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Citation:

Effect of Site Types on Carbon Storage of Natural White Birch Forest Ecosystem in Changbai Mountains, Northeast China

  • Received Date: 2014-12-20
  • The effect of site types on the ecosystem carbon storage (vegetation and soil), net primary productivity (NPP) and annual net carbon sequestration (ANCS) of natural white birch (Betula platyphylla Suk.) forests were measured on seven site types (the top, middle, and bottom of the sunny slope and shady slope, and the valley floor) using relative growth equations and carbon/nitrogen analytical approach in Changbai Mountains, Northeast China. The results are as follows. (1) The vegetation carbon storage (45.61 87.22 t·hm-2) of natural white birch forests took on the upper and middle of shady slope and the valley > the upper and middle of sunny slope, and the lower of shady slope > the lower of sunny slope, which the high site types were significantly higher (50.8% 91.2%, PP>0.05). (2) The soil organic carbon storage (66.71 158.51 t·hm-2) took on the upper of sunny slope, the middle of shady slope and the valley > the lower and middle of sunny slope, and the lower of shady slope > the upper of shady slope, which the high site types were significantly higher (99.3% 137.6%, PP>0.05). (3) The ecosystem carbon storage (139.44 231.12 t·hm-2) took on the middle of shady slope and the valley > the upper of sunny slope and the lower of shady slope > the lower and the middle of sunny slope, and the upper of shady slope, which the high site types were significantly higher (35.6% 65.7%, PP>0.05) than the low site type. (4) The NPP and ANCS of the white birch forests(4.92 11.25 t·hm-2·a-1 and 2.32 5.32 t·hm-2·a-1) all took on the upper and middle of shady slope > the upper and lower of sunny slope, the lower of shady slope, and the valley > the middle of sunny, which the high site types were significantly higher (42.5% 128.7% or 45.2% 129.3%, P<0.05) than the low and medium site type, and the medium site types were 10.6% 56.3% or 14.2% 53.4% higher than the low site type, but only the lower of shady slope had significant difference with it. Therefore, the ecosystem carbon storage and carbon sequestration capacity of natural birch forests were strongly influenced by the site types in Changbai Mountains, and the site differentiation regularity should be considered in the evaluation of the carbon sink function.
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Effect of Site Types on Carbon Storage of Natural White Birch Forest Ecosystem in Changbai Mountains, Northeast China

  • 1. Center for Ecological Research, Northeast Forestry University, Harbin 150040, Heilongjiang, China
  • 2. Baihe Forestry Bureau, Yanji 133613, Jilin, China
  • 3. Dunhua Forestry Bureau, Yanji 133700, Jilin, China

Abstract: The effect of site types on the ecosystem carbon storage (vegetation and soil), net primary productivity (NPP) and annual net carbon sequestration (ANCS) of natural white birch (Betula platyphylla Suk.) forests were measured on seven site types (the top, middle, and bottom of the sunny slope and shady slope, and the valley floor) using relative growth equations and carbon/nitrogen analytical approach in Changbai Mountains, Northeast China. The results are as follows. (1) The vegetation carbon storage (45.61 87.22 t·hm-2) of natural white birch forests took on the upper and middle of shady slope and the valley > the upper and middle of sunny slope, and the lower of shady slope > the lower of sunny slope, which the high site types were significantly higher (50.8% 91.2%, PP>0.05). (2) The soil organic carbon storage (66.71 158.51 t·hm-2) took on the upper of sunny slope, the middle of shady slope and the valley > the lower and middle of sunny slope, and the lower of shady slope > the upper of shady slope, which the high site types were significantly higher (99.3% 137.6%, PP>0.05). (3) The ecosystem carbon storage (139.44 231.12 t·hm-2) took on the middle of shady slope and the valley > the upper of sunny slope and the lower of shady slope > the lower and the middle of sunny slope, and the upper of shady slope, which the high site types were significantly higher (35.6% 65.7%, PP>0.05) than the low site type. (4) The NPP and ANCS of the white birch forests(4.92 11.25 t·hm-2·a-1 and 2.32 5.32 t·hm-2·a-1) all took on the upper and middle of shady slope > the upper and lower of sunny slope, the lower of shady slope, and the valley > the middle of sunny, which the high site types were significantly higher (42.5% 128.7% or 45.2% 129.3%, P<0.05) than the low and medium site type, and the medium site types were 10.6% 56.3% or 14.2% 53.4% higher than the low site type, but only the lower of shady slope had significant difference with it. Therefore, the ecosystem carbon storage and carbon sequestration capacity of natural birch forests were strongly influenced by the site types in Changbai Mountains, and the site differentiation regularity should be considered in the evaluation of the carbon sink function.

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