Please use this identifier to cite or link to this item:
Title: Insights of long-term geomorphological evolution of coastal landscapes in hot-spot oceanic islands
Authors: Ferrer-Valero, Nicolas 
Hernández-Calvento, Luis 
Hernández-Cordero, Antonio I. 
UNESCO Clasification: 5404 Geografía regional
Keywords: Landscape evolution
Coastal landforms
Canary Islands
Issue Date: 2019
Publisher: 0197-9337
Project: Caracterización de Procesos Socio-Ecológicos de Los Sistemas Playa-Dunas de Canarias Como Base Para Su Gestión Sostenible 
Análisis de Procesos Naturales y Humanos Asociados A Los Sistemas Playa-Duna de Canarias 
Journal: Earth Surface Processes and Landforms 
Abstract: The Canary Islands form a volcanic archipelago in which a west–east (W–E) chain of progressively older and less ac-tive islands can be observed. In the Canary Islands, unlike most hot-spot archipelagos, certain geodynamic peculiarities have pro-moted longer periods of island survival, exceeding 20 Myr. This factor makes these islands a suitable context for this work, whichaims to analyze extensively the coastal geomorphic structure on islands with different development states. For this, three islandsin different volcanic phases were selected: La Palma (1.8 Myr), Gran Canaria (14.5 Myr) and Fuerteventura (22.6 Myr). Anad hoclandform-based hierarchical taxonomy was designed to analyze the coastal geomorphic structure of the three islands. Based on amulti-sourced analysis in geographic information system (GIS) and field recognition, a comprehensive cartographic database wascollected using the coastline data-storing (CDS) method as a feature abundance proxy. Three different aspects of the geomorpholog-ical structure were compared and related between the islands: (i) composition, (ii) abundance and (iii) diversity. Through their com-parison, we attempt to explore geomorphological aspects of coastal evolution over geological spatiotemporal scales. Compositionwas explored analyzing the distribution of the feature’s longshore frequencies (p). Abundance, by metrics of local abundance(N∩) and whole density (NU). Diversity, through four indices: normalized richness (S) and Margalef index (M) to estimate richness;Simpson index (D) and Shannon index (H’) to estimate evenness. We identified a systematic transformation in the dominant landformcomposition and a systematic trend in increasing geomorphological abundance and diversity from younger to older islands. The re-sults show a long-term structural pattern defined by the increase in coastal geomorphic complexity (abundance and diversity) overgeological time, as the coasts evolve from predominantly rocky-erosive to increasingly clastic-depositional environments. This long-term geomorphological pattern may be a general aspect of hot-spot island archipelagos, which can bring a new perspective to theknowledge of their coastal evolution. © 2018 John Wiley & Sons, Ltd.
ISSN: 0197-9337
DOI: 10.1002/esp.4518
Source: Earth Surface Processes and Landforms[ISSN 0197-9337], v. 44(2), p. 565-580
Appears in Collections:Artículos
Show full item record


checked on Apr 11, 2021

Page view(s)

checked on Apr 18, 2021

Google ScholarTM




Export metadata

Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.