| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
Oligotrophication, decreasing trend of nutrients was examined in Mutsu bay, a semi-enclosed bay where intensive bivalve culture was carried out. Average nutrient concentration has decreased by one-third since 1970s when scallop culture was introduced to the bay. The causes for this oligotrophication were landings of scallop and the increase in deposition of scallop feces to the sediment surface, resulting in the removal of N and P from the bay.
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