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Title: Biogeomorphological responses of nebkhas to historical long-term land uses in an arid coastal aeolian sedimentary system
Authors: Marrero Rodríguez, Néstor 
García Romero, Leví Aday 
Peña Alonso, Carolina Priscila 
Hernández Cordero, Antonio Ignacio 
UNESCO Clasification: 250607 Geomorfología
250604 Geología ambiental
250507 Geografía física
2511 Ciencias del suelo (Edafología)
Keywords: Land uses
Environmental changes
Historical ecology
Maspalomas, et al
Issue Date: 2020
Project: Análisis de Procesos Naturales y Humanos Asociados A Los Sistemas Playa-Duna de Canarias 
Journal: Geomorphology 
Abstract: Coastal dunes have received growing attention in recent years because of the ecosystem services they provide and the high anthropic pressure that they have historically been subjected to and continue to endure. Such pressure especially affects arid dune fields where any changes are more noticeable due to their natural dynamics. The aimof this paper is to analyze the relationship between the degradation of an arid aeolian sedimentary system (El Médano, Tenerife, Spain) due to historical long-term land uses and its subsequent biogeomorphological evolution. The methodology combines historical sources (historical documents, aerial and common photographs and oral sources) and current ones (orthophotos, LiDAR data and field work). In order to analyze the response of the system to these uses, 8 plots were chosen in which 3 different historical land uses had resulted in the total or partial elimination of the vegetation and landforms. Biogeomorphological variables were measured on 461 nebkhas in these plots. The main results show that the historical land uses studied in this paper (aerodrome, aggregate extraction and crop cultivation) modified the entire system, with changes observed in the topography, vegetation cover and sediment availability for transport. Changes in topography and distance from shore were important factors in its recovery capacity. This research contributes to our understanding of the different aeolian sedimentary dynamics that can be detected in the same dune field (especially with nebkha landforms) and is of particular importance for making appropriate environmental management decisions to facilitate the recovery of the ecosystem.
ISSN: 0169-555X
DOI: 10.1016/j.geomorph.2020.107348
Source: Geomorphology [ISSN 0169-555X], v. 368, (Noviembre 2020)
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