黄河干流河岸带C_4植物群落特征及其对水库生态效应的指示  

Riparian C_4 Plants on the Mainstream of the Yellow River:Assemblage Characteristics and Their Indication on the Effects of Reservoirs

作　　者：张晓可[1,2] 王海军[1] 茹辉军[1,2] 赵伟华[1,2] 

机构地区：[1]中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,武汉430072 [2]中国科学院研究生院,北京100049

出　　处：《武汉植物学研究》2010年第5期568-576,共9页Journal of Wuhan Botanical Research

基　　金：水利部公益性行业科研专项基金资助项目(2007SHZ1-19)

摘　　要：于2008年9月16日至10月31日对黄河干流河岸带植物群落开展了系统调查。共采集高等植物124种,分属于32科、97属,其中C4植物9科、24属、34种,占科、属、种总数的28%、25%和27%。对该区域的研究结果还表明:(1)C4植物主要分布于单子叶植物纲的禾本科和莎草科,两者共占C4植物总种数的61%。(2)从上游到下游C4植物种数递增,但中游C4/C3比、C4植物密度和生物量要明显高于上游和下游。(3)C4植物种数及C4/C3比与海拔、年均气温、年均降水量及年均流量均有相关关系,C4植物生物量仅和年均降水量显著相关。(4)水库位置的C4/C3比要明显高于其临近样区,说明C4植物对水库干扰下河岸带植被的动态变化具有一定的指示作用。We conducted an investigation into the plant assemblage of the Yellow River＇s mainstream between September 16th and October 31st,2008.The total of 34 C4 plant species were recorded,belonging to 9 families and 24 genera,which corresponded to 27%,28% and 25% of the total species,families,and genera respectively.Further analyses indicated that：（1）Gramineae and Cyperaceae were the dominant taxa in the area,contributing 61% of the C4 plants in species number.（2）The number of C4 plant species increased from the upper to the lower reaches of the river,while the standing crops and the C4/C3 ratio in the middle reaches were higher than those in the upper and lower reaches.（3）The number of C4 plant species and C4/C3 ratio were correlated with altitude,annual air temperature,precipitation,and discharge,while the biomass of C4 plants only had a significant correlation with annual precipitation.（4）The C4/C3 ratio in the reservoir region was higher than that in adjacent regions,which suggests this ratio may be an indication of vegetation dynamics under the disturbance of reservoirs.

关 键 词：C4植物 C4/C3比 水库效应 黄河 

分 类 号：Q948.11[生物学—植物学]