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首页> 外文期刊>Marine ecology >Recolonization patterns of benthic assemblages after relict sand dredging in the central Tyrrhenian sea
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Recolonization patterns of benthic assemblages after relict sand dredging in the central Tyrrhenian sea

机译：依赖于雷尔嫩海中央疏忽砂沙后底栖组件的重新播放模式

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摘要

Recolonization patterns of benthic assemblages after relict sand dredging were investigated in an area offshore of Capo d'Anzio (central Tyrrhenian Sea). Surveys were performed before, during, and after dredging in 2007. Sampling stations were located within and outside the dredging site in water depths between 40 and 56 m. Defaunation due to sand extraction was the main impact observed in the inner stations and in stations located in proximity of the dredging site. At the inner stations, 9 months after dredging, a significant increase in species richness and diversity was observed: the sediment removal led to an increase of the sandy sediment fraction, favouring the settlement of sabulicolous species. A decrease in number of individuals and species was also observed in most of the outer stations, probably due to fine sediment redeposition. Recolonization of macrobenthic assemblages was essentially achieved at inner stations both in terms of abundance and species richness, while at outer stations it was still in progress. Results of this study, providing a picture of recovery times and processes in the Tyrrhenian Sea, could be used to develop predictions of the effects of future offshore sand dredging projects in comparable areas. Monitoring programs and research have a key role to provide a more detailed overview of biological recovery processes and times in different regions and with different dredging intensity.
机译：在Capo d'Anzio（Tyrrhenian中央海洋中央）的近海近岸研究了封闭砂疏浚后的底栖组合的重新组织模式。在2007年疏浚之前，期间和之后进行调查。采样站位于疏浚部位内外，在40至56米之间的水深。由于沙子提取引起的除尘是在内部站和位于疏浚部位附近的车站中观察到的主要影响。在疏浚后9个月的内部站，观察到物种丰富性和多样性的显着增加：沉积物去除导致砂泥浆分数的增加，有利于蜂窝状物种的沉降。在大多数外部站也观察到个体数量和物种的减少，可能是由于细沉积物重新定位。在丰富和物种丰富方面，内部车站基本上在内部站点达到了大规模化合物的重组，而在其仍在进行的外部。本研究的结果，提供了培养时报和流程中的恢复时间和流程，可用于开发对未来海上砂疏浚项目在可比较区域中的影响的预测。监测计划和研究具有关键作用，以便更详细地提供不同地区的生物恢复过程和时间以及不同的疏浚强度。

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