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43 results for “Pacific Arctic Ocean”
They Came From The Pacific: How changing Arctic currents could contribute to an ecological regime shift in the Atlantic Ocean - Lagrangian Data 1990-2002 (2 of 2)
<p>Supporting data for Kelly et al.: They Came From The Pacific: How changing Arctic currents could contribute to an ecological regime shift in the Atlantic Ocean (Earth's Future, submitted)<br> <br> Trajectories saved by year of release in the Bering Strait. All months from that year are included in the same file, with the first 1000 trajectories corresponding to January release, second 1000 from February release, and so on. <br> <br> Due to the size of files, this is split into two uploads. Part 1 covers 1970-1989 releases, 1990 onward is saved in Part 2. </p>
They Came From The Pacific: How changing Arctic currents could contribute to an ecological regime shift in the Atlantic Ocean - Lagrangian Data 1970-1989 (1 of 2)
<p>Supporting data for Kelly et al.: They Came From The Pacific: How changing Arctic currents could contribute to an ecological regime shift in the Atlantic Ocean (Earth's Future, submitted)<br> <br> Trajectories saved by year of release in the Bering Strait. All months from that year are included in the same file, with the first 1000 trajectories corresponding to January release, second 1000 from February release, and so on. <br> <br> Due to the size of files, this is split into two uploads. Part 1 covers 1970-1989 releases, 1990 onward is saved in Part 2. </p>
Fig. 4 in Variation of shell shape in Solariella obscura (Vetigastropoda: Trochoidea) in the Eurasian Arctic seas and adjacent part of the Western Pacific Ocean
Fig. 4. PCA scatterplots: A–C – varieties of Solariella obscura; typical form – red crosses, «var. intermedia» – black dots, «var. bella» – blue squares; D–F – geographic groups; Arctic – green crosses, Pacific – violet circles.
Fig. 1 in Variation of shell shape in Solariella obscura (Vetigastropoda: Trochoidea) in the Eurasian Arctic seas and adjacent part of the Western Pacific Ocean
Fig. 1. Varieties of Solariella obscura: A – «var. intermedia», Barents Sea, Iokangskie Islands, 68°04.38′ N, 39°34.70′ E, ZIN 28/4289; B – typical form, Bering Sea, 29 m, 64°02.2′ N, 170°04′ W, ZIN 675/56388; C – «var. bella», Barents Sea, 154 m, 69°40.597′ N, 34°06.184′ E. Scale bar 3 mm.
Fig. 2 in Variation of shell shape in Solariella obscura (Vetigastropoda: Trochoidea) in the Eurasian Arctic seas and adjacent part of the Western Pacific Ocean
Fig. 2. Scheme of shell measurements (A–B) and counting of whorls number (C). Shell of «var. bella». SH – shell height; BWH – body whorl height; AH – aperture height; AW – aperture width; SW – shell width; UW – umbilicus width; spiral arrow indicates the first whorl, whorls number of the shell = 3.9.
Fig. 3 in Variation of shell shape in Solariella obscura (Vetigastropoda: Trochoidea) in the Eurasian Arctic seas and adjacent part of the Western Pacific Ocean
Fig. 3. Box plots of conchological parameters: A – shell height; B – body whorl height; C – aperture height; D – shell width; E – umbilicus width; F – whorls number. 1 – «var. intermedia», 2 – typical form, 3 – «var. bella».
Fig. 2 in Observations ofApparent LoricaVariability inSalpingacantha (Ciliophora: Tintinnida) in the Northern Pacific and Arctic Oceans
Fig. 2. Varieties of Salpingacantha from a 2016 sample in the Chuk- chi Sea (2016 St 29). In the sample no typical Salpingella acuminata were found. In the conspectus of Kofoid and Campbell (1929) the form "a" most closely resembles S. ampla, "b" S. unguiculata, "c" S. simplex, "d" S. perca, and "e" S. crenulata. Note that form "c" if rotated 45° could easily be mistaken for Salpingella acuminata.
