【摘要】 经过一年对长江堤外江滩枫杨林、意杨林和芦苇林钉螺分布密度调查分析,发现以芦苇、草、苔草等草丛和以硅藻、绿藻、蓝藻单细胞类为主的水浸干湿交替微环境是钉螺喜生密集区.防浪林中钉螺的分布状况,并非为江水携螺而至呈均匀散布,实际为条块分隔状分布.更多还原

【Abstract】 Through a year’s investigation and analysis to the Oncomelania hupensis distribution density in the Pterocarya stenoptera community, the Populus spp. community and the Phragmites communis community on beach of the Yangtze River, it is found that mainly as Phragmites communis, Phalaris arundinacea, Carex cinerascens, etc., and single cell creature of Bacillariophyta, Chlorophyta, Cyanophyta, snails are likely to grow in the density area of micro-environment between land and water as well as dry and wet.The distribution density of snails in breakwater forest shows that it is strip and a long narrow piece.更多还原