鄱阳湖区圩垸内外植被与钉螺分布关系研究  

Studies on relationship between vegetation and snail distribution inside and outside embankment of Poyang Lake region

作　　者：李召军 陈红根 刘跃民 曾小军 林丹丹 万文豪[2] 

机构地区：[1]江西省寄生虫病防治研究所 [2]南昌大学生命科学学院

出　　处：《中国血吸虫病防治杂志》2006年第6期406-410,共5页Chinese Journal of Schistosomiasis Control

基　　金："十五"国家科技攻关项目(2004BA718B04)

摘　　要：目的探讨鄱阳湖区圩垸内外植被和钉螺分布的关系。方法对余干县、南昌县和进贤县的4个洲垸型村庄及相邻洲滩的高、中、低3个高程地带、圩垸内的耕作带和非耕作带，以分层系统抽样方法调查植被种类、高度、盖度、频度，并同步调查钉螺分布和感染情况，分析不同地带的植被优势群丛与钉螺分布的关系。结果圩垸内外植被差异明显，垸内植被种类多杂，分布无明显规律，未查见钉螺；垸外洲滩植被发达，覆盖面积大，呈不规则环带状或片状分布，群丛分布明显；钉螺主要分布在15～17m高程地带，与植被类型关系密切，植物优势群丛苔草或南荻盖度与钉螺密度成二次曲线关系。结论鄱阳湖区洲滩植被与钉螺分布受共同的环境因素影响，表现出两者分布上密切关联性，圩垸建成后垸内钉螺逐渐消失，可能与这些生态因素变化的综合作用有关。Objective To explore the relationship between vegetation and the distribution of Oncomelania snails inside and outside the embankments of Poyang Lake region. Methods The plantation and Oncomelania snails were surveyed at 4 villages and their related marshlands in Yugan, Nanchang and Jinxian counties by the stratified systematic sampling method. The investigation was tar geted to the vegetation species,height,coverage and frequency of plantation and synchronously to the distribution of snails and infection of snails in marshland of high, middle and low altitudes,adjacent beaches as well in cultivated and waste land inside embankment. The relationship between vegetation dominant association and the distribution of snails in those area was analyzed. Results The vegetation inside and outside the embankment were remarkably diverse. Inside the embankment, the species of vegetation varied greatly and distributed randomly, and no snail was found. While outside the embankment, the distribution of vegetation characterized an unregulated annulus or patch. Plant＇s association types were distinct on marshlands. The snails mainly distributed in areas at 15-17 m altitude,closely related to the species of vegetation. The coverage of dominant plants, Carex cinerascen and Miscanthus sacchariflorus showed a quadratic curve correlation with the density of snails. Conclusions In the Poyang Lake region,plants and snails are impacted by common environmental factors ,which then lead to their close association in distribution. It might be attributed to integrated impacts of changes in ecological factors that Oncomelania snails disappear gradually in areas inside embankment after construction of embankment.

关 键 词：植被 钉螺 鄱阳湖 

分 类 号：R383.24[医药卫生—医学寄生虫学]