Study on the Seaweed Bed Formation by Water-Drainage Deep Sea Water

Seto, Masabumi; Kawai, Tadashi; Makiguchi, Norito

doi:10.2208/prooe.17.123

Cited by 4 publications

(2 citation statements)

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“…Buccinum tsubai is a direct development species and thought to have a very limited ability to disperse. 10 This reproductive strategy would preclude gene flow between the neighboring subpopulations of B. tsubai. Several studies have focused on the genetic diversity of populations of deep-sea organisms.…”

Section: Discussionmentioning

confidence: 99%

Genetic population structure of the deep-sea whelk Buccinum tsubai in the Japan Sea

Iguchi¹,

Ueno

Maeda

et al. 2004

Fisheries Sci

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The purpose of the present paper was to examine the genetic population structure of Buccinum tsubai in the Japan Sea. Mitochondrial 16SrRNA gene sequence analysis was performed with specimens from various stations in the Japan Sea. Mitochondrial lineages were clearly patterned geographically in four separate areas: the Hokkaido area, the Yamagata-Toyama area, the Yamato Bank area, and the San'in area. The main distribution depth range of B. tsubai is between 200 m and 1000 m isodepths, and the horizontal distance between the 200 m and 1000 m isodepth lines represents the specific spatial scale of the habitat (SSSH). These four areas were separated either by the complete discontinuity of the SSSH area or by its narrow spatial extension. Genetic distances between the main haplotypes of each area were calculated as Jukes-Cantor distances, the value of which ranged between 0.012 and 0.017. This value seemed to be unrelated to the geographic distance. There was no tendency for clustering according to depth. In future, the morphological characters of the four lineages of B. tsubai should be compared in detail in order to elucidate significant genetic differences among them.

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Section: Discussionmentioning

confidence: 99%

Genetic population structure of the deep-sea whelk Buccinum tsubai in the Japan Sea

Iguchi¹,

Ueno

Maeda

et al. 2004

Fisheries Sci

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“…Seasonal changes of nutrient concentrations on the west coast of the Japan Sea off Hokkaido, an area strongly influenced by the Tsushima Warm Current water, have been observed by monitoring the nutrient status of the sea current [ 46 , 47 ]. DIN concentrations reach a maximum level of about 5 μM in winter, significantly decrease in spring, and reach a minimum of almost 0 μM from spring to autumn.…”

Section: Resultsmentioning

confidence: 99%

Historical δ15N records of Saccharina specimens from oligotrophic waters of Japan Sea (Hokkaido)

Kuribayashi¹,

Abe²,

Montani³

2017

PLoS ONE

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Historically Saccharina spp. beds occurred along the west coast of Hokkaido, an oligotrophic area, and were commercially exploited. Currently extensive commercial Saccharina spp. beds do not form due to nutrient limitations. Here, we postulate that nutrients assimilated by paleo-Saccharina spp. beds may have been derived from spawning herrings (Clupea pallasii) acting as organisms that formed a vector from their feeding grounds (Okhotsk Sea and Pacific Ocean) to their spawning area (west coast of Hokkaido, Japan Sea). To test this hypothesis we examined stable nitrogen isotope ratios (δ15N) of 100– to 135–year-old Saccharina specimens preserved at the Herbarium (Hokkaido University Museum). δ15N values of the paleo-Saccharina specimens collected from this region were in the range of 10‰, which is significantly higher than the current 3–7‰ in freshly sampled Saccharina spp. This high δ15N indicates that spawning herring (Clupea pallasii) had potentially been a significant source of dissolved inorganic nitrogen (DIN) absorbed by Saccharina, acting as an organism forming a vector for transporting nutrients from eutrophic to oligotrophic coastal ecosystems. Our findings support the hypothesis of so-called “herring-derived nutrients.”

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A fundamental study on behavior of deep ocean water discharged for seaweed bed generation

Takahashi

Tabeta

Iseki

et al. 2016

2016 Techno-Ocean (Techno-Ocean)

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Study on the Seaweed Bed Formation by Water-Drainage Deep Sea Water

Abstract: This research uses deep sea water ashore, when spraying the water on ocean again, it examines the effect

Cited by 4 publications

References 0 publications

Genetic population structure of the deep-sea whelk Buccinum tsubai in the Japan Sea

Genetic population structure of the deep-sea whelk Buccinum tsubai in the Japan Sea

Historical δ15N records of Saccharina specimens from oligotrophic waters of Japan Sea (Hokkaido)

A fundamental study on behavior of deep ocean water discharged for seaweed bed generation

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