Flora Study of Riparian Plants on the Mountain River Banks of the Jiulongjiang River Headstream

Plant Science Journal Pub Date : 2013-01-01 DOI:10.3724/SP.J.1142.2013.50467

Wei Deng, R. Sun, Xiu-Ming Li, D. Lu, Quan Yang, Kewei Lu

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引用次数: 3

Abstract

Based on field investigation,sample collection,and comprehensive analysis of the riparian vegetation in mountain rivers,the riparian flora characteristics were investigated.The results showed that 574vascular plants belonging to 390genera and 145families in the mountain rivers of the Jiulongjiang River headstream were identified,among which pteridophyte had 29families,54genera and 80species;gymnosperm had 6families,8genera and 10species;and,angiosperm had110families,328 genera and 484 species.Through comprehensive analysis several typical characteristics of the mountain river riparian vegetation(taking reaches of the Jiulongjiang River headstream as an example)were found as follows:(1)a rich floral composition,with the dominant families and genera highly prominent;monotypic,oligotypic and oligotaxic genera,and oligotypic and oligotaxic families formed a large proportion;(2)flora of ancient origin;rare and relict plants were abundant;and,(3)complicated geographical elements and flora connected extensively with most parts of the world fully reflected natural and human disturbance such as regional climate,topography and human activities.Results indicated that the riparian zone had an extremely important function in conserving regional biodiversity.

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九龙江源区山间河岸植物区系研究

通过野外调查、样品采集和综合分析，对山区河流河岸植物区系特征进行了研究。结果表明:在九龙江源头山区河流中共鉴定出维管植物390属145科574种，其中蕨类植物29科54属80种，裸子植物6科8属10种，被子植物110科328属484种。通过综合分析，以九龙江源区为例，发现山地河流河岸植被具有以下几个典型特征:(1)植物组成丰富，优势科和优势属极为突出，单、寡、寡分类属较多，寡、寡分类科占较大比例;(2)植物区系源远流长，珍稀、遗存植物较多;(3)地理要素和区系复杂与世界大部分地区广泛相连，充分反映了区域气候、地形、人类活动等自然和人为干扰。结果表明，河岸带在保护区域生物多样性方面具有极其重要的作用。

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Plant Science Journal

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