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229 results for “latitudinal gradients”
Replication Data for: "Marine latitudinal diversity gradients are generally absent in intertidal ecosystems"
<p>Datasets used in the paper "Marine latitudinal diversity gradients are generally absent in intertidal ecosystems"</p>
Fig. 1. SEM photos showing c.f in Latitudinal Diversity Gradients in Free-living Microorganisms - Hoogenraadia a Key Genus in Testate Amoebae Biogeography
Fig. 1. SEM photos showing c.f. Hoogenraadia humicola found from soils in Shennongjia Mountains of central China (the left picture is from Qin et al. 2011). This was previously identified as Planhoogenraadia africana by Qin et al. (2011). Scale bars: 50 µm (a) and 20 µm (b).
Fig. 3 in Latitudinal Diversity Gradients in Free-living Microorganisms - Hoogenraadia a Key Genus in Testate Amoebae Biogeography
Fig. 3. Relationship between shell width and shell length of each species of the genus Hoogenraadia. The sample sizes on which these measurements are based is unclear as the older literature often doesn't specify the number of tests measured (see Table 1).
Fig. 2 in Latitudinal Diversity Gradients in Free-living Microorganisms - Hoogenraadia a Key Genus in Testate Amoebae Biogeography
Fig. 2. Shell outline and SEM photos of six species of genus Hoogenraadia Gauthier-Lièvre and Thomas 1958, with scale bar 50 μm. a – H. cryptostoma Gauthier-Lièvre and Thomas 1958; b – H. sylvatica Vucetich 1974; c – H. africana Gauthier-Lièvre and Thomas 1958; d – H. humicola Bonnet 1976; e – H. ovata Bonnet 1976; f – H. asiatica Wang and Min 1987.
Data from: Thermal plasticity in development and diapause strategy in a temperate butterfly across a latitudinal gradient
<ol> <li>Trade-offs among traits are central to life-history theory and often closely linked to an organism's fitness. Understanding how these trade-offs vary among populations and across environments is therefore important to more accurately predict species' responses to future climate change. However, the extent to which responses vary across populations remains unknown because few studies investigate intraspecific differences. </li> <li>We performed a full-factorial split-brood common garden experiment to test how variation in rearing temperature affects developmental timing and other traits important for survival during diapause in the Glanville fritillary butterfly (<em>Melitaea</em> <em>cinxia</em>). Pre-diapause larvae originating from four regions across a latitudinal cline across Europe were reared at four temperatures (25, 28, 31, and 34 °C), and we used a reaction norm approach to test for evidence of genetic differentiation and variation in developmental plasticity across regions.</li> <li>We found clear signs of genetic differentiation in multiple developmental traits, as well as differences in developmental plasticity. Northern larvae entered diapause in the fourth instar when the temperatures were low, whereas southern larvae did so in the fifth instar. As a result, development time is canalized with regards to temperature in northern larvae: due to entering diapause one stage earlier, they develop fast even in the cold, whereas southern larvae always develop slower, especially at low temperatures. As a trade-off, northern larvae have a lower body mass when reared at cooler temperatures compared to southern larvae, and they show increased plasticity in diapause mass. No clear clinal patterns were found in relative fat content.</li> <li>Our results show that trade-offs between body size, development time and growth rate can vary within species living across environmental clines, possibly as a consequence of natural selection to local environmental conditions or other genetic constraints. This variation highlights the importance of recognising the context-dependency of relationships between important life-history traits and their interactions with local environments in predicting species' responses to climate change.</li> </ol>
Variation in successional dynamics shape biodiversity patterns over a tropical-temperate latitudinal gradient
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Examining the diversity, stability and functioning of marine fish communities across a latitudinal gradient
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Patterns of functional diversity along latitudinal gradients of species richness in eleven fish families
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Data from: Marine animal diversity across latitudinal and temperature gradients during the Phanerozoic
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Latitudinal gradient, MEND experiment, and BioGen experiment relating species richness and net primary productivity (NPP)
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Activity of a freshwater turtle varies across a latitudinal gradient: implications for the success of assisted colonisation
