University of Crete, Biology Department, 70013 Heraklion, Crete, Greece.
University of Crete, Biology Department, 70013 Heraklion, Crete, Greece; Hellenic Centre for Marine Research, Institute of Oceanography, 71003 Heraklion, Crete, Greece.
Sci Total Environ. 2017 Dec 15;605-606:637-645. doi: 10.1016/j.scitotenv.2017.06.239. Epub 2017 Jul 1.
A mesocosm experiment was performed to study benthic-pelagic coupling under a eutrophication gradient. Nine mesocosms were deployed in the facilities of the Hellenic Center for Marine Research in Crete, in the Eastern Mediterranean. The mesocosms were 4m deep, containing 1.5m of coastal water and, at the bottom, they included 85l of undisturbed sediment, collected from a semi-impacted area in the port of Heraklion, Crete. A eutrophication gradient was created by adding nutrients in the water column (Low and High) and the experiment lasted 58days. Water column and sediment environmental variables were measured at regular intervals. The results indicate that sedimentation caused by eutrophication in the water column affected sediment geochemical variables but in most cases a time lag was observed between the trophic status of the water column and the response of the sediment. Additionally, in the High eutrophication treatment, several fluctuations were observed and the system did not recover within the experimental duration, as opposed to the Low treatment which showed fewer fluctuations and signs of recovery.
开展了一项中观实验，以研究富营养化梯度下的底栖-水层耦合。在克里特岛的希腊海洋研究中心的设施中部署了九个中观模型，这些中观模型深 4 米，包含 1.5 米的近岸水，在底部，它们包括 85 升来自克里特岛赫拉克利翁港半受影响区域的未扰动沉积物。通过在水柱中添加营养物质（低和高）来创建富营养化梯度，实验持续了 58 天。定期测量水柱和沉积物环境变量。结果表明，水柱中的富营养化导致的沉降影响了沉积物地球化学变量，但在大多数情况下，在水柱的营养状况和沉积物的响应之间观察到时间滞后。此外，在高富营养化处理中，观察到了几个波动，而系统在实验期间没有恢复，与低处理形成对比，低处理显示出较少的波动和恢复迹象。
