中文摘要：

这研究的主要目的是调查 dinoflagellate Alexandrium 种类的有毒的效果，在在实验室的 cladocera Moina mongolica 上。Alexandrium 种类的十紧张包括 Alexandrium tamarense (AT-6， ATHK， ATCI02， ATCI03 和 AT5-1 ) ，一。catenella (ACDH ) ，一。仿射(AC-1 和 AS-1 ) ，一。lusitanicum 和 A。minutum 被测试。结果显示出那 A。tamarense (ATHK， ATCI02 和 AT5-1 ) 和 A。仿射(AC-1 和 AS-1 ) ，然而并非一。tamarense (AT-6 和 ATCI02 ) ，一。catenella (ACDH ) ，一。lusitanicum 和 A。minutum 在 M 的幸存上有显著地否定的效果。mongolica；当 respecyively 为 7 d 在 3 000 cells/cm3 的密度暴露了到 Alexandrium 种类的这十紧张时。M。mongolica 能在 A 上喂。tamarense (AT-6， ATHK， ATCI02， ATCI03 和 AT5-1 ) ，一。catenella，一。lusitanicum 和 A。minutum，而是展出很少或没有在 A 上放牧。仿射(AC-1 和 AS-1 ) ，基于在在到为 1 和 12 h 的水藻的暴露以后的内脏颜料的变化。A。仿射的 AC-1，它在 M 的幸存上有最强壮的毒性。mongolica，被选择进一步在 M 上学习否定效果。mongolica。结果出现了 A 的效果。M 的幸存上的仿射的 AC-1。mongolica 在一天上是密度依赖者，和它的致命的效果，二天、三天的旧 M。mongolica 与增加年龄被加重；整个海藻的文化，重新推迟的海藻的房间，房间碎片和房间在 M 的幸存上满足所有有的不利影响。mongolica。而且， M 的少年数字和寿命时间。当他们在 A 是有教养的时， mongolica 显著地被减少。10 和 50 cells/cm3 的仿射的 AC-1，与 3 结合了？？

英文摘要：

The main objective of this study was to investigate toxic effects of the dinoflagellate Alexandrium species, on cladocera Moina mongolica in the laboratory. Ten strains of Alexandrium species, including Alexandrium tamarense （AT-6, ATHK, ATCI02, ATCI03 and AT5-1）, A. catenella （ACDH）, A. affine （AC-1 and AS-1）, A. lusitanicum and A A. tamarense （ATHK, ATCI02 and AT5-1） and A minutum were tested. The results showed that affine （AC-1 and AS-1）, but not A. tamarense （AT-6 and ATCI02）, A. catenella （ACDH）, A. lusitanicum and A. minutum had significantly negative effects on the survival of M. mongoliea; when exposed to these ten strains of Alexandrium species in densities of 3 000 cells/cm^3 for 7 d, respecyively. M. mongolica could feed on A. tamarense （AT-6, ATHK, ATCI02, ATCI03 and AT5-1）, A. eatenella, A. lusitanieum and A. minutum, but exhibited little or no grazing on A. affine （AC-1 and AS-1）, based on the changes in gut pigment af- ter exposure to alga for 1 and 12 h. A. affine AC-1, which had the strongest toxicity on the survival of M. mongolica, was chosen to further study the negative effects on M. mongolica. The results showed that the effect of A. affine AC-1 on the survival of M. mongolica was density-dependent, and its lethal effects on one-day, two-day and three-day old M. mongolica were exacerbated with increasing age; The whole algal culture, re-suspended algal cells, cell fragments and cell contents all had adverse impacts on the survival of M. mongolica. Moreover, both juvenile numbers and life-span time of M. mongolica were decreased significantly when they were cultured in A. affine AC-1 of 10 and 50 cells/cm^3, combined with 3×10^6 cells/cm^3 of Chlorella spp., respectively. As a non-PSP producer, A. affine may produce other toxins, responsible for the strong negative effects on M. mongolica.