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Investigating historical drivers of latitudinal gradients in polyploid plant biogeography: A multi-clade perspective
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Data from: Thermal plasticity in development and diapause strategy in a temperate butterfly across a latitudinal gradient
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The distribution of wild bee species along a Latitudinal gradient in northern Europe depends on their flower preferences
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Is there a latitudinal diversity gradient for symbiotic microbes? A case study with sensitive partridge peas
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Data for: Plasticity in mosquito size and thermal tolerance across a latitudinal climate gradient
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Exceptions to the rule: Relative roles of time, diversification rates and regional energy in shaping the inverse latitudinal diversity gradient
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Explaining global variation in the latitudinal diversity gradient: Meta-analysis confirms known patterns and uncovers new one
This dataset is also available on the Dryad Digital Repository (link: https://doi.org/10.5061/dryad.rg5rd). The code is also available on GitHub (link: https://github.com/nlkinlock/LDGmeta-analysis). This dataset was created to explore patterns in biodiversity across latitude. The pattern of increasing biological diversity from high latitudes to the equator [latitudinal diversity gradient (LDG)] has been recognized for greater than 200 years. Empirical studies have documented this pattern across many different organisms and locations. In order to quantify the evidence for the global LDG and the associated spatial, taxonomic and environmental factors, a systematic review, followed by a meta-analysis of the resulting dataset, were carried out. This dataset contains a large number of individual LDGs that have been published in the 14 years since Hillebrand's ground‐breaking meta‐analysis of the LDG.
Data from: The latitudinal diversity gradient of tetrapods across the Permo-Triassic mass extinction and recovery interval
<p>The decline in species richness from the equator to the poles is referred to as the latitudinal diversity gradient (LDG). Higher equatorial diversity has been recognised for over 200 years, but the consistency of this pattern in deep time remains uncertain. Examination of spatial biodiversity patterns in the past across different global climate regimes and continental configurations can reveal how LDGs have varied over Earth history and potentially differentiate between suggested causal mechanisms. The Late Permian–Middle Triassic represents an ideal time interval for study, because it is characterised by large-scale volcanic episodes, extreme greenhouse temperatures, and the most severe mass extinction event in Earth history. We examined terrestrial and marine tetrapod spatial biodiversity patterns using a database of global tetrapod occurrences. Terrestrial tetrapods exhibit a bimodal richness distribution throughout the Late Permian–Middle Triassic, with peaks in the northern low latitudes and southern mid latitudes around 20-40°N and 60°S, respectively. Marine reptile fossils are known almost exclusively from the Northern Hemisphere in the Early and Middle Triassic, with highest diversity around 20°N. Reconstructed terrestrial LDGs contrast strongly with the generally unimodal gradients of today, potentially reflecting high global temperatures and prevailing Pangaean super-monsoonal climate system during the Permo-Triassic.</p>
Community-level reorganizations following migratory pollinator dynamics along a latitudinal gradient
Predicting how communities re-arrange in response to changes in species composition remains a key challenge in ecology. Migratory species, which enter and leave communities across latitudinal gradients, offer us a unique opportunity to evaluate community and species-level responses to a shift in community composition. We focused on a migratory hummingbird and the communities that host it along a latitudinal and species diversity gradient. Our results show higher niche overlap in more diverse communities, allowing resident species to compensate for the loss of the migrant in providing pollination services. Contrastingly, in less diverse communities, the migrant behaves as a specialist, monopolizing abundant resources. In its absence, its role is not fully covered by resident species, resulting in a decrease in the fruit set of the migrant´s preferred plant species. These results help us understand the potential impacts of biodiversity loss and have important implications for community persistence given expected changes in the migratory behaviors of some species.
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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.