Grupo de Geografía Física y Medio Ambiente, Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, ULPGC, Spain.
Grupo de Geología Aplicada y Regional, Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, ULPGC, Spain..
Sci Total Environ. 2020 May 10;716:137087. doi: 10.1016/j.scitotenv.2020.137087. Epub 2020 Feb 3.
Coastal areas worldwide are undergoing major changes and degradation due to a set of combined natural and anthropogenic stressors. In arid aeolian sedimentary systems these changes can be even more acute given their sensitivity to perturbances in landscape dynamics. While in many such areas recent (20 year) observations have been made regarding measurable differences in dune coverage and stability, few studies have assessed and quantified the long-term relationships of transitioning exploitation and land-use changes in order to fully evaluate their importance. Land management, therefore, does not always benefit from the more holistic picture that a combined deeper time historical ecology and geographical approach provides and can contribute to decision making. The Jandía isthmus, in Fuerteventura (Canary Islands, Spain) presented an ideal field laboratory in which to assess these phenomena in actual conditions and test a combined methodology using historical and current sources (historical documents, aerial photographs, orthophotos, LiDAR data, field work and oral sources). By doing so, different phases of land exploitation associated with changing land ownership were identified and the consequences of each on the dune system assessed. It is concluded that the transition from traditional land uses (livestock and fuel extraction) to more recent ones (aggregate extraction, construction of new roads and urban-touristic resorts, and some recreational uses) has altered aeolian sedimentary transport, inducing stabilization of the landforms, as well as producing significant changes in the vegetation. The wider application of this type of study can benefit the many other areas worldwide that are facing similar pressures.
由于一系列自然和人为压力因素的综合作用，世界范围内的沿海地区正在经历重大变化和退化。在干旱的风成沉积系统中，由于其对景观动态变化的敏感性，这些变化可能更为剧烈。虽然在许多这样的地区，最近（20 年）已经对沙丘覆盖和稳定性的可测量差异进行了观测，但很少有研究评估和量化过渡性开发和土地利用变化的长期关系，以便充分评估其重要性。因此，土地管理并不总是受益于更全面的情况，而这种情况需要结合更深入的时间历史生态学和地理学方法来提供，并有助于决策制定。在西班牙富埃特文图拉岛的兰萨罗特岛，杰安迪亚地峡提供了一个理想的实地实验室，可以在实际条件下评估这些现象，并测试使用历史和当前来源（历史文献、航空照片、正射影像、激光雷达数据、实地工作和口头来源）的综合方法。通过这样做，确定了与土地所有权变化相关的不同土地开发阶段，并评估了每一阶段对沙丘系统的影响。研究结果表明，从传统土地利用（畜牧业和燃料开采）向最近的土地利用（骨料开采、新道路和城市旅游度假区的建设以及一些娱乐用途）的转变改变了风成沉积物的输运，导致地貌的稳定化，以及植被的显著变化。在全球范围内，许多面临类似压力的其他地区都可以广泛应用这种类型的研究。
