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广州市海珠区万亩果园主要生态系统的碳密度及其分配特征

朱苑维1,3,罗婧2,陈玉娟1,3*,黄怡颖2,管东生1,3   

  1. 1中山大学环境科学与工程学院, 广州 510275; 2广州市海珠区环境监测站, 广州 510240; 3广东省环境污染控制与修复技术重点实验室, 中山大学, 广州 510275)
  • 出版日期:2016-01-10 发布日期:2016-01-10

Carbon density and distribution of main ecosystems in Ten-Thousand-Mu Orchard at Haizhu District, Guangzhou.

ZHU Yuan-wei1,3, LUO Jing2, CHEN Yu-juan1,3*, HUANG Yi-ying2, GUAN Dong-sheng1,3   

  1. (1School of Environmental Science and Engineering, Sun Yatsen University, Guangzhou 510275, China; 2 Environmental monitoring Station of Haizhu District in Guangzhou, Guangzhou 510240, China; 3Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yatsen University, Guangzhou 510275, China)
  • Online:2016-01-10 Published:2016-01-10

摘要: 本文选取了广州市海珠区万亩果园的木本生态系统(果园复合湿地、果园和绿地)、草本生态系统(农田)和水生生态系统(河涌)为对象,研究了土壤与植被的碳密度。结果表明:果园复合湿地、果园、河涌、农田和绿地生态系统碳密度为137.12~204.25 t·hm-2,其土壤碳密度为98.45~196.44 t·hm-2,河涌生态系统的底泥碳密度显著高于其他4种陆地生态系统的土壤碳密度(P<0.05);果园复合湿地(73.65 t·hm-2)和果园(61.90 t·hm-2)的植被碳密度显著高于绿地(36.69 t·hm-2)与农田(4.15 t·hm-2)(P<0.05);果园复合湿地、果园和绿地生态系统的植被和土壤碳分配比例为40%~45%和55%~60%,农田生态系统中95.01%的碳分配在土壤层,河涌生态系统的碳99.96%分配在底泥中;在广州城市区域中,以果树植被为主并具有较大湿地面积的万亩果园具有较高的碳密度和碳汇水平。

关键词: 水文序列, 跳跃, 显著水平, 水文变异, 环境变化

Abstract: In this study, we selected three woody ecosystems (orchard wetland, orchard and green space), a herb ecosystem (farmland) and a river ecosystem, which were distributed in the TenThousandMu Orchard at Haizhu District, Guangzhou, to study their vegetation and soil carbon densities. The result showed that the ecosystem carbon densitis of orchard wetland, orchard, river, farmland and green space ranged from 137.49 to 208 t·hm-2, and their soil carbon densities ranged from 98.45 to 196.44 t·hm-2, and the carbon density of river sediment was far higher than that of the soils in the four terrestrial ecosystems (P<0.05). There existed significant differences between the vegetation carbon densities of the four terrestrial ecosystems, with orchard wetland (75.96 t·hm-2) and orchard (65.53 t·hm-2) being much higher than green space (36.69 t·hm-2) and farmland (4.15 t·hm-2) (P<0.05). The vegetation and soil carbon density of orchard, orchard wetland and green space constituted 40%-45% and 55%-60%, respectively, of the total carbon storage, whilst the soil carbon storage accounted for 95.01% of total carbon storage in the farmland, and the carbon of the river ecosystem was mainly distributed in its sediment (99.96%). In urban Guangzhou, the Ten-Thousand-Mu Orchard, a major green area containing large area of wetlands, has a high carbon density and a high level of carbon sequestration.

Key words: hydrological process, significance level, environmental change., hydrological variability, jump