NDLI: Seasonal succession in the diatom community of Sendai Bay, northern Japan, following the 2011 off the Pacific coast of Tohoku earthquake

Content Provider	Springer Nature Link
Author	Watanabe, Tsuyoshi Taniuchi, Yukiko Kakehi, Shigeho Sakami, Tomoko Kuwata, Akira
Copyright Year	2016
Abstract	Sendai Bay in northern Japan suffered serious damage from massive tsunamis generated by the 2011 off the Pacific coast of Tohoku earthquake. The physical disturbance caused by a tsunami may affect the coastal ecosystem, including the planktonic diatom community. We investigated seasonal changes in the diatom community structure at a coastal and an offshore station in Sendai Bay, from June 2011 (3 months after the tsunami) to April 2014. Diatom abundance increased at both stations during the spring. Sporadic increases were also recorded at the coastal station during the summer because of silicate input from river discharge. Seasonal succession of the diatom communities was similar at both the coastal and offshore stations. The onset of the spring bloom consisted mainly of Chaetoceros spp. when water temperatures were low. Subsequently, species such as Skeletonema costatum s.l. became dominant as salinity and nutrient concentrations decreased. Cell density decreased from summer into early winter. Leptocylindrus danicus became dominant in the summer, but was replaced by Thalassiosira cf. mala from autumn into winter. Redundancy analysis (RDA) showed that most of the variation in the diatom community could be explained by temperature, salinity, NO$_{3}$ $^{−}$, NO$_{2}$ $^{−}$, PO$_{4}$ $^{3−}$, and SiO$_{2}$. In addition, the occurrence of diatom species before the tsunami showed a similar pattern to that after the tsunami, suggesting that the tsunami did not have a serious impact on the diatom community in Sendai Bay.
Starting Page	133
Ending Page	144
Page Count	12
File Format	PDF
ISSN	09168370
Journal	Journal of Oceanography
Volume Number	73
Issue Number	1
e-ISSN	1573868X
Language	English
Publisher	Springer Japan
Publisher Date	2016-07-19
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chaetoceros Diatom Phytoplankton Sendai Bay Redundancy analysis (RDA) Skeletonema costatum s.l. Oceanography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Oceanography

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