锦江河特有鱼类国家级水产种质资源保护区浮游动物群落结构

发布时间：2017-12-31 04:41

  本文关键词：锦江河特有鱼类国家级水产种质资源保护区浮游动物群落结构　出处：《渔业现代化》2016年05期 　论文类型：期刊论文

  更多相关文章： 锦江河 水产种质资源 保护区 浮游动物 群落结构 生物多样性指数

【摘要】：为研究锦江河特有鱼类国家级水产种质资源保护区浮游动物群落结构特征,于2015年1月、4月、7月和10月按季度在锦江河保护区进行采样分析。结果显示,在保护区共采集到浮游动物4门51属82种,轮虫类、原生动物、桡足类和枝角类物种数占浮游动物物种总数的比例分别为46.34%、29.27%、15.85%和8.54%。优势种类为4门6属16种,其中轮虫类6种,原生动物4种,枝角类4种,桡足类2种。保护区浮游动物密度变幅为297.76~1 430.10 ind/L,平均为855.13 ind/L;生物量变幅为5.73~26.36 mg/L,平均为14.37 mg/L;群落丰富度指数(D_m)变幅为3.18~4.90,平均为3.96;香农指数(H')变幅为2.11~3.12,平均为2.81;均匀度指数(J')变幅为0.81~0.89,平均为0.86。研究表明,在被摄食压力下降及饵料生物资源下降的共同影响下,保护区外界环境对个体较小的原生动物和轮虫有利,群落生态优势度也集中于上述浮游动物类群。受到水文特征的影响,锦江河核心区的浮游动物物种数、密度和生物量以及多样性指数总体高于实验区。
[Abstract]:In order to study the characteristics of zooplankton community in Jinjiang River endemic Fish Germplasm Reserve, January 2015, April. In July and October, sampling and analysis were carried out in Jinjiang River Reserve. The results showed that there were 82 species of zooplankton, 51 genera and 4 phyla, rotifers and protozoa. The percentage of copepod and Cladocercus species in the total zooplankton species was 46.34 and 29.277.85% and 8.54.The dominant species were 4 phyla, 6 genera and 16 species. There are 6 species of rotifers, 4 species of protozoa, 4 species of Cladocera and 2 species of copepod. The density variation of zooplankton in the reserve is 297.76 ~ 1 430.10 ind/L. The average was 855.13 ind / L; The biomass varied from 5.73 to 26.36 mg / L, with an average of 14.37 mg / L; The variation of community richness index (D _ m) was 3.18 ~ 4.90, with an average of 3.96; The range of Shannon index is 2.11 ~ 3.12, with an average of 2.81; The evenness index was 0.81 ~ 0.89, with an average of 0.86. The results showed that the decrease of feeding pressure and the decrease of feed biological resources were the common effects. The outside environment of the reserve is favorable to the individual protozoa and rotifer, and the ecological dominance of the community is also concentrated in the zooplankton groups mentioned above. Due to the influence of hydrological characteristics, the species number of zooplankton in the core area of Jinjiang River. The density, biomass and diversity index were higher than those in the experimental area.
【作者单位】： 铜仁学院生物与农林工程学院梵净山特色动植物资源重点实验室;铜仁市创建国家环境保护模范城市办公室;
【基金】：贵州省科技厅项目([2014]7481) 铜仁市创建国家环境保护模范城市课题(Trcmb16-4) 贵州省高等学校重点支持学科[黔教合重点学科字(2011)232]
【分类号】：S931.1
【正文快照】： 锦江河发源于贵州省梵净山南麓,河流呈南北走向,北部最终流入湖南境内,该河宽30~100 m,深3~10 m,流速缓慢,全程158 km,流域面积4 086 km2。2009年经农业部审定,锦江河成为第三批特有鱼类国家级水产种质资源保护区,重点保护区域为贵州省铜仁段,该河段长68.6 km,总面积约980 hm2，

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