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Studies on Morphology and Physiological Ecology of Laminaria (Phaeophyta)

海带（褐藻门）形态与生理生态学研究

基本信息

批准号：
12460082
负责人：
TANIGUCHI Kazuya
金额：
$ 8.96万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

Studies on Morphology and Physiological Ecology of Laminaria (Phaeophyta)Comparative studies on morphology and physiological ecology of Laminaria japonica, L. religiosa, L. ochotensis, and L. angustata cultivated on long-lines were carried out in Matsushima Bay from October 1999 to July 2002. Additionally, oceanographic conditions and dynamics of phytoplanktons in the bay were investigated to explore the possibility of prevention of red tide by the nutrient uptake capacity of Laminaria. It was considered that cultivated L. japonica, L. religiosa and L. ochotensis were same species as morphological and physiological features were identical, but only L. augustata was a different species. During winter to summer, Laminaria species adapted to water temperature, sustained high photosynthesis rates in their lamina excluding meristems and high nutrient uptake rates in their meristems. As the results, abundant carbon and nitrogen were accumulated in the meristems. The erosion of the tip lamina initiating from early growing period (December) also contributed to accumulations of carbon and nitrogen in the meristems. The accumulation of abundant carbon and nitrogen in the meristems ensure the maturation in fall and regrowth in the next winter. Harvest of Laminaria species appear to be abundant under the combined hydrographic condition of low temperature and high nutrient level from winter to spring as high photosynthesis rates and nutrients requirement were sustained during the period. Dominated phytoplanktonic species were diatoms and few red tide species were found in Matsushima Bay. Diatom populations in water columns were sustained from their resting spores found in muddy bottoms throughout the year.

海带的形态学和生理生态学研究海带、海带、海带的形态学和生理生态学的比较研究宗教湖，加-地ochotensis和L. 1999年10月至2002年7月，在松岛湾进行了长线栽培的angustata。此外，还对该湾的海洋条件和藻类动态进行了调查，以探讨利用海带的营养盐吸收能力预防赤潮的可能性。认为栽培L. japonica，L. religiosa和L. ochotensisL.奥古斯塔塔是另一个物种从冬到夏，海带对水温的适应性较强，除分生组织外的叶片光合速率较高，分生组织对养分的吸收速率较高。结果表明，分生组织中积累了丰富的碳和氮。从生长初期（12月）开始的顶端叶片的侵蚀也有助于碳和氮在分生组织中的积累。分生组织中丰富的碳和氮的积累保证了秋季的成熟和下一个冬季的再生。从冬季到春季，在低温和高营养水平的组合水文条件下，海带物种的收获似乎是丰富的，因为在此期间维持高光合速率和营养需求。松岛湾的优势藻种为硅藻，赤潮种类较少。水柱中的硅藻种群是全年从泥底中发现的休眠孢子中维持的。