Does coastal armoring affect biodiversity and its functional composition on sandy beaches?

Autor: Laurino IRA; Oceanographic Institute, University of São Paulo (USP), Praça do Oceanográfico, 191, CEP: 05508-120, São Paulo, SP, Brazil. Electronic address: ivanlaurino@usp.br., Checon HH; Oceanographic Institute, University of São Paulo (USP), Praça do Oceanográfico, 191, CEP: 05508-120, São Paulo, SP, Brazil; Department of Animal Biology, State University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, 13083-862, Campinas, SP, Brazil., Corte GN; Oceanographic Institute, University of São Paulo (USP), Praça do Oceanográfico, 191, CEP: 05508-120, São Paulo, SP, Brazil; Escola do Mar, Ciência e Tecnologia, Universidade do Vale do Itajaí, CEP 88302-202, Itajaí, Santa Catarina, Brazil., Turra A; Oceanographic Institute, University of São Paulo (USP), Praça do Oceanográfico, 191, CEP: 05508-120, São Paulo, SP, Brazil.
Jazyk: angličtina
Zdroj: Marine environmental research [Mar Environ Res] 2022 Nov; Vol. 181, pp. 105760. Date of Electronic Publication: 2022 Sep 28.
DOI: 10.1016/j.marenvres.2022.105760
Abstrakt: Sandy beaches are increasingly squeezed due to the construction of backshore man-made structures (i.e., coastal armoring) and current global changes. Coastal armoring impacts beach sediment dynamics, inducing erosion and habitat loss, threatening biodiversity processes and the functional roles of sandy beach organisms. Here, we examine how the abundance, taxonomic richness, and functional richness of sandy beach fauna are affected by coastal armoring. We compared macrobenthic infaunal communities on five armored beaches (with backshore urban structures) and five vegetated beaches (not-armored). We also evaluated the abundance and biomass of upper-beach arthropods using pitfall traps, comparing armored and vegetated segments within the beaches. Infaunal richness and abundance were lower at armored beaches, mainly in the subtidal zones, because of a reduction in polychaete and molluscan abundance. There was no difference in overall functional richness between the armored and vegetated beaches. Nevertheless, we found that functional groups such as small suspension feeders were more associated with armored beaches, while large-bodied species and predators were more frequent at vegetated beaches. Pitfall traps showed that coastal armoring also reduced the abundance of the upper-beach coleopteran Phaleria testacea, leading to a loss of biomass. Therefore, our data suggest that coastal armoring can influence the functional composition of sandy beach biodiversity and significantly impact macrobenthic abundance and biomass.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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