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西藏昌都地区森林植被碳储量及空间分布格局

任德智1,葛立雯2,王瑞红1,张娜3,潘刚3*
  

  1. 1西藏大学农牧学院高原生态研究所, 西藏林芝 860000; 2毕节市农业科学研究所, 贵州毕节 551700; 3西藏大学农牧学院资源与环境学院, 西藏林芝 860000)
  • 出版日期:2016-04-10 发布日期:2016-04-10

Carbon storage and spatial pattern of forest vegetation in Changdu, Tibet.

REN De-zhi1, GE Li-wen2, WANG Rui-hong1, Zhang Na3, PAN Gang3*   

  1. (1 Institute of Tibet Plateau Ecology, Agricultural and Animal Husbandry College, Tibet University, Linzhi 860000, Tibet, China;2 Bijie Institute of Agricultural Sciences, Bijie 551700, Guizhou, China; 3 Department of Resources and Environment, Agricultural and Animal Husbandry College, Tibet University, Linzhi 860000, Tibet, China)
    .
  • Online:2016-04-10 Published:2016-04-10

摘要: 基于昌都地区第6次二类森林资源清查数据资料,运用生物量转换因子法进行生物量估算,以藏东南实测含碳率与国内含碳率的相关研究相结合,确定不同树种的含碳率,在此基础上,估算了昌都地区的森林碳储量和碳密度,并探讨其空间分布格局。结果表明:昌都地区的森林总碳储量约为1.058×108 t,平均碳密度为67.31 t·hm-2,均低于林芝地区;各森林类型碳储量在4.5×102~8.21×107 t,以云杉林的碳储量占绝对优势,为昌都地区的77.82%,碳密度则在19.88~81.16 t·hm-2;从龄组来看,以成、过熟林碳储量为主,占总森林碳储量的77.91%,各龄组碳密度随年龄增加呈近直线增加趋势;从森林碳储量和碳密度的分布格局来看,森林碳储量呈以左贡县最高,丁青县最低,“三江”南部区为高森林碳储量区,“三江”中游区为低森林碳储量区,“三江”上游区为中等森林碳储量区的总体分布格局;总体上,森林碳密度则呈以东北部江达县为最高,东南部的芒康县为最低,“三江”上游区平均碳密度最高,“三江”南部区次之,“三江”中游区最低,但空间分布差异相对较小(60.55~74.41 t·hm-2)。

关键词: 土壤微生物群落, 土壤酶活性, 模拟增温, 磷脂脂肪酸, 高山森林

Abstract: According to the data of the 6th Category Ⅱ Forest Resources Inventory in Changdu, we utilized the method of biomass expansion factor (BEF) to calculate the biomass. On the basis of combining the measurement of carbon content in the southeast of Tibet with related research in China, the carbon content of different tree species was determined, meanwhile the carbon storage, carbon density of forest and their spatial distribution pattern in Changdu were estimated. The results showed that the total carbon storage of forest in Changdu was about 1.058×108 t, and the average carbon density was 67.31 t·hm-2, being lower than that in Linzhi. The carbon storage of all forest types varied from 4.5×102 to 8.21×107 t. The carbon storage of spruce forest occupied 77.82% of the total carbon storage in Changdu. The carbon density of all forest types was 19.88-81.16 t·hm-2. From the age group, the carbon storage of mature and overmature forests occupied 77.91% of the total carbon storage of forest, and the carbon density of each age group increased with age. From the overall distribution pattern of forest carbon storage and carbon density, the forest carbon storage was the highest in Zuogong County, and the lowest in Dingqing County; the southern “Sanjiang” had the highest forest carbon storage, followed by the “Sanjiang” upstream region, and the lowest was found in the middle reaches of the “Sanjiang”. Forest carbon density was the highest in the Jomda County (in northeastern Changdu), and the lowest in Mangkang County (in southeastern Changdu). The distribution pattern showed that the upper reaches of the “Sanjiang” had the higher average carbon density, followed by the southern region of “Sanjiang”, and the middle reaches of “Sanjiang” had the lowest. However, the difference of spatial distribution of carbon density was relatively small (60.55-74.41 t·hm-2).

Key words: phospholipid fatty acid (PLFA), alpine forest, soil enzyme activity, soil microbial community, simulated warming