Preliminary Report of Impacts of the 2011 Earthquake and Tsunami and Subsequent Events on Macrobenthic Community in a Shallow Brackish Lagoon in Sendai Bay, Japan

Kondoh, Tomohiko; Nakayama, Gai; Sato-Okoshi, Waka

doi:10.1007/978-3-030-43484-7_11

Cited by 2 publications

(4 citation statements)

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“…This resulted in destabilizing the sand sedimentation dynamics and changes in the water level. Although these changes were not as large as the disturbance caused by the 2011 Great East Japan Earthquake and tsunami (Kanaya et al, 2012;Kondoh et al, 2020), they likely had a significant impact on the population dynamics of C. aff. teleta.…”

Section: How To Maintain a Population In Gamo Lagoonmentioning

confidence: 98%

“…Capitella aff. teleta found only in Gamo Lagoon (Tomioka et al, 2016) predominantly appeared in Gamo Lagoon immediately after the tsunami that followed the 2011 Great East Japan Earthquake and tsunami (Kondoh, 2017;Kondoh et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Gamo Lagoon is a eutrophic lagoon located at the mouth of the Nanakita River in Miyagi Prefecture, northeastern Japan. Gamo Lagoon was catastrophically damaged by a megathrust earthquake-the 2011 Great East Japan Earthquake-and huge tsunamis that occurred in March 2011 (Ide et al, 2011;Ozawa et al, 2011), which have caused drastic topographic changes (Kondoh et al, 2020). Just after the disturbance, a sand dune completely disappeared but was rapidly reformed, the river mouth was completely closed, a seasonal typhoon-induced flood hit the lagoon, and an intense deluge occurred in 2015.…”

Section: Introductionmentioning

confidence: 99%

“…Just after the disturbance, a sand dune completely disappeared but was rapidly reformed, the river mouth was completely closed, a seasonal typhoon-induced flood hit the lagoon, and an intense deluge occurred in 2015. The second tsunami followed by the Fukushima Earthquake hit this estuary again in 2016; therefore, the balance of sand sedimentation dynamics remained unstable (Kondoh et al, 2020). Restoration and reconstruction work are underway, although many years have passed since the 2011 earthquake and tsunami.…”

Section: Introductionmentioning

confidence: 99%

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Population dynamics of Capitella aff. teleta (Polychaeta, Capitellidae) in Gamo Lagoon, northeastern Japan, during a series of restoration works following the 2011 Great East Japan Earthquake and tsunami

Hashimoto

Sato-Okoshi²

2022

Front. Mar. Sci.

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The population dynamics of the capitellid polychaete Capitella aff. teleta were studied in Gamo Lagoon, located in northeast Japan, for the subsequent 2 years from 2016, when a series of restoration works was conducted following the 2011 Great East Japan Earthquake and tsunami. Capitella aff. teleta was found to be widely distributed from the estuary side, where the levee was located, to the innermost part but was more abundant in the innermost part, which is rich in organic matter. In the lagoon, the daily maximum water level dropped from 2017 to 2018 during the reconstruction of a flow-conducting levee, which blocked water flow and isolated the inner part of the lagoon. Although the density decreased drastically for approximately 11 months under diurnal hypoxia and strongly reducing conditions, small-sized new recruits were observed and the population recovered quickly after the daily maximum water level increased. In Gamo Lagoon, C. aff. teleta inhabiting the innermost part and estuary side of the lagoon contributed to maintaining the population by dispersing planktonic larvae between them. Thus, the maximum water level had a significant effect on the maintenance of the C. aff. teleta population in the lagoon, and sufficiently high water levels enable the dispersion of planktonic larvae to help recover the population quickly, suggesting that it is important to keep the water area connected.

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Section: How To Maintain a Population In Gamo Lagoonmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%