Fig. 1 in Observations ofApparent LoricaVariability inSalpingacantha (Ciliophora: Tintinnida) in the Northern Pacific and Arctic Oceans
Fig. 1. Varieties of Salpingacantha from a 2015 sample in the Chuk- chi Sea (2015 St 5). In the sample, typical Salpingella acuminata ("a") were dominant with 70 cells found for the 15 Salpingacantha cells encountered. The "b" most closely corresponds with S. crenulata, "c" and "d" with S. perca, "e" with S. unguiculata and "f" with S. ampla. Note that form "e", if rotated 45°, could easily be mistaken for Salpingella acuminata.
Fig. 3 in Observations ofApparent LoricaVariability inSalpingacantha (Ciliophora: Tintinnida) in the Northern Pacific and Arctic Oceans
Fig. 3. The illustrations of Salpingacantha species from Kofoid and Campbell 1929 arranged as the evolutionary series given in Kofoid & Campbell 1939 in which S. perca "presents the earliest phase in evolution of toothed oral margin": a. S. perca, b. S. crenulata, c. S. exilis, d. S. simplex, e. S. unguiculata, f. S. ampla, and g. S. undata. Note that S. perca, S. exilis, and S. unguiculata are depicted with a diaphragm apparatus similar to those of Salpingella (Agatha 2010).
Seasonal dynamics of sinking organic matter in the Pacific Arctic Ocean revealed by nitrogen isotope ratios of amino acids
<p><span>The Pacific Arctic Ocean has experienced a rapidly changing climate, sea-ice retreat, and enhanced primary production over the past few decades. The export production generated by photoautotrophs and heterotrophs has been characterized in the Arctic Ocean, but their seasonal variations in relative proportion are largely unknown due to the limited access in the ice-covered season. We measured the concentration and nitrogen isotope ratio of individual amino acids from sinking particles in the northern east Siberian Sea (KAMS1), northern Chukchi Sea (KAMS2), and Northwind Ridge (KAMS4) from August 2017 to July 2019. </span><span>The average trophic position, based on differences in the nitrogen isotope ratios of glutamic acid and phenylalanine, can indicate the relative proportions of biogenic organic matters derived from photoautotrophs and heterotrophs in sinking particles. Decreasing values (close to 1.0) in summer at KAMS2 in 2018 suggest that primary producers are responsible for most of the downward flux of sinking particles. However, the average trophic position at KAMS1 in 2017 increased to > 1.5 in autumn and was maintained at approximately 1.7 during ice-covered winter periods, likely due to greater contributions from heterotrophic organisms. Exceptionally high average trophic positions (close to 2.0) of sinking particles in summer at KAMS1 in 2017 and KAMS4 in 2018 were likely due to small export of photoautotrophs due to the surface seawater stratification and limited pelagic production. </span><span>T</span><span>he average trophic position in sinking particles should reflect the spatiotemporal variation in export particle composition in the </span><span>Pacific Arctic Ocean</span><span>.</span></p>
Seasonal dynamics of sinking organic matter in the Pacific Arctic Ocean revealed by nitrogen isotope ratios of amino acids
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FIGURE 22 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 22. Philine harrisae sp. nov. holotype (LACM 3437). A. Dissected specimen. B–C. Gizzard plates, inner view (B), outer view (C). D. Radula. E. Penis.
FIGURE 23 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 23. Philine harrisae sp. nov. Anatomy of the holotype (LACM 3437). A. Anterior portion of the digestive system. B. Male reproductive organs. C. Penis. Abbreviations: bb, buccal bulb; cns, central nervous system; e, esophagus; gz, gizzard; pe, penis; pr, prostate; rm, retractor muscle; sg, salivary gland.
