中国红树林北缘区不同起源秋茄林碳储量比较研究

Comparative Studies on the Carbon Storage Between the Kandelia candel Natural Forests and Plantations in North Mangrove Forests of China

对红树林自然分布区域北缘区不同起源(天然林和人工林)秋茄林湿地生态系统的碳储量及分配格局进行对比分析。结果表明:(1)秋茄天然林生态系统碳储量(乔木层+林下植被+死地被物+土壤碳)约为221.8 t/hm2,人工林约为154.6 t/hm2,秋茄天然林生态系统在碳汇功能上优于人工林;(2)无论天然林还是人工林生态系统,土壤是主要碳库,分别占总碳储量87.0%和93.5%;乔木层碳储量次之(天然林12.8%;人工林6.5%),林下植被和死地被物对生态系统碳储量贡献微小,仅0.01%～0.12%;(3)与林外土壤碳库相比,红树林湿地碳库更具优势。

The carbon storage an d carbon allocation patterns of natural and artificial Kandelia candel wetland ecosystem were investigated in north marginal region of mangrove.The results were as follows：（1）The ecosystem’s carbon stock（tree layer＋understory＋litter floor＋soil）was about 221.8 t/hm in the K.candel natural forests,while that of the plantations was 154.6 t/hm2.We primarily concluded that the carbon stock in the natural forests was higher than that in the plantations;（2）The carbon pool in the soil was the main resource of ecosystem’s carbon storage of both K.candel natural forests and plantations,whose respective amounts were 87.0% and 93.5%.The carbon stock of tree layer was on the second place（natural forests： 12.8%;plantations： 6.5%）and the least contribution to the stock of carbon was attributed to the understory and litter floor,which was only 0.01% to 0.12%;（3）Compared with the soil carbon pools outside the forest,the superiority of wetland ecosystem of K.candel mangrove is obvious.