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Citation:

The Effect of Forest Marsh and Fire Disturbance on Soil Microbial in Greater Xing'an Mountain

  • Received Date: 2015-06-03
  • [Objective]The aim of this paper was studied the characteristic of soil microbiological community and its diversity at forest marsh development and fire disturbance, to understand the role of soil microbial community in the forest marsh conservation and restoration.[Methods]We used phospholipid fatty acids (PLFAs) to portrait the community composition and community level physiological profiles (CLPP) to describe the functional diversity of the microbial community. [Results]Total of 5 types of marsh were chosen in Natural reserve area of Nanwenhe in Greater xing'an Mountain, which included xing'an Larch-Ledum palustre-moss marsh, xing'an Larch-xing'an azalea-moss marsh, xing'an Larch-birch-carex marsh, and Larch-xing'an azalea-moss marsh by severe fire disturbance, xing'an Larch-birch-carex marsh by mild fire disturbance at 2006. It was found that the PLFAs of 16:00(16.29±5.62 nmol·g-1), 18:1ω8t(9.89±8.61 nmol·g-1)and 16:1ω7c(9.79±3.24 nmol·g-1)were dominance in microbial community, and the dominant species contributed significantly to variations in soil microbial biomass, especially Gram positive bacteria (cy19:0), Fungi(18:2ω6c) and Methane oxidizing bacteria(18:1ω8t). The rate of normal saturated fatty acid and monounsaturated fatty acid increased, and significantly increased after the interference of fire(p(pα-D-Lactose=2.87 p=0.080, FL-Threonine=3.00 p=0.078), and all of Tween 80, D-Mannitol, D-glucosaminic Acid were significantly difference by utilization of soil fungi(FTween 80=2.75 p=0.088, FD-Mannitol =3.53 p=0.047, FD-glucosaminic Acid=4.67 p=0.022),but the functional diversity of microbial community had not been effected by both the type of marsh and fire disturbance. [Conclusion]soil microbial biomass was correlated with the development stage of the marsh, and the soil microbial community structure was changed with the development stage of the marsh and fire disturbance. Soil bacteria and fungi were selective in the use of carbon resource.
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The Effect of Forest Marsh and Fire Disturbance on Soil Microbial in Greater Xing'an Mountain

  • 1. Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091
  • 2. Institute of Heilongjiang Provincial Monitoring and Planning of Forestry, Harbin 154080, Heilongjiang
  • 3. The Administration Bureau of Jiuwan Mountain National Natural Reserve, Liuzhou 545300, Guangxi
  • 4. Research Institute of Agriculture and Forestry, Greater xing'an Forestry Group, Jiagedaqi 165000, Heilongjiang

Abstract: [Objective]The aim of this paper was studied the characteristic of soil microbiological community and its diversity at forest marsh development and fire disturbance, to understand the role of soil microbial community in the forest marsh conservation and restoration.[Methods]We used phospholipid fatty acids (PLFAs) to portrait the community composition and community level physiological profiles (CLPP) to describe the functional diversity of the microbial community. [Results]Total of 5 types of marsh were chosen in Natural reserve area of Nanwenhe in Greater xing'an Mountain, which included xing'an Larch-Ledum palustre-moss marsh, xing'an Larch-xing'an azalea-moss marsh, xing'an Larch-birch-carex marsh, and Larch-xing'an azalea-moss marsh by severe fire disturbance, xing'an Larch-birch-carex marsh by mild fire disturbance at 2006. It was found that the PLFAs of 16:00(16.29±5.62 nmol·g-1), 18:1ω8t(9.89±8.61 nmol·g-1)and 16:1ω7c(9.79±3.24 nmol·g-1)were dominance in microbial community, and the dominant species contributed significantly to variations in soil microbial biomass, especially Gram positive bacteria (cy19:0), Fungi(18:2ω6c) and Methane oxidizing bacteria(18:1ω8t). The rate of normal saturated fatty acid and monounsaturated fatty acid increased, and significantly increased after the interference of fire(p(pα-D-Lactose=2.87 p=0.080, FL-Threonine=3.00 p=0.078), and all of Tween 80, D-Mannitol, D-glucosaminic Acid were significantly difference by utilization of soil fungi(FTween 80=2.75 p=0.088, FD-Mannitol =3.53 p=0.047, FD-glucosaminic Acid=4.67 p=0.022),but the functional diversity of microbial community had not been effected by both the type of marsh and fire disturbance. [Conclusion]soil microbial biomass was correlated with the development stage of the marsh, and the soil microbial community structure was changed with the development stage of the marsh and fire disturbance. Soil bacteria and fungi were selective in the use of carbon resource.

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