摘要
本文应用凋落物收集网对海南岛海莲红树群落进行连续4年(1984.1—1987.12)的凋落物动态研究。结果表明:(1)在保护良好的河港海滩上,海莲群落的年凋落物量高达1255g/m^2,是热带地区凋落物量最大的群落类型之一;与世界上红树群落凋落物量相比处于较高水平。(2)4年平均凋落物各组分占总量的比例为叶64.32%、花10.63%、果21.34%、枝3.71%。(3)月凋落物量(Y,g/m^2)与月均气温(X,℃)的回归公式为Y=5.009X-13。18(r=0.44^(**),df=46),相关极显著。(4)不同年份凋落物的变化率R=1.33。
The litter fall of Bruguiera sexangula mangrove community in Hegang Village of Hainan Island has been studied for a period of 4 years form 1984 to 1987.The results showed that. (1) Mean annual litter fall production was 1255 g/m^2 in this well-protected mangrove forest, which is one of the most productive tropical communities in litter production. This amount of litter fall is of a higher level as compared with those of other mangrove forests in the world. (2) The leaf, flower, fruit and twig litter fall proportions in the 4 years were 64.32%, 10.63%, 21.34% and 3.71% respectively. (3) The regression equation of monthly litter fall (Y,g/m^2) and monthly mean air temperature (X,℃) was Y=5.009X-13.18 (r=0.44, dr=46) showing a greatly significant relation. (4) Litter fall yearly fluctuation rate R=1.33.
关键词
红树林
海莲
凋落物
生态特性
Hainan island
Mangrove
Bruguiera sexangula
Litter fall
