Temporal variation in phytoplankton composition related to water mass properties in the central part of Sagami Bay
Temporal variation in phytoplankton composition related to water mass properties in the central part of Sagami Bay
复制标题
DOI：
10.1007/s10872-008-0002-8
复制
发表时间：
2008-02-01
影响因子：
2.3
通讯作者：
Saino, Toshiro
中科院分区：
文献类型：
--
作者：
Hashihama, Fuminori;Horimoto, Naho;Saino, Toshiro
通过2002年6月至2004年5月的逐月观测，研究了相模湾中部水体性质和浮游植物色素组成的时间变化。使用高效液相色谱法（HPLC）从相对于表面的100%、20%和5%光深处定量了11种色素;然后通过CHEMTAX分析获得浮游植物群落的类别特异性组成。研究区在大部分观测期内都受到黑潮的影响。硅藻在所有样品中的平均贡献相对较低（29%），而鞭毛虫，主要是绿藻或隐藻，是相当高的（60%）。在整个观测期间，三个深度的浮游植物组成是均匀的，这表明浮游植物群落的垂直结构并没有随着时间的推移显着发展。观察到一个明显的时间模式：鞭毛虫占主导地位，在2002年夏季和2002-2003年和2003-2004年冬季，而硅藻占主导地位，在2003年夏季。这种模式与水体变化有关。2003年夏季，该群落受到沿岸水体的影响。虽然没有观察到明显的春季浮游植物水华，但在2004年春季观察到叶绿素a的微弱增加。海洋水色卫星数据表明，叶绿素a浓度的波动时间尺度远短于一个月发生在2003年春季，叶绿素a水平的上升是不连续的。这种波动可能与叶绿素a含量较低的黑潮海水的快速冲刷有关。
Temporal variations in water mass properties and the composition of phytoplankton pigments in the central part of Sagami Bay were investigated by monthly observations from June 2002 to May 2004. Eleven pigments were quantified using high-performance liquid chromatography (HPLC) from 100%, 20%, and 5% light depths relative to the surface; the class-specific composition of phytoplankton community was then obtained by CHEMTAX analysis. The study area was influenced by the Kuroshio water for most of the observation period. The mean contribution of diatoms in all samples was relatively low (29%), while that of flagellates, mainly chlorophytes or cryptophytes, was quite high (60%). The phytoplankton composition at the three depths was uniform throughout the observation period, indicating that the vertical structure of the phytoplankton community did not develop significantly over time. A distinct temporal pattern was observed: flagellates dominated during the summer of 2002 and the winters of 2002-2003 and 2003-2004, while diatoms dominated during the summer of 2003. This pattern was associated with water mass changes. The community in the summer of 2003 was influenced by coastal water. While no distinct spring bloom of phytoplankton was observed, a weak increase in chlorophyll a was observed during the spring of 2004. Ocean color satellite data showed that fluctuations in chlorophyll a concentrations at time scales much shorter than a month occurred during the spring of 2003 and that the elevations in chlorophyll a levels were not continuous. The fluctuations were probably associated with rapid flushing by the Kuroshio water, which has low chlorophyll a content.