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Transitions in Land Use Architecture under Multiple Human Driving Forces in a Semi-Arid Zone

机译:人为驱动力下半干旱地区土地利用结构的转变

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The present study aimed to detect the main shifts in land-use architecture and assess the factors behind the changes in typical tropical semi-arid land in Burkina Faso. Three sets of time-series LANDSAT data over a 23-year period were used to detect land use changes and their underpinning drivers in multifunctional but vulnerable ecologies. Group discussions in selected villages were organized for mapping output interpretation and collection of essential drivers of change as perceived by local populations. Results revealed profound changes and transitions during the study period. During the last decade, shrub and wood savannahs exhibited high net changes (39% and ?37% respectively) with a weak net positive change for cropland (only 2%,) while cropland and shrub savannah exhibited high swap (8% and 16%). This suggests that the area of cropland remained almost unchanged but was subject to relocation, wood savannah decreased drastically, and shrub savannah increased exponentially. Cropland exhibited a null net persistence while shrub and wood savannahs exhibited positive and negative net persistence (1.91 and ?10.24), respectively, indicating that there is movement toward agricultural intensification and wood savannah tended to disappear to the benefit of shrub savannah. Local people are aware of the changes that have occurred and support the idea that illegal wood cutting and farming are inappropriate farming practices associated with immigration; absence of alternative cash generation sources, overgrazing and increasing demand for wood energy are driving the changes in their ecosystems. Policies that integrate restoration and conservation of natural ecosystems and promote sustainable agroforestry practices in the study zone are highly recommended.
机译:本研究旨在发现土地利用结构的主要变化,并评估布基纳法索典型热带半干旱土地变化的背后因素。在23年的时间里使用了三组时间序列的LANDSAT数据来检测土地利用的变化及其在多功能但脆弱的生态中的基础驱动力。在所选村庄中组织了小组讨论,以绘制输出解释并收集当地居民所感知的变化的主要驱动力。结果揭示了研究期间的深刻变化和过渡。在过去十年中,灌木和木材大草原的净变化较高(分别为39%和37%),而耕地的净正变化较小(仅2%),而农田和灌木大草原的交换量较高(8%和16%) )。这表明耕地面积几乎保持不变,但要搬迁,木材大草原急剧减少,灌木大草原呈指数增长。农田的净持久性为零,而灌木和大草原的净持久性分别为正和负(1.91和?10.24),这表明向农业集约化方向发展,木材大草原趋于消失,有利于灌木大草原。当地人民意识到已经发生的变化,并支持非法砍伐和耕种是与移民相关的不当耕作方式的想法;在没有替代现金产生来源的情况下,过度放牧和对木材能源的需求不断增长正在推动其生态系统的变化。强烈建议在研究区内整合自然生态系统的恢复和保护并促进可持续农林业实践的政策。

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