University of Rostock, Aquatic Ecology, Rostock, Germany.
Mar Pollut Bull. 2023 Sep;194(Pt A):115389. doi: 10.1016/j.marpolbul.2023.115389. Epub 2023 Aug 16.
Coastal zones are permanently under stress by storms, cliff breaks, waves and currents. These events can cause the retreat of the coastline and are currently compensated by beach nourishments. The commonality of these sediment eroding and accumulating processes are turbidity plumes created in coastal waters, increasing the resuspension of particles and possibly nutrient concentrations. To compare sand nourishments and storm events, total suspended solids (TSS) and nutrient measurements were performed during winter season at the German Baltic Sea Coast. A pre-experiment showed that the TSS was homogenous through the water column. There were significant differences between both events, with sand nourishments exceeding the TSS of storms with the factor two. Due to the nourishment mechanism, the relative organic content was lower than during storm events. The nutrient uptake was unsteady. Therefore, sand nourishment can be considered to have more influence on the ecology of sand shores than storm events.
沿海地区常年受到风暴、悬崖崩塌、海浪和海流的影响。这些事件会导致海岸线后退，而目前则通过海滩养护来进行弥补。这些侵蚀和堆积过程的共同之处是在沿海水域形成的浑浊羽流，增加了颗粒的再悬浮和可能的营养物浓度。为了比较沙质补给和风暴事件，在德国波罗的海沿岸的冬季进行了总悬浮固体（TSS）和营养物质的测量。一项预实验表明，TSS 在水柱中是均匀的。两个事件之间存在显著差异，沙质补给的 TSS 是风暴的两倍。由于补给机制，相对有机含量低于风暴事件。营养物质的吸收是不稳定的。因此，与风暴事件相比，沙质补给对沙质海岸的生态可能有更大的影响。
