广西英罗湾红海榄林凋落物动态及能流量  

Litter Fall Production and Energy Flow Through the Litter of Rhizophora Stylosa Griff. Mangrove Community in Yingluo Bay of Guangxi,China

作　　者：郑逢中[1] 林鹏[1] 卢昌义 郑文教 尹毅[1] 

机构地区：[1]广西师范大学生物系

出　　处：《厦门大学学报（自然科学版）》1996年第3期417-423,共7页Journal of Xiamen University：Natural Science

基　　金：国家教委博士点基金

摘　　要：讨论了红海榄红树群落三年（１９８９－０１～１９９１－１２）逐月凋落物动态及能流量．结果表明：１）红海榄群落年平均凋落物量为７７２ｇ／ｍ２，其中落叶量高达６２４ｇ／ｍ２．凋落物各组分占总量的比例分别为：叶８０．８３％，花２．０９％，果１３．５４％，枝３．５４％．２）不同年份凋落物量变化率（Ｒ）为１．３６．３）月调落物总量（Ｙ，ｇ／ｍ２）与月均气温（ｘ，℃）回归方程为：Ｙ＝４．２７３ｘ＝３４．１３（ｒ＝０．６８６，ｄｆ＝３４），相关极显著，表明大气温度是影响凋落物量的重要因子．４）红海榄年凋落物能流量（三年平均）为１．４０×１０４ｋＪ／ｍ２，这些凋落物能量是邻近河口海湾水生生物的重要能量来源．The present paper deals mainly with the litter fall production and the energy flow through the litter fall of a 70-year-old Rhizophora stylosa Griff. community in Yingluo Bay o f Guangxi from 1989 to 1991. The results showed that: (1)The mean annual litter fall production was 772 g/m2,of which leaf comprised 624 g/m2; The litter fall of leaf,fruit,branch, flower made up 80.83%, 13.54%, 3.54%, 2.09% respectively. (2) The litter fall yearly fluctuation rate (R) was 1. 36. (3) The regression equation of monthly litter fall (Y,g/m2) and monthly mean air temperature (X, ℃) was Y=4. 273 X-34.13 (r=0.686,df=34)showing a very significant correlation. (4) The total.litterfall energy flow was 1.40×104 kJ/m2 a. Among the four litter fractions, leaf contributed the largest proportion with 1.12×104 kJ/m2a (79.9%), fruit 1.99×103 kJ/m2a(14. 2%),flower 306 kJ/m2 a(2.2%) and branch 518 kJ/m2 a (3.7%). This is an important energy source which is available to marine organisms in the aquatic region of the estuary.

关 键 词：广西 红树林 红海榄 凋落动态 能流 

分 类 号：S718.55[农业科学—林学] Q949.761.7[生物学—植物学]