28
equal to those from 2010 to 2011 before the
earthquake (0.11–4.7 µg/L; Fig. 2a ) and those
from 2004 to 2005 (0.1–6.0 µg/L), which
included the inner part of Kesennuma Bay (Ito
et al. 2007 ).
The increase in Chl a concentration during
spring agreed with the increase in fucoxanthin
concentration (see Fig. 2a ). The increase in Chl a
concentration in autumn agreed with the increase
in peridinin concentration. This was observed
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
May 18
May 25
June 1
June 8
June 15
June 22
June 29
July 6
July 13
July 20
July 27
August3
August17
Chl
a (µg/L)
2010
Date
0m
2m
4m
6m
8m
10m
12m
14m
16m
18m
20m
22m
June, 2011
Depth
0m
2m
4m
6m
8m
10m
12m
14m
16m
18m
20m
22m
Haptophyceae
Dinophyceae
Peragophyceae
Prasinophyceae
Cryptophyceae
Bacillariophyceae
July, 2012
Depth
Fig. 3 Concentration of Chl a in Ofunato Bay
Fig. 4 Nonmetric multidimensional scaling by pigment concentration at Iwaisaki and in Ofunato Bay
Y. Okumura et al.