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976 results for “Pacific Islands”
The role of island physiography and oceanographic factors in shaping species richness and turnover of nesting seabird assemblages on islands across the southeastern Pacific
<p>For seabirds, food supplies and nest sites are largely driven by oceanographic gradients and island habitats, respectively. Research into seabirds' ecological roles in insular ecosystems is crucial to understanding processes that structure seabird nesting assemblages. We examined the influence of island physiography and oceanographic factors on the spatial variation in α and β-diversity of nesting seabird assemblages.<br> <br> <strong>Location</strong><br> Southeastern Pacific Ocean.<br> <br> <strong>Taxon</strong><br> Birds<br> <br> <strong>Methods</strong><br> We compiled data from 53 seabirds breeding on 41 coastal and oceanic islands using different sources: our field records, online databases, environmental reports, and literature. We used generalized linear models (GLM) to describe the effect of island physiography (area, elevation, and isolation) and oceanographic factors (surface temperature, salinity, and primary productivity) on seabird species richness (α-diversity). We applied multivariate GLM to test the effects of physiographic and oceanographic predictors on species composition (β-diversity). We used Jaccard dissimilarities on species occurrences per island to calculate β-diversity partitioned into turnover and nestedness. Polynomial models allowed us to model these metrics against geographical and environmental gradients and so analyze patterns in seabird β-diversity across spatial scales.<br> <br> <strong>Results </strong><br> Species richness was highest in Galápagos, Pitcairn, and Rapa Nui. Changes in seabird α-diversity across islands were determined by island area and distance to South America but not by oceanographic variables. Physiographic and oceanographic factors were significant in determining β-diversity. Changes in β-diversity were mostly due to species replacement (β-turnover) across three major island Systems (Galápagos Archipelago, Chilean coastal islands, and oceanic islands of the southeastern Pacific). The contribution of β-nestedness was restricted to small scales (within archipelagos).<br> <br> <strong>Main conclusions</strong><br> Physiographic and oceanographic factors explain species diversity of seabird assemblages on islands of the southeastern Pacific. Oceanographic variables did not affect species richness but significantly influenced species composition. Change in species composition reflects gradients across three marine biogeographical realms: Temperate South, Eastern Indo-Pacific, and Tropical Eastern Pacific. The low degree of species nestedness may reflect multiple evolutionary origins.</p>
Total Particulate Carbon and Nitrogen Concentration from R/V Melville MV1015 in the S. Pacific from Arica, Chile to Easter Island, 2010 (C-MORE project)
<p>"The South East Pacific (SEP) is characterized by very high nutrient concentrations in the waters adjacent to the Chilean coast, but very low nutrient concentrations (oligotrophic) in the mid- South Pacific Subtropical Gyre (SPSG), near Easter Island. The steep gradient in nutrient concentrations across the region affects the level of marine production, the composition of the microbial community, and the operation of major biogeochemical cycles in ways that are not fully understood. Despite the remarkable diversity of trophic conditions, strong gradients and even some unique singularities, the SEP is still the most sparsely sampled oceanic region of the global ocean from hydrodynamic, biological and biogeochemical points of view. The SPSG is also the most oligotrophic of all sub-tropical gyres. Previous expeditions and remote sensing studies have described the nutrient and chlorophyll field, but there have been few simultaneous measurements of chemical properties with microbial community structure and function. This expedition is designed to investigate the impact of elemental nutrient (nitrogen, phosphorus, iron, silicon, carbon) ratios on marine productivity and microbial community composition. Samples for PC (particulate carbon) and PN (particulate nitrogen) were collected on a combusted 25mm glass fiber filter (GF/F) and stored in a -80 freezer until analysis. Samples were further analyzed using a Carlo Erba NA 1500 Elemental Analyzer." Time is in GMT. Note: it is questionable if the 500m sample collected on 2010-11-27 was really taken at 500m (see comment on data sheet). This “best guess” for depth was included in the data for CMAP visualization purposes.</p> <p>This description has been reproduced using the following source:<br> <br> http://dmoserv3.bco-dmo.org/jg/info/BCO-DMO/CMORE/bigrapa/PCPN%7Bdir=dmoserv3.bco-dmo.org:80/jg/dir,data=dmoserv3.bco-dmo.org:80/jg/serv/BCO-DMO/CMORE/bigrapa/PCPN.html1%7D?</p>
