摘要
长喙毛茛泽泻（Ｒａｎａｌｉｓｍａｒｏｓｔｒａｔｕｍ）是一种极度濒危的水生小草本植物，目前仅中国湖南省茶陵县尧水乡湖里沼泽（北纬２６°５０′，东经１１３°４０′）还残存少许。该种的濒危机制表现在２个尺度上。从大的尺度看，该种在演化地位上较原始，可能处于系统演化的衰亡阶段，易发生正常灭绝；从小的尺度看，该种种子苗存活率低，种群竞争能力差，种群扩散困难，这样一些内在原因加上外部环境的破坏（如农药污染、翻挖、养鱼等），使得该种濒危。保护好长喙毛茛泽泻首先必须尽快保护好原生境，并实施一定的干扰，人为创造适当小生境；其次可进行迁地保护和组织培养工作。
analisma rostratum, an endangered species, is a perennial aquatic rosular herb. At present, in Huli marsh (26°50′ N, 113°40′ E), Chaling county, Hunan Province, China, there are a few R rostratum yet. Two main causes can explain why R rostratum is endangered. One is this species may be at the period of decadence in phylogeny. The other, because the seedling survival rate is low, competition ability is weak, population is difficult to spread and the habitat is disturbed (eg biocide pollution, turning over soil, feeding fish et al.). To protect this species, we have to protect its habitats, create some 'bare soil' and aid with ex situ conservation and tissue culture.
出处
《湖北农学院学报》
1997年第1期28-32,共5页
Journal of Hubei Agricultural College
基金
国家自然科学基金
关键词
长喙毛茛泽泻
濒危机制
保护措施
Ranalisma rostratum
endangered causes
protection methods
