CAJ | 학술논문

通过为期一年的疏浚模拟试验,在试验室培养疏浚与对照柱样研究了底泥疏浚对沉积物微生物活性和群落功能多样性的影响.研究结果表明,太湖梅梁湾研究区模拟疏浚表层30cm对沉积物物理、化学和微生物性质影响较大.疏浚沉积物微生物活性显著低于未疏浚沉积物的微生物活性,疏浚对沉积物微生物活性影响较大且在一年的试验周期内难以恢复.底泥疏浚对沉积物微生物功能多样性产生影响,疏浚后初期新生表层沉积物的微生物群落多样性指数显著低于未疏浚沉积物,底泥疏浚改变了沉积物中微生物群落组成,并会导致微生物群落功能多样性降低.底泥疏浚对微生物活性与微生物群落功能多样性产生影响,从而对沉积物中生源要素的循环产生影响.
통과위기일년적소준모의시험,재시험실배양소준여대조주양연구료저니소준대침적물미생물활성화군락공능다양성적영향.연구결과표명,태호매량만연구구모의소준표층30cm대침적물물리、화학화미생물성질영향교대.소준침적물미생물활성현저저우미소준침적물적미생물활성,소준대침적물미생물활성영향교대차재일년적시험주기내난이회복.저니소준대침적물미생물공능다양성산생영향,소준후초기신생표층침적물적미생물군락다양성지수현저저우미소준침적물,저니소준개변료침적물중미생물군락조성,병회도치미생물군락공능다양성강저.저니소준대미생물활성여미생물군락공능다양성산생영향,종이대침적물중생원요소적순배산생영향.
A laboratory experiment for studying the effects of sediment dredging on microbial activity and functional diversity of microbial community of sediments was carried out though one year.Using incubation of undredged(control)and dredged cores,we found that dredging the upper 30cm layer of sediment remarkably affected physico-chemical and microbial characteristics of sediments in the study area of Meiliang Bay,Lake Taihu.The microbial activity in dredged sediments was significantly lower(P ＜0.05)than that in undredged sediments.Sediment dredging affected considerably microbial activity in sediments,and the microbial activity in dredged sediments could not recovery in one year experiment.Sediment dredging also affected the functional diversity of microbial community in sediment,the diversity index of microbial community in eady dredged sediments was significantly lower (P ＜ 0.05)than that in undredged sediments.Sediment dredging modified the community composition of sediment microbial ecosystem and resulted in decreasing of diversity of microbial community.Sediment dredging affected microbial activity and functional diversity of microbial community,which consequently affected the cycling of biogenic elements in sediments.