文献类型：期刊文献

中文题名：三峡库区秭归段水位消落带草本植物多样性分析

英文题名：Herb Species Diversity in the Water-level-fluctuation Zone in Zigui Section of Three Gorges Reservoir Area

作者：孙鹏飞[1] 沈雅飞[1,2] 王丽君[1] 杨邵[1] 郭燕[1] 肖文发[1,2] 程瑞梅[1,2]

第一作者：孙鹏飞

机构：[1]中国林业科学研究院森林生态环境与保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,江苏南京210037

年份：2020

卷号：33

期号：6

起止页码：96-104

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家重点研发计划子课题“三峡水库消落带生态恢复技术研究”(2017YFC050530402);中央级公益性科研院所基本科研业务费专项资金“‘长江经济带’生态保护技术集成与应用”(CAFYBB2017ZA002)。

语种：中文

中文关键词：消落带;草本植物;重要值;多样性;生活型

外文关键词：water-level-fluctuation zone;vegetation;importance value;species diversity;life type

分类号：Q145

摘要：[目的]研究消落带草本植物多样性的梯度变化和空间分布特征,进而认识消落带植物的生态适应性,为分析和保护消落带生物多样性提供依据。[方法]通过对三峡库区秭归段消落带145~175 m内草本物种的调查,对经历5次干湿动态变化后消落带草本植物的群落类型及物种多样性进行研究。[结果]表明:2014年该区共有草本植物39种,隶属15科27属,以菊科、禾本科、廖科和大戟科植物为主;2019年该区共有草本植物47种,隶属18科39属,菊科种类最多,为消落带优势科,其次为禾本科、廖科和大戟科植物。在过去5年中,1年生草本植物毛马唐、狗尾草、稗、苍耳、鬼针草和多年生草本植物狗牙根、香附子等均有较大的重要值,为主要优势物种,秭归消落带植物群落优势种和伴生种的丰富度、多样性、均匀度和优势度在各水位梯度带上变化明显,群落物种丰富度随水位高程梯度145~175 m呈先上升后下降的趋势。[结论]消落带植物多样性的变化是由于高程差异造成的淹水时间差异而导致的生境差异。
[Objective]To study the spatial pattern and gradient variation of herb species,and then to understand the ecological adapatability of plants,so as to provide data for further understanding and maintaining the biodiversity in water-level-fluctuation zone.[Method]Based on survey of water-level-fluctuation site of Zigui Section of the Three Gorges Reservoir Area,the composition and plant community diversity of herbaceous species and their spatial pattern and gradient variation were investigated continuously from 2014 to 2019 on the transect with elevation 145-175 m above sea-level.[Result]The results showed that there were 39 herb species in total in 2014,belonging to 27 genera of 15 families.Gramineae,Compositae,Polygonaceae and Euphorbiaceae were the dominant families.There were 47 herb species belonging to 39 genera of 18 families in the water-level-fluctuation zone in 2019.The top dominant family was Compositae,followed by Gramineae,Euphorbiaceae,and Polygonaceae.The dominant species such as Digitaria sanguinalis,Setaria viridis,Echinochloa crusgalli,Xanthium sibiricum,Bidens pilosa,Cynodon dactylon,Cyperus rotundus were of high importance value over the five years.In addition,there was an obvious variation in species richness,community diversity,evenness and dominance along the distance gradient.The richness of community species followed a up-down trend on the elevation from 145 to 175 m above sea-level.[Conclusion]The results of study suggests that the variation of herb species diversity in the study area is originated from the habitat difference induced by the difference in the flooding time caused by different elevation.