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81 results for “heterogeneous environment”
Gudgeon fish with and without genetically determined countershading coexist in heterogeneous littoral environments of an ancient lake
<p>Countershading, characterized by a darker dorsal surface and lighter ventral surface, is common among many animals. This dorsoventral pigment polarity is often thought to be adaptive coloration for camouflage. By contrast, non-countershaded (melanistic) morphs often occur within a species due to genetic color polymorphism in terrestrial animals. However, the polymorphism with either countershaded or melanistic morphs is poorly known in wild aquatic animals. This study explored the genetic nature of diverged color morphs of a lineage of gudgeon fish (genus <i>Sarcocheilichthys</i>) in the ancient Lake Biwa, and propose this system as a novel model for testing hypotheses of functional aspects of countershading and its loss in aquatic environments. This system harbors two color morphs that have been treated taxonomically as separate species; <i>S. variegatus microoculus</i> which occurs throughout the littoral zone, and <i>S. biwaensis</i> which occurs in and around rocky areas. First, we confirmed that the divergence of dorsoventral color patterns between the two morphs is under strict genetic control at the levels of chromatophore distribution and melanin-related gene expression under common garden rearing. The former morph displayed sharp countershading coloration, whereas the latter morph exhibited a strong tendency towards its loss. The crossing results indicated that this divergence was likely controlled by a single locus in a two-allele Mendelian-inheritance pattern. Furthermore, our population genomic and genome-wide association study analyses detected no genome-wide divergence between the two morphs, except for one region near a locus that may be associated with the color divergence. Thus, these morphs are either in a state of intraspecific color polymorphism or two incipient species. Evolutionary forces underlying this polymorphism appears to be associated with heterogeneous littoral environments in this lake. Future ecological genomic research will provide insight into adaptive functions of this widespread coloration, including the eco-evolutionary drivers of its loss, in the aquatic world.</p>
Unravelling the Molecular Structure and Confining Environment of an Organometallic Catalyst Heterogenized within Amorphous Porous Polymers
<p>Raw data corresponding to Figure 4c of the following publicaiton: </p> <div> <div> <div>Jabbour, R.; Ashling, C. W.; Robinson, T. C.; Khan, A. H.; Wisser, D.; Berruyer, P.; Ghosh, A. C.; Ranscht, A.; Keen, D. A.; Brunner, E.; Canivet, J.; Bennett, T. D.; Mellot-Draznieks, C.; Lesage, A.; Wisser, F. M. Unravelling the Molecular Structure and Confining Environment of an Organometallic Catalyst Heterogenized within Amorphous Porous Polymers. <em>Angewandte Chemie International Edition</em> <strong>2023</strong>, <em>62</em> (44), e202310878. <a href="https://doi.org/10.1002/anie.202310878">https://doi.org/10.1002/anie.202310878</a>.</div> </div> </div>
Data from: Genomic comparisons reveal biogeographic and anthropogenic impacts in the koala (Phascolarctos cinereus); a dietary-specialist species distributed across heterogeneous environments
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Modeling multipartite virus evolution: the genome formula facilitates rapid adaptation to heterogeneous environments
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A meta-analysis of effects of physiological integration in clonal plants under homogeneous vs. heterogeneous environments
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Data for variation of magnesium drives plant adaption to heterogeneous environments by regulating efficiency in photosynthesis on a large scale
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Data from: Limited influence of landscape on the genetic structure of three small mammals in a heterogeneous arid environment
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Genomic insights into adaptation to heterogeneous environments for the ancient relictual Circaeaster agrestis (Circaeasteraceae, Ranunculales)
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Data from: Genet dynamics of a regenerating dwarf bamboo population across heterogeneous light environments in a temperate forest understorey
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Data from: The evolutionary fate of heterogeneous gene duplications: a precarious overdominant equilibrium between environment, sublethality and complementation.
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Gudgeon fish with and without genetically determined countershading coexist in heterogeneous littoral environments of an ancient lake
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Data from: Modelling the dispersal of the two main hosts of the raccoon rabies variant in heterogeneous environments with landscape genetics
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Data from: The impact of selection, gene flow and demographic history on heterogeneous genomic divergence: threespine sticklebacks in divergent environments
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Data from: Landscape heterogeneity and local adaptation define the spatial genetic structure of Pacific salmon in a pristine environment
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Data from: Conspicuous signal evolution in heterogeneous environments
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A population-genomic approach for estimating selection on polygenic traits in heterogeneous environments
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Data from: Foraging actively can be advantageous in heterogeneous environments
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Data from: Adaptation to local climate in a multi-trait space: evidence from silver fir (Abies alba Mill.) populations across a heterogeneous environment
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Data from: Demographic history and genomic diversity and divergence in blue tit populations across heterogeneous environments
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Spatial and temporal variation in prey colour patterns for background-matching across a continuous heterogeneous environment
<p>In heterogeneous habitats, camouflage via background-matching can be challenging because visual characteristics can vary dramatically across small spatial scales. Additionally, temporal variation in signalling functions of colouration can affect crypsis, especially when animals use colouration seasonally for intraspecific signalling (e.g. mate selection). We currently have a poor understanding of how wild prey optimise background-matching within continuously heterogeneous habitats, and whether this is affected by requirements of intraspecific signalling across biological seasons. Here, we quantified colour patterns of a wild population of shore skink (<i>Oligosoma smithi</i>), a variably coloured lizard endemic to New Zealand, to 1) investigate whether background-matching varies across a vegetation gradient; 2) assess potential signalling functions of colour; and 3) to determine whether there is a trade-off between requirements for crypsis and intraspecific signalling in colouration across seasons. Although all pattern types occurred throughout the vegetation gradient, we found evidence for background-matching in skinks across the vegetation gradient, where dorsal brightness and pattern complexity corresponded with the proportion of vegetation cover. There was also a significant disparity between ventral colour (saturation) of juveniles and adults, and also between sexes, suggestive of sex recognition. However, there was little indication that colour was condition-dependent in adults. Despite some evidence for a potential role in signalling, crypsis did not greatly differ across seasons. Our study suggests that selection favours a mix of generalist and specialist background-matching strategies across continuously heterogeneous habitats.</p>
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.