海南岛河港海莲红树林凋落物动态的研究

 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／m2，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／m2)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。

STUDY ON DYNAMICS OF LITTER FALL OF BRUGUIERA SEXANGULA MANGROVE IN HAINAN ISLAND, CHINA

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/m2 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/m2) and monthly mean air temperature (X,℃) was Y=5.009X–13.18 (r=0.44, df= 46) showing a greatly significant relation. (4) Litter fall yearly fluctuation rate R= 1.33.