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188 results for “Biogeographic distribution”
A biogeographical approach to characterising the climatic, physical and geomorphic niche of the most widely distributed mangrove species, Avicennia marina
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An interpolated biogeographic framework for tropical Africa using plant species distributions and the physical environment
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Data from: The biogeographical patterns of species richness and abundance distribution in stream diatoms are driven by climate and water chemistry
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Data from Jenkinson et al. 2020: Biogeographical variation in the distribution, abundance, and interactions among key species on rocky reefs of the northeast Pacific
<p>See Metadata tab for full description of transect survey data.</p>
Data from: The future distribution of the savannah biome: model-based and biogeographic contingency
The extent of the savanna biome is expected to be profoundly altered by climatic change and increasing atmospheric CO2 concentrations. Contrasting projections are given when using different modelling approaches to estimate future distributions. Furthermore, biogeographic variation within savannas in plant function and structure is expected to lead to divergent responses to global change. Hence the use of a single model with a single savanna tree type will likely lead to biased projections. Here we compare and contrast projections of South American, African, and Australian savanna distributions from a physiologically-based statistical distribution model - the Thornley transport resistance model (TTR-SDM) - and three versions of a dynamic vegetation model (DVM) designed and parameterized separately for specific continents. We show that attempting to extrapolate any continent-specific model globally biases projections. By 2070 all DVMs generally project a decrease in the extent of savannas at their boundary with forests, whereas the TTR-SDM projects a decrease in savannas at their boundary with aridlands and grasslands. This difference is driven by forest and woodland expansion in response to rising atmospheric CO2 concentrations in DVMs, unaccounted for by the TTR-SDM. We suggest that the most suitable models of the savanna biome for future development are individual-based dynamic vegetation models designed for specific biogeographic regions.
Data from: Genomic comparisons reveal biogeographic and anthropogenic impacts in the koala (Phascolarctos cinereus); a dietary-specialist species distributed across heterogeneous environments
The Australian koala is an iconic marsupial with specific dietary requirements distributed across heterogeneous environments, over a large geographic range. The distribution and genetic structure of koala populations has been heavily influenced by human actions, specifically habitat modification, hunting and translocation of koalas. There is currently limited information on population diversity and gene-flow at a species-wide scale, or with consideration to the potential impacts of local adaptation. Using species-wide sampling across heterogeneous environments, and high-density genome-wide markers (SNPs and PAVs), we show that most koala populations display levels of diversity comparable to other outbred species, except for those populations impacted by population reductions. Genetic clustering analysis and phylogenetic reconstruction reveals a lack of support for taxonomic classification of three koala sub-species, with only a single evolutionary significant unit supported. Furthermore, ~70% of genetic variance is accounted for at the individual level. The Sydney Basin region is highlighted as a unique reservoir of genetic diversity, having higher diversity levels (ie. Blue Mountains region; AvHecorr=0.20, PL%=68.6). Broad-scale population differentiation is primarily driven by an Isolation by Distance genetic structure model (49% of genetic variance), with clinal local adaptation corresponding to habitat bioregions. Signatures of selection were detected between bioregions, with no single region returning evidence of strong selection. The results of this study show that although the koala is widely considered to be a dietary-specialist species, this apparent specialisation has not limited the koala's ability to maintain gene-flow and adapt across divergent environments as long as the required food source is available.
FIGURE 1 in Redescription of Caprella dilatata Krøyer, 1843 (Caprellidae: Amphipoda: Crustacea) from Brazil, with note on its biogeographical distribution in South America
FIGURE 1. Caprella dilatata Krøyer, 1843. Locality, the Experimental Mussel Farming of Itajaí Valley University (UNIVALI), Itapocoroi Bay, Santa Catarina State, Brazil at 26°58'S 48°35'W. A, male, dorsal view; A', detail of tegument covered with ornamental sets; B, male, lateral view; C, female, lateral view; D, immature male, lateral view; D', poison tooth in the gnathopod 2 of a immature male. Scale bars: A,B,C,D: 1.0 mm; A', D': 0.1 mm.
FIGURE 4 in Redescription of Caprella dilatata Krøyer, 1843 (Caprellidae: Amphipoda: Crustacea) from Brazil, with note on its biogeographical distribution in South America
FIGURE 4. Caprella dilatata Krøyer, 1843 from the Experimental Mussel Farming of Itajaí Valley University (UNIVALI), Itapocoroi Bay, Santa Catarina State, Brazil at 26°58'S 48°35'W. A–D, male. A, pereopod 5; B, pereopod 6; C, pereopod 7; D, abdomen (ventral view); E, female abdomen (ventral view). Scale bars: A–C: 0.5 mm; D–E: 0.1 mm.
FIGURE 5 in Redescription of Caprella dilatata Krøyer, 1843 (Caprellidae: Amphipoda: Crustacea) from Brazil, with note on its biogeographical distribution in South America
FIGURE 5. Caprella dilatata Krøyer, 1843 (male). Illustrations from Krøyer (1843). 1. Lateral view. 2. Dorsal view, pereopods removed. 3. Flagellum of first antenna; a. last peduncular article; b. First article of the flagellum. 4. Mandible. 5. First maxilla. 6. Propodus of first pair of legs (= gnathopod 1). 7. Second pair of legs (= gnathopod 2). 8. Third pair of legs (= pereopods 5). 9. Abdomen.
