Studies of Microbial Foodwebs: I. Nutrition and Growth Rates of Phagotrophic Nanoflagellates in a Coastal Pelagic Foodweb

在远洋系统中，微生物食物网代表了 固定碳与后生动物食物链的主要联系， 与此同时，大部分浮游植物产量 由微生物呼吸。 最近的研究表明， 小于5 μ m的鞭毛虫是 微微型浮游生物，而稍大的鞭毛虫（5-10微米） 消耗小于5 μ m的自养和异养细胞， 大于10微米的鞭毛虫和纤毛虫捕食较小的 鞭毛虫也有初步数据表明， 某些噬食性鞭毛虫可能能够直接摄取 高分子量溶解有机物（DOM）。这 研究是检查营养的来源，包括DOM， 细菌和蓝藻，浮游植物和无色 鞭毛虫，以及增长率，噬 鞭毛虫在三个大小类的微型浮游生物（小于5 5-10 μ m，以及大于10 μ m）在开放的沃茨中， 盐沼河口

In pelagic systems, the microbial foodweb represents the primary link for fixed carbon to metazoan food chains, while at the same time a large fraction of phytoplankton production is respired by microbes. Recent studies suggest that phagotrophic flagellates less than 5 um are the dominant grazers of picoplankton, while slightly larger flagellates (5-10 um) consume both autotrophic and heterotrophic cells less than 5um, and flagellates and ciliates larger than 10 um prey on smaller flagellates. There is also preliminary data that suggest that some phagotrophic flagellates may be capable of direct uptake of high molecular weight dissolved organic matter (DOM). This research is to examine the sources of nutrition, including DOM, bacteria and cyanobacteria, phytoplankton and colorless flagellates, as well as the rates of growth, of phagotrophic flagellates in three size classes of nanoplankton (less than 5 um, 5-10 um, and greater than 10 um) in the open waters of a salt marsh estuary.