Xu Guangjian, Zhong Xiaoxiao, Wang Yangfan, Warren Alan, Xu Henglong
College of Marine Life Science, Ocean University of China, Qingdao, 266003, China.
Environ Sci Pollut Res Int. 2014 Dec;21(23):13461-9. doi: 10.1007/s11356-014-3293-x. Epub 2014 Jul 12.
The functional parameters, i.e., the estimated equilibrium species number (S eq), the colonization rate constant, and the time taken to reach 90 % of S eq (T 90), of microperiphyton fauna have been widely used to determine the water quality status in aquatic ecosystems. The objective of this investigation was to develop a protocol for determining functional parameters of microperiphyton fauna in colonization surveys for marine bioassessment based on rarefaction and regression analyses. The temporal dynamics in species richness of microperiphyton fauna during the colonization period was analyzed based on a dataset of periphytic ciliates in Chinese coastal waters of the Yellow Sea. The results showed that (1) based on observed species richness and estimated maximum species numbers, a total of 16 glass slides were required in order to achieve coefficients of variation of <5 % in the functional parameters; (2) the rarefied average species richness and functional parameters showed weak sensitivity to sampling effort; (3) the temporal variations in average species richness were well-fitted to the MacArthur-Wilson model; and (4) the sampling effort of ~8 glass slides was sufficient to achieve coefficients of variation of <5 % in equilibrium average species number (AvS eq), colonization rate (AvG), and the time to reach 90 % of AvS eq (AvT 90) based on the average species richness. The findings suggest that the AvS eq, AvG, and AvT 90 values based on rarefied average species richness of microperiphyton might be used as reliable ecological indicators for the bioassessment of marine water quality in coastal habitats.
微型周丛动物区系的功能参数，即估计的平衡物种数（Seq）、定殖速率常数以及达到Seq的90%所需的时间（T90），已被广泛用于确定水生生态系统中的水质状况。本研究的目的是制定一种基于稀疏化和回归分析的方案，用于在海洋生物评估的定殖调查中确定微型周丛动物区系的功能参数。基于黄海中国近岸水域周丛纤毛虫的数据集，分析了定殖期微型周丛动物区系物种丰富度的时间动态。结果表明：（1）根据观察到的物种丰富度和估计的最大物种数，为使功能参数的变异系数<5%，总共需要16张载玻片；（2）稀疏化后的平均物种丰富度和功能参数对采样努力的敏感性较弱；（3）平均物种丰富度的时间变化与MacArthur-Wilson模型拟合良好；（4）基于平均物种丰富度，约8张载玻片的采样努力足以使平衡平均物种数（AvSeq）、定殖率（AvG）以及达到AvSeq的90%所需的时间（AvT90）的变异系数<5%。研究结果表明，基于微型周丛动物区系稀疏化平均物种丰富度的AvSeq、AvG和AvT90值可作为沿海生境海洋水质生物评估的可靠生态指标。