FIGURE 3 in Redescription of Caprella dilatata Krøyer, 1843 (Caprellidae: Amphipoda: Crustacea) from Brazil, with note on its biogeographical distribution in South America
FIGURE 3. Caprella dilatata Krøyer, 1843. Locality, the Experimental Mussel Farming of Itajaí Valley University (UNIVALI), Itapocoroi Bay, Santa Catarina State, Brazil at 26°58'S 48°35'W. Male. A, maxilliped; A', detail of grasping margin of article 4 of maxilliped; B, upper lip; C, lower lip; D, maxilla 2; E, right mandible; F, maxilla 1; G, left mandible. Scale bars: 0.1 mm.
FIGURES 14a–14d, 15a–15b & 16 in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 14a–14d, 15a–15b & 16. Hermippus gavi sp. nov. 14a Female (holotype) habitus, dorsal view; 14b Female habitus, ventral view; 14c Female habitus, retrolateral view; 14d Female, frontal view. 15a Epigyne; 15b Internal duct system. 16 Posterior ventral spines.
FIGURES 17a–17b in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 17a–17b. Hermippus gavi sp. nov. Female copulatory organ. 17a Epigyne; 17b Internal duct system. CO = Copulatory opening; FD = Fertilization duct; MS = Median septum; PB = Posterior border line of the epigyne; SH = Spermathecal head. Scale bars: 17a, 0.16 mm; 17b, 0.15 mm.
FIGURES 18, 19 & 20. Hermippus spp., Female opisthosoma showing the characteristic dorsal pattern. 18 H in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 18, 19 & 20. Hermippus spp., Female opisthosoma showing the characteristic dorsal pattern. 18 H. globosus sp. nov. 19 H. inflexus sp. nov. 20 H. gavi sp. nov. Scale bars: 18, 0.47 mm; 19, 0.48 mm; 20, 0.53 mm.
FIGURES 13a–13c in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 13a–13c. Hermippus inflexus sp. nov. Female copulatory organ. 13a Epigyne; 13b Internal duct system; 13c Internal duct system, dorsal view. CD = Copulatory duct; FD = Fertilization duct; LL = Lateral lobe of the median septum; MS = Median septum; PB = Posterior border line of the epigyne; SH = Spermathecal head. Scale bars: 13a, 0.35 mm; 13b–13c, 0.13 mm.
FIGURES 10a–10d, 11a–11b & 12 in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 10a–10d, 11a–11b & 12. Hermippus inflexus sp. nov. 10a Female (paratype) habitus, dorsal view; 10b Female habitus, ventral view; 10c Female habitus, retrolateral view; 10d Female, frontal view. 11a Epigyne; 11b Internal duct system. 12 Posterior ventral spines.
FIGURES 9a–9c in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 9a–9c. Hermippus inflexus sp. nov. Left male palp. 9a prolateral view; 9b ventral view, 9c retrolateral view. C = Conductor; CDP = Dorsal process of conductor; E = Embolus; EB = Embolic base; lRTA2 = Left arm of the second retrolateral tibial apophysis; PC = Prolateral extension of conductor; rRTA2 = Right arm of the second retrolateral tibial apophysis; RTA1 = First retrolateral tibial apophysis; RTA2 = Second retrolateral tibial apophysis; tRTA1 = Transparent part of the first retrolateral tibial apophysis; TA = Tegular apophysis; W = Wing-like expansion of cymbium. Scale bars: 9a–9c, 0.33 mm.
FIGURES 5a–5d, 6a–6c, 7 & 8 in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 5a–5d, 6a–6c, 7 & 8. Hermippus inflexus sp. nov. 5a Male (holotype) habitus, dorsal view; 5b Male habitus, ventral view; 5c Male habitus, retrolateral view; 5d Male, frontal view. 6a Left male palp, prolateral view; 6b Left male palp, ventral view; 6c Left male palp, retrolateral view. 7 Left palpal tibia showing the dorsal 'scar'. 8 Posterior ventral spines.
FIGURES 1a–1d, 2a–2b & 3 in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 1a–1d, 2a–2b & 3. Hermippus globosus sp. nov. 1a Female (holotype) habitus, dorsal view; 1b Female habitus, ventral view; 1c Female habitus, prolateral view; 1d Female, frontal view. 2a Epigyne; 2b Internal duct system. 3 Posterior ventral spines.
FIGURES 4a–4b in On the genus Hermippus Simon, 1893 (Araneae: Zodariidae, Zodariinae) in India with the description of three new species from the Western Ghats and proposing a new biogeographical hypothesis for the distribution of the genus
FIGURES 4a–4b. Hermippus globosus sp. nov. Female copulatory organ. 4a Epigyne; 4b Internal duct system. CO = Copulatory opening; FD = Fertilization duct; MS = Median septum; PB = Posterior border line of the epigyne; SH = Spermathecal head. Scale bars: 4a, 0.13 mm; 4b, 0.15 mm.
Distribution. Java. Several biogeographic reviews failed to list the genus for Bali, an island directly east of Java with strong biogeographic affinities to the latter. A sighting was, however, reported from Bali Barat National Park, in a birdwatching trip report. Given the live-animal trade of this species on Java, further records are needed to confirm whether or not there is a native population of the genus on Bali. If there is, biogeographic considerations suggest it would be most closely related to the Javan population and quite probably conspecific. in Tragulidae
Distribution. Java. Several biogeographic reviews failed to list the genus for Bali, an island directly east of Java with strong biogeographic affinities to the latter. A sighting was, however, reported from Bali Barat National Park, in a birdwatching trip report. Given the live-animal trade of this species on Java, further records are needed to confirm whether or not there is a native population of the genus on Bali. If there is, biogeographic considerations suggest it would be most closely related to the Javan population and quite probably conspecific.
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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)
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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.