以塔里木河下游分属于9科16属的21种荒漠植物为对象,调查了它们的植冠种子库情况以及繁殖体的附属物、形状(三维方差)、大小(三维之和)及质量(百粒重)等形态特征,并探讨了各种繁殖体的生态适应对策.结果表明:(1)13种荒漠植物可利用植冠种子库来躲避环境干扰:7种繁殖体具绢毛,2种繁殖体具翅,1种繁殖体具芒,3种繁殖体具冠毛,可利用风力实现传播与定居,而且它们可利用有水时期的速萌特性来适应当地生态输水这一辅助措施;5种繁殖体形状远离球形(三维方差≥0.126),6种繁殖体形状接近圆球形(三维方差<0.06).(2)5种具速萌特性的繁殖体(形状圆筒形、圆锥形和蝌蚪形)与8种具有持久土壤种子库的繁殖体(三维方差较小≤0.1且三维之和≤2.75mm)利用它们互补的生态适应对策使其在研究区成功定居与繁衍;13种以r-型生活史对策为主且粒小质轻的繁殖体(三维之和≤2.75mm,单粒重<1mg)与4种粒大质重的繁殖体(三维之和≥4.8mm,单粒重>3.3mg)利用其互补式繁殖对策将研究区生物多样性维持于一定水平.(3)7~9月份为一年生草本、多年生草本、(半)灌木植物及乔木同时落种的时期,可将人工输水集中于这一时期以实现研...
In this paper we investigated the canopy characteristics of 21 diaspores(belong to 9 families,16 genera)in the lower reaches of Tarim River,analyzed the diaspores morphology,shape(three-dimension varience),size(sum of three-dimension)and weight(100-grain weight)characteristics,etc.The ecological adapting strategies are further probed into.The results show that:(1)There were 13 plants can use canopy to avoid environmental disturbance among the studied 21 desert plants;7 diaspores have hairs,2 diaspores have ...