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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Chattonella marina bloom in the coastal sea off Mahe, Southwest India.
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Chattonella marina bloom in the coastal sea off Mahe, Southwest India.

机译:Chattonella小游艇船坞绽放在印度西南部马埃岛的沿海海域。

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As part of harmful algal bloom (HAB) monitoring programme of the ministry of Earth Sciences, Government of India, seasonal samplings have been carried out from selected coastal and estuarine areas along the Kerala coast since 2006. During 27 October to 1 November 2011, a massive bloom of marine raphidophyte, Chattonella marina, was observed in the coastal sea off Mahe. On 27 October, the bloom was monospecific with only Chattonella marina. However, in the following days, i.e. 29 and 1 November, a number of diatom species along with some dinoflagellates also appeared. On 1 November, the bloom intensity had marginally decreased and species such as Coscinodiscus asteromphalus (48 cells/1), C. radiatus (18), Cylindrotheca gracilis (26), Pleurosigma estuarii (18), Nitzschia closterium [Cylindrotheca closterium] (10), Hantzchia marina (8), Biddulphia aurita [Odontella aurita] (12), Chaetoceros decipiens (12), Campylodiscus eccelsianus (8) and a very less number of dinoflagellates such as Prorocentrum gracile and Ceratium furca [Neoceratium furca] contributed to the total standing crop. Introduction of the above species along with decrease in Chattonella marina cell abundance signifies that the bloom is in the decline phase. Mortality of a few fishes was onserved on 27 October, in the region of 1 km inside the estuary. Pearl spot (Etroplus suratensis) and mullet (Mugil cephalus) were the main victims. It was found that the gills were fully choked with algal cells and the consequent death might have occurred due to suffocation.
机译:作为印度政府地球科学部有害藻华(HAB)监测计划的一部分,自2006年以来,已从喀拉拉邦沿海的部分沿海和河口地区进行了季节性采样。2011年10月27日至11月1日,在马埃岛附近的沿海海域,观察到了巨大的海洋蝶形藻(Chantonella marina)盛开。 10月27日,只在Chattonella滨海地区发生了绽放。然而,在随后的几天,即11月29日和11月1日,也出现了许多硅藻物种以及一些鞭毛鞭毛体。 11月1日,开花强度略有下降,物种如Coscinodiscus asteromphalus(48细胞/ 1),C。radiatus(18),Cylindrotheca gracilis(26),Pleurosigma estuarii(18),Nitzschia closterium [Cylindrotheca closterium](10) ),汉茨基亚码头(8),金合欢(Odontella aurita)(12),Chaetoceros decipiens(12),喜树弯曲杆菌(Campylodiscus eccelsianus)(8)以及少量鞭毛虫,如早熟禾(Prorocentrum gracile)和小角藜(Ceratium furca)[Neoceratium furca]。作物总产量。引入上述物种,加上沙通氏菌海滨细胞丰度下降,表明开花处于下降阶段。 10月27日,在河口内1 km的区域内,一些鱼类的死亡率得以保持。珍珠斑(Etroplus suratensis)和鱼(Mugil cephalus)是主要受害者。发现the被藻细胞完全阻塞,死于窒息而导致死亡。

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