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333 results for “diversity gradients”
Hierarchy of the factors influencing the broad-scale waterbirds functional diversity gradients in temperate China
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Data from: Diversity and composition of tropical butterflies along an Afromontane agricultural gradient in the Jimma Highlands, Ethiopia
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Data from: BIOVERA-Tree: tree diversity, community composition, forest structure and functional traits along gradients of forest-use intensity and elevation in Veracruz, Mexico
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Data from: Environmental filtering explains variation in plant diversity along resource gradients
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Functional diversity response to geographic and experimental precipitation gradients varies with plant community type
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How does variation in total and relative abundance contribute to gradients of species diversity?
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Species packing and the latitudinal gradient in local beta-diversity
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Data from: Using functional and phylogenetic diversity to infer avian community assembly along elevational gradients
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Data from: Breeding bird species diversity across gradients of land use from forest to agriculture in Europe
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Patterns and drivers of soil surface-dwelling Oribatida diversity along an altitudinal gradient on the Changbai Mountain, China
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Data from: Drivers of tropical rainforest composition and alpha diversity patterns over a 2,520 m altitudinal gradient
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Data from: Vertebrate community composition and diversity declines along a defaunation gradient radiating from rural villages in Gabon
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Species diversity of fungal endophytes across a stress gradient for plants
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Ancient tropical extinctions at high latitudes contributed to the latitudinal diversity gradient
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Voles mediate functional trait diversity along a resource gradient
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Figure 2 from: Heintz-Buschart A, Guerra C, Djukic I, Cesarz S, Chatzinotas A, Patoine G, Sikorski J, Buscot F, Küsel K, Wegner C-E, Eisenhauer N (2020) Microbial diversity-ecosystem function relationships across environmental gradients. Research Ideas and Outcomes 6: e52217. https://doi.org/10.3897/rio.6.e52217
Figure 2 Overview of the sample collection. Decomposition, as a central soil function, and the biodiversity of involved microbial communities will be studied in a large, international monitoring network (sampling locations indicated in a) to assess the generality of microbial biodiversity-function relationships across climates (mean annual air temperature and annual precipitation in b) and land use and cover types (c).
Figure 1 from: Heintz-Buschart A, Guerra C, Djukic I, Cesarz S, Chatzinotas A, Patoine G, Sikorski J, Buscot F, Küsel K, Wegner C-E, Eisenhauer N (2020) Microbial diversity-ecosystem function relationships across environmental gradients. Research Ideas and Outcomes 6: e52217. https://doi.org/10.3897/rio.6.e52217
Figure 1 A Environmental change and heterogeneity determine the biodiversity and the functioning of ecosystems (modified after Eisenhauer et al. 2016). In addition, changes in biodiversity can have significant effects on ecosystem functioning, which can be masked by strong environmental gradients. Only by accounting for environmental heterogeneity can the role of biodiversity for ecosystem functioning be wholly realized (Grace et al. 2016). B Hypothesized positive relationship between microbial diversity and decomposition (overall positive relationship with confidence intervals; no real data was used to create this figure). The diversity gradient in soil microbes is supposed to be caused by different environmental conditions. The different grey lines indicate BEF relationships across different experimental and environmental gradients.
