Soylu Elif Neyran, Gonulol Arif
Department of Biology, Faculty of Arts and Science, Giresun University, 28100, Giresun, Turkey.
J Environ Biol. 2010 Sep;31(5):629-36.
The seasonal succession, composition and diversity of phytoplankton in a eutrophic lagoon (Liman lake) were studied between January 2002 and November 2003. Samples were collected from surface water and deeper (1 m depth) at stations and species diversity (Shannon-Weaver, H) and evenness were calculated. Shannon Diversty was similar at Station 1 and Station 2. Minimum and maximum diversity values (0.101 and 0.765 bits. mm3) were recorded in June and July 2003 at Station 2. Cluster analysis and NMDS (Non metric multidimensial scaling) were applied to the phytoplankton community. The lagoon exhibits high conductivity (7211-10757 microScm(-1)), mean temperature of 17.7 degrees C, varying concentrations of dissolved oxygen (3.3-8.4 mg l(-1)). Light, temperature, rainfall, turbidity and salinity were expected to be the main factors affecting the seasonal succession. The seasonal succession of phytoplankton were similar at surface water and 1 m depth. A total of 130 taxa belonging to Bacillariophyta, Chlorophyta, Euglenophyta, Cyanophyta, Dinophyta, Xantophyta, Chrysophyta and Cryptophyta divisions were identified. Pseudanabaena limnetica, Kirchneriella obesa, Kirchneriella lunaris, Ankistrodesmus falcatus and Ankistrodesmus spiralis were highly represented.
2002年1月至2003年11月期间，对一个富营养化泻湖（利曼湖）中浮游植物的季节演替、组成和多样性进行了研究。在各站点采集地表水和较深（1米深度）水样，并计算物种多样性（香农-韦弗指数，H）和均匀度。站点1和站点2的香农多样性相似。2003年6月和7月在站点2记录到最小和最大多样性值（分别为0.101和0.765比特·mm³）。对浮游植物群落进行了聚类分析和非度量多维尺度分析（NMDS）。该泻湖具有高电导率（7211 - 10757微西门子/厘米）、平均温度17.7摄氏度、溶解氧浓度变化范围为3.3 - 8.4毫克/升。光照、温度、降雨、浊度和盐度被认为是影响季节演替的主要因素。地表水和1米深度处浮游植物的季节演替相似。共鉴定出属于硅藻门、绿藻门、裸藻门、蓝藻门、甲藻门、黄藻门、金藻门和隐藻门的130个分类单元。湖泊假鱼腥藻、肥胖四角藻、月形四角藻、镰形栅藻和螺旋栅藻的出现频率很高。
