• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Mesoscale distribution of protozooplankton communities and their herbivory in the western Scotia Sea of the Southern Ocean during the austral spring
【24h】

Mesoscale distribution of protozooplankton communities and their herbivory in the western Scotia Sea of the Southern Ocean during the austral spring

机译：南极春季春季斯科舍海西部原生动物浮游动物群落的中尺度分布及其草食性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The distribution and structure of protozooplankton communities and the impact of their grazing on phyto-plankton during spring were studied as part of the 15th Korean Antarctic Research Program in the western Scotia Sea. Water mass identities were determined based on physicochemical properties, with four regions identified: north of the Polar Front (NPF), Polar Front (PF), South of the Polar Front (SPF), and the South Antarctic Circumpolar Current region (SACCr). Physicochemical characteristics of the water column significantly influenced the distribution and structure of phytoplankton and protozooplankton communities. The NPF was characterized by relatively warmer water, low nutrient, low chlorophyll a (chla), and pico-sized phytoplankton predominance (i.e., cyanobacteria and eukaryotic picoflagellates). Nano-sized phytoplankton such as Phaeocystis antarctica and Cryptomonas sp. dominated in the SACCr with its colder water, higher nutrient, and higher chla concentrations. Despite the relatively slightly high chla concentration in the PF, micro-sized phytoplankton, especially diatoms, were abundant. Large changes in protozooplankton biomass and community were observed between water masses. Heterotrophic nanoflagellates including choanoflagellates and nanociliates declined in abundance from the NPF to SACCr, whereas heterotrophic dinoflagellates (HDF) and microciliates increased in abundance from the NPF to SACCr. Ciliates declined in importance from the NPF to SACCr, accounting for over 50% of the total protozooplankton biomass in the NPF. In contrast, HDF comprised over 50% of the total in the SPF, PF, and SACCr. The depth-integrated protozooplankton biomass ranged from 443.2 to 934.0 mg C m~(-2), and was highest in the PF and lowest in the NPF. These relationships suggest that the spatial variation in the community and biomass of protozooplankton appears to be primarily governed by the community and size structure of phytoplankton. Protozooplankton consumed an average of 76.9% of daily phytoplankton production. Therefore, protozooplankton were the major consumers of the diverse phytoplankton community, and protozooplankton grazing is one of the most important loss processes affecting phytoplankton biomass and composition during spring in the western Scotia Sea.
机译：作为第15届斯科舍海南朝鲜南极研究计划的一部分，研究了春季浮游动物群落的分布，结构以及它们对春季浮游植物的影响。根据理化性质确定水的质量，并确定了四个区域：极地前缘（NPF）北部，极地前缘（PF），极地前缘南部（SPF）和南极洲极地洋流南区（SACCr）。水柱的理化特性极大地影响了浮游植物和浮游动物群落的分布和结构。 NPF的特征是相对温暖的水，低养分，低叶绿素a（chla）和微微浮游植物优势（即蓝藻和真核微鞭毛虫）。纳米浮游植物，如南极藻类和隐孢子虫。 SACCr中的冷水，较高的养分和较高的chla浓度占主导地位。尽管PF中的chla浓度相对较高，但微型浮游植物（尤其是硅藻）丰富。在水体之间观察到原藻浮游生物量和群落的大变化。从NPF到SACCr的异养纳米鞭毛虫（包括鞭毛鞭毛虫和纳米纤毛虫）的丰度下降，而从NPF到SACCr的异养藻鞭毛虫（HDF）和微纤毛虫的丰度增加。从NPF到SACCr，纤毛虫的重要性下降，占NPF中原藻类生物总量的50％以上。相反，HDF在SPF，PF和SACCr中占总数的50％以上。深度整合的原生动物浮游生物量范围为443.2〜934.0 mg C m〜（-2），其中PF最高，NPF最低。这些关系表明，原浮游生物群落和生物量的空间变化似乎主要受浮游植物的群落和大小结构支配。原生浮游动物平均每天消耗浮游植物76.9％。因此，原生藻浮游生物是多样化浮游植物群落的主要消费者，而原生藻浮游生物是斯科舍海西部春季影响浮游植物生物量和组成的最重要损失过程之一。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号