珠江口红树群落钙的累积和循环研究  

A STUDY ON CALCIUM ACCUMULATION AND CYCLING OF MANGROVE COMMUNITIES AT THE PEARL RIVER MOUTH

作　　者：宋建阳[1] 张汝国[1] 赵丽荷[1] 

机构地区：[1]广州大学理学院地理系,广东广州510405

出　　处：《热带地理》2002年第2期171-175,共5页Tropical Geography

摘　　要：在测定珠江口红树群落生物量和生产力的基础上 ,进一步测定红树群落各组分的钙含量 ,计算群落钙的贮量、年存留量、年归还量、年吸收量、周转期和富集率 ,以了解珠江口红树群落钙元素的累积和循环状况。结果表明 ,珠江口 5个红树群落钙的贮存总量为 197～ 6 4 0 1kg/hm2 ,平均为 382 4kg/hm2 ;年存留量为 2 0 3～ 5 8 6kg/hm2 ·a,平均为 39 3kg/hm2 ·a;年归还量为 2 4 1～ 75 5kg/hm2 ·a ,平均为 4 4 9kg/hm2 ·a ;年吸收量为 4 4 4～ 134 1kg/hm2 ·a ,平均为 84 2kg/hm2 ·a ;周转期为 7～ 10a,平均 8a ;存留率为 4 3 7%～ 5 2 7% ,平均 4 6 7% ,归还率为4 7 3%～ 5 6 3% ,平均 5 3 3%。乔木型红树群落较灌丛型红树群落有较高的存留率和较低的归还率。On the Basis of the results from the measurement of the biological amount and productivity of the mangrove communities at the Pearl River mouth, the authors take a further measurement of their calcium content, Ca storage, annual values of retention, return and uptake, their turnover periods and enrichment ratio, thus providing a scientific basis for the protection and utilization of the mangrove resources there. The results are as follows: Total amount of Ca content is 197～640 1 kg/hm 2, with an average of 382 4 kg/hm 2; annual value of retention 20 3～58 6 kg/hm 2·a with an average of 39 3 kg/hm 2·a; annual value of return 24 1～75 5 kg/hm 2·a, and average 44 9 kg/hm 2·a; annual value of uptake 44 4～134 1 kg/hm 2·a and average 84 2 kg/hm 2·a; turnover period 7～8 a and average 8 a; retention rate 43 7%～52 7% and average 46 7%; return rate 47 3%～56 3% and average 53 3%.

关 键 词：红树林 钙 累积 生物循环 珠江口 生物量 生产力 

分 类 号：Q948[生物学—植物学]