辽宁老秃顶子南坡植物生活型谱及其海拔变化

The characteristics of plant life form spectra and its variation along elevation gradients in the southern slope of Mt. Laotudingzi, Liaoning Province

基于研究区植物名录和野外样线调查统计数据，采用Raunkiaer生活型分类系统，对辽宁老秃顶子南坡植物生活型谱及其随海拔高度的变化特征进行分析研究．结果表明：（1）老秃顶子南坡植物生活型组成以地面芽植物为主，占40．8％；其次是高位芽植物和1年生植物，分别占21．8％和21．5％，隐芽植物也较多，占14．5％，地上芽植物很少，仅占1．4％．该生活型谱总体上反映了本区夏季温暖多雨、冬季寒冷且漫长的气候特点；（2）老秃顶子南坡植物群落的生活型谱随海拔高度的变化特征为：山麓～海拔1180m，随着海拔的升高，群落中中型高位芽植物比例明显增大，而地面芽植物比例明显减小；海拔1180m～山顶，随着海拔的升高，群落中中型高位芽植物比例明显减小，小型高位芽植物比例明显增大，至山顶高位芽植物基本消失，而地面芽植物比例则由9．1％显著增加到山顶的76．3％．

Based on the Enumeration in this area and the researching data from the field transect inventory ,this paper studies the Life form spectrum in the plant of the southern slope of Mt. Laotudingzi which in Liaoning province and the different characteristics due to the altitude gradient, using the Raunkiaer＇s plant life form system. We have got two results： （1）The Life form spectrum in the plant of the southern slope of Mr. Laotudingzi is composed largely of Hemicryptophytes which is 40.8% of all. Phanerophytes and Therophytes take the second place holding 21.8% and 21.5% respectively. Cryptophytes is 14.5%, and Chamaephytes is the least of all holding 1.4%. All of the above show that the characteristics of climate there are rainy and warm in summer,and frigid and long in winter. （2）The characteristics of Life form spectrum in the plant of the southern slope of Mt. Laotudingzi are as followings： The proportion of medium-sized Phanerophytes in the commun and the proportion of Hemicryptophytes obviously decreases with the altitude h 1 180 m. However, the proportion of medium-sized Phanerophytes in the decreases and the proportion of minitype-sized Phanerophytes in the commun with the altitude higher from 1 180 m to the peak . The Phanerophytes almost ty obviously increases gher from piedmont to community obviously ty obviously increases disappear on the peak and the proportion of Hemicryptophytes increases from 9.1% to 76.3 % obviously.