感潮区鱼类生境适宜度与水环境因子的响应关系分析

Analysis of the Response Relationship between Fish Habitat Suitability and Water Environmental Factors in Tidal Areas

摘要: 选取逛荡河感潮区，设置3个监测点，于春季对该区域进行一个感潮周期的水质监测。同时选定1号监测点于2019年1月至2019年10月，分春夏秋冬四个季节进行水质监测，进行水质分析与鱼类生境模拟。结果显示，各样点DO范围在7.4~14.59 mg/L，NH₃-N范围在0.15~48 mg/L。从季节差异分析DO呈现出春季 > 秋季 > 冬季 > 夏季的趋势，NH3-N呈现出冬季 > 春季 > 夏季 > 秋季的趋势。成鱼期鲈鱼对感潮区整体生境适宜度较为乐观，适宜度指数基本集中于0.375~0.45，且变化规律与感潮变化相似。不同季节的成鱼期鲈鱼适宜度指数集中在0.35~0.6，且春季和秋季整体低于其他季节。

Abstract: The tide-sensitive area of Guangdang River was selected and three monitoring points were set up to monitor the water quality of the area for one tide-sensitive cycle in spring. At the same time, monitoring point No. 1 was selected to conduct water quality monitoring in four seasons from January 2019 to October 2019, spring, summer, autumn and winter, for water quality analysis and fish habitat simulation. The results showed that DO at each site ranged from 7.4~14.59 mg/L and NH₃-N ranged from 0.15~48 mg/L. The DO showed a trend of spring > autumn > winter > summer, and NH₃-N showed a trend of winter > spring > summer > autumn from the seasonal difference analysis. The suitability index was basically concentrated in the range of 0.375~0.45, and the changing pattern was similar to that of the tide sensing area. The suitability indices of adult perch in different seasons were concentrated in 0.35~0.6, and the overall suitability indices in spring and autumn were lower than those in other seasons.