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403 results for “Occurrence Data”
Asimina triloba georeferenced occurrence data and genetic data
<p><b>Aim</b>: Predictions of species' responses to accelerating global climate change require an understanding of historical range shifts. However, large-scale phylogeographic studies of Eastern North American understory plant taxa are relatively scarce. Here we employ ecological niche modelling and genetic analyses for inference of optimal pawpaw habitat in the past and future. </p> <p><b>Location</b>: Twenty-six states in the eastern United States</p> <p><b>Taxon</b>: <i>Asimina triloba </i>(L.) Dunal (Annonaceae)</p> <p><b>Methods</b>: The present-day niche of <i>Asimina triloba</i> was modelled in Maxent using seven bioclimatic variables, elevation, and location data from field samples and herbarium specimens. To model historically optimal habitats, the present-day model was projected onto rasters of seven bioclimatic variables and elevation representing the last glacial maximum (~22,000 years before present [YBP]) and the mid-Holocene (~6,000 YBP). Predicted habitat suitability for 2070 was also modelled. Additionally, 62 populations were genotyped with nine nuclear microsatellite loci and statistically analyzed. Levels and partitioning of genetic variation within and among populations were estimated within a geographic context.</p> <p><b>Results</b>: Models indicate that optimal habitat 22,000 YBP was severely restricted to now-submerged Gulf of Mexico and southeastern U.S. coastlines. By 2070 models suggest that optimal habitat will expand substantially northward relative to the present. Species-level genetic diversity (H<sub>E</sub> = 0.765) was high and genetic structure among populations was moderate (G<sub>ST</sub> = 0.202). S<span>tructure</span> indicates that there are two population clusters straddling the Appalachian Mountains.</p> <p><b>Main conclusions</b>: Models suggest that 22,000 YBP <i>A. triloba</i> was restricted to two major refugia in narrow bands of now-submerged habitat and one small inland refugium in southeastern Alabama and southwestern Georgia. Molecular data are consistent and suggest that the two eastern refugia expanded to give rise to the eastern cluster which is characterized by higher genetic diversity. The Texas/Louisiana refugium likely gave rise to populations in the western cluster, characterized by lower genetic diversity. </p>
Figure 2 from: Galván-Villa CM, Ríos-Jara E, Bastida-Izaguirre D, Hastings PA, Balart EF (2016) Annotated checklist of marine fishes from the Sanctuary of Bahía Chamela, Mexico with occurrence and biogeographic data. ZooKeys 554: 139-157. https://doi.org/10.3897/zookeys.554.6106
Figure 2 - Map showing the number of fish species recorded in Bahía Chamela and their biogeographic affinities.
Figure 1 from: Galván-Villa CM, Ríos-Jara E, Bastida-Izaguirre D, Hastings PA, Balart EF (2016) Annotated checklist of marine fishes from the Sanctuary of Bahía Chamela, Mexico with occurrence and biogeographic data. ZooKeys 554: 139-157. https://doi.org/10.3897/zookeys.554.6106
Figure 1 - Location of Bahía Chamela, Jalisco, Mexico. Black dots show the location of the sampling sites in the bay. The dotted line indicates the limits of the Marine Protected Area.
Figure 3 from: Galván-Villa CM, Ríos-Jara E, Bastida-Izaguirre D, Hastings PA, Balart EF (2016) Annotated checklist of marine fishes from the Sanctuary of Bahía Chamela, Mexico with occurrence and biogeographic data. ZooKeys 554: 139-157. https://doi.org/10.3897/zookeys.554.6106
Figure 3 - Ogilbia ventralis . LEMA-PE135, ♂, 56 mm SL, Pacific Mexico, Bahía Chamela. Scale 10 mm. Photo by CMGV.
Figure 5 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432
Figure 5 - Number of Portuguese (a) and Iberian (b) endemic plants per 10×10 km UTM square. The dataset used in the analysis corresponds to a total of 253,310 records. Note that low values do not necessarily mean absence of endemic species, as many areas are under-sampled (Figure 4a). Class breaks are manual. The dots are placed at the centre of WGS84 UTM squares. N.B. Iberian endemics (b) do not include Portuguese endemics.
Figure 1 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432
Figure 1 - Location of mainland Portugal (black) which, together with Spain (dark grey), forms the Iberian Peninsula. Dashed line represents the boundary of the Mediterranean macrobioclimate, which contacts with the temperate macrobioclimate to the north.
Figure 4 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432
Figure 4 - Number of occurrences (a) and species (b) recorded in Portugal mainland per 10×10 km square. The dataset used in this analysis includes a total of 253,310 records. Numbers were classified with geometrical intervals. The dots are placed at the centre of WGS84 UTM squares.
Figure 6 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432
Figure 6 - Barplot depicting the number of occurrence records observed per year. Occurrences observed before 1990 (127) were omitted for clarity. 7,681 records are not dated.
Figure 3 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432
Figure 3 - Tree map of the Flora-On dataset based on a two-level taxonomic classification. Families are delineated with thick lines and genera with thin lines. The size of the rectangles is proportional to the number of records held. The plot was built with the R package 'treemap' (Tennekes 2016).
Figure 2 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432
Figure 2 - Internal structure, data flow and front-end interfaces of Flora-On. Pink boxes represent the front-end interfaces that interact with the user (input and/or output). Green boxes represent the data, either permanent or temporary (dashed box). Blue boxes represent the internal server-side algorithms that parse the user queries, process and summarise the raw data, and deliver the results to the front-end interfaces.
Data for article entitled 'Anti-hiatus tendencies in Spanish: Rate of occurrence and phonetic identification'', published in Linguistics
<p>see the article</p>
Data from: Occurrence of spintronics behaviour (half-metallicity, spin gapless semiconductor and bipolar magnetic semiconductor) depending on the location of oxygen vacancies in BiFe 0.83 Ni 0.17 O 3
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Data from: The evolutionary enigma of mixed mating systems in plants: occurrence, theoretical explanations, and empirical evidence
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Data from: Are we underestimating the occurrence of sympatric populations?
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Data from: Phylogenomic analysis of transcriptome data elucidates co-occurrence of a paleopolyploid event and the origin of bimodal karyotypes in Agavoideae (Asparagaceae)
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Data from: Occurrence of canine parvovirus in dogs from Henan province of China in 2009–2014
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Data from: Bayesian estimation of speciation and extinction from incomplete fossil occurrence data
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Data from: Acceptance threshold theory can explain occurrence of homosexual behaviour
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Assigning occurrence data to cryptic taxa improves climatic niche assessments: biodecrypt, a new tool tested on European butterflies
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Data from: The relationship between native species richness and exotic species richness or occurrence will always be negative when the total number of species is accounted for in statistical models: A response to Beaury et al.
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