BiG RAPA Water Column HPLC Pigments from R/V Melville MV1015 in the South Pacific from Arica, Chile to Easter Island from November to December 2010 (C-MORE project)
<p>“The South East Pacific (SEP) is characterized by very high nutrient concentrations in the waters adjacent to the Chilean coast, but very low nutrient concentrations (oligotrophic) in the mid- South Pacific Subtropical Gyre (SPSG), near Easter Island. The steep gradient in nutrient concentrations across the region affects the level of marine production, the composition of the microbial community, and the operation of major biogeochemical cycles in ways that are not fully understood. Despite the remarkable diversity of trophic conditions, strong gradients and even some unique singularities, the SEP is still the most sparsely sampled oceanic region of the global ocean from hydrodynamic, biological and biogeochemical points of view. The SPSG is also the most oligotrophic of all sub-tropical gyres. Previous expeditions and remote sensing studies have describes the nutrient and chlorophyll field, but there have been few simultaneous measurements of chemical properties with microbial community structure and function. This expedition is designed to investigate the impact of elemental nutrient (nitrogen, phosphorus, iron, silicon, carbon) ratios on marine productivity and microbial community composition.” This BiG RAPA dataset contains water column HPLC pigment data from samples collected via Niskin bottles attached to a CTD. Time is in GMT.</p> <p><br> This description has been reproduced using the following source:</p> <p><br> http://dmoserv3.bco-dmo.org/jg/info/BCO-DMO/CMORE/bigrapa/pigments_watcol%7Bdir=dmoserv3.bco-dmo.org:80/jg/dir,data=dmoserv3.bco-dmo.org:80/jg/serv/BCO-DMO/CMORE/bigrapa/pigments_watcol.html1%7D?</p>
Nutrients from R/V Melville MV1015 in the South Pacific from Arica, Chile to Easter Island from November to December 2010 (C-MORE project)
<p>"A 5-channel, continuous flow analyzer was used for dissolved nutrient determinations on the BIG RAPA cruise. Alpkem and Technicon AutoAnalyzer II™ components were used to measure phosphate, ammonium, nitrite, silicic acid and nitrate plus nitrite (N+N). A Keithley model 575 data acquisition system backed by analog strip chart recorders was used to acquire the data. Absorbance data was converted to concentrations using the OSU program NUTCALC." Time is in GMT. More detailed information is available at: http://dmoserv3.bco-dmo.org/jg/info/BCO-DMO/CMORE/bigrapa/nutrients%7Bdir=dmoserv3.bco-dmo.org:80/jg/dir,data=dmoserv3.bco-dmo.org:80/jg/serv/BCO-DMO/CMORE/bigrapa/nutrients.html1%7D?</p>
Fig. 1 in Habitat use and behaviour of the Irrawaddy dolphin, Orcaella brevirostris and the Indo-Pacific finless porpoise, Neophocaena phocaenoides off the west coast of Penang Island, Malaysia
Fig. 1. Map of Penang Island in Southeast Asia.
Microbial composition and diversity across invasive and native spiders in the pacific islands
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Species Abundance Distributions (SADs) for local tree communities in 1-ha forest plots on 20 tropical islands in the Indo-Pacific region
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Community composition and photosynthetic physiology of phytoplankton in the western subarctic Pacific near the Kuril Islands with special reference to iron availability
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The role of island physiography and oceanographic factors in shaping species richness and turnover of nesting seabird assemblages on islands across the southeastern Pacific
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FIGURE 3 in A new species of the genus Rhachotropis from off Amamioshima Island northwestern Pacific (Crustacea: Amphipoda: Eusiridae)
FIGURE 3. Rhachotropis reiwa sp. nov., holotype, male. A, maxilla 1, anterior view; B, maxilla 2, anterior view; C, maxilliped, anterior view; D, gnathopod 1, medial view; E, seta on palmar margin of gnathopod 1, medial view; F, robust setae on proximal part of palmar margin of gnathopod 1, medial view; G, gnathopod 2, medial view; H, robust setae on proximal part of palmar margin of gnathopod 2, medial view.
