Community structure and relationship with environmental factors of phytoplankton in Songmushan Reservoir in Dongguan City of Guangdong Province
WANG Yakun,WANG Yang,PEI Ruihua,WU Pengju,HUANG Na,LI Yifan,YUAN Chen,LIU Qigen,HU Zhongjun
1.Key Laboratory of Freshwater Aquatic Germplasm Resources,Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China;2.Centre for Research on Environmental Ecology and Fish Nutrition,Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China;3.Dongguan Ecological Environmental Protection Research Institute Company Limited,Dongguan 523000,China;4.Water Engineering Construction and Operation Center of Dongguan Songshan Lake Hi-Tec Industrial Development Zone,Dongguan 523000,China
Abstract: In order to understand the status of phytoplankton and eutrophication level in Songmushan Reservoir (113°53′15″E,22°53′47″N)in Dongguan City of Guangdong Province,the phytoplankton community structural characteristics including species composition,standing crop and diversity and their spatial and temporal profile were investigated in the phytoplankton samples collected at 7 sites in April (spring),July (summer),September (autumn)and December (winter)of 2019.Totally,134 phytoplankton species (genera)were identified in this reservoir,with 51.49% of members in Chlorophyta.There were 12 dominant species,majority belonging to Cyanophyta (90%)and Pseudoanabaena sp.,Aphanocapsa sp.,and Cylindrospermopsisraciborskii being ranked among the top three in terms of dominance index.There was significant difference in species composition among seasons,without significant difference in species composition between reservoir areas,with one cluster of spring,summer and autumn phytoplankton samples and another cluster of winter samples.They were separated by indicator species like C.raciborskii,Merismopediatenuissima,Aphanocapsa sp.,and Aphanizomenonflosaquae.The mean abundance of the whole phytoplankton community was shown to be (15.09±10.75)×107 cells/L,and 85.17% contributed by Cyanophyta,with the average biomass of (19.65±12.74)mg/L,50.66% contributed by the above phylum.They both differed significantly between seasons and among reservoir areas,and significant season×area effects were found (P<0.05).There was only significant spatial difference in Margalef species richness (P<0.05),without spatial and temporal differences in both Pielou evenness and Shannon’s species diversity (P>0.05).The density and biomass of phytoplankton were both found to be positively and significantly correlated with water temperature (P<0.05),and the density to be negatively and significantly correlated with total nitrogen (P<0.05).The water temperature,pH value,and concentrations of ammonia nitrogen and total nitrogen were of the main environmental factors influencing the spatial and temporal distribution pattern of phytoplankton species composition.The findings indicated that the reservoir was moderately eutrophic or polluted,being shown by species richness and trophic level indices.
王亚坤, 汪洋, 裴瑞华, 吴鹏举, 黄娜, 李一帆, 袁晨, 刘其根, 胡忠军. 广东东莞松木山水库浮游植物群落结构特征及其与环境因子的关系[J]. 大连海洋大学学报, 2022, 37(1): 129-139.
WANG Yakun, WANG Yang, PEI Ruihua, WU Pengju, HUANG Na, LI Yifan, YUAN Chen, LIU Qigen, HU Zhongjun. Community structure and relationship with environmental factors of phytoplankton in Songmushan Reservoir in Dongguan City of Guangdong Province. Journal of Dalian Ocean University, 2022, 37(1): 129-139.
2022, Vol. 37 
