NDLI: Phytoplankton community structure in Otsuchi Bay, northeastern Japan, after the 2011 off the Pacific coast of Tohoku Earthquake and tsunami

Content Provider	Springer Nature Link
Author	Tachibana, Aiko Nishibe, Yuichiro Fukuda, Hideki Kawabe, Kyoko Tsuda, Atsushi
Copyright Year	2016
Abstract	The tsunami caused by the 2011 off the Pacific coast of Tohoku Earthquake seriously damaged the Pacific coast of northeastern Japan. In addition to its direct disturbance, a tsunami can indirectly affect coastal pelagic ecosystems via topographical and environmental changes. We investigated seasonal changes in the phytoplankton community structure in Otsuchi Bay, northeastern Japan, from May 2011, which was 2 months after the tsunami, to May 2013. The phytoplankton species composition in May 2011 was similar to that observed in May 2012 and 2013. The present results are consistent with the dominant species and water-mass indicator species of phytoplankton in past records. These results suggest that there was no serious effect of the tsunami on the phytoplankton community in Otsuchi Bay. Community analysis revealed that two distinct seasonal communities appeared in each year of the study period. The spring–summer community was characterized by warm-water Chaetoceros species, and dinoflagellates appeared from May to September. The fall–winter community was characterized by cold neritic diatoms, which appeared from November to March. The succession from the spring–summer community to the fall–winter community took place within a particular water mass, and the fall–winter community appeared in both the surface water and the Oyashio water mass, suggesting that water-mass exchange is not the only factor that determines the phytoplankton community structure in Otsuchi Bay.
Starting Page	55
Ending Page	65
Page Count	11
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	2016-03-03
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phytoplankton Diatom Otsuchi Bay Earthquake Seasonality Oceanography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Oceanography

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