Hypersaline tidal flats (apicum ecosystems): the weak link in the tropical wetlands chain

• Published in: Environmental reviews Vol. 22; no. 2; pp. 99 - 109
• Main Authors: Albuquerque, Antonia Gislaine Brito Marques, Ferreira, Tiago Osório, Cabral, Raiana Lira, Nóbrega, Gabriel Nuto, Romero, Ricardo Espíndola, Meireles, Antônio Jeovah de Andrade, Otero, Xosé Lois
• Format: Journal Article
• Language: English
• Published: NRC Research Press 01.06.2014
• Subjects: battures salines; ecosystem formation; Environmental aspects; estuaires tropicaux semi-arides; Forest soils; formation des écosystèmes; formation du sol; Lentic systems; Littoral ecosystems; Mangrove soils; Pedogenesis; Salt marshes; saltflats; Sedimentary soils; Sediments; Soil ecology; soil formation; Soil pollution; Tidal marshes; tropical semiarid estuaries; Wetland soils; Brazil
• ISSN: 1181-8700; 1208-6053
• DOI: 10.1139/er-2013-0026

Hypersaline tidal flats (HTFs) are transitional ecosystems commonly occurring in arid and (or) semiarid coastal regions. These ecosystems typically border mangrove forests. Hypersaline tidal flats perform important functions related to the maintenance of coastal biodiversity as well as support socioeconomic and cultural activities in local communities. Despite their importance, HTFs are rarely studied, especially with regard to the understanding of their formation and function. From the premise that the knowledge on the formation of HTF and soil contribute to the understanding of ecological relationships occurring in these ecosystems, a review is presented. Flat topography, coastal dynamics, pronounced hydric deficit, limited frequency, and duration of tidal flooding are the key factors for the formation of these coastal wetlands. The active pedogenetic processes (salinization, gleyzation, sulfidization, and bioturbation) are highly influenced by these factors and present important ecological roles, specifically in regards to carbon and nutrient dynamics. This review presents evidence for the necessity of further studies on the ecological relationships in HTFs, as well as determining the ecological connection between HTFs and other wetlands. Filling this knowledge gap is essential if we are to improve public policies and conservation laws on the protection of all coastal ecosystems.