植被恢复是重建亚高山地区生态平衡的重要途径。植被覆盖的变化代表,在某种程度上,植被的生长趋势,是不同自然因素和人类活动的复杂结果。微地形通过影响到达地面的热量和水分来影响植被的生长,这一作用在亚高山地区更为明显。然而,很少有研究关注不同微地形类型的植被恢复特征和动态。驱动亚高山地区植被变化的因素各自的重要性还不清楚。我们使用线性回归和Hurst指数分析了自2000年以来不同微地形类型的植被恢复和可持续性趋势,基于植被覆盖分数(FVC),并通过使用地理探测器确定了植被变化的潜在驱动因素及其重要性。结果表明:(1)研究区域的FVC自2000年以来呈上升趋势,上升速度为0.26/年(P=0.028)。它将从改进到退化,47.48%的区域持续下降或持续显著下降,在未来。(2)平均FVC的顺序如下:较低的斜率(冷),下坡,下坡(暖),山谷,上坡(暖),上坡,山谷(狭窄),上坡(冷),cliff,山/分水岭,峰/脊(温暖),峰/脊,峰/脊(冷)。下坡为植被覆盖最好的微地形类型。山脊是最难绿化的。(3)影响亚高山地区植被恢复的主要因素有方面,微地形类型,和土壤分类学大群体。多因素之间的相互作用对植被覆盖的影响比单因素大得多。温度和方面的影响对植被覆盖变化影响最大。自然因素对研究区植被恢复的影响大于人为因素。这项研究的结果可以有助于更好地了解不同驱动因素对植被覆盖变化的影响,为亚高山地区典型伐木区植被恢复和可持续发展提供相应的参考和建议。
Vegetation restoration is an essential approach to re-establish the ecological balance in
subalpine areas. Changes in vegetation cover represent, to some extent, vegetation growth trends and are the consequence of a complex of different natural factors and human activities. Microtopography influences vegetation growth by affecting the amount of heat and moisture reaching the ground, a role that is more pronounced in
subalpine areas. However, little research is concerned with the characteristics and dynamics of vegetation restoration in different microtopography types. The respective importance of the factors driving vegetation changes in
subalpine areas is also not clear yet. We used linear regression and the Hurst exponent to analyze the trends in vegetation restoration and sustainability in different microtopography types since 2000, based on Fractional Vegetation Cover (FVC) and identified potential driving factors of vegetation change and their importance by using Geographical Detector. The results show that: (1) The FVC in the region under study has shown an up-trend since 2000, and the rate of increase is 0.26/year (P = 0.028). It would be going from improvement to degradation, continuous decrease or continuous significant decrease in 47.48% of the region, in the future. (2) The mean FVC is in the following order: lower slope (cool), lower slope, lower slope (warm), valley, upper slope (warm), upper slope, valley (narrow), upper slope (cool), cliff, mountain/divide, peak/ridge (warm), peak/ridge, peak/ridge (cool). The lower slope is the microtopographic type with the best vegetation cover, and ridge peak is the most difficult to be afforested. (3) The main factors affecting vegetation restoration in
subalpine areas are aspect, microtopographic type, and soil taxonomy great groups. The interaction between multiple factors has a much stronger effect on vegetation cover than single factors, with the effect of temperatures and aspects having the most significant impact on the vegetation cover changes. Natural factors have a greater impact on vegetation restoration than human factors in the study area. The results of this research can contribute a better understanding of the influence of different drivers on the change of vegetation cover, and provide appropriate references and recommendations for vegetation restoration and sustainable development in typical logging areas in
subalpine areas.