论文部分内容阅读
目的探索江滩植被、土壤、水和光照强度等微生态环境因子与钉螺分布的关系,为生态控制钉螺提供基础资料。方法选择长江芜湖段的澛港大桥、龙窝湖外滩和龙窝湖内滩3个区域,调查植物特征(种类、高度、盖度、频度和株丛数)、土壤特征(温度、湿度、pH值)和光照强度等,采用SPSS 18.0软件进行统计学分析。结果 3个试区共调查920框。植被盖度3.7%~63.5%,江滩的优势种群为莎草群丛,野艾蒿+辣蓼群丛的平均活螺密度为0只/0.1 m2,较其他群丛差异均有统计学意义(P均<0.01)。土壤温度为19.0~24.0℃,pH为5.0~5.7,湿度为53%~75%,平均活螺数和平均死螺数间差异有统计学意义(P均<0.05)。光照强度因夏强冬弱,活螺分别存在于背光面和迎光面。调查框离水源近的活螺平均数最多,3个距离段(0~1 m,1~3 m和3~5 m)间差异均有统计学意义(P均<0.01)。结论江滩钉螺的生存和分布与植被、土壤、水和光照强度等微生态环境因子有关。
Objective To explore the relationship between the ecological factors such as vegetation, soil, water and light intensity and distribution of Oncomelania snails in the riverside so as to provide basic information for ecological control of Oncomelania hupensis. Methods Three species of plants (species, height, coverage, frequency and strain number), soil characteristics (temperature, humidity, temperature and humidity) of Wuhu section of Changjiang River, pH value) and light intensity, using SPSS 18.0 software for statistical analysis. Results A total of 920 cases were surveyed in three pilot districts. The coverage of vegetation was 3.7% -63.5%. The dominant population of river beach was sedge community. The average live lobe density of wild Artemisia sphaerocephala + Polygonum hydropiper community was 0 /0.1 m2, which was significantly different from other groups (P <0.01). Soil temperature was 19.0 ~ 24.0 ℃, pH was 5.0 ~ 5.7, humidity was 53% ~ 75%, the average number of live snails and the average number of death spiral was statistically significant (P all <0.05). Light intensity Xiaqiang winter weak, live snails exist in the backlight and welcome the light. The average number of live snails near the water source in the survey was the largest, and there were significant differences among the three ranges (0 ~ 1 m, 1 ~ 3 m and 3 ~ 5 m) (all P <0.01). Conclusion The survival and distribution of Oncomelania hupensis are related to microecological environmental factors such as vegetation, soil, water and light intensity.