23
H.-J. Ceccaldi et al. (eds.), Marine Productivity: Perturbations and Resilience of Socio-ecosystems,
DOI 10.1007/978-3-319-13878-7_3, © Springer International Publishing Switzerland 2015
Abstract
We investigated the changes in phytoplankton quantity and diversity
after the March 11, 2011, Tohoku earthquake and tsunami in Ofunato
Bay and in the mouth of Kesennuma Bay in northeastern Japan.
Phytoplankton quantities increased in Ofunato Bay, and diversity
changed. The phytoplankton assemblages other than diatoms
increased near the water surface after the earthquake. In contrast, a
clear change was not observed at Iwaisaki, at the mouth of Kesennuma
Bay, during the survey. These results suggest that the infl uence of the
tsunami on phytoplankton varied by location. In this study, phytoplankton in Ofunato Bay were affected by the tsunami, which is enclosed
and was easily affected by the terrestrial environment and broken
seawall. Limited changes were observed at Iwaisaki at the entrance to
Kesennuma Bay.
Y. Okumura (*)
Research Center for Coastal Fisheries & Aquaculture ,
Tohoku National Fisheries Research Institute,
Fisheries Research Agency , 3-27-5, Shinhama ,
Shiogama , Miyagi 985-0001 , Japan
e-mail: okumura@affrc.go.jp
H. Nakaie
Miyagi Prefectural Government , 3-8-1,
Honmachi, Aoba-ku , Sendai , Miyagi 980-8570 , Japan
Short-Term Effects of the March 11,
2011, Tsunami on Phytoplankton
Assemblages in Ofunato
and Kesennuma Bays, Japan
Yutaka Okumura , Hiroshi Nakaie , Keisaku Kusaka ,
Tetsuroh Ishikawa , and Shinnosuke Kaga
K. Kusaka • T. Ishikawa
Kesennuma Fisheries Experiment Station ,
Miyagi Prefecture Fisheries Technology Institute ,
47-6, Suginosawa, Akaiwa , Kesennuma , Miyagi
988-0181 , Japan
S. Kaga
Iwate Fisheries Technology Center ,
Daisanchiwari, Heita , Kamaishi , Iwate 026-0001 , Japan
H.-J. Ceccaldi et al. (eds.), Marine Productivity: Perturbations and Resilience of Socio-ecosystems,
DOI 10.1007/978-3-319-13878-7_3, © Springer International Publishing Switzerland 2015
Abstract
We investigated the changes in phytoplankton quantity and diversity
after the March 11, 2011, Tohoku earthquake and tsunami in Ofunato
Bay and in the mouth of Kesennuma Bay in northeastern Japan.
Phytoplankton quantities increased in Ofunato Bay, and diversity
changed. The phytoplankton assemblages other than diatoms
increased near the water surface after the earthquake. In contrast, a
clear change was not observed at Iwaisaki, at the mouth of Kesennuma
Bay, during the survey. These results suggest that the infl uence of the
tsunami on phytoplankton varied by location. In this study, phytoplankton in Ofunato Bay were affected by the tsunami, which is enclosed
and was easily affected by the terrestrial environment and broken
seawall. Limited changes were observed at Iwaisaki at the entrance to
Kesennuma Bay.
Y. Okumura (*)
Research Center for Coastal Fisheries & Aquaculture ,
Tohoku National Fisheries Research Institute,
Fisheries Research Agency , 3-27-5, Shinhama ,
Shiogama , Miyagi 985-0001 , Japan
e-mail: okumura@affrc.go.jp
H. Nakaie
Miyagi Prefectural Government , 3-8-1,
Honmachi, Aoba-ku , Sendai , Miyagi 980-8570 , Japan
Short-Term Effects of the March 11,
2011, Tsunami on Phytoplankton
Assemblages in Ofunato
and Kesennuma Bays, Japan
Yutaka Okumura , Hiroshi Nakaie , Keisaku Kusaka ,
Tetsuroh Ishikawa , and Shinnosuke Kaga
K. Kusaka • T. Ishikawa
Kesennuma Fisheries Experiment Station ,
Miyagi Prefecture Fisheries Technology Institute ,
47-6, Suginosawa, Akaiwa , Kesennuma , Miyagi
988-0181 , Japan
S. Kaga
Iwate Fisheries Technology Center ,
Daisanchiwari, Heita , Kamaishi , Iwate 026-0001 , Japan