Mechanisms of phytoplankton coexistence
浮游植物共存机制
基本信息
- 批准号:15570011
- 负责人:
- 金额:$ 2.24万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In this project, we studied mechanisms of phytoplankton coexistence, experimentally and theoretically.(1) Culture experiments: Using continuous cultures of phytoplanktonic species, we examined coexistence and competition under various concentration of nutrients and flow speed of culture medium. Competition and exclusion of the green alga Scenedesmus quadricauda and the cyanobacterium Microcystis novacekii depended on nutrient concentration and flow speed of supply culture medium. Since experiments with varying supply modes of the medium, especially, has not been tried to date, the present results on the effects of the supply mode were new.(2) Theoretical analysis: Competition in the low flow continuous culture, the paradox of plankton and the paradox of enrichment were examined. Dominant species in homogeneous environments is considered to be one or a few. Phytoplankton species diversity is usually high, though water environments seems homogeneous. This high diversity has been called " … More the paradox of plankton." In the higher nutrient conditions, diversity is considered to increase. However, diversity in the field observation of many water environments, this is not the case. This diversity change along nutrient gradient is called "the paradox of enrichment."In the low nutrient and low flow continuous cultures, phytoplankton species were not necessarily under nominative concentration of nutrients, but were in reality under lower nutrient concentrations. This relation was species-specific and explained the lower diversity low in lower nutrient conditions. In the lattice model, we assumed slight differences in growth of ten species. We introduced "ecological time scale" that means it is long ecologically, but in the time scales the system is not in stable conditions. In this theoretical framework, we examined changes in the number of species. This growth rate depended on nutrient concentrations in the ecological time scale. Phytoplankton species grew more locally than it is generally considered. The local growth explained "the paradox of plankton". In higher nutrients, each species grew more globally, and some species became excluded. This means "the paradox of enrichment." Less
在本项目中,我们从实验和理论两方面研究了浮游植物的共存机制。(1)培养实验:采用浮游植物连续培养的方法,考察了不同营养物质浓度和培养基流速下浮游植物的共存与竞争。绿藻和蓝藻的竞争和排斥与供应培养基的营养浓度和流速有关。由于迄今为止还没有尝试过不同介质供应模式的实验,因此目前关于供应模式影响的结果是新的。(2)理论分析:考察了低流量连续养殖中的竞争、浮游生物悖论和富集悖论。同质环境中的优势种被认为是一个或几个。浮游植物的物种多样性通常很高,尽管水环境似乎是同质的。这种高度的多样性被称为“浮游生物的悖论”。在高营养条件下,多样性被认为是增加的。然而,在实地观察的多种水环境中,情况并非如此。这种沿着养分梯度的多样性变化被称为“富集悖论”。在低营养和低流量连续培养中,浮游植物种类并不一定处于指定的营养浓度下,而实际上处于较低的营养浓度下。这种关系是种特异性的,解释了低营养条件下的低多样性。在晶格模型中,我们假设10个物种的生长有细微差异。我们引入了“生态时间尺度”,这意味着它在生态上是长期的,但在时间尺度上,系统处于不稳定的状态。在这个理论框架下,我们研究了物种数量的变化。这种生长速率取决于生态时间尺度上的养分浓度。浮游植物种类在当地的生长比一般认为的要多。当地的生长解释了“浮游生物的悖论”。在高营养条件下,每个物种的生长更加全球化,一些物种被排除在外。这意味着“充实的悖论”。少
项目成果
期刊论文数量(51)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Rikusui no Jiten (Dictionary of Limnology) (in Japanese) (Ed. by The Japanese Society of Limnology)
Rikusui no Jiten(湖沼学词典)(日语)(日本湖沼学会编)
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Miyazaki;T.
- 通讯作者:T.
Takeya, K., Kuwata, A., Yoshida, M., Miyazaki, T.: "Effect of dilution rate on competitive interactions between the cyanobacterium Microcystis novacekii and the green alga Scenedesmus quadricauda in mixed chemostat cultures."Journal of Plankton Research.
Takeya, K.、Kuwata, A.、Yoshida, M.、Miyazaki, T.:“混合恒化培养物中稀释率对蓝藻微囊藻和绿藻四尾栅藻之间竞争性相互作用的影响。”《浮游生物研究杂志》。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Spatial coexistence of phytoplankton species in ecological timescale. J.Population Ecology.
生态时间尺度上浮游植物物种的空间共存。
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Miyazaki;T.;Tainaka;K.;Togashi;T.Suzuki;T.;Yoshimura;J.
- 通讯作者:J.
陸水の事典(三田村緒左武 他 編集)
水土百科全书(三田村小扎布等编)
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Togashi;T.;T.Miyazaki;J.Yoshimura;J.L.Bartelt;P.A.Cox;宮崎龍雄(分担執筆)
- 通讯作者:宮崎龍雄(分担執筆)
Effects of ammonium concentration and dilution on the competition between the Cyanobacterium Microcystsis novacekii and the green alga Scenedesmus quadricauda.
铵浓度和稀释度对蓝藻微囊藻与绿藻四尾栅藻竞争的影响。
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:Miyazaki;T.;Takeya;K.;Togashi;T.;Nakagiri;N.;Suzuki;T.;Yoshimura;J.
- 通讯作者:J.
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MIYAZAKI Tatsuo其他文献
MIYAZAKI Tatsuo的其他文献
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{{ truncateString('MIYAZAKI Tatsuo', 18)}}的其他基金
Development of the systematic synthetic method of human pseudo-oligosaccharides which have the carbasugar at the nonreducing end
非还原端卡巴糖人源拟低聚糖的系统合成方法的建立
- 批准号:
23750199 - 财政年份:2011
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Young Scientists (B)
Effects of temporal variations in environmental conditions on phytoplankton in lakes.
环境条件的时间变化对湖泊浮游植物的影响。
- 批准号:
60540419 - 财政年份:1985
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)