Cyst formation: an important mechanism for the termination of Scrippsiella trochoidea (Dinophyceae) bloom
Cyst formation: an important mechanism for the termination of Scrippsiella trochoidea (Dinophyceae) bloom
复制标题
包囊形成：终止 Scrippsiella trochoidea（甲藻纲）水华的重要机制
DOI：
10.1093/plankt/fbm008
复制
发表时间：
2007-02
影响因子：
2.1
通讯作者：
Yang, Yu-Feng
中科院分区：
文献类型：
--
作者：
Wang, Zhao-Hui;Qi, Yu-Zao;Yang, Yu-Feng
1999年12月至2001年1月，在南海中国大亚湾进行了沉积物捕集研究，以探讨锥状斯氏藻包裹体与种群动态的关系。2 0 0 0年8~9月出现了锥虫的密集水华，最大细胞数为3.1 8×10 4个细胞毫升−1。在本研究中，我们观察到两种形态的囊肿，一种是钙化的厚壁(钙化囊)，另一种是无明显钙化的囊壁(非钙化囊)。并对这两种类型的包囊的形态和解剖特征进行了研究。钙化包囊最大值为3.0 5×10 5个，非钙化包囊最大值为1.5 4×10 7个，与营养细胞丰度的最大值一致。在水华期间，包囊导致−-2营养细胞从水柱转移到海底的细胞总数为2.2 4~4.49×10 8个，造成水华种群的大量损失。在表层沉积物中也发现了高度聚集的锥形链球菌包囊。由于水华后的高效率包裹体作为未来营养种群的底栖生物蓄水池，加上休眠期短(15-26天)和发芽率高(50-90%)，表层沉积物中的这种丰富的种子床可能解释了大亚湾三角帆水华反复发生的原因。
A sediment trap study was conducted at Daya Bay, South China Sea, to investigate the relationships between encystment and population dynamics of Scrippsiella trochoidea from December 1999 to January 2001. A dense bloom of S. trochoidea occurred during the study period from August to September 2000, with the maximum cell number of 3.18 × 10 4 cells mL −1 . Two morphotypes of cysts, one with a thick calcareous wall (calcified cyst) and another without the obvious calcareous cover (non-calcified cyst), were observed during this investigation. The morphological and excystment characteristics of these two cyst types were studied as well. Mass encystments of S. trochoidea, with the maximum of 3.05 × 10 5 cysts m −2 d −1 for calcified cyst, and 1.54 × 10 7 cysts m −2 d −1 for non-calcified cyst, coincided with the maximum abundance of the vegetative cells. Encystment caused the transfer of a total of 2.24-4.49 × 10 8 cells m −2 vegetative cells from the water column to the sea bottom during the bloom and resulted in a considerable loss of the bloom population. High assemblages of cysts of S. trochoidea were detected in the surface sediments as well. This rich ‘seed bed’ in the surface sediments caused by the high efficiency of encystment after blooms acting as a benthic reservoir for future vegetative population, together with the short dormant period (15-26 days) and high germination rate (50-90%), may explain the repeated occurrence of S. trochoidea blooms in Daya Bay.
登录
查看更多内容
影响因子：
1.5
作者：
Zhaohui Wang;K. Matsuoka;Yu-zao Qi;Jufang Chen;Songhui Lu
通讯作者：
Zhaohui Wang;K. Matsuoka;Yu-zao Qi;Jufang Chen;Songhui Lu
影响因子：
2.1
作者：
M. Ellegaard;D. Kulis;D. Anderson
通讯作者：
M. Ellegaard;D. Kulis;D. Anderson
影响因子：
2.9
作者：
Ho-Dong Park;H. Hayashi
通讯作者：
Ho-Dong Park;H. Hayashi
DOI：
--
发表时间：
2006
期刊：
Ecologic Science
影响因子：
--
作者：
Zhang Yu
通讯作者：
Zhang Yu
DOI：
10.1111/j.1439-0485.2004.00035.x
发表时间：
2004-12
期刊：
Marine Ecology
影响因子：
--
作者：
Zhaohui Wang;K. Matsuoka;Yu-zao Qi;Jufang Chen
通讯作者：
Zhaohui Wang;K. Matsuoka;Yu-zao Qi;Jufang Chen