Relationship between Light, Temperature, Soil Wetness and Vegetation at Landscape Scale in a Subalpine Belt of Mt. Xiaowutai
Received date: 2004-01-15
Revised date: 2005-05-12
Online published: 2005-07-25
Supported by
National Natural Science Foundation of China, No.40371043; No.40071002; BNU Scientific Creation Team
In this paper, the aridity indexes of different habitats in Mt. Xiaowutai were calculated through measuring the effective temperature by means of sugar inversion method, and simulating direct solar radiation and soil wetness index supported by DEM and GIS tools. Furthermore, the relationship between vegetation distribution pattern and the above factors in the study area was analyzed by ANOVA at the landscape scale. The results showed: 1) the values of direct solar radiation, effective temperature and aridity indexes at the forest habitats were significantly lower than those at the subalpine meadow habitats, while the value of soil wetness index appeared an inverse tendency; 2) the aridity indexes, defined as the ratio of either effective temperature or solar radiation to soil wetness index, could interpret the distribution pattern of forest and meadow vegetation better than the effective temperature or soil wetness itself only; and 3) the aridity indexes played a leading role in the distribution patterns of forest and subalpine meadow in the study area, which was consistent with the principle followed by the horizontal distribution pattern of forest and steppe vegetation in a regional scale.
JIANG Yuan, HUANG Xiaoxia, HUANG Qiuru, LIU Quanru, HAN Jingsha . Relationship between Light, Temperature, Soil Wetness and Vegetation at Landscape Scale in a Subalpine Belt of Mt. Xiaowutai[J]. Acta Geographica Sinica, 2005 , 60(4) : 698 -704 . DOI: 10.11821/xb200504019
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