Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov Trg 6, HR-10000 Zagreb, Croatia.
Mar Pollut Bull. 2012 Aug;64(8):1537-48. doi: 10.1016/j.marpolbul.2012.05.022. Epub 2012 Jun 15.
The aim of this research was to explore the possibility of a successful and balanced integration of fish farming installations into an ecosystem dominated by Posidonia oceanica (L.) Delile species. We selected light, temperature, seabed topography, sediment characteristics, meadow density, bottom coverage, maximum leaf length and lower depth limit as principle components in assessing the influence of the fish farm. All P. oceanica descriptors showed significant correlation with light deprivation effect while sediment organic matter content revealed slightly higher values than normal, increasing with distance from the cages. The results point to a conclusion that in such lightly nutrient enriched ecosystems, the seagrass growth and distribution are principally controlled by the shadow that cages cast on the seabed below, and that when carefully planned, fish farms do not necessarily degrade the health status of the surrounding area, but in fact facilitate a transition into a secondary stable state.
本研究旨在探索将鱼类养殖设施成功且平衡地融入以波西多尼亚海草（Posidonia oceanica（L.）Delile）为主导的生态系统的可能性。我们选择光、温度、海底地形、沉积物特征、海草草甸密度、底部覆盖度、最大叶长和最低水深限制作为评估养殖活动影响的主要成分。所有波西多尼亚海草描述指标均与光剥夺效应显著相关，而沉积物有机质含量略高于正常值，且随着与网箱距离的增加而增加。研究结果表明，在营养物质轻度富集的此类生态系统中，海草的生长和分布主要受网箱在海底投下的阴影控制，只要精心规划，鱼类养殖不一定会降低周边地区的健康状况，反而实际上有利于向次要稳定状态过渡。
