...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Scientia Marina >Seasonal evolution of cholorophyll-a and cyanobacteria (Prochlorococcus and Synechococcus) on the northeast continental shelf of the Gulf of Cádiz: relation to thermohaline and nutrients fields
【24h】

Seasonal evolution of cholorophyll-a and cyanobacteria (Prochlorococcus and Synechococcus) on the northeast continental shelf of the Gulf of Cádiz: relation to thermohaline and nutrients fields

机译：加的斯湾东北部大陆架上的叶绿素-a和蓝细菌（原绿球菌和合成球菌）的季节性演变：与热盐和养分场的关系

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The seasonal evolution of nutrients, chlorophyll-a (chl-a) and cyanobacteria (Synechococcus and Prochlorococcus) on the northeast continental shelf of the Gulf of Cádiz was observed during four cruises in summer and autumn 2006 and winter and spring2007. Samples were collected to determine the distribution of chl-a and cyanobacteria abundance and to analyse their coupling with thermohaline and chemical properties in the gulf region. Surface nutrient distributions showed clear seasonal variability.Maximum levels were recorded for the entire study region during winter due to winter mixing and the strong influence of the Guadalquivir River and Bay of Cádiz outflow. Maximum chl-a levels were reached during spring for the entire region and for the entire water column. Minimum values of chl-a were observed during summer, under prevailing oligotrophic conditions, and winter when in spite of relatively high nutrient concentrations, phytoplankton growth was probably light-limited. The distribution of both cyanobacteria populations also varied seasonally in association with the oceanographic conditions. Prochlorococcus maximum cell abundance was observed at the sea surface during the four cruises, except in the northern region during summer. However, Synechococcus showed a maximum concentration at the sea surface in autumn and winter and at the subsurface chlorophyll maximum in autumn and spring.
机译：在2006年夏季和秋季以及冬季和2007年春季的四次航行中，观察到了加的斯湾东北大陆架养分，叶绿素a（chl-a）和蓝细菌（Synechococcus和Prochlorococcus）的季节性变化。收集样品以确定chl-a和蓝细菌丰度的分布，并分析它们与海湾地区热盐和化学性质的耦合。表面养分分布表现出明显的季节性变化。由于冬季混合以及瓜达尔基维尔河和加的斯湾流出物的强烈影响，整个研究区域在冬季记录了最高水平。在春季，整个区域和整个水柱都达到最大的chl-a水平。在夏季，在贫营养状况普遍的情况下，观察到了chl-a的最小值，而在冬季，尽管养分含量相对较高，但浮游植物的生长可能受到光的限制。两个蓝细菌种群的分布也随海洋条件而季节性变化。在四次航行中，除了夏季的北部地区，在海面上都观察到了原球菌的最大细胞丰度。但是，深秋球菌在秋季和冬季在海面显示最大浓度，而在秋季和春季在海面的叶绿素最大浓度显示。

著录项

相似文献

  • 外文文献
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