互花米草在不同生境中的形态可塑性与生物量分配

该文以分布于广西合浦山口红树林保护区的互花米草(Spartina alterniflora)为研究对象,研究了不同的生境条件(淤泥质、泥沙质、沙质)对其形态因子和生物量的影响.结果表明:生境条件对互花米草的形态因子和生物量的生长有显著影响.三种生境中,以淤泥质中生长的互花米草的单位面积株数和生物量最高;比较单株的形态因子,则以泥沙质中的互花米草长势最佳,并与淤泥质、沙质相差显著;在淤泥质与沙质中,除地下生物量外,其它形态因子与生物量之间没有显著差异;在不同的生境中互花米草生物量的分配存在一定的差异;土壤透气性及养分含量可能是影响互花米草形态因子和生物量差异的主要因素.

Morphological plasticity and biomass allocation of Spartina alterniflora lossel in different habitats

The morphological factors and biomass of Spartina alterniflora in three different habitats (clay,loam,and sand) were studied in this paper.The results show that the habitats is a distinct effect on the morphological factors and the biomass of Spartina alterniflora Among the three habitats,the individual number and biomass of the species in clay habitat are the highest.Spartina alterniflora grow is the best in the loam habitat than in other two habitats.In clay and sand habitats,there is not significant difference except the underground biomass.In the three habitats,there are more or less differences in the biomass distribution.It has been found that the air permeability and nutrient contents may be the main factors,affect the morphological factor and the biomass size of Spartina alterniflora.