长江科学院院报2016，Vol.33Issue(8)：1-5,10,6.DOI:10.11988/ckyyb.20150378
洲滩钉螺垂向迁徙对水位变化的滞后响应研究
Delayed Response of Snails’ Vertical Migration on the Bottomland to the Changed Water Level
摘要
Abstract
As the only intermediate host of schistosome , snails generally live at the bottomland of lakes .The vertical migration of snails on the bottomland is closely related to the water level but usually delayed to the water level alter -ation, which has not yet been considered in previous studies .As a result, the snails’ vertical migration is always difficult to describe or predict accurately .A generalized model for the changes of snails ’ vertical distribution was proposed in this study , and a calculation method is developed for predicting the theoretical distribution elevation of snails in the presence of altered water level .The calculation method reveals that:1) .the elevation at which snails are distributed increases with the rise of water level and decreases with the decline of water level ;2) .the distance between the snail distribution elevation and the water level decreases with the rising of water level, and increases <br> with the descending of water level .According to the field data at the Dongkou bottomland of Dongting Lake , the calculation method based on the delayed response for predicting the snails ’ distribution elevation was tested , and the results showed that the relationship between the snails ’ vertical distribution and the water level alteration estab-lished in this paper can be used to accurately predict the snails ’ distribution elevation .关键词
钉螺/带状分布/垂向迁徙/水位/滞后响应Key words
snail/zonal distribution/vertical migration/water level/delayed response分类
建筑与水利引用本文复制引用
李凌云,卢金友,范北林,王家生..洲滩钉螺垂向迁徙对水位变化的滞后响应研究[J].长江科学院院报,2016,33(8):1-5,10,6.基金项目
国家自然科学基金项目 （）
