Roy Suparna
Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Annamalai Nagar, Tamilnadu, India.
Heliyon. 2020 Jul 31;6(7):e04585. doi: 10.1016/j.heliyon.2020.e04585. eCollection 2020 Jul.
Seasonal variation of seaweed diversity was studied in Olaikuda and Vadakkadu, the two unexplored coastal areas in Rameshwaram Island in south coast of India. An extensive survey on seasonal changes of seaweed diversity was made study and the data were analyzed for different diversity indices. In each location, 3 transects at 100 m gap were taken and in each transect 10 quadrates, a total of 30 quadrates were taken for seaweeds diversity. The diversity data were analyzed with statistical methods such as graphical and statistical analysis K-dominance curve with software PRIMER package, cluster analysis, multivariate methods, anosim and diversity indices such as Shannon Weaver diversity index, Simpson species richness index, Fisher alpha index, Pielou's evenness, and taxonomic species diversity (delta) index were analyzed by using the software R statistic version 3.1.4. Package (vegan). Totally 74 species including 28 species of Chlorophyceae, 18 species of Phaeophyceae and 28 species of Rhodophyceae were recorded. The study areas are flourishing with 49-59 seaweed species. It is inferred that the seaweeds are well diversified seasonally except summer. The baseline data generated in this work will help in conservation of the seaweeds in the areas.
在印度南海岸拉梅斯瓦拉姆岛的两个未开发沿海地区奥拉库达和瓦达卡杜，对海藻多样性的季节变化进行了研究。对海藻多样性的季节变化进行了广泛调查，并对不同多样性指数的数据进行了分析。在每个地点，以100米的间隔设置3条样带，每条样带设置10个样方，共采集30个样方用于海藻多样性研究。利用图形和统计分析等统计方法，如使用PRIMER软件包的K优势度曲线、聚类分析、多元方法、anosim，以及利用R统计版本3.1.4软件包（vegan）分析香农-韦弗多样性指数、辛普森物种丰富度指数、费舍尔阿尔法指数、皮洛均匀度和分类物种多样性（δ）指数等多样性指数。共记录了74个物种，其中绿藻门28种、褐藻门18种、红藻门28种。研究区域有49 - 59种海藻生长繁茂。据推断，除夏季外，海藻在季节上具有良好的多样性。这项工作产生的基线数据将有助于该地区海藻的保护。
