The system of biological production and ecological change in the huge lake promoted by the process of material loading and circulation of Lake Baikal

贝加尔湖物质加载和循环过程促进的大湖生物生产和生态变化系统

• 批准号: 14255015
• 负责人: SUGIYAMA Masahito
• 金额: $ 27.46万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14255015/
• 关键词: Lake Baikal; Material loading; Material circulation; Biological production; Ecological change; Settling particle; Upwelling of deep water; Nutrients; リン酸代謝; 生物群集密度; セジメントトラップ; 付着藻類

We have got the following scientific results by our research for 4 years from 2002 to 2005.1. Composition and seasonal change of settling flux were examined in Barguzin Bay and off-shore area of Listvyanka. Significant increase of the flux by active biological production was observed from ice-covered to thawing periods of the lake.2. Bio-geochemical dynamics of urea was studied. Residence time of urea in the surface water was 3-6 days in summer, but was very long and 560 days in winter.3. Horizontal and vertical distributions, trophic state, production limiting factor of picophytoplankton was examined. Abundance of the plankton increased in off-shore area of Barguzin Bay, but was not under phosphorus limitation.4. Nutrient limitation in the primary production of phytoplankton was studied. In the southern and central Lake Baikal, the first limiting nutrient was thought to be phosphorus rather than nitrogen during summer.5. Dissolved organic matter was characterized with Fourier transfor … More m ion cyclotron resonance mass spectrometry. Alloctonus humic substances were elucidated to be brought to off-shore areas without denaturalization. Autochtonus organic matter, such as organic sulfur compounds, were produced in the area.6. Phosphate uptake and accumulation mechanisms of water plant were studied. Significant difference was not shown between their mechanisms of Elodea and Egeria in Lakes Baikal and Biwa.7. Standing crop and photosynthetic production of attached algal communities were studied at the littoral zone of the southern basin. High biomass were recorded especially in Ullothrix and Drapanaldiopsis dominated communities. The algal mat of Ullothrix developed on rocks on shallow near shore sites showed very high rate of gross photosynthesis.8. Vertical and horizontal abundance of bacteria, phytoplankton and protists were examined in Barguzin Bay. In off-shore, significant correlations were detected between concentrations of chlorophyll a and density of a filter feeding or raptorial ciliates.9. The abundance, growth and grazing loss rates of picophytoplankton were investigated in Barguzin Bay. There was a difference in the abundance, composition and ecological role in the microbial food web of picophytoplankton between the near-shore and the off-shore areas.10. Long time survey of water temperature was performed from June to October in 2004. Temperature decrease with 10℃ difference was observed at the same time in the surface layers on the western coasts of the central and southern basins in summer. Up-welling of deep lake water was suggested to occur. Less

从2002年到2005.1，我们经过4年的研究，取得了以下科学成果。对巴尔古津湾和利斯特维扬卡近海地区沉降通量的组成和季节变化进行了研究。湖泊冰封期到解冻期，生物生产活跃，通量显着增加。 2．研究了尿素的生物地球化学动力学。尿素在地表水中的停留时间夏季为3～6天，冬季则较长，可达560天。 3．考察了超微型浮游植物的水平和垂直分布、营养状态、生产限制因素。巴尔古津湾近岸浮游生物丰度增加，但未受到磷限制。 4．研究了浮游植物初级生产中的营养限制。在贝加尔湖南部和中部，夏季第一限制性养分被认为是磷而不是氮。5．溶解的有机物采用傅里叶变换离子回旋共振质谱进行表征。 Alloctonus 腐殖质被阐明可以在不变性的情况下被带到近海地区。区内产生有机硫化合物等原生有机质。6．研究了水生植物对磷酸盐的吸收和积累机制。贝加尔湖和琵琶湖伊乐藻和伊吉利亚的作用机制没有表现出显着差异。7．在南部盆地沿岸地区研究了常备作物和附着藻类群落的光合生产。特别是在 Ullothrix 和 Drapanaldiopsis 占主导地位的群落中记录了高生物量。近岸浅海岩石上发育的Ullothrix藻垫表现出极高的总光合作用率。8．对巴尔古津湾细菌、浮游植物和原生生物的垂直和水平丰度进行了检查。在近海，叶绿素 a 的浓度与滤食性纤毛虫或猛禽纤毛虫的密度之间存在显着相关性。9。对巴尔古津湾超微型浮游植物的丰度、生长和放牧损失率进行了调查。近岸和近海地区微型浮游植物微生物食物网的丰度、组成和生态作用存在差异。10． 2004年6月至10月进行了长时间的水温调查，夏季盆地中部和南部西岸表层同时出现了10℃的水温下降。建议发生深湖水的上涌。较少的

项目成果

Chemistry in the Ocean and lakes.

海洋和湖泊中的化学。

• 发表时间: 2005
• 作者: Kondo;K.;M.Sugiyama et al.
• 通讯作者: M.Sugiyama et al.

海と湖の化学-微量元素で探る

海洋和湖泊化学 - 探索微量元素

• 发表时间: 2005
• 作者: 加賀谷 良平;杉山雅人ら
• 通讯作者: 杉山雅人ら

Distribution of dissolved organic carbon in lakes of different trophic types

• DOI: 10.1007/s10201-004-0128-3
• 发表时间: 2004-12
• 期刊: Limnology
• 影响因子: 1.6
• 作者: Yuko Sugiyama;Aya Anegawa;T. Kumagai;Y. Harita;T. Hori;M. Sugiyama

Vertical planktonic structure in the central basin of Lake Baikal in summer 1999, with special reference to the microbial food web

1999 年夏季贝加尔湖中央盆地的垂直浮游结构，特别参考微生物食物网

• 发表时间: 2003
• 期刊: Limnology 4
• 作者: Tsuda Y.;Suwonkerd W.;Chawprom S.;Prajakwong S.;Takagi M.;S.Nakano et al.
• 通讯作者: S.Nakano et al.

Air-segmented continuous-flow analysis for molybdenum in various geochemical samples

对各种地球化学样品中的钼进行空气分段连续流分析

• 发表时间: 2003
• 期刊: Microchim. Acta 142
• 作者: 吉田 憲司;Y.Harita et al.
• 通讯作者: Y.Harita et al.