摘要
通过野外实地调查和文献资料整理,对仁怀市石松类和蕨类植物物种多样性、分布格局、生态类型、区系进行分析.结果表明:仁怀市共有石松类和蕨类植物26科67属269种,其中石松类2科6属16种,蕨类24科61属253种,包括4个仁怀市新记录科、12个仁怀市新记录属、134个仁怀市新记录种;优势科为鳞毛蕨科、凤尾蕨科、蹄盖蕨科和水龙骨科.仁怀市石松类和蕨类植物受地形因素影响较大,东南高山丘陵种类较多,西北河谷坡地种类较少;在垂直分布上呈现出随海拔升高物种数量先增加后减少的趋势,900-1100 m的海拔梯度范围内种类最多,符合"中间膨胀效应".仁怀市石松类和蕨类植物生态类型多样,土生类型最多,石生类和附生类次之,水生类型最少.属的区系分析表明仁怀市的石松类和蕨类植物以热带成分为主.
Abstract
The species diversity,distribution pattern,ecological types,and flora of lycophytes and ferns in Renhuai,Guizhou were analyzed through field investigation and literature review.A total of 269 species were recorded,belonging to 67 genera and 26 families.This included 16 species of lycophytes in 6 genera and 2 families,and 253 species of ferns in 61 genera and 24 families.Among these,four families,12 genera and 134 species were reported from for the first time.The dominant families observed were Dryopteridaceae,Pteridaceae,and Polypodiaceae.The distribution of lycophytes and ferns in Renhuai was greatly affected by terrain factors,with more species found in the mountains and hills in the southeast,and fewer species in the valley slopes in the northwest.The vertical distribution of species showed an increase and then decrease with increasing altitude,with the highest number of species found in the altitude range of 900～1100 m,consistent with the"mid-domain effect".The ecological types of lycophytes and ferns in Renhuai were diverse,with soil types being the most common,followed by lithophytes and epiphytes,and vines and aquatic types being the least common.The flora of the genera shows that the lycophytes and ferns in Renhuai are dominated by tropical components.
基金项目
贵州省科技厅项目(黔科合中引地[2023]029)
仁怀市林业局项目(GZBL-CG22-A[2022-152])
维普
万方数据