FIGURE 19 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 19. Philine malaquiasi sp. nov. Anatomy of a specimen from the Beaufort Sea (LACM 72-254.16). A. Anterior portion of the digestive system. B. Male reproductive organs. Abbreviations: bb, buccal bulb; cns, central nervous system; e, esophagus; pe, penis; pr, prostate; sg, salivary gland.
FIGURE 16 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 16. Philine baxteri sp. nov. A–B. Ventral and dorsal view of a 2.9 mm shell from the Aleutian Islands (LACM 86- 354.8). C. Radula of a dried specimen from the Aleutian Islands (LACM 86-301.5).
FIGURE 15 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 15. Philine baxteri sp. nov. A. Dorsal view of a preserved specimen from the Aleutian Islands (LACM 71-253.3). B– C. Ventral and dorsal view of a 2.7 mm long shell from the Gulf of Alaska (LACM 57-12.82). D–E. Ventral and dorsal view of a 3 mm long shell from the Bering Sea (LACM 85-168.3). F. Dorsal view of the shell apex of a specimen from the Gulf of Alaska (LACM 59-23.32). G. Radula of a dried specimen from the Bering Sea (LACM 85-168.3).
FIGURE 12. Philine hemphilli Dall, 1919 and Woodbridgea williamsi Berry 1953. A–B in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 12. Philine hemphilli Dall, 1919 and Woodbridgea williamsi Berry 1953. A–B. Ventral and dorsal view of a 3.2 mm shell from Southern California (LACM 41-337.6). C–D. Ventral and dorsal view of a 3.4 mm shell from Baja California (LACM 71-158.48). E–F. Ventral and dorsal view of a 3.6 mm shell from southern Alaska (LACM 87-358.10). G. Ventral view of the holotype of Philine hemphilli (USNM 211753). H. Ventral view of the holotype of Woodbridgea williamsi (CASIZ 64608). I. Radula of a dried specimen of P. hemphilli from southern Alaska (LACM 87-369.5). J. Apical view of the shell of a specimen from southern Alaska (LACM 87-358.10).
FIGURE 10 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 10. Philine polystrigma (Dall, 1908). A. Dorsal view of a 16 mm preserved length specimen from Oregon (LACM 72-261.8). B. Shell sculpture same specimen as C and D. C–D. Ventral and dorsal view of a 4.5 mm shell from Oregon (LACM 178892). E. Ventral view of the holotype (USNM 110649). F–G. Outer and inner view of the gizzard plates of a specimen from Southern California (LACM 95-130.26). H. Radula, same specimen. I. Penis, same specimen.
FIGURE 18 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 18. Philine malaquiasi sp. nov. A–B. Dosal and lateral view of a 7 mm preserved length specimen from the Beaufort Sea (LACM 72-246.25). C–D. Dorsal and ventral view of a 4.2 mm long shell from the Beaufort Sea (LACM 71-362.8). E–F. Dorsal and ventral view of a 3 mm long shell from the Beaufort Sea (LACM 88-147.20). G–H. Dorsal and ventral view of a 4.3 mm long shell from the Beaufort Sea (LACM 72-254.16). I. Shell sculpture (LACM 71-362.8). J. Radula of a dried specimen from the Beaufort Sea (LACM 72-254.16).
FIGURE 9 in Philinidae, Laonidae and Philinorbidae (Gastropoda: Cephalaspidea: Philinoidea) from the northeastern Pacific Ocean and the Beaufort Sea (Arctic Ocean)
FIGURE 9. Philine bakeri (Dall, 1919). A–B. Ventral and dorsal view of a 1.6 mm shell from Southern California (LACM 69- 32.40). C. Ventral and dorsal view of a 1.6 mm shell from Southern California (LACM 77-110.9). D. Ventral view of the holotype (USNM 225194). E–F. Ventral and dorsal view of a 1.6 mm shell from Baja California (LACM 71-161.42). G. Radula, same specimen (dried parts).
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OpenNeuro
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