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首页> 外文期刊>Estuarine Coastal and Shelf Science >The ability of the branchiopod, Artemia salina, to graze upon harmful algal blooms caused by Alexandrium fundyense, Aureococcus anophagefferens, and Cochlodinium polykrikoides
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The ability of the branchiopod, Artemia salina, to graze upon harmful algal blooms caused by Alexandrium fundyense, Aureococcus anophagefferens, and Cochlodinium polykrikoides

机译：叉足类（卤虫）盐藻对亚历山大藻，菜豆和链球菌引起的有害藻华放牧的能力

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We present experiments that examined the grazing and survivorship of zooplankton native (Acartia tonsa) and non-native (Artemia salina) to NY (USA) estuaries when exposed to blooms and cultures of the three harmful algae native to NY, Alexandrium fundyense, Aureococcus anophagefferens (strains CCMP 1850 and CCMP 1984) and Cochlodinium polykrikoides. During experiments with cultures of A. anophagefferens, clearance rates (CR) of A salina were significantly greater than those of A tonsa for both algal strains examined. A. salina fed on cultures of C. polykrikoides at higher rates than all phyto plankton species examined, including the control diet (Rhodomonas salina), and faster than rates of A tonsa fed C. polykrikoides. During experiments with A fundyense, A. salina actively grazed all cell concentrations (250-1500 cells ml~(-1)) while A. tonsa did not feed at any concentration. Percent mortality of A salina and A tonsa fed A. fundyense for 48 h were 43 ± 7.7% and 72 ± 7.8%, respectively, percentages significantly higher than those of individuals fed all other algal diets. During 25 field experiments using natural blooms of the three HAB species performed across six NY estuaries, A salina significantly (p ＜ 0.05) reduced cell densities of A. anophagefferens, C. polykrikoides, and A. fundyense relative to the control treatments in all but one experiment. The sum of these findings demonstrates that a failure to graze these HABs by the indigenous copepod, A. tonsa, may permit blooms to occur. In addition, the ability of A salina to graze these HABs at densities that were inhibitory to A tonsa suggests that A salina could, in some circumstances, be considered as a part of mitigation strategy for these events.
机译：我们目前的实验检查了暴露于纽约州三种有害藻类，亚历山大藻，大肠球菌和藻类的浮游生物和藻类的放牧和浮游后，它们对纽约州（美国）河口的浮游动物（Acartiatonsa）和非本地动物（卤虫）的放牧和存活。 （菌株CCMP 1850和CCMP 1984）和Cochlodinium polykrikoides。在用按蚊按蚊培养的实验中，对于两种藻类菌株，盐沼的清除率（CR）均明显高于扁桃体的清除率。饲喂多角藻的培养物的拟南芥比所有检查的浮游植物物种（包括对照饮食（Rhodomonas salina））的生长速率要高，并且比多氏藻类的多囊藻的生长速率要快。在使用A轮菌的实验中，盐沼活跃地放牧了所有细胞浓度（250-1500细胞ml〜（-1）），而扁桃体不以任何浓度进食。饲喂A.fundyense的A盐沼和A tonsa在48小时内的死亡率分别为43±7.7％和72±7.8％，该百分比显着高于饲喂所有其他藻类饮食的个体。在25个野外实验中，使用三个HAB物种的自然花样在六个纽约河口进行了实验，相对于对照处理，除其他对照组外，盐沼显着（p ＜0.05）降低了嗜藻按蚊，多角梭状芽胞杆菌和沙门氏菌的细胞密度。一个实验。这些发现的总和表明，土著co足类动物A.tonsa无法放牧这些HAB可能会导致开花。此外，A盐沼以抑制A tonsa的密度放牧这些HAB的能力表明，在某些情况下，A盐沼可被视为缓解这些事件的策略的一部分。

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