摘要
对 4个海域的塔玛亚历山大藻 (Alexandriumtamarense)和链状亚历山大藻 (A .catenella)休眠孢囊的分布及萌发进行了研究 .结果表明 ,厦门港仅在X1和X2站位有分布 ,且密度很小 (0 .4个·g-1) ;广西只在G2站位有发现 ,密度较少 (2 .5个·g-1泥样 ) .闽江口有 3个站位有分布 ,M4站位的 4～ 6cm层密度最大 ,达到 6个·g-1泥样 ;长江口的孢囊分布广、密度大 ,DG 2 6站位的 8～ 10cm层孢囊密度达到了 2 3.2个·g-1泥样 .孢囊的分布与沉积物底质类型、沉积速率、海流都有一定的关系 .光照对孢囊萌发没有影响 ,温度升高导致萌发率和存活率均增大 ,而萌发时间缩短 ;在低氧条件下 (0 .0 1mgO2 L-1) ,孢囊萌发率为 0 .亚历山大藻孢囊在合适的环境条件下终年都会萌发 .
Studies on the distribution and germination of Alexandrium sp.(A. tamarense+A. catenella) cysts in coastal areas of Southeast China showed that the cysts were only found at X1 and X2 of Xiamen Harbor, whose density was quite low (0.4 ind·g -1). In Guangxi,the cysts were found at G2 station, with a density of 2.5 ind·g -1. There were cysts at three stations at Minjiang River estuary. The density reaches maximum value at 4～6cm sediment of M4 station, up to 6 ind·g -1.In Changjiang River estuary,the cysts distributed widely and had the largest density, up to 23.2 ind·g -1 at 8～10cm sediment of DG-26 station. The distribution of Alexandrium sp.cysts was relevant to sediment type, sedimentation rate and current. Light had no effect on germination. With increasing temperature, germination and survival rates also increased, while the germination time decreased. Anoxia (0.01mg O 2·L -1 ) inhibited germination completely.Alexandrium sp. cysts could germinate throughout the year under favorable conditions.
出处
《应用生态学报》
CAS
CSCD
2003年第7期1147-1150,共4页
Chinese Journal of Applied Ecology
基金
国家重点基础研究发展规划项目 ( 2 0 0 1CB40 970 2 )
福建省自然科学基金重大资助项目 ( 2 0 0 1F0 0 1) .
关键词
东南沿海
亚历山大藻
孢囊
分布
萌发
Coastal areas of Southeast China, Alexandrium sp., Cysts, Distribution, Germination
