珠海淇澳岛人工次生无瓣海桑纯林的植被碳储量变化

The Biological Carbon Storage Change of Artificial Secondary Sonneratia apetala on Qi’ao Island,Zhuhai

为了研究无瓣海桑在快速固碳方面的效果,基于多期遥感影像和实测样方数据,对1999—2019年期间,淇澳岛无瓣海桑的生长范围、年际生物量和植被碳储量进行了定量计算,分析引起这些变化的原因,并得到研究区生物量反演模型为B=75.906-6.144×SR-10.728×Variance,P<0.01,R^(2)=0.700。研究结果表明:(1)无瓣海桑在1999、2003、2009、2013、2019年的面积分别为0、29.520、114.245、140.280、332.399 hm^(2);1999、2003、2009、2013、2019年的碳储量分别为0、4872.74、15051.14、25892.55、55969.24 t,1999—2003、2003—2009、2009—2013、2013—2019年的固碳速率分别是:3.66、7.55、19.48、28.06 t/(hm^(2)·a);20年间,无瓣海桑纯林的单位面积碳密度增长了168.38 t/hm^(2)。(2)与其他红树林树种和同纬度的亚热带阔叶林相比,无瓣海桑的固碳速率更快,碳储量更大,是一种非常理想的能够用于修复裸地海岸的红树林植物。

The growth range,interannual biomass and biological carbon storage of Sonneratia apetala on Qi ao Island from 1999 to 2019 was quantitatively calculated on the basis of multi-period remote sensing images and field-measured sample data to research the effect of fast carbon fixation of Sonneratia apetala and the reasons for the changes were analyzed.The biomass inversion model of the study area was obtained:B=75.906-6.144×SR-10.728×Variance,where P<0.01,R 2=0.700.As the results show,the area of Sonneratia apetala in 1999,2003,2009,2013 and 2019 were 0,29.520,114.245,140.280 and 332.399 hm^(2) respectively;the carbon stocks in 1999,2003,2009,2013 and 2019 were 0,4872.74,15051.14,25892.55,55969.24 t respectively;the carbon sequestration rates from 1999 to 2003,2003 to 2009,2009 to 2013 and 2013 to 2019 are 3.66,7.55,19.48,28.06 t/(hm^(2)·a)respectively;and the carbon density per unit area of Sonneratia apetala has increased by 168.38 t/hm^(2) in the past 20 years.Compared with other mangrove species and subtropical broad-leaved forests at the same latitude,Sonneratia apetala is an ideal mangrove plant with faster carbon sequestration rate and greater carbon storage and can be used to restore bare land coasts.