Phylogeography of the cold-water barnacleChthamalus challengeriin the north-western Pacific: effect of past population expansion and contemporary gene flow

2012 ◽  
Vol 39 (10) ◽  
pp. 1819-1835 ◽  
Author(s):  
Chi Chiu Cheang ◽  
Ling Ming Tsang ◽  
Wai Chuen Ng ◽  
Gray A. Williams ◽  
Ka Hou Chu ◽  
...  
Keyword(s):  
Gene Flow ◽  
Cold Water ◽  
Population Expansion ◽  
Western Pacific ◽  
The North ◽  
Contemporary Gene Flow ◽  
Past Population ◽  
North Western ◽  
North Western Pacific

Effects of Pleistocene glaciation on the phylogeographic and demographic histories of chub mackerel Scomber japonicus in the north-western Pacific

2018 ◽  
Vol 69 (4) ◽  
pp. 514 ◽  
Author(s):  
Jiao Cheng ◽  
Zhiqiang Han ◽  
Na Song ◽  
Tianxiang Gao ◽  
Takashi Yanagimoto ◽  
...  
Keyword(s):  
Population Expansion ◽  
Western Pacific ◽  
Middle Pleistocene ◽  
Scomber Japonicus ◽  
Chub Mackerel ◽  
Genetic Structuring ◽  
Climatic Fluctuations ◽  
The North ◽  
North Western ◽  
North Western Pacific

Pleistocene glacial cycles associated with geological and climatic changes have been suggested to affect the distribution and abundance of marine organisms in the north-western Pacific. In addition to historical processes, several contemporary forces are associated with spatial distributions and genetic structuring of marine species. Herein, we gathered partial mitochondrial control region sequences of chub mackerel Scomber japonicus from 14 localities over most of its geographical range in the north-western Pacific to infer the effect of Pleistocene climatic fluctuations on its historical demography, and to assess the role of historical process and contemporary factors in shaping present-day patterns of genetic differentiation within this species. Phylogeographic patterns revealed two distinct lineages that originated in vicariance during the Middle Pleistocene. However, there was no evidence of phylogeographic partitioning of haplotypes over the sampled range. Population structure analyses indicated a high degree of genetic homogeneity among chub mackerel populations. Demographic analyses indicated both lineages experienced Late Pleistocene population expansion. The observed genetic pattern of chub mackerel is consistent with a scenario of the survival of this species in at least two allopatric glacial refugia during the glacial maxima of the Pleistocene followed by massive dispersals throughout the north-western Pacific and species-specific ecological processes facilitating contemporary gene flow.

Little-known arctic species Montacuta spitzbergensis (Bivalvia: Montacutidae) from the north-western Pacific with notes on Montacuta substriata and Tellimya ferruginosa

2008 ◽  
Vol 88 (2) ◽  
pp. 347-356 ◽  
Author(s):  
Gennady M. Kamenev
Keyword(s):  
Sea Of Okhotsk ◽  
First Record ◽  
Western Pacific ◽  
The Arctic ◽  
Arctic Species ◽  
The North ◽  
The Pacific ◽  
The Pacific Ocean ◽  
North Western ◽  
North Western Pacific

An expanded description of a little-known arctic species Montacuta spitzbergensis from the Sea of Okhotsk with new data on its morphology, ecology and geographical distribution is given. This is the first record of M. spitzbergensis from the north-western Pacific. It differs from other species of Montacuta in its large (to 8.4 mm), elongate–ovate, thick shell with wide, slightly curved hinge plate, wide, short, and shallow resilifer, and weakly developed external ligament. This species occurs in the Arctic Ocean (Spitsbergen, Barents, Kara, Laptev and Chukchi Seas) and the Pacific Ocean (Sea of Okhotsk) at depths from 9 to 232 m at a bottom temperature from −1.62°C to +2.50°C. The hinge structure of the type species of the genera Montacuta and Tellimya is also discussed.

First monodontid cetacean (Odontoceti, Delphinoidea) from the early Pliocene of the north‐western Pacific Ocean

2018 ◽  
Vol 5 (2) ◽  
pp. 323-342 ◽  
Author(s):  
Hiroto Ichishima ◽  
Hitoshi Furusawa ◽  
Makino Tachibana ◽  
Masaichi Kimura
Keyword(s):  
Pacific Ocean ◽  
Western Pacific ◽  
Western Pacific Ocean ◽  
Early Pliocene ◽  
The North ◽  
North Western ◽  
North Western Pacific

scholarly journals Controlling factor of incoming plate hydration at the north-western Pacific margin

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Gou Fujie ◽  
Shuichi Kodaira ◽  
Yuka Kaiho ◽  
Yojiro Yamamoto ◽  
Tsutomu Takahashi ◽  
...  
Keyword(s):  
Controlling Factor ◽  
Western Pacific ◽  
The North ◽  
Pacific Margin ◽  
North Western ◽  
North Western Pacific

scholarly journals Development of a Biogeochemical and Carbon Model Related to Ocean Acidification Indices with an Operational Ocean Model Product in the North Western Pacific

2019 ◽  
Vol 11 (9) ◽  
pp. 2677 ◽  
Author(s):  
Miho Ishizu ◽  
Yasumasa Miyazawa ◽  
Tomohiko Tsunoda ◽  
Xinyu Guo
Keyword(s):  
Ocean Acidification ◽  
General Circulation ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Ocean Model ◽  
Western Pacific ◽  
Total Alkalinity ◽  
The North ◽  
North Western ◽  
North Western Pacific

We developed a biogeochemical and carbon model (JCOPE_EC) coupled with an operational ocean model for the North Western Pacific. JCOPE_EC represents ocean acidification indices on the background of the risks due to ocean acidification and our model experiences. It is an off-line tracer model driven by a high-resolution regional ocean general circulation model (JCOPE2M). The results showed that the model adequately reproduced the general patterns in the observed data, including the seasonal variability of chlorophyll-a, dissolved inorganic nitrogen/phosphorus, dissolved inorganic carbon, and total alkalinity. We provide an overview of this system and the results of the model validation based on the available observed data. Sensitivity analysis using fixed values for temperature, salinity, dissolved inorganic carbon and total alkalinity helped us identify which variables contributed most to seasonal variations in the ocean acidification indices, pH and Ωarg. The seasonal variation in the pHinsitu was governed mainly by balances of the change in temperature and dissolved inorganic carbon. The seasonal increase in Ωarg from winter to summer was governed mainly by dissolved inorganic carbon levels.

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