CSIR- National Institute of Oceanography, Dona Paula, Goa 403 004, India.
CSIR- National Institute of Oceanography, Dona Paula, Goa 403 004, India.
Mar Pollut Bull. 2017 Feb 15;115(1-2):498-506. doi: 10.1016/j.marpolbul.2016.11.035. Epub 2016 Dec 15.
Dinoflagellate community structure from two semi-enclosed areas along the South Andaman region, India, was investigated to assess the anthropogenic impact on coastal water quality. At the densely inhabited Port Blair Bay, the dominance of mixotrophs in water and Protoperidinoids in sediments was attributed to anthropogenic nutrient enrichment and prey availability. A significant decrease in dinoflagellate abundance from inner to outer bay emphasize the variation in nutrient availability. The dominance of autotrophs and Gonyaulacoid cysts at the North Bay highlight low nutrient conditions with less anthropogenic pressure. The occurrence of oceanic Ornithocercus steinii and Diplopsalis sp. could evince the oceanic water intrusion into the North Bay. Nine potentially harmful and red-tide-forming species including Alexandrium tamarense complex, A. minutum were identified in this study. Although there are no harmful algal bloom (HABs) incidences in this region so far, increasing coastal pollution could support their candidature towards the future HABs initiation and development.
本研究调查了印度南安达曼地区两个半封闭区域的甲藻群落结构，以评估人为因素对沿海水域水质的影响。在人口密集的布莱尔港湾，由于人为富营养化和猎物可用性，水体内以混养生物为主，沉积物中以原甲藻为主。从内湾到外湾，甲藻丰度显著减少，强调了营养物质可用性的变化。北湾以自养生物和 Gonyaulacoid 囊泡为主，表明该地区的营养水平较低，人为压力较小。海洋生物 Ornithocercus steinii 和 Diplopsalis sp. 的出现表明，海洋水已经侵入了北湾。本研究共鉴定出 9 种潜在有害和赤潮形成物种，包括亚历山大藻复合种、微小亚历山大藻。尽管该地区迄今尚未发生有害藻华（HABs）事件，但不断增加的沿海污染可能会支持这些藻类成为未来 HABs 爆发和发展的候选物种。
