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49 results for “marginal habitats”
R replication code and data for: Do modern hunter-gatherers live in marginal habitats?
<p>Data and R replication code for testing the Marginal Habitat Hypothesis. The R code files contain all models and are organized by the figures they generate for the associated paper.</p> <p>The data are sourced from:</p> <p>1) the Standard Cross Cultural Sample (SCCS).</p> <p>2) NASA Moderate Resolution Imaging Spectroradiometer (MODIS) NPP data (MOD17A3 algorithm) from Numerical Terra Dynamic Simulation Group at the University of Montana.</p> <p>3) Marine Ecoregions Of the World (MEOW): <a href="http://maps.tnc.org/files/metadata/MEOW.xml">http://maps.tnc.org/files/metadata/MEOW.xml</a></p> <p>4) Terrestrial Ecoregions Of the World (TEOW): <a href="http://maps.tnc.org/files/metadata/TerrEcos.xml">http://maps.tnc.org/files/metadata/TerrEcos.xml</a></p>
Fig. 1. Sampling sites along the Costa Rica margin and exemplary habitat pictures. A in Cutting the ribbon: bathyal Nemertea from seeps along the Costa Rica margin, with descriptions of 2 new genera and 9 new species
Fig. 1. Sampling sites along the Costa Rica margin and exemplary habitat pictures. A. Map of the seven sampling sites along the Costa Rica margin: Cocos Canyon (CC), Jaco Scar (JS), Mound 11 (M11), Mound 12 (M12), Mound Jaguar (MJ), Parrita Seep (PS), and Quepos Plateau (QP). B. Aggregation of the vestamentiferan Escarpia spicata Jones, 1985. C. Nemerteans of the species Chernyshevia escarpiaphila sp. nov. (arrows) found on Escarpia spicata. Photo credit: ROV SuBastian/Schmidt Ocean Institute.
Fig. 7 in Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)
Fig. 7. Radula of Anatoma declivis sp. nov., South-East Indian Ridge, INDEX19_127RO, (I19_Ma_78).
Data from: Data for habitat quality or quantity? Niche marginality across 21 plants and animals suggests differential responses between highland and lowland species to past climatic changes
<p>Climatic changes can affect species distributions, population abundance, and evolution. Such organismal responses could be determined by the amount and quality of available habitats, which can vary independently. In this study, we assessed changes in habitat quantity and quality independently to generate explicit predictions of the species' responses to climatic changes between Last Glacial Maximum (LGM) and present day. We built ecological niche models and distribution models for 21 reptile, mammal, and plant taxa from the Baja California peninsula inhabiting lowland or highland environments. Geological data suggests the CCSM global circulation model is a better representation of LGM climate for the Baja California peninsula. Significant niche divergence was detected for all clades within species, along with significant differences in the niche breadth and area of distribution between northern and southern clades. Most clades showed a reduction in distribution area towards LGM. Further, niche marginality (used as a measure of habitat quality) was higher during LGM for most clades, except for northern highland species. Our results suggest that changes in habitat quantity and quality can affect organismal response independently. This allows the prediction of genomic signatures associated with changes in effective population size and selection pressure that could be explicitly tested to support our models.</p>
Field margins as substitute habitat for the conservation of birds in agricultural wetlands; Supplementary information
<p>Supplementary material, dataset and script links to the research paper submit for recommendation by PCI Ecology.</p>
Data from: Data for habitat quality or quantity? Niche marginality across 21 plants and animals suggests differential responses between highland and lowland species to past climatic changes
Open the record for dataset details and reuse information.
Data from: Landscape resistance and habitat combine to provide an optimal model of genetic structure and connectivity at the range margin of a small mammal
We evaluated the effect of habitat and landscape characteristics on the population genetic structure of the white-footed mouse. We develop a new approach that uses numerical optimization to define a model that combines site differences and landscape resistance to explain the genetic differentiation between mouse populations inhabiting forest patches in southern Québec. We used ecological distance computed from resistance surfaces with Circuitscape to infer the effect of the landscape matrix on gene flow. We calculated site differences using a site index of habitat characteristics. A model that combined site differences and resistance distances explained a high proportion of the variance in genetic differentiation and outperformed models that used geographical distance alone. Urban and agriculture related land uses were, respectively, the most and the least resistant landscape features influencing gene flow. Our method detected the effect of rivers and highways as highly resistant linear barriers. The density of grass and shrubs on the ground best explained the variation in the site index of habitat characteristics. Our model indicates that movement of white-footed mouse in this region is constrained along routes of low resistance. Our approach can generate models that may improve predictions of future northward range expansion of this small mammal.
FIGURE 13 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 13. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co..Virginia. Paratype female (8.0 mm): (a, b, c, d, e), pereopods 3, 4 (in part), 5, 6, 7 (in part). Note: pereopods 6 and 7 subequal except coxal plates differ as shown. Coxal gills shown on pereopods 3 and 4. All pereopods and basic gnathopods to same scale.
FIGURE 8 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 8. Stygobromus paxillus, sp. n. Prettyboy Dam West Spring, Baltimore Co., Maryland. Paratype female (3.0–3.5 mm): (a, b), antennae 1, 2 (accessory flagellum of antennae 1 enlarged); (c) right mandible (spine row, lacinia mobilis and incisor enlarged); (d) left mandible; (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped.All mouthparts drawn to same scale; antennae to smaller scale.
