水生生物学报2018，Vol.42Issue(2)：382-391,10.DOI:10.7541/2018.049
枯水季节赣江近岸水洼与浅滩中浮游动物的群落差异
VARIATION OF ZOOPLANKTON COMMUNITIES IN ALONGSHORE TEMPORAL POOLS AND RIFFLES OF GANJIANG RIVER DURING DRY SEASON
摘要
Abstract
Water level fluctuations mediate species composition and abundance dynamics of zooplankton to impact the structure and function of aquatic ecosystems. There are many temporary pools formation along the bed of Ganjiang River due to water level decline in dry season. To explore the variation of zooplankton communities in pools and adja-cent riffles, three pools and riffles, located in Nanchang section of Ganjiang River, were used to collect zooplankton in January and March of 2015 to investigate species composition, density, biomass, species diversity, and community structure. Water environment factors, zooplankton density and biomass in pools and riffles were analyzed by one-way ANOVA to test the variance. Zooplankton communities in pools and riffles were analyzed by Non-metric multi-dimen-sional scaling (NMDS) and analysis of similarity (ANOSIM) with software Primer 5.0. A total of 44 species of zoo-plankton were identified. Among them, 30 rotifers (68%), 7 cladocerans (16%) and 7 copepods (16%) were recorded. There were five dominant species with index of relative importance greater than 1000,which were Sinocalanus dorrii, Polyarthra dolichoptera,Copepod nauplii,Brachionus angularis and Synchaeta oblonga.The results of one-way AN-OVA suggested that water depth, conductivity and total nitrogen of pools were significantly higher than those of riffles (P<0.05). In January, the water temperature, pH, dissolved oxygen, turbidity and total phosphorus of riffles were slightly higher than those of pools. In March, the water depth, pH and total nitrogen of pools were slightly higher than those of riffles. Dissolved oxygen, turbidity and total phosphorus of riffles were higher than pools. The water tempera-ture and conductivity in the two water bodies were very close. In January, the total density (7.90 ind./L) and biomass (7.78 μg/L) of zooplankton in pools were lower than those in riffles (9.34 ind/L, 19.03 μg/L). On the contrary, the total density (24.27 ind./L) and biomass (332.14 μg/L) of zooplankton in pools were higher than those in riffles (22.86 ind./L, 146.10 μg/L). The Shannon-winner index (H'), Pielou evenness index (J) and species richness index (D) of zoo-plankton in riffles were higher than those in pools. Marginally significant difference in zooplankton communities between pools and riffles in January (P=0.067) were found by non-metric multi-dimensional scaling and similarity ana-lysis. Zooplankton communities in January showed two communities: pool community and riffle community. In March, pools and riffles were gradually connected with the rising water level. There were no significant differences in zoo-plankton communities between the two habitats (P=0.313). Spearman correlation coefficient showed that water depth and dissolved oxygen were main environmental factors in variation of zooplankton density between pools and riffles. Zooplankton communities had significant correlations with pH, conductivity, total nitrogen and phosphorus (P<0.05) in the two habitats.关键词
浮游动物/群落结构/暂时性水洼/浅滩/赣江Key words
Zooplankton/Community structure/Temporary pool/Riffle/Ganjiang River分类
生物科学引用本文复制引用
余文生,詹文荣,聂雪,胡旭仁,潘莹,秦海明,舒凤月..枯水季节赣江近岸水洼与浅滩中浮游动物的群落差异[J].水生生物学报,2018,42(2):382-391,10.基金项目
国家自然科学基金(31560133) （31560133）
长江科学院开放研究基金(CKWV2015238/KY) （CKWV2015238/KY）
南昌大学鄱阳湖环境与资源利用教育部重点实验室开放基金(13006457)资助[Supported by the National Natural Science Foundation of China(31560133) （13006457）
Open Research Fund of Changjiang River Scientific Research Institute(CKWV2015238/KY) （CKWV2015238/KY）
Open Research Fund of Poyang Lake Environment and Resources Key Laboratory of Ministry of Education,Nanchang University(13006457)] （13006457）
