Macrobenthic communities in the surrounding waters of Changli were investigated during spring and summer in2016.Differences in species quantity,abundance and biomass,the dominant species and species diversity index of...Macrobenthic communities in the surrounding waters of Changli were investigated during spring and summer in2016.Differences in species quantity,abundance and biomass,the dominant species and species diversity index of macrobenthos were analyzed.The results showed that58macrobenthos species were identified in spring,and92macrobenthos species were identified in summer.The composition of dominant species seasonally varied;however,most of them were species belonging to Polychaeta.The abundance of macrobenthos in summer was slightly higher than that in spring,while the biomass in summer was significantly smaller than that in spring.Bray-Curtis cluster analysis and multi-dimentional scaling(MDS)analysis indicated that macrobenthic communities were divided into three communities in spring,and two in summer.The abundance-biomass comparison(ABC)curve method was used to monitor the disturbance of environmental pollution for macrobenthic community.The results showed that the macrobenthos in this area received serious disturbance from environmental pollution.展开更多
The seasonal and spatial variations of phytoplankton abundance weresupported with microscopic analyses in the surrounding waters of Changli in the spring(May) and summer (August) of 2015. Nineteen sampling stations we...The seasonal and spatial variations of phytoplankton abundance weresupported with microscopic analyses in the surrounding waters of Changli in the spring(May) and summer (August) of 2015. Nineteen sampling stations were selected in thisstudied area (39°26′30"-39°39′ N, 119°17′30"-119°34′03"). During the survey period, atotal of 27 species of phytoplankton have been documented in spring and 63 species insummer. In terms of the community composition at the seasonal level and the spatialdistribution, Dinoflagellates was absolutely dominant in spring and Bacillariophyta wasdominant in summer. The average phytoplankton cell density of phytoplankton speciesshowed substantial seasonal differences. In addition, the dominant species in differentseasons were different. The average values of Shannon-Wiener diversity index (H')were 0.99 in spring and 3.25 in summer, which implied that species diversity in summeris higher than that in spring. Redundancy analysis (RDA) revealed that ammonium(NH4+-N) and nitrites nitrate nitrogens (NO3--N) were the important environmentalfactors influencing the phytoplankton distribution. N is the main environmental drivingfactor result from environmental indicators and RDA analysis.展开更多
The seasonal and spatial variations of zooplankton community and theircorrelation with environmental factors were studied at nineteen sites in the coastalwater near Luan River Estuary. A total of 25 taxa of zooplankto...The seasonal and spatial variations of zooplankton community and theircorrelation with environmental factors were studied at nineteen sites in the coastalwater near Luan River Estuary. A total of 25 taxa of zooplankton were identified, amongwhich copepods being the most abundant groups (93.6% and 74.9% of totalabundance in spring and summer, respectively). Copepoda species assemblage wasthe same in spring and summer: Paracalanus parvus and Acartia bifilosa being thepredominant species, occupied more than 15% of total copepoda abundance.Zooplankton abundance was higher in spring than in summer, with an average of11 657 ind/m3 and 1549 ind/m3, respectively. One-way analysis of variance (ANOVA)showed that there was a significant difference of total zooplankton abundance betweenspring and summer (p<0.001). Redundancy analysis (RDA) revealed that salinity andnutrient were the main environmental factors influencing zooplankton group’sdistribution in spring and summer, respectively.展开更多
基金supported by Ecological Restoration Technique in Typical Bay (No. TKS160226)Tianjin Municipal Science and Technology Planning Project (15ZCZDSF00620)
文摘Macrobenthic communities in the surrounding waters of Changli were investigated during spring and summer in2016.Differences in species quantity,abundance and biomass,the dominant species and species diversity index of macrobenthos were analyzed.The results showed that58macrobenthos species were identified in spring,and92macrobenthos species were identified in summer.The composition of dominant species seasonally varied;however,most of them were species belonging to Polychaeta.The abundance of macrobenthos in summer was slightly higher than that in spring,while the biomass in summer was significantly smaller than that in spring.Bray-Curtis cluster analysis and multi-dimentional scaling(MDS)analysis indicated that macrobenthic communities were divided into three communities in spring,and two in summer.The abundance-biomass comparison(ABC)curve method was used to monitor the disturbance of environmental pollution for macrobenthic community.The results showed that the macrobenthos in this area received serious disturbance from environmental pollution.
