浮游植物增殖能力的研究探讨   总被引：14，自引：0，他引：14       下载免费PDF全文

杨东方  高振会  孙培艳  李钦亮  陈立婧 《海洋科学》2003,27(5):19-21

作者从浮游植物生态的意义出发,提出了新概念:浮游植物的增殖能力。增殖能力包含碳同化系数、光照时间和真光层的厚度,它充分反映了自然海区的浮游植物本身的增殖过程,并能够进行定量化的描述,也排除了叶绿素含量变化的影响。该概念可以克服初级生产力和初级生产过程的基础——叶绿素量的两个变量在海域中所观察到的不一致性。与传统观  相似文献   

Rotifer community structure and assessment of water quality in Yangcheng Lake   总被引：1，自引：0，他引：1  

陈立婧  刘樵  彭自然  胡忠军  薛俊增  王武 《中国海洋湖沼学报》2012,30(1):47-58

Rotifer community structure was investigated in Yangcheng Lake in 2008. Dominant species and species diversity indices were determined and QB/T was used to assess water quality. The annual average density and biomass of the rotifers in Yangcheng Lake was 2 894 ± 1 006 ind./L and 12.47 ± 10.28 mg/L, respectively. The highest densities were observed in the western portion of the lake in March, but the highest biomass occurred in inflowing creeks in September. Within a year of monitoring in Yangcheng Lake, 93 species were identified and the dominant species were found to be Polyarthra trigla, Brachionus angularis, Keratella cochlearis, Keratella valga, Brachionus calyciflorus, and Filinia major. Of the species recorded, 75 were pollution indicator species. Density and biomass exhibited significant positive correlations with water temperature (R = 0.209, P = 0.003; R = 0.446, P = 0.000), but the peak density showed two lags in response to chl a. According to the Jaccard similarity index (SJ), the greatest similarity among dominant species occurred between creeks and the eastern part of the lake. The annual average Shannon-Wiener diversity index H’, Margalef richness index D and Pielou evenness index J were 1.96 ± 0.34, 1.61 ± 0.50 and 0.77 ± 0.10, respectively. In all four areas of Yangcheng Lake, β- mesosaprobic species comprised the largest share of pollution indicator species. These data suggest that Yangcheng Lake is mesosaprobic.  相似文献