摘要
2009年7月(丰水期)和12月(枯水期)分别对沙田水库4个样点进行浮游植物采集。检测出浮游植物58种(含变种),隶属7门8纲18目31科46属。丰、枯水期均出现的优势种分别为史氏棒胶藻(Rhabdogloea smithii)、铜绿微囊藻(Microcystis aeruginosa)、微小多甲藻(Peridinium pusillum)、小球藻(Chlorella vulgaris);仅在丰水期形成的优势种分别为简单棕鞭藻(Ochromonas simplex)、梅尼小环藻(Cyclotella meneghiniana)、针形纤维藻(Ankistrodesmus aciculars)和柯氏并联藻(Quadrigula chodatii);而枯水期形成的优势种分别为分歧锥囊藻(Dinobryon divergens)、水溪绿球藻(Chlorococcum infusionum)。丰、枯水期丰度分别为(8.36±1.37)×105 cell·L^(-1)和(3.60±1.81)×105 cell·L^(-1);生物量分别为1.34±0.55 mm^3·L^(-1)和0.43±0.43 mm^3·L^(-1);Shannon-Weaver多样性指数变化范围在1.25—2.75之间,丰、枯水期水质分别为中营养和富营养水平。与2000年结果比较,浮游植物群落的物种组成由绿藻型更替为绿硅藻型,丰度组成由蓝-绿藻型更替为绿-蓝-甲藻型;清洁水体的优势种消失/减少,耐污种类优势种增加,其中绿藻优势种存在向小型、单细胞种类更替的趋势。
The samples of phytoplankton from 4 sites of Shatian Reservoir, Huizhou were collected in wet（July） and dry（December） periods of 2009. A total of 58 species and subspecies of phytoplankton were identified, belonging to 7 Phyla, 8 Classes, 18 Orders, 31 Families and 46 Genera. The Rhabdogloea smithii, Microcystis aeruginosa, Peridinium pusillum and Chlorella vulgaris were appeared in wet and dry periods as the dominant species. The Ochromonas simplex, Cyclotella meneghiniana, Ankistrodesmus aciculars and Quadrigula chodatii were appeared in wet period as the dominant species. The Dinobryon divergens and Chlorococcum infusionum were appeared in dry period as the dominant species. The abundances in the wet and dry periods were（8.36±1.37）×10^5 cell·L^-1 and（3.60±1.81）×10^5 cell·L^-1, respectively. The biovolume in the wet and dry periods was 1.34±0.55 mm^3·L^-1 and 0.43±0.43 mm^3·L^-1, respectively. The range of Shannon-Weaver index was from 1.25 to 2.75. The water quality was moderate eutrophic and eutrophic level in wet and dry periods of Shatian Reservoir, respectively. Compared with the data of 2000, the species composition of Chlorophyta type was replaced by Chloro-Bacilariophyta type, and the abundance composition of Cyano-Chlorophyta type was replaced by Chloro-Cyano-Dinophyta type. The dominant species of clean water were disappeared or decreased, while the pollution tolerant species as dominant species. The dominant species of Chlorophyta had replaced tendency by smaller and unicellular species.
作者
潘鸿
杨扬
唐宇宏
PAN Hong;YANG Yang;TANG Yuhong(School of Public Health,Zunyi Medical College,Zunyi 563000,China;Institute of Hydrobiology,Jinan University,Guangzhou 510632,China;School of Management,Zunyi Medical College,Zunyi 563000,China)
出处
《生态科学》
CSCD
2018年第4期154-159,共6页
Ecological Science
基金
广东省联合基金(U1501235)资助
关键词
浮游植物
群落结构
演替
沙田水库
phytoplankton
community structure
succession
Shatian reservoir