FIGURE 1 in Larval development and osteology of Callanthias platei (Teleostei: Callanthiidae) from Desventuradas Islands, South Pacific
FIGURE 1. Larval development of Callanthias platei, lateral view. A. Preflexion larva, 3 mm SL (MNHNCL ICT 7605). B. Flexion larva, 4.48 mm SL (MNHNCL ICT 7606). C. Postflexion larva, 6.09 mm SL (MNHNCL ICT 7603).
FIGURE 3 in Larval development and osteology of Callanthias platei (Teleostei: Callanthiidae) from Desventuradas Islands, South Pacific
FIGURE 3. Osteological development of vertebral column, dorsal, anal and pelvic fins of Callanthias platei, lateral view. Red/pink structures, bone; blue structures, cartilage. A. 3 mm SL. B. 4.48 mm SL. C. 5.31 mm SL. D. 6.09 mm SL. adr: anal distal radial; apr: anal proximal radial; ap: anal pterygiophore; as: anal spine; asr: anal soft ray; ddr: dorsal distal radial; dmr: dorsal middle radial; dp: dorsal pterygiophore; dpr: dorsal proximal radial; ds: dorsal spine; dsr: dorsal soft ray; ha: haemal arch; hs: haemal spine; na: neural arch ns: neural spine; p: pelvis; pr: pelvic ray; ps: pelvic spine; snc: supraneural cartilages; v: vertebra.
FIGURE 8 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 8. Distribution of the newly recorded sponges. A, Andaman and Nicobar Islands. B, Indo-Pacific.
FIGURE 6 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 6. Clathrina clara Klautau & Valentine, 2003 (ZSI/ANRC–20973): A, preserved specimen, B, microscopic view of a fragment of cormus. C, giant triactine. D, smaller triactine.
FIGURE 3 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 3. Axinella donnani (Bowebank, 1873) (ZSI/ANRC–19281): A, in situ photograph. B, preserved specimen. C, tangential view of skeleton. D, oxea and style.
FIGURE 2. Agelas ceylonica sensu Thomas, 1981 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 2. Agelas ceylonica sensu Thomas, 1981 (ZSI/ANRC–20437): A, in situ photograph. B, preserved specimen. C, tangential view of the skeleton showing spongin and acanthostyles. D, acanthostyles. E, styles with plain whorls. F, smooth style.
FIGURE 7. Plakortis bergquistae Muricy, 2011 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 7. Plakortis bergquistae Muricy, 2011 (ZSI/ANRC–20445): A, in situ photograph, B, preserved specimen. C, tangential view of ectosome and choanosome. D, cross sectional view of choanosome. E, F, diods of different sizes. G, triod.
FIGURE 4 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 4. Dragmacidon australe (Bergquist, 1970) (ZSI/ANRC–19927): A, in situ photograph. B, preserved specimen. C, tangential view of the skeleton. D, styles and oxeas.
FIGURE 5 in New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India
FIGURE 5. Siphonodictyon maldiviense (Calcinai, Cerrano, Sarà & Bavestrello, 2000) (ZSI/ANRC–20961): A, in situ photograph. B, preserved specimen. C, tangential section of ectosomal skeleton. D, oxeas.
FIGURE 7 in Four new species of Careproctus (Cottoidei: Liparidae) from the deep-water vicinity of the southern Kuril Islands (Western North Pacific)
FIGURE 7. Careproctus pulcher sp. nov., museum specimens, A–B, female 100 mm SL, holotype, ZMH 26373; paratypes, ZMH 26371: C, male 110 mm SL; D, juvenile 38 mm SL.
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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
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OpenNeuro
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