...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of oceanography >Seasonal variations in abundance, growth and mortality of heterotrophic bacteria in Kagoshima Bay
【24h】

Seasonal variations in abundance, growth and mortality of heterotrophic bacteria in Kagoshima Bay

机译：鹿儿岛湾异养细菌的丰度，生长和死亡率的季节性变化

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

摘要

Seasonal changes in abundance, growth and mortality of heterotrophic bacteria were investigated monthly from collections and dilution experiments in Kagoshima Bay, the southernmost of Japan. Bacteria occurred abundantly with considerable variation in the surface layers where chlorophyll a concentrations were high, whereas seasonal variations were obscure below 100 m. Especially, bacteria showed a decline of cell density toward summer when heterotrophic nano-flagellates increased their abundance. Seasonal and vertical variations in bacterial cell number during the study period were positively correlated with those of water temperature and pico-sized chlorophyll a concentration. Maximum growth and mortality rates showed positive correlations with water temperature but no positive relationships to size-fractionated chlorophyll a. Net increase rate (i.e. in situ rate if abundance changes) was negatively correlated with cell density of heterotrophic nano-flagellates. It is concluded that bacterial abundance is controlled by the resultant (i.e. net growth rate) of the balance between maximum growth and predatory mortality by heterotrophic nano-flagelllates which are both dependent on ambient temperature.
机译：根据日本最南端鹿儿岛湾的收集和稀释实验，每月调查异养细菌的丰度，生长和死亡率的季节性变化。在叶绿素a浓度较高的表层细菌大量存在且变化很大，而低于100 m的季节变化则模糊不清。特别是，当异养纳米鞭毛虫增加其丰度时，细菌在夏季表现出细胞密度的下降。研究期间细菌细胞数量的季节性和垂直变化与水温和皮克大小的叶绿素a浓度呈正相关。最大生长和死亡率与水温呈正相关，但与大小分级的叶绿素a无正相关。净增加率（即丰度改变时的原位率）与异养纳米鞭毛的细胞密度呈负相关。结论是，细菌的丰度由异养纳米鞭毛虫的最大生长和掠食性死亡率之间的平衡（即净生长速率）控制，这两者均取决于环境温度。

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