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

Stoecker 9819670水华形成甲藻的混合营养：C、N和P的相互作用混合营养，利用交替的营养模式，是水华形成、光合甲藻生理生态学的一个重要但知之甚少的方面。全球范围内有害藻华的发生频率似乎越来越高，对整个生态系统产生了潜在影响。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。许多赤潮甲藻吃。光合作用、摄食、无机和有机营养物的吸收之间的复杂相互作用可能提供营养灵活性，使甲藻在富营养但相对于资源高度可变的环境中优于其他浮游植物。Gymatinium galatheanum;在Chespeake Bay地区也被称为Gyrodinium或Gymatinium estuariale），两种赤潮甲藻。初步证据表明，摄食是由无机营养盐的限制在赤潮甲藻刺激，摄食与光合碳代谢相互作用。本文将在实验室对赤潮甲藻的生理生态学进行研究。

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.