• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Estuarine and Coastal Sciences Association >Short-term variations in the physiological state of phytoplankton in a shallow temperate estuary
【24h】

Short-term variations in the physiological state of phytoplankton in a shallow temperate estuary

机译：浅水河口植物植物植物生理状态的短期变化

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

摘要

Short-term changes in the photosynthetic carbon metabolism and physiological state of phytoplankton were studied over a summer fortnight-long period in the Urdaibai estuary (Bay of Biscay) and related to observed environmental patterns. Day-to-day variability in the hydrographical and biological features of the estuary during the study period was due to changes in meteorological and tidal conditions. Phytoplankton biomass and primary production increased with the improvement of weather, i.e., light conditions, during neap tides. Thus a mixed bloom of cryptophyceans, Euglena sp., and the dinoflagellate Peridinium foliaceum developed in the middle and upper estuary. Photosynthetic responses of phytoplankton were related to the time-scale of changes in light regime. Allocation of photosynthate to major macromolecular classes (LMWM, lipid, polysaccharide, and protein), like phytoplankton biomass and primary production, showed strong spatio-temporal variability. High carbon fixation into low molecular weight metabolites was associated with growth limitation by low light. The relative incorporation of photosynthetic carbon into proteins increased at the beginning of the phytoplankton bloom but overall, it was rather constant. However, carbon allocation into storage products such us lipid or polysaccharide increased when carbon and energy produced under optimal growth conditions exceeded what could be assimilated into protein. These patterns are explained by both spatio-temporal changes in the environmental conditions and species-specific differences. In general, daily variability appeared to the more important than diurnal periodicity in the physiological responses of phytoplankton. Results from this study show that phytoplankton photosynthesis and carbon metabolism are simultaneously affected by biotic and abiotic factors, although short-term light fluctuations may have a major influence on the physiological state of phytoplankton in the Urdaibai estuary.
机译：在Urdaibai河口（Biscay湾）的夏季重点长时间，研究了光合碳代谢和浮游生物的生理状态的短期变化，并与观察到的环境模式相关。研究期间河口水文和生物学特征的日常变异是由于气象和潮气条件的变化。在NeAP潮汐期间，浮游植物生物量和初级产量随着天气的改善而增加，即光照条件。因此，Cryptophyceans，Euglena sp的混合盛开，和甲藻氨酸盐果蝇在中部和上部开发。 Phytoplankton的光合响应与轻质制度变化的时间范围有关。像浮游植物生物量和初级生产的光合素到主要大分子类（LMWM，脂质，多糖和蛋白质）的分配表现出强烈的时空变异性。低分子量代谢物的高碳固定与低光的生长限制有关。光合碳进入蛋白质的相对掺入浮游植物绽放的开始时增加，但总体而言，它相当恒定。然而，当在最佳生长条件下产生的碳和能量超过蛋白质中产生的碳和能量时，碳分配在储存产品中增加了美国脂质或多糖。这些模式是通过环境条件和特异性特异性差异的时空变化来解释。通常，日常变异性似乎比浮游植物的生理反应中的日期周期更重要。本研究结果表明，浮游植物光合作用和碳代谢同时受到生物和非生物因素的影响，尽管短期光波波动可能对乌尔达比亚河口植物植物的生理状态产生重大影响。

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