RT info:eu-repo/semantics/article
T1 Trends in the Recent Evolution of Coastal Lagoons and Lakes in Galicia (NW Iberian Peninsula)
A1 Fraga-Santiago, Pedro
A1 Gómez Pazo, Alejandro
A1 Pérez-Alberti, Augusto
A1 Montero, Pablo
A1 Otero Pérez, Xose Lois
A2 Geografia Fisica
K1 Geografía
K1 Coast
K1 Lakes
K1 Lagoons
K1 Sediment
K1 Wetlands
K1 Geographic information system
K1 Marine protected area
K1 Galicia
K1 2505.07 Geografía Física
AB [EN] Coastal lagoons are habitats of great environmental value. However, they are currently subject to major threats, particularly due to increasing sea levels. This study aims to identify changes—both natural and induced by anthropic activity—and their impact on the recent evolution of three different types of coastal lagoons in Galicia (Louro, Vixán, and Xuño). The application of information obtained through laser imaging detection and ranging (LiDAR) techniques suggests that the outer limits of the three lagoon systems have not experienced any relevant changes in the last 60 years (i.e., no occupation of the lagoon area has been identified). However, the internal configuration of these wetland areas has experienced some alterations. A generalized increase in the area occupied by macrophytic communities (Phragmites australis, Scirpus maritimus, Juncus maritimus, etc.) has been observed. Image interpretation by geographic information systems (GIS) and field surveys suggest that the area currently occupied by macrophytes experienced a 7% to 63% increase at the expense of the free water body. This loss of flooded area is consistent with the increase in sedimentation rates associated with the convergence of several causes, such as the abandonment of traditional macrophyte biomass harvesting and agricultural activities around the lagoons, the expansion of riparian forests, and sediment contributions by erosion due to recurrent forest fires within the drainage basins of each lagoon. Finally, water and sediment composition suggest that, of the three studied lagoons, two of them (Louro and Vixán) are included within the definition of “coastal lagoons” (habitat code 1150) by the Habitats Directive (Directive 92/43/EEC), while the Xuño lagoon should be considered a “natural eutrophic lake” (habitat code 3150).
PB MDPI
LK https://hdl.handle.net/10612/21254
UL https://hdl.handle.net/10612/21254
NO Fraga-Santiago, P., Gómez-Pazo, A., Pérez-Alberti, A., Montero, P., & Pérez, X. L. O. (2019). Trends in the recent evolution of coastal lagoons and lakes in Galicia (NW Iberian Peninsula). Journal of Marine Science and Engineering, 7(8). https://doi.org/10.3390/JMSE7080272
DS BULERIA. Repositorio Institucional de la Universidad de León
RD Jul 7, 2024