Accumulation of Carbonates Contributes to Coastal Vegetated Ecosystems Keeping Pace With Sea Level Rise in an Arid Region (Arabian Peninsula)

Vincent Saderne, Michael Cusack, Hanan Almahasheer, Oscar Serrano, Pere Masqué, Ariane Arias-Ortiz, Periyadan Kadinjappalli Krishnakumar, Lotfi Rabaoui, Mohammad Ali Qurban, Carlos Manuel Duarte

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Abstract

Anthropogenic sea level rise (SLR) presents one of the greatest risks to human lives and infrastructures. Coastal vegetated ecosystems, that is, tidal marshes, seagrass meadows, and mangrove forests, elevate the seabed through soil accretion, providing a natural coastline protection against SLR. The soil accretion of these ecosystems has never been assessed in hot desert climate regions, where water runoff is negligible. However, tropical marine ecosystems are areas of intense calcification that may constitute an important source of sediment supporting seabed elevation, compensating for the lack of terrestrial inputs. We estimated the long-term (14C-centennial) and short-term (210Pb-20th century) soil accretion rates (SARs) and inorganic carbon (Cinorg) burial in coastal vegetated ecosystems of the Saudi coasts of the central Red Sea and the Arabian Gulf. Short-term SARs (±SE) in mangroves of the Red Sea (0.27 ± 0.22 cm/year) were twofold the SLR for that region since 1925 (0.13 cm/year). In the Arabian Gulf, only mangrove forest SAR is equivalent to local SLR estimates for the period 1979–2007 (0.21 ± 0.09 compared to 0.22 ± 0.05 cm/year, respectively). Long-term SARs are comparable or higher than the global estimates of SLR for the late Holocene (0.01 cm/year). In all habitats of the Red Sea and Arabian Gulf, SARs are supported by high carbonate accretion rates, comprising 40% to 60% of the soil volume. Further studies on the role of carbonates in coastal vegetated ecosystems are required to understand their role in adaptation to SLR.

Original languageEnglish
Pages (from-to)1498-1510
Number of pages13
JournalJournal of Geophysical Research: Biogeosciences
Volume123
Issue number5
DOIs
Publication statusPublished - 1 May 2018

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Arid regions
Carbonates
Sea level
peninsulas
ecosystems
sea level
arid region
Ecosystems
arid zones
carbonates
soils
accretion
Soils
carbonate
Persian Gulf
Red Sea
gulfs
soil
mangrove
mangrove forests

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Saderne, Vincent ; Cusack, Michael ; Almahasheer, Hanan ; Serrano, Oscar ; Masqué, Pere ; Arias-Ortiz, Ariane ; Krishnakumar, Periyadan Kadinjappalli ; Rabaoui, Lotfi ; Qurban, Mohammad Ali ; Duarte, Carlos Manuel. / Accumulation of Carbonates Contributes to Coastal Vegetated Ecosystems Keeping Pace With Sea Level Rise in an Arid Region (Arabian Peninsula). In: Journal of Geophysical Research: Biogeosciences. 2018 ; Vol. 123, No. 5. pp. 1498-1510.
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Saderne, V, Cusack, M, Almahasheer, H, Serrano, O, Masqué, P, Arias-Ortiz, A, Krishnakumar, PK, Rabaoui, L, Qurban, MA & Duarte, CM 2018, 'Accumulation of Carbonates Contributes to Coastal Vegetated Ecosystems Keeping Pace With Sea Level Rise in an Arid Region (Arabian Peninsula)' Journal of Geophysical Research: Biogeosciences, vol. 123, no. 5, pp. 1498-1510. https://doi.org/10.1029/2017JG004288

Accumulation of Carbonates Contributes to Coastal Vegetated Ecosystems Keeping Pace With Sea Level Rise in an Arid Region (Arabian Peninsula). / Saderne, Vincent; Cusack, Michael; Almahasheer, Hanan; Serrano, Oscar; Masqué, Pere; Arias-Ortiz, Ariane; Krishnakumar, Periyadan Kadinjappalli; Rabaoui, Lotfi; Qurban, Mohammad Ali; Duarte, Carlos Manuel.

In: Journal of Geophysical Research: Biogeosciences, Vol. 123, No. 5, 01.05.2018, p. 1498-1510.

Research output: Contribution to journalArticle

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AU - Duarte, Carlos Manuel

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