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.

海带形态和生理生态学研究 1999年10月至7月在松岛湾进行了延绳栽培海带、L. religiosa、L. ochotensis和L. angustata形态和生理生态的比较研究2002年。此外，还对海湾的海洋状况和浮游植物动态进行了调查，以探索预防的可能性海带的养分吸收能力对赤潮的影响。认为栽培的L. japonica、L. religiosa 和L. ochotensis 为同一种，形态和生理特征相同，仅L. augustata 为不同种。从冬季到夏季，海带物种适应了水温，在其叶片（不包括分生组织）中维持高光合作用率，并在其分生组织中维持高养分吸收率。结果，分生组织中积累了丰富的碳和氮。从生长早期（12 月）开始的尖端叶片的侵蚀也促进了分生组织中碳和氮的积累。分生组织中积累了丰富的碳和氮，确保了秋季的成熟和来年冬季的重新生长。在冬季至春季低温和高营养水平的综合水文条件下，海带物种的收获似乎很丰富，因为在此期间持续高光合作用速率和营养需求。松岛湾浮游植物以硅藻为主，赤潮种类较少。水柱中的硅藻种群全年依靠在泥泞底部发现的休眠孢子来维持。