• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Diatom Research >Swarm-like migratory behaviour in the laboratory of a pennate diatom isolated from North Sea sediments
【24h】

Swarm-like migratory behaviour in the laboratory of a pennate diatom isolated from North Sea sediments

机译：从北海沉积物中分离出的一个羽状硅藻实验室中的群状迁徙行为

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

An unidentified Navicula species was isolated from the surface sediments in two different localities of the German North Sea shore in 1997. Cells were maintained in culture on agar plates under various environmental conditions. The diatom cells showed a previously undescribed migratory behaviour, moving synchronically from the starting point towards the periphery of the Petri dish, resulting in a swarm-like migration and giving rise to ring-like banding patterns. This mode of movement takes place horizontally on a rather small scale (cm) and usually within days; it might represent, in addition to dispersal by water, another way of colonizing new areas of its natural environment. Ring formation occurred only when diatom cells were cultured on agar plates either in continuous white light or in a 14: 10 h light: dark regime at an irradiance between 5 and 10 mu mol photons m(-2) s(-1), and not when the agar plates were kept in the dark. Salinity above or beyond 34 psu, as well as a lack of nitrate or phosphate had a negative impact on this migratory behaviour and resulted in reduced numbers of rings or lack of migration. This migratory pattern was recorded repeatedly from October to the end of March, but ceased to occur afterwards.
机译：1997年从德国北海沿岸两个不同地点的表面沉积物中分离出一种未鉴定的Navicula物种。将细胞在各种环境条件下的琼脂平板上培养。硅藻细胞显示出以前未曾描述的迁徙行为，从培养皿的起点向其外围同步移动，从而导致了蜂群状的迁移并产生了环状的带状图案。这种运动方式是在很小的范围内（通常在几天之内）水平发生的。除了通过水扩散外，它还可能是在其自然环境新区域定居的另一种方式。仅当在连续白光或14:10 h光：暗条件下在5至10μmol摩尔光子m（-2）s（-1）的光照下在琼脂板上培养硅藻细胞时，才会发生环形成。不是将琼脂平板放在黑暗中。盐度高于或超过34 psu，以及缺少硝酸盐或磷酸盐对这种迁徙行为产生负面影响，并导致环数减少或缺乏迁移。从10月到3月底，反复记录了这种迁徙方式，但此后就不再出现了。

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