利川绝迹莼菜种群原因分析

Analysis of the Extinct Causes of Brasenia schreberi Population in Lichuan

分析了利川绝迹莼菜群落的基本特征和所在地的生境特征,并研究了利川绝迹莼菜濒危的因素,即:人类活动如耕作、污水排放和过度开发利用,生境片断化、破碎化以及在物种竞争中处于劣势。

The basic characteristics and habitat characteristics of extinct Brasenia schreberi community in Lichuan were surveyed.The endangered causes of extinct Brasenia schreberi in Lichuan were studied as follows：human activities such as farming,run-off of water pollution,and excessive exploitation,fragmental habitat and its disadvantages in the species competition.