摘要
通过8种甲藻构建不同物种丰富度梯度的集群进行室内一次性培养实验,探讨了集群生物量随物种丰富度的增长模式,运用多因素方差分析检验集群内是否存在抽样效应.运用超产分析、相对产量之和分析和子集分析方法,检验了集群内的生态位互补效应,并运用分离加性方程法定量分离了抽样与互补效应.结果表明:集群生物量随物种丰富度呈饱和型上升趋势;集群内存在较强的互补效应;在指数生长期,某些特定物种对集群生物量有显著影响,但在生长稳定期,集群生物量不受个别物种出现与否的影响;在生长稳定期,抽样效应总体上为负,而互补效应与净生物多样性效应则总体为正.
With eight species of unicellular algae assemblages with different degrees of richness, cultured in random combinations to construct the the increase pattern of colony biomass with the change of species richness was investigated, and the sampling effect was detected by using multiple variance analysis （MANOVA） method. Three analysis methods, i. e. , over-yielding analysis, relative yield total （RYT） index, and subset approach, were applied to explore the complementary effect, and additive partitioning method was applied to separate the sampling effect and complementary effect quantitatively. The results showed that the colony biomass presented a saturated rise with the increase of species richness, and a strong complementary effect was observed in phytoplankton colonies. At exponential growth phase, some specific algal species affected the colony biomass significantly, but after reaching the stable phase, the biomass was not affected by the presence of given phytoplankton. The sampling effect was generally negative at stable phase, while the complementary effect and net biodiversity effect were always positive.
出处
《应用生态学报》
CAS
CSCD
北大核心
2008年第4期887-892,共6页
Chinese Journal of Applied Ecology
基金
国家重大基础研究前期研究专项项目(2002CCA4900)
国家重点基础研究发展规划资助项目(2001CB409700)
关键词
浮游植物
物种丰富度
生物量
抽样效应
互补效应
phytoplankton
species richness
biomass
sampling effect
complementary effect.
