average similarity of the transects in each wetland site; arranged along a gradient of increasing percentage urban landcover.
Figure 5. A in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure 5. A, Wetland index values (WIV) of each site; B, the average site cover descriptions; C, the percentage average growth form distribution at each site; D, the average functional diversity per site (upland (U), facultative upland (FU), facultative (F), facultative wetland (FW), obligate wetland (OB)); arranged along a gradient of increasing urban landcover.
Figure 1 in Plant diversity and conservation value of wetlands along a rural-urban gradient
Figure 1. Study area indicating the urban area of Potchefstroom, its rural surroundings and the 14 wetland study sites. Inset map shows the size and location of the urban area and Mooi River within the former Tlokwe Municipal area.
Functional beta diversity of New Zealand fishes: characterising morphological turnover along depth and latitude gradients, with derivation of functional bioregions
<p>Changes in the functional structures of communities are rarely examined along multiple large-scale environmental gradients. Here, we describe patterns in functional beta diversity for New Zealand marine fishes <i>vs</i> depth and latitude, including broad-scale delineation of functional bioregions. We derived eight functional traits related to food acquisition and locomotion and calculated complementary indices of functional beta diversity for 144 species of marine ray-finned fishes occurring along large-scale depth (50 - 1200 m) and latitudinal gradients (29° - 51° S) in the New Zealand Exclusive Economic Zone. We focused on a suite of morphological traits calculated directly from <i>in situ</i> Baited Remote Underwater Stereo-Video (stereo-BRUV) footage and museum specimens. We found that functional changes were primarily structured by depth followed by latitude, and that latitudinal functional turnover decreased with increasing depth. Functional turnover among cells increased with increasing depth distance, but this relationship plateaued for greater depth distances (> 750 m). In contrast, functional turnover did not change significantly with increasing latitudinal distance at 700 - 1200 m depths. Shallow functional bioregions (50 - 100 m) were distinct at different latitudes, whereas deeper bioregions extended across broad latitudinal ranges. Fishes in shallow depths had a body shape conducive to efficient propulsion, while fishes in deeper depths were more elongated, enabling slow, energy-efficient locomotion, and had large eyes to enhance vision. Environmental filtering may be a primary driver of broad-scale patterns of functional beta diversity in the deep sea. Greater environmental homogeneity may lead to greater functional homogeneity across latitudinal gradients at deeper depths (700 - 1200 m). We suggest that communities living at depth may follow a 'functional village hypothesis', whereby similar key functional niches in fish communities may be maintained over large spatial scales.</p>
Changes in community-weighted trait mean, functional diversity, precipitation, temperature and surface area along an elevational gradient in Tenerife, Canary Islands
<p>This dataset comprises community-weighted trait means and functional diversity of leaf traits, precipitation, temperature and surface area of the elevational belt recorded in roadside (disturbed) and interior (less disturbed) plots, along an elevational gradient of 2,300 m in Tenerife, Canary Islands. The leaf traits measured were specific leaf area (SLA), nitrogen, carbon, phosphorous, nitrogen to carbon ratio, leaf dry matter content (LDMC), sodium, potassium and magnesium. The environmental variables measured are total precipitation of the growing season, mean temperature of the growing season and surface area of the elevation belt. This dataset has been used for the analysis presented in Ratier Backes et al. (in press). Mechanisms behind elevational plant species richness patterns revealed by a trait-based approach. <em>Journal of Vegetation Science</em>.</p>
Patterns of functional diversity along latitudinal gradients of species richness in eleven fish families
<p><strong>Aim</strong>: As we enter an era of major biodiversity shifts, understanding large-scale biodiversity patterns has become crucial for ecological and conservation purposes. Often, conservation priorities are based on concepts derived largely from species richness, yet recent works show that different facets of biodiversity are also critical for proper ecosystem continuity, function, and services. One facet of biodiversity increasingly relevant to conservation is functional diversity. Here, we aim to improve our understanding of large-scale patterns of biodiversity by testing the hypothesis that species richness can also accurately estimate functional diversity along the latitudinal gradient of species richness in fish.</p> <p><strong>Location</strong>: Marine Environments.</p> <p><strong>Time</strong> <strong>Period</strong>: Contemporary Major taxa studied: 842 species within eleven fish families; Acanthuridae, Blenniidae, Chaetodontidae, Gobiidae, Labridae, Lutjanidae, Pleuronectidae, Pomacanthidae, Pomacentridae, Scombridae, Sparidae.</p> <p><strong>Methods</strong>: Using geometric morphometrics to calculate morphological diversity, a proxy for functional diversity, we estimated expected functional diversity for a given number of species and compared it to the observed functional diversity in fish families along latitudes. We then fit a brokenstick regression model with estimates of functional diversity over absolute degree of latitudes to locate latitudes where significant shifts in functional diversity occur.</p> <p><strong>Results</strong>: We found that species richness typically over- or under-estimated functional diversity along the latitudinal gradient of species richness in the evaluated fishes. We also show that for most families investigated, there is a pattern of stable functional diversity from the equator through the tropics that shifts with a mean inflection point occurring at absolute latitude 31.7° ± 10.1°. We suggest this pattern may be linked to changes in environmental factors such as global temperature and/or habitat availability beyond tropical latitudes, however, these concepts require more study.</p> <p><strong>Main</strong> <strong>conclusion</strong>: This analysis shows the importance of further considering functional diversity in combination with other biodiversity metrics when developing conservation priorities and policies.</p>
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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.