中国岩溶Issue(1)：9-16,8.DOI:10.11932/karst20150102
贵州茂兰板寨水域水生植物δ13C特征及光合作用固定HCO-3碳量估算
Characteristics ofδ1 3 C in typical aquatic plants and carbon sequestration by plant photosynthesis in the Banzhai catchment,Maolan of Guizhou Province
摘要
Abstract
Aquatic plants play a key role in study of the carbon cycle by using inorganic carbon as a source for photosynthesis.The object of this work is to figure out the contribution of aquatic vegetations to carbon se-questration with the Banzhai catchment in Guizhou as study area.The biomass of typical aquatic plants both in summer and winter was measured.Meanwhile,theδ1 3 C of 4 kinds of aquatic plants,which grew at sam-pling sites,were tested.The results show that the biomass in summer is less than that in winter.Besides, the obtained values ofδ1 3 C for emergent aquatic plants range from -33.59 ‰ to -27.05 ‰,with an aver-age of -30.32 ‰,for floating plants from -35.45 ‰ to -24.62 ‰,with an average of -29.96 ‰,re-spectively,and for submerged plants it was measured a value of -27.89 ‰.The meanδ1 3 C values of various plants in descending order are emergent plants,floating plants,and submerged plants.Additional to this re-sults the double-meta model was used,by this model the percentage of HCO -3 uptake from water by aquat-ic photosynthesis can be estimated.The calculated HCO -3 carbon consumption by photosynthesis was 1 9.52 tC/(a·km2 ),HCO -3 used by aquatic plants for photosythesis accounted for almost 47.84 % of the total uesd inorganic carbon in Banzhai river,and this part of HCO -3 was converted into organic carbon and fixed in aquatic plants.The results indicate that the contribution of aquatic plants to carbon sequestration,especially to the net carbon sink estimation in karst regions cannot be neglected.关键词
水生植物/固碳量/δ13C特征/溶解无机碳/碳汇Key words
aquatic plants/carbon sequestration/δ1 3 C value/dissolved inorganic carbon/carbon sink分类
天文与地球科学引用本文复制引用
李瑞,于奭,孙平安,何师意,原雅琼,熊志斌..贵州茂兰板寨水域水生植物δ13C特征及光合作用固定HCO-3碳量估算[J].中国岩溶,2015,(1):9-16,8.基金项目
地质调查项目(12120113005100) （12120113005100）
国家自然科学基金(41402324,41402238) （41402324,41402238）
广西自然科学基金(2014GXNSFBA118228) （2014GXNSFBA118228）
中国地质科学院岩溶地质岩溶所所控基金(201320,201429) （201320,201429）
国土资源部/广西岩溶动力学重点实验室开放基金(14-B-03) （14-B-03）
