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159 results for “diversity determinants”
FIG UR E 3 (a) Dated phylogeny of the genus Theodoxus constructed in BEAST based on COI, 16S and ATPα. Node labels denote divergence times in millions of years ago (Ma); node bars indicate the 95% credibility interval around these dates. Small squares at nodes indicate significant support of divergence events found with BEAST and other phylogenetic analyses (see Figures S2.1 and S2.2), as explained through the key. Where MOTUs (A–R) show conspecifics among a number of morphospecies, species names are given in order of their year of description. Morphospecies, incorporated from GenBank, where determination was potentially dubious are highlighted by an asterisk. Clades (C) and subclades (SC) are demarcated by dashed lines between MOTUs. (b) LTT plots indicating the build‐up of lineages in Theodoxus over geological time. Dashed lines surrounding the solid LTT lines indicate the 95% confidence intervals. Where intra‐ and interspecific diversity diverge, interspecific diversity is highlighted in blue and intraspecific diversity in red. Transitions in geological ages are highlighted by narrow grey lines, while the grey bar marks the period of pronounced glacial cycles (last 900 kyr) [Colour figure can be viewed at wileyonlinelibrary.com] in Contributions of biogeographical functions to species accumulation may change over time in refugial regions
FIG UR E 3 (a) Dated phylogeny of the genus Theodoxus constructed in BEAST based on COI, 16S and ATPα. Node labels denote divergence times in millions of years ago (Ma); node bars indicate the 95% credibility interval around these dates. Small squares at nodes indicate significant support of divergence events found with BEAST and other phylogenetic analyses (see Figures S2.1 and S2.2), as explained through the key. Where MOTUs (A–R) show conspecifics among a number of morphospecies, species names are given in order of their year of description. Morphospecies, incorporated from GenBank, where determination was potentially dubious are highlighted by an asterisk. Clades (C) and subclades (SC) are demarcated by dashed lines between MOTUs. (b) LTT plots indicating the build‐up of lineages in Theodoxus over geological time. Dashed lines surrounding the solid LTT lines indicate the 95% confidence intervals. Where intra‐ and interspecific diversity diverge, interspecific diversity is highlighted in blue and intraspecific diversity in red. Transitions in geological ages are highlighted by narrow grey lines, while the grey bar marks the period of pronounced glacial cycles (last 900 kyr) [Colour figure can be viewed at wileyonlinelibrary.com]
Figure 1 in Genetic diversity of Atherina hepsetus (Osteichthyes: Atherinidae) populations as determined by RFLP analysis of three mtDNA regions
Figure 1. Sampling sites: Monastiraki (MON), Panagopoula (PAN), Kiparissi (KIP), Tinos (TIN), Naxos (NAX), Samos (SAM), Nissiros (NIS), Leipsi (LEI), Kos (KOS), Lesvos (MYT) and Evvoia (EVV).
Figure 3 in Genetic diversity of Atherina hepsetus (Osteichthyes: Atherinidae) populations as determined by RFLP analysis of three mtDNA regions
Figure 3. Dollo parsimony (Farris 1977) dendrogram showing the relationships between the 15 mtDNA haplotypes detected. Numbers indicate the bootstrap support (10,000 replicates) of each node of the majority-rule consensus tree.
Functional traits of both specific alien species and receptive community but not community diversity determined the invasion success under biotic and abiotic conditions
<p><span>Biodiversity can provide some resistance to alien species in some cases, but not in others. The observed paradoxical results may be related to several reasons, including variations in abiotic and/or biotic conditions, alien species characteristics, and the fact that the species number cannot adequately reflect native community diversity. A comprehensive study that incorporates these elements is lacking.</span></p> <p><span>We constructed invasion systems using nine alien plant species and 12 native communities, composed of two diversity levels (three vs. six species), under different nitrogen (N) and arbuscular mycorrhiza fungi (AMF) </span><span>inoculation</span><span> conditions. We used this fully crossed factorial experiment, i.e. N</span><span> (low vs. high) × native community diversity (three vs. six species) × AMF (with vs. without), to systematically explore the invasion success in native communities. </span></p> <p><span>We found that the species number of </span><span>native communities</span><span> didn't affect </span><span>invasion success under any of the N or AMF conditions. The effects of N enrichment and AMF inoculation on invasion were not consistent between alien species and native communities based on their phenotypic plasticity of functional traits in response to N enrichment and AMF inoculation. Specifically, the changing of invasion in response to N enrichment and AMF inoculation was associated with the plasticity of plant height and </span><span>root mass fraction</span><span> (RMF) that reflects the competitiveness for the acquisition of light and soil resources.</span></p> <p><span>Our results that species number did not capture well the resistance of the native community suggested that the </span><span>simple expression of species richness is not realistic to describe the invasion resistance of the community. Additionally, the association between functional traits of both alien species and native communities and </span><span>invasion success suggested that changes in competitive advantage and resource acquisition strategy are more important in explaining changes in invasive success in different N and AMF conditions.</span></p> <p><span>Future studies are needed to explore invasion success by systematically considering the characteristics of invasive species and the native community, and the specific abiotic and biotic conditions. Using functional traits may help advance our understanding of plant invasion in broad circumstances and shed light on a generalized framework of biological invasion.</span></p>
Data from: An exotic invader drives the evolution of plant traits that determine mycorrhizal fungal diversity in a native competitor.
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Data from: Ecological and historical determinants of population genetic structure and diversity in the Mediterranean shrub Rosmarinus officinalis (Lamiaceae)
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Data from: Genetic diversity, sexual condition, and microhabitat preference determine mating patterns in Sphagnum (Sphagnaceae) peat-mosses.