FIGURE 9 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 9. Stygobromus paxillus, sp. n. Pretty Boy Dam West Spring, Baltimore Co., Maryland.Paratype female (3.0–3.5 mm): (a) gnathopod 1 (palmar spine enlarged); (b) gnathopod 2 (palm and palmar spines enlarged in part). Gnathopods drawn to same scale.
FIGURE 5 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 5. Stygobromus felleri, sp. n. Funks Pond Spring, Cecil County, Maryland. Paratype male (4.0–4.5 mm): (a, b) antenna 1, antenna 2 (accessory flagellum and aesthetacs of antenna 1 enlarged); (c) left mandible (inner face enlarged); (d) right mandible in part (inner face enlarged); (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped. Antennae drawn to same scale; maxillae 1 & 2 to same scale; maxilliped and lower lip to smaller scale.
FIGURE 4 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 4. Stygobromus caecilius, sp. n. Belvedere Seepage Woods, Cecil County, Maryland. Holotype specimen (2.0–2.5 mm): (a, b, c, d, e) pereopods 3, 4, 5, 6, 7; (f) bifurcate lateral sternal gill (process); (g) pleonal plates 1, 2, 3; (h) pleopod; (i, j, k.) uropods 1, 2, 3; (l) telson. Pereopods, pleonal plates and bifurcate lateral gill drawn to same scale; all other structures (uropods, pleopod & telson) to larger scale.
FIGURE 1 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 1. Distribution of four new species of Stygobromus from the Coastal Plain and eastern Piedmont in Maryland and Virginia, United States. The restricted distributions of S. caecilius, S. felleri and S. paxillus. are indicated by single symbols. Stygobromus foliatus is more widely distributed and recorded from multiple locations on opposite sides of the Potomac River in Charles and S. Mary's counties in Maryland, and Caroline, Westmoreland and King & Queen counties in Virginia. Several closely spaced localities in Caroline County are indicated by a single symbol. The curved line through MD and VA marks the approximate boundary between the Coastal Plain to the east and the Piedmont to the west.
FIGURE 7 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 7. Stygobromus felleri, sp. n. Funks Pond Spring, Cecil County, Maryland. Paratype male (4.0–4.5 mm): (a, b, c, d, e) pereopods 3, 4, 5, 6, 7; (f) lateral sternal gill from pereopod 7; (g) lateral sternal gill from pereopod 6; (h) pleonal plates; (i) pleopod; (j, k, l) uropods 1, 2, 3; (m) telson. Antennae, pereopods 3, 4, 5, 6, 7 and pleonal plates drawn to same scale; gnathopods 1 & 2, pleopod, uropods and telson to larger scale.Maxillae 1 & 2 drawn to larger scale than other mouthparts. Inner faces of molars and palms of gnathopods greatly enlarged.
FIGURE 12 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 12. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co..Virginia. Paratype female (8.0 mm): (a) gnathopod 1 (palmar region and rastellate setae greatly enlarged; (b) gnathopod 2 (propodus and rastellate setae greatly enlarged). Basic gnathopods drawn to same scale. Enlargements: gnathopod 1 (4X); gnathopod 2 (2X).
FIGURE 11 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 11. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co., Virginia. Paratype female (8.0 mm): (a, b) antennae 1, 2 (aesthetacs on antenna 2 enlarged as indicated); (c) right mandible in part (palp not drawn, similar to left mandible); (d), left mandible; (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped. All mouthparts drawn to same scale; antennae to smaller scale.
FIGURE 10 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 10. Stygobromus paxillus, sp. n. Pretty Boy Dam West Spring, Baltimore Co., Maryland.Paratype female (3.0–3.5 mm): (a, b, c, d, e) pereopods 3, 4, 5, 6, 7; (f) median sternal gills (processes); (g) pleonal plate; (h, i, j) uropods 1, 2, 3; (k) telson. All pereopods, pleonal plate, uropods 1 & 2 drawn to same scale; uropod 3 and telson to larger scale.
FIGURE 3 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 3. Stygobromus caecilius, sp. n. Belvedere Seepage Woods, Cecil County, Maryland. Holotype specimen (2.0–2.5 mm: (a) gnathopod 1; (b) gnathopod 2.
FIGURE 2 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 2. Stygobromus caecilius, sp. n. Belvedere Seepage Woods, Cecil County, Maryland. Holotype specimen (2.0–2.5 mm): (a, b) antenna 1, antenna 2; (c) right mandible; (d) left mandible; (e) lower lip; (f) maxilla 1; (g) maxilliped; (h). Antennae drawn to same scale; other mouthparts to larger scale. Inner face of mandibles enlarged as indicated.
FIGURE 14 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 14. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co..Virginia. Paratype female (8.0 mm): (a) leaf-like sternal gills (processes); (b) brood plate; (c) pleonal plates (left to right) 1, 2, 3; (d) uropod 1; (e) uropod 2; (f) uropod 3; (g) telson. Brood plates, sternal gills, uropods 1 and 2 drawn to same scale; uropod 3 and telson to larger scale. Pleonal plates greatly reduced and drawn to much smaller scale than other structures.
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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.