文摘The seasonal and spatial variations of phytoplankton abundance weresupported with microscopic analyses in the surrounding waters of Changli in the spring(May) and summer (August) of 2015. Nineteen sampling stations were selected in thisstudied area (39°26′30"-39°39′ N, 119°17′30"-119°34′03"). During the survey period, atotal of 27 species of phytoplankton have been documented in spring and 63 species insummer. In terms of the community composition at the seasonal level and the spatialdistribution, Dinoflagellates was absolutely dominant in spring and Bacillariophyta wasdominant in summer. The average phytoplankton cell density of phytoplankton speciesshowed substantial seasonal differences. In addition, the dominant species in differentseasons were different. The average values of Shannon-Wiener diversity index (H')were 0.99 in spring and 3.25 in summer, which implied that species diversity in summeris higher than that in spring. Redundancy analysis (RDA) revealed that ammonium(NH4+-N) and nitrites nitrate nitrogens (NO3--N) were the important environmentalfactors influencing the phytoplankton distribution. N is the main environmental drivingfactor result from environmental indicators and RDA analysis.
基金Supported by the Special Fund for Agro-Scientific Research in the Public Interest(201303056 and 201503108)Chinese Academy of Sciences(Projects Y45Z04,Y62302 and ZDRW-ZS-2017-3-2)。
文摘2011年3月至2012年2月,通过逐月调查的方式,分析了大通湖河蚬的种群动态,并采用体长频率分布法计算其次级生产力。调查共采集分析河蚬4108个,壳长(SL)和湿重(WW)范围分别为3.41—29.58 mm和0.005—10.03 g。大通湖河蚬SL和WW之间的关系为WW=–3.52+3.08logSL (R2=0.97),表明其种群呈异速生长;繁殖高峰主要集中在3—4月和8—10月。河蚬的年平均密度和生物量(,以无灰干重计, AFDW)分别为(274±95) ind./m2和(20.1±5.7) g AFDW/m2,年次级生产力(P)为23.90 g AFDW/(m2·年), P/系数为1.20/年,周转率为298d。基于VonBertalanffy季节生长方程估算的河蚬生长参数为:渐近壳长L∞=31.91 mm,生长速率K=0.45,振幅C=0.84,冬季点WP=0.09,表明大通湖河蚬生长呈明显的季节性, 1月生长速率最低。河蚬最长寿命(tmax)约为4.44年,年总死亡系数(Z)为1.68,自然死亡系数(M)为0.89,捕捞死亡系数(F)为0.79,年开发率(E)为0.47。结果表明大通湖河蚬资源处于过度开发状态,急需采取有效的措施对其资源进行合理保护。
文摘The seasonal and spatial variations of zooplankton community and theircorrelation with environmental factors were studied at nineteen sites in the coastalwater near Luan River Estuary. A total of 25 taxa of zooplankton were identified, amongwhich copepods being the most abundant groups (93.6% and 74.9% of totalabundance in spring and summer, respectively). Copepoda species assemblage wasthe same in spring and summer: Paracalanus parvus and Acartia bifilosa being thepredominant species, occupied more than 15% of total copepoda abundance.Zooplankton abundance was higher in spring than in summer, with an average of11 657 ind/m3 and 1549 ind/m3, respectively. One-way analysis of variance (ANOVA)showed that there was a significant difference of total zooplankton abundance betweenspring and summer (p<0.001). Redundancy analysis (RDA) revealed that salinity andnutrient were the main environmental factors influencing zooplankton group’sdistribution in spring and summer, respectively.
