The influence and impact of tsunamis on the microorganism assembly of Nagatsura-Ura Lagoon, Miyagi, northeastern Japan

Okumura, Yutaka; Matsuoka, Hiromi; Arakawa, Hisayuki; Tokanai, Fuyuki; Suzuki, Atsushi; Irizuki, Toshiaki; Kajita, Hiroto; Hara, Motoaki

doi:10.1007/s12562-020-01472-8

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…It is considered that there is no problem with the fact that the preservation period of the DNA samples from 2004-2005 was more than 10 years, because DNA has been sequenced successfully from sediment core samples following tens of thousands of years earlier (Lejzerowicz et al, 2013). Similarly, we have also confirmed that DNA sequencing is possible from samples several hundred years old (Okumura et al, 2021b), so decomposition of DNA samples over several decades preserved in a freezer is expected to be minimal.…”

Section: Discussionsupporting

confidence: 74%

“…The primer pair was TAReuk454FWD1 and TAReukREV3 (Stoeck et al, 2010), with an adapter attached outside of the primer for analysis by Miseq (Illumina, California, U.S.A.). All procedures, such as the PCR reaction, treatment of amplicons, DNA sequencing, and data analysis, were performed as reported previously (Okumura et al, 2021b).…”

Section: Dna Sequencing Of 18s Rdna By Miseq Dna Sequencer and Data A...mentioning

confidence: 99%

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Influence of oyster and seaweed cultivation facilities on coastal environment and eukaryote assemblages in Matsushima Bay, northeastern Honshu, Japan

Okumura

Masuda²,

Matsutani

et al. 2023

Front. Mar. Sci.

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The northeastern coast of Japan suffered a massive tsunami in 2011, a natural disaster which ‘reset’ the coastal ecosystem when it destroyed much of the original sealife and scoured the seabed. This has presented an opportunity to learn more about the load on coastal ecosystems exerted by human exploitation such as aquaculture rafts and areas of anchored and float-suspended ropes. We surveyed the coastal environment in Matsushima Bay for approximately four years following the year after the occurrence of the 2011 tsunami. Phytoplankton abundance increased with increasing water temperature. Nutrient concentrations were high at the exit of a small branch of the Ofuna-iri Canal (entering the southwestern inner part of the bay at Shiogama) but no significant differences in nutrient concentrations were observed at other stations, so it is considered that the aquaculture installations in Matsushima Bay currently have no significant effect on observed nutrient concentrations. The composition of eukaryotes in the surface seawater varied with the year and the season, but there were no clear differences between sampling stations. The lack of any differences in nutrient concentrations or eukaryote assemblages between areas with or without aquaculture installations is considered to be a result of efficient seawater exchange, despite the presence of many small islets separating Matsushima Bay from the open ocean. In addition, the aquaculture installations at present number less than half of the maximum number before the tsunami, so the bay is by no means overexploited by aquaculture. It is concluded that the current aquaculture installations have no major negative impact on the environment in Matsushima Bay.

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Section: Discussionsupporting

confidence: 74%

Section: Dna Sequencing Of 18s Rdna By Miseq Dna Sequencer and Data A...mentioning

confidence: 99%