The coastal protection and blue carbon benefits of hybrid mangrove living shorelines.

Autor: Morris RL; National Centre for Coasts and Climate, School of BioSciences, The University of Melbourne, VIC, 3010, Australia. Electronic address: rebecca.morris@unimelb.edu.au., Fest B; National Centre for Coasts and Climate, School of BioSciences, The University of Melbourne, VIC, 3010, Australia., Stokes D; Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia., Jenkins C; NSW Department of Primary Industries (Fisheries), Nelson Bay, NSW, 2315, Australia., Swearer SE; National Centre for Coasts and Climate, School of BioSciences, The University of Melbourne, VIC, 3010, Australia.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2023 Apr 01; Vol. 331, pp. 117310. Date of Electronic Publication: 2023 Jan 20.
DOI: 10.1016/j.jenvman.2023.117310
Abstrakt: Hybrid living shorelines use a combination of engineered structures with natural ecosystems to achieve coastal protection and habitat restoration outcomes, with added co-benefits such as carbon sequestration. Rock fillets constructed along eroding estuarine banks are designed to accumulate sediment, establish mangroves, and stabilise the shoreline. There is, however, a lack of data to support whether rock fillets are achieving these goals. We used a chronosequence of rock fillets to determine their effect on mangrove development, bank stabilisation and carbon sequestration in four estuaries in New South Wales, Australia. Aboveground biomass and adult density increased with age of rock fillets, and mangrove structure was similar to a natural fringing mangrove after 15 years. The rock fillets accumulated sediment, which reduced the eroded estuary bank height, however, little effect of the fillets on bank slope was observed. Sediment carbon stocks were not different between rock fillets, eroding estuary banks and natural fringing mangroves. Rock fillet design had a significant effect on mangrove structure and coastal protection function, with greater wave transmission through lower rock fillets, suggesting design optimisation is needed. As the construction cost of the rock fillets was equal or less than traditional rock revetments, where suitable they present a more economic and environmentally sustainable solution to estuarine erosion management.
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 © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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