| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
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| Outline of Final Research Achievements |
This study aimed to assess the response of benthic faunal communities to ocean acidification using a CO2 seep. We compared the community structure of benthic communities between acidified sites and control sites. Thereafter, the results showed that the abundance and diversity of gastropods and hermit crabs (which utilize shells) decreased in acidified sites. This suggested that the decline in hermit crab populations was indirectly caused by a reduction in the number of available shells. Laboratory experiments to estimate survival rates showed that the larval mortality of certain hermit crab species directly increased with acidification. Thereby, the decline in species diversity of hermit crabs was directly caused by the larval depletion of species vulnerable to acidification. Overall, our study suggested that ocean acidification has a significant impact on benthic faunal communities not only through direct effects but also through indirect effects.
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