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Data from: Determinants of northerly range limits along the Himalayan bird diversity gradient
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Data from: Factors determining forest diversity and biomass on a tropical volcano, Mt. Rinjani, Lombok, Indonesia
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Global patterns and determinants of multiple facets of freshwater fishes beta diversity
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Data from: Drying determines the temporal dynamics of stream invertebrate structural and functional beta diversity
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Data from: Tropical tree species diversity in a mountain system in southern Mexico: local and regional patterns and determinant factors
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Data from: A metagenetics approach to determine the diversity and distribution of cyst nematodes at the level of the country, the field and the individual
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Data from: Species asynchrony and response diversity determine multifunctional stability of natural grasslands
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Data from: Lake size and fish diversity determine resource use and trophic position of a top predator in high-latitude lakes
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Data from: The geographical and environmental determinants of genetic diversity for four alpine conifers of the European Alps
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Functional traits of both specific alien species and receptive community but not community diversity determined the invasion success under biotic and abiotic conditions
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Data from: Functional traits determine why species belong to the dark diversity in a dry grassland fragmented landscape
<p><a name="_Hlk41300148"></a><a name="_Hlk41299586">A challenge for nature conservation is to know why many species are absent from suitable habitats and whether they might be able to disperse and to establish.</a> Here, we used 272 dry grassland patches within a fragmented landscape to investigate the role of local abiotic conditions and dispersal filtering in determining the likelihood of vascular plants to belong to the dark diversity (i.e. absent portion of the species pool). First, we quantified the species (SD), functional (FD) and phylogenetic (PD) diversity of both observed and dark communities. Second, we determined the roles of abiotic, present-day and historical landscape configuration variables in shaping their patterns. Third, we evaluated the importance of each variable in determining their species compositions. <a name="_Hlk30755847">Environmental filtering was assessed as effects of local abiotic conditions and dispersal filtering as the effects of present-day and historical landscape configuration. </a>Dispersal filtering was also estimated by comparing dispersal traits of observed and dark diversity. Finally, we assessed community completeness to determine how much of the species pool was realized within a local community. We found higher SD in the observed compared to the dark communities, but PD did not differ. Contrary to expectations, dark communities resembled higher FD compared to the observed communities. Species with low dispersal capacity, low competitive abilities and high stress-tolerance were more often absent. Observed and dark diversities were mostly affected by local abiotic variables. In the observed communities, present-day landscape configuration variables affected SD while historical landscape configuration variables explained FD and PD. In the dark communities, we found the opposite pattern. Completeness was affected by present-day and historical patch size. Our results explain why dry grassland species may belong to the dark diversity and highlight the importance of local abiotic and dispersal traits of the species to conserve dry grasslands in changing landscapes.</p>
Determinants of ecosystem stability in a diverse temperate forest
<p><span>Understanding how diversity affects ecosystem stability is crucial for predicting the consequences of continued habitat and biodiversity loss on ecosystem functions and services. Long-term productivity stability in plant communities is often associated with greater species, phylogenetic or functional diversity, more complex size and age structures, or higher asynchrony in species fluctuations (compensatory dynamics), all potentially increasing community resistance to perturbations. However, the relative importance of these stabilizing pathways is still poorly understood, especially in old-growth species-rich forests. Here we explore how compensatory dynamics and multiple facets of diversity underpin temporal stability of wood biomass production over forty years in a Japanese temperate forest, based on more than 45,500 stem increments from 15 species. Whereas the effect of species richness and phylogenetic diversity was small, the old-growth structural attributes markedly increased community stability via increased asynchrony in the performance of co-occurring species. Greater standing tree volume, stem density and interspecific variation in growth rates enhanced productivity stability both directly and indirectly via increased asynchrony. This corroborates the predictions of increased compensatory dynamics with increased asymmetric competition for light in a more productive environment. Asymmetric competition in old-growth patches, between dominant oaks and sub-canopy shade-tolerant firs and maples, is a major driver of productivity stability over time via compensatory dynamics. Overall productivity remains relatively constant in old-growth patches, as abundant firs and maples in the lower canopy layers compensate for biomass losses in canopy oaks caused by aging, wind and snow disturbances. Younger forest patches, composed of fast-growing, shade-intolerant species, had a lower stability of productivity, with reduced stem basal area and tree density due to higher understory bamboo coverage preventing tree regeneration and growth. We provide new insights into mechanisms underlying the stability of ecosystem functioning in diverse forest ecosystems, and emphasize the importance of preserving and supporting old-growth forests and their structural complexity.</span></p>
Systems genetics in diversity outbred mice inform BMD GWAS and identify determinants of bone strength
<p>This data repository contains data in support of "Systems genetics in diversity outbred mice inform BMD GWAS and identify determinants of bone strength".</p> <p>The following data are included:</p> <ul> <li>Raw genotyping results using the GigaMUGA array for 619 Diversity Outbred mice (.txt files).</li> <li>Genotype probabilities as an Rdata file, calculated using R/qtl2 (pr_basic_cleaned.Rdata).</li> <li>Allele probabilities as an Rdata file, calculated using R/qtl2 (apr_basic_cleaned.Rdata).</li> <li>R/qtl2 cross files for QTL (cross_basic_cleaned.Rdata) and eQTL (cross_eqtl_REDO.Rdata) mapping. Cross files also include covariates (including PEER factors in cross_eqtl_REDO.Rdata).</li> </ul> <p>Supporting sequencing data can be found from the NCBI Gene Expression Omnibus database (GSE152708, GSE152806).</p> <p>For more information, please visit (https://github.com/basel-maher/DO_project).</p> <p>Contact: bma8ne AT virginia DOT edu</p> <p> </p>
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Allen Brain Atlas
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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
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