权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Mixotrophy in Bloom-Forming Dinoflagellates: Interaction of C, N and P

开花甲藻的混合营养：C、N 和 P 的相互作用

基本信息

批准号：
9819670
负责人：
Diane Stoecker
金额：
$ 29.02万
依托单位：
University of Maryland Center for Environmental Sciences
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-03-15 至 2003-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819670&HistoricalAwards=false
关键词：
Mixotrophy Bloom Forming Dinoflagellates Interaction

项目摘要

Stoecker 9819670Mixotrophy in Bloom-forming Dinoflagellates: Interactions of C, N and P Mixotrophy, the utilization of alternate modes of nutrition, is an important but poorly understood aspect of the physiological ecology of bloom-forming, photosynthetic dinoflagellates. Harmful algal blooms appear to increasing in frequency world-wide with potential effects on whole ecosystems. One common attribute shared by most harmful algal taxa is mixotrophic tendencies. Many red-tide dinoflagellates eat. Complex interactions between photosynthesis, feeding, and uptake of inorganic and organic nutrients may provide the nutritional flexibility that gives dinoflagellates advantages over other phytoplankton in eutrophic, but highly variable environments with respect to resources.As part of an ongoing project, phagotrophic mixotrophy is being investigated in Prorocentrum minimum and Gyrodinium galatheanum (syn., Gymnodinium galatheanum; also has been called Gyrodinium or Gymnodinium estuariale in Chespeake Bay region), two red-tide dinoflagellates. Preliminary evidence indicates that feeding is stimulated by inorganic nutrient limitation in red-tide dinoflagellates, and that feeding interacts with photosynthetic carbon metabolism. These aspects of the physiological ecology of red-tide dinoflagellates will be experimentally investigated in the laboratory.

形成开花的鞭毛藻的混合营养：C、N和P的相互作用，即对营养交替模式的利用，是形成开花的光合鞭毛藻生理生态学的一个重要但鲜为人知的方面。有害藻华在世界范围内的频率似乎在增加，对整个生态系统有潜在的影响。大多数有害藻类类群共有的一个共同属性是混合营养倾向。许多赤潮鞭毛藻进食。光合作用、取食以及无机和有机营养物的摄取之间的复杂相互作用可能提供了营养灵活性，使鞭毛藻在富营养化但资源高度可变的环境中优于其他浮游植物。作为一项正在进行的项目的一部分，正在对两种红潮鞭毛藻——最小原藻和galatheanum（又称Gymnodinium galatheanum；在切斯皮克湾地区也被称为Gyrodinium或Gymnodinium estuariale）进行吞噬性混合营养研究。初步证据表明，赤潮鞭毛藻的摄食受到无机营养限制的刺激，并与光合碳代谢相互作用。赤潮鞭毛藻生理生态学的这些方面将在实验室进行实验研究。