Which concrete substrate suits you? Ostrea edulis larval preferences and implications for shellfish restoration in Europe
| Autor: | Mohamed Boutouil, Aurélie Fabien, Stephane Pouvreau, Théo Guillet, Samuel Chaudemanche, Nassim Sebaibi, Helene Cochet, Marine Potet, Sonia Gachelin |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Oyster
Environmental Engineering Ostrea edulis Larval recruitment Artificial reef 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Ecosystem engineer biology.animal 14. Life underwater Seashell by-products Reef 0105 earth and related environmental sciences Nature and Landscape Conservation geography geography.geographical_feature_category biology 04 agricultural and veterinary sciences biology.organism_classification Fishery Habitat destruction Habitat Restoration 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Oyster reef restoration Concrete |
| Zdroj: | Ecological Engineering (0925-8574) (Elsevier), 2021-04, Vol. 162, P. 106159 (13p.) |
| Popis: | The European flat oyster, Ostrea edulis, is an important ecosystem engineer that has been progressively disappearing from European coasts over the last century mainly due to overexploitation, habitat degradation and disease. It is now the subject of many conservation and restoration programs throughout Europe, including the Flat Oyster REcoVERy (FOREVER) project in France. Protecting and managing the remaining populations has become a nature conservation priority because this species is able to build biogenic reefs, very specific habitats that provide many ecosystem functions and services. The availability of suitable hard substrates for larval fixation is a critical factor during this reef-building process. Although natural substrates are in short supply, production and deployment is an easy step to help oyster reef restoration. The present study was carried out to improve artificial reef design and the composition of the concrete used to build them, focusing on the impact of concrete formulation and surface texture on larval settlement in the field. Nine bio-sourced concrete formulations and ten surface textures were evaluated. The number of settled larvae counted on each concrete substrate reflected their preferences, and results demonstrated that microscale surface texture has a greater impact on recruitment than concrete formulation, with larvae preferring to settle in depressions on a rough rock-like texture and avoiding flat, horizontal and exposed areas. Physical and mechanical properties of the different formulations were also evaluated. Although they had almost no impact on recruitment, these results could be helpful for artificial reef-building (in terms of 3D design, durability, manufacture and deployment) and guide choices of materials that should be used and the proportion and granulometry of incorporated shells to obtain the best surface texture. |
| Databáze: | OpenAIRE |
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