Data from: Effects of forest-use intensity on vascular epiphyte diversity along an elevational gradient
Aim: Understanding patterns of tropical plant diversity and their vulnerability to anthropogenic disturbance at different spatial scales remains a great challenge in ecology and conservation. Here, we study how the effects of forest-use intensity on vascular epiphyte diversity vary along a tropical elevational gradient. Location: 3500-m elevational gradient along the eastern slopes of Cofre de Perote, Mexico. Methods: We studied the effects of forest-use intensity on alpha, beta, and gamma diversity of vascular epiphyte assemblages in old-growth, degraded, and secondary forests at eight study sites at 500 m intervals along the elevational gradient. At each elevation and in each of the three forest-use intensity levels, we established five 400 m² plots yielding a total of 120 plots. Results: Interactive effects of elevation and forest-use intensity strongly impacted local-scale patterns of vascular epiphyte diversity. We found a bimodal trend, with species diversity peaking at 500 and 1500 m above sea-level, which deviates from the previously reported humped-shaped pattern. In most cases alpha diversity did not differ significantly among forest-use intensity levels. However, gamma diversity was always lower in secondary forests compared to old-growth forests across the entire elevational gradient. Within each elevational belt, beta diversity was dominated by species turnover along the forest-use intensity gradient in the lowlands and declined with increasing elevation, where community composition became increasingly nested. Along the elevational gradient, the spatial turnover of vascular epiphyte community composition was similar among forest-use intensity levels. Main conclusions: Our results reveal a strong interaction between forest-use intensity and elevation, making it difficult to extrapolate findings from one elevational belt to another. Our findings highlight the value of old-growth forest for epiphyte diversity, but also show that degraded and secondary forests –depending on the elevational belt– may maintain a high species diversity, and thus play an important role in conservation planning.
Diversity and distribution across a large environmental and spatial gradient: evaluating the taxonomic and functional turnover, transitions and environmental drivers of benthic diatom communities
<p><b><span>Aim:</span></b> Global biodiversity loss has raised interest in understanding variation in diversity at different scales. Especially studies conducted across large spatial gradients are crucial, because they can increase perspectives on how ecological patterns change relative to environmental factors, and facilitate predictions of possible responses to environmental change. We explored the full extent of a brackish sea to test the hypotheses that (i) benthic communities are defined by species' limited ranges, controlled by varying drivers along a large environmental gradient, (ii) the responses of taxonomic and functional community composition and turnover to the environmental gradient are different, thus highlighting the need to include both measures in ecological studies, and (iii) diversity reaches the minimum at intermediate salinities (Remane curve) due to the low adaptation of freshwater and marine species.</p> <p><b>Location</b>: A large environmental and spatial gradient spanning the entire Swedish coastline (ca. 2300 km; salinity 1.2-27.6), the Baltic Sea</p> <p><b><span>Time period</span></b><span>: August 2018</span></p> <p><b><span>Major taxa studied:</span></b><span> Benthic diatoms</span></p> <p><b><span>Methods</span></b><span>: </span>We assessed environmental drivers for the communities and calculated the taxonomic and functional alpha and beta diversity along the gradient. We also compared the taxonomic and functional composition and diversity of communities between areas with different salinity.</p> <p><b><span>Results</span></b><span>:</span> We found support for the hypothesis of limited species ranges, as taxonomic beta diversity, mainly induced by changes in salinity and climate, was high, whereas functional beta diversity remained considerably lower, and the composition and diversity of communities, as well as environmental drivers controlling the communities, differed between regions with different salinity. The lowest taxonomic diversity was found at intermediate salinities of 5-6.</p> <p><b><span>Main conclusions:</span></b> These findings advance understanding of large-scale patterns of benthic diversity, emphasize the importance of large gradient studies for a better understanding of general ecological patterns, and highlight the vulnerability of brackish water ecosystems as ecologically important tipping point realms.</p>
Data from: Genetic diversity and population structure in contemporary house sparrow populations along an urbanization gradient.
House sparrow (Passer domesticus) populations have suffered major declines in urban as well as rural areas, while remaining relatively stable in suburban ones. Yet, to date no exhaustive attempt has been made to examine how, and to what extent, spatial variation in population demography is reflected in genetic population structuring along contemporary urbanization gradients. Here we use putatively neutral microsatellite loci to study if and how genetic variation can be partitioned in a hierarchical way among different urbanization classes. Principal coordinate analyses did not support the hypothesis that urban/suburban and rural populations comprise two distinct genetic clusters. Comparison of FST values at different hierarchical scales revealed drift as an important force of population differentiation. Redundancy analyses revealed that genetic structure was strongly affected by both spatial variation and level of urbanization. The results shown here can be used as baseline information for future genetic monitoring programmes and provide additional insights into contemporary house sparrow dynamics along urbanization gradients.
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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.