Impacts of sediment type on the performance and composition of submerged macrophyte communities

摘要: To restore deteriorated lake ecosystems, it is important to identify environmental factors that influence submerged macrophyte communities. While sediment a critical factor for macrophytes and many studies have examined effects of type on the growth individual macrophytes, very few tested how affects species composition We constructed communities containing four co-occurring (Hydrilla verticillata, Myriophyllum spicatum, Ceratophyllum demersum Chara fragilis) subjected them three treatments, i.e., clay, mixture clay quartz sand at volume ratio 1:1 1:4. Compared treatment greatly increased overall biomass, number shoot nodes length community, but decreased its diversity. This was because substantially promoted H. verticillata within making most abundant in sediment, M. spicatum C. demersum. The had no significant fragilis. As primary nutrient source plant growth, can differential various could enhance performance communities, increasing by 39.03%, 150.13% 9.94%, respectively, compared treatment. Thus, measures should be taken mediate condition with different dominant species.