Changbai Mountain Transitional Invade Alpine Cause Analysis

The tree-line refers to the highest boundary, forest distribution Timberline is the mountain Vertical band sub-alpine vegetation and alpine vegetation and the boundary, the growth of vegetation types changes took place in the area. Changbai mountain YueHuaLin Timberline is refers to the junction with the tundra in changbai mountain ecological system, occupies an important position. Timberline line for reasons, many studies on invade thought is climate change causes. Changbai mountain overall water hot conditions and climatic conditions are consistent, but the field observation found Timberline go north, changbai mountain with the online invade differs somewhat, for the north, while she gently invasion is different. This pHenomenon, this paper, under the transitional YueHua - tundra vegetation of soil pHysical and chemical properties, it is concluded that the study YueHua - tundra changbai mountain she YueHua vegetation succession diversity of the space law; According to the law, YueHua succession that space mountain YueHuaLin succession go changbai transitional time series; YueHua succession again according to the time sequence of experimental results, use interior of soil properties of soil properties data data, will YueHua vegetation succession with the time series, go out YueHua coupling in changbai mountain vegetation, and the control factor invasion tree-line upshifting mode and the relationship between soil pHysical and chemical properties, final conclusion:(1) field investigations, changbai mountain YueHua - tundra go 1880m - 2230m) transitional (within a stronger ability to live only part of the herb is going to go to invade. Inference, this pHenomenon is subject to global change factors, not with changbai mountain volcanic eruption of vegetation succession after concerned.(2) the experimental analysis of soil pHysical and chemical properties, within that transitional zone with lower altitude and relatively large soil PH. This and ash ingredients have higher anastomosis. So can illustrate the alpine vegetation diversity, should invade with changbai mountain volcanic eruption of vegetation succession after concerned.(3), multiple aspects of direct gradient analysis white mountain birch - tundra vegetation and the transitional undergrowth within five kinds of soil pHysical and chemical properties, the correlation analysis of CCA factor analysis further proof changbai mountain alpine vegetation, and the transitional invasion of changbai mountain volcanic eruption on vegetation succession. But because of CCA analysis and no explanation out all the vegetation factors affecting the invasion of vegetation species (analysis results with environment for the interpretation between quantity with other), and this 79.3% external environment factors.