Abstract:
Marine aggregate extraction represents an opportunity to face the depletion of terrestrial aggregate resources. The environmental effects of this activity have been assessed in several studies, leading to the formulation of recommendations to mitigate its effects. This study investigates its environmental impacts in a coarse, high-current environment with low-intensity extraction, a unique scenario not extensively studied before. Employing multivariate analyses and a trophic group approach, it examines complex responses at both species and community levels. Results indicate a decline in biodiversity, promoting the establishment of r-selected species, particularly filter feeders. Although site restoration timelines remain uncertain, initial indications suggest rapid recovery (2-3 years) for this site. The study also discusses methodological challenges in sampling these low-intensity dredged sites and emphasizes the need for new indices tailored to this pressure and coarse sediments under strong hydrodynamics. These insights offer valuable directions for future research.
摘要:
海洋骨料的开采代表了面对陆地骨料资源枯竭的机会。这项活动的环境影响已经在几项研究中进行了评估,导致制定建议以减轻其影响。这项研究调查了其对环境的影响,低强度提取的高电流环境,一个以前没有广泛研究过的独特场景。采用多变量分析和营养组方法,它考察了物种和群落层面的复杂反应。结果表明生物多样性下降,促进r选择物种的建立,特别是过滤器喂食器。尽管现场恢复时间表仍然不确定,初步迹象表明,该地点迅速恢复(2-3年)。该研究还讨论了对这些低强度疏浚地点进行采样的方法学挑战,并强调需要针对这种压力和强流体动力学下的粗沉积物量身定制的新指标。这些见解为未来的研究提供了有价值的方向。