...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Deep-Sea Research >Planktonic food web structure at a coastal time-series site:Ⅰ. Partitioning of microbial abundances and carbon biomass
【24h】

Planktonic food web structure at a coastal time-series site:Ⅰ. Partitioning of microbial abundances and carbon biomass

机译：沿海时间序列站浮游生物食物网结构：Ⅰ。微生物丰度和碳生物量的分配

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

Biogeochemistry in marine plankton communities is strongly influenced by the activities of microbial species. Understanding the composition and dynamics of these assemblages is essential for modeling emergent community-level processes, yet few studies have examined all of the biological assemblages present in the plankton, and benchmark data of this sort from time-series studies are rare. Abundance and biomass of the entire microbial assemblage and mesozooplankton ( > 200 mu m) were determined vertically, monthly and seasonally over a 3-year period at a coastal time-series station in the San Pedro Basin off the southwestern coast of the USA. All compartments of the planktonic community were enumerated (viruses in the femtoplankton size range [0.02-0.2 mu m], bacteria + archaea and cyanobacteria in the picoplankton size range [0.2-2.0 mu m], phototrophic and heterotrophic protists in the nanoplanktonic [2-20 mu m] and microplanktonic [20-200 mu m] size ranges, and mesozooplankton [ > 200 mu m]. Carbon biomass of each category was estimated using standard conversion factors. Plankton abundances varied over seven orders of magnitude across all categories, and total carbon biomass averaged approximately 60 mu g C l(-1) in surface waters of the 890 m water column over the study period. Bacteria + archaea comprised the single largest component of biomass ( > 1/3 of the total), with the sum of phototrophic protistan biomass making up a similar proportion. Temporal variability at this subtropical station was not dramatic. Monthly depth-specific and depth-integrated biomass varied 2-fold at the station, while seasonal variances were generally < 50%. This study provides benchmark information for investigating long-term environmental forcing on the composition and dynamics of the microbes that dominate food web structure and function at this coastal observatory.
机译：海洋浮游生物群落中的生物地球化学受到微生物物种活动的强烈影响。了解这些组合物的组成和动力学对于建模新兴的社区级过程至关重要，但是很少有研究检查浮游生物中存在的所有生物组合物，并且这种来自时间序列研究的基准数据很少。在美国西南海岸圣佩德罗盆地的一个沿海时间序列站上，在三年的时间内，垂直，每月和季节性地确定了整个微生物群落和中生浮游生物（> 200微米）的丰度和生物量。列举了浮游生物的所有区室（浮游生物大小范围为[0.02-0.2μm]的病毒，微浮游生物大小范围为[0.2-2.0μm]的细菌+古细菌和蓝细菌，纳米浮游生物的光养和异养生物[2]。 -20微米]和微浮游生物[20-200微米]的大小范围，中生浮游生物[> 200微米]。使用标准转换因子估算每个类别的碳生物量。浮游生物的丰度在所有类别中变化了七个数量级，在研究期间，890 m水柱地表水中的总碳生物量平均约为60μg C l（-1），细菌+古细菌是生物量中最大的单一成分（>总量的1/3），光营养性原生质生物量的总和占相似比例，该亚热带站的时间变化不显着，站内月度特定深度和深度综合量的生物量变化了两倍，而季节性变化却很小e通常<50％。这项研究提供了基准信息，可用于调查长期环境强迫作用，这些微生物作用于该沿海天文台的食物网结构和功能的微生物的组成和动力学。

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