PLANKTONIC CILIATED PROTOZOA - THEIR DISTRIBUTION AND RELATIONSHIP TO ENVIRONMENTAL VARIABLES IN A MARINE COASTAL ECOSYSTEM
PLANKTONIC CILIATED PROTOZOA - THEIR DISTRIBUTION AND RELATIONSHIP TO ENVIRONMENTAL VARIABLES IN A MARINE COASTAL ECOSYSTEM
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DOI：
10.1093/plankt/17.4.659
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发表时间：
1995-04-01
影响因子：
2.1
通讯作者：
HALL, JA
中科院分区：
文献类型：
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作者：
JAMES, MR;HALL, JA
测量了新西兰南岛西海岸外北方和南方的浮游纤毛虫原生动物的空间分布、物理变量和潜在的食物项目，以研究哪些变量在构建纤毛虫群落中是重要的。纤毛虫占浮游动物总生物量的30%。纤毛虫丰度是最大的北方样带上的海岸55公里内，但在南部样带的最大丰度是靠近近岸和离岸的大陆架站。纤毛虫群落以小型寡毛类为主，丰度（114-1139 1（-1））与其他贫营养海洋环境相当。密度跃层的深度对纤毛虫的垂直分布有重要影响，这与浮游植物生物量和picophytoplankton丰度的配置文件密切相关，但不是初级生产力。研究结果表明，物理因素比生物因素对原生动物纤毛虫分布的影响更大。深层混合层阻止了深层叶绿素a和纤毛虫的形成。微型浮游动物的研究很少纳入picophytoplankton分布，但小纤毛虫和picophytoplankton的重要性表明，这些群体可能发挥了关键作用，介导有机物质转移到更高的营养水平，在这个海洋沿海生态系统。
The spatial distribution of planktonic ciliated protozoa, physical variables and potential food items were measured at northern and southern sites off the west coast of the South Island, New Zealand, to examine which variables were important in structuring the ciliate community. Ciliates contributed 30% of total zooplankton biomass. Ciliate abundance was greatest within 55 km of the coast on the northern transect, but on the southern transect the greatest abundance was close inshore and at the stations offshore of the continental shelf. The ciliate community was dominated by small oligotrichs and abundance (114-1139 1(-1)) was comparable with other oligotrophic marine environments. The depth of the pycnocline had a major influence on the vertical distribution of ciliates, which were closely correlated with profiles of phytoplankton biomass and picophytoplankton abundance, but not primary production. The results of this study suggest that physical factors were more important than biotic factors in influencing the distribution of protozoan ciliates. The deep mixed layer prevented the formation of deep chlorophyll a or ciliate maxima. Few studies of microzooplankton have incorporated picophytoplankton distribution, but the importance of small ciliates and picophytoplankton suggests that these groups may play a pivotal role in mediating the transfer of organic matter to higher trophic levels in this marine coastal ecosystem.