National Research Council, Institute for Coastal Marine Environment, Via Roma 3, 74123, Taranto, Italy.
Department of Biological and Environmental Sciences & Technologies, University of Salento, 73100, Lecce, Italy.
Environ Sci Pollut Res Int. 2018 Jan;25(2):1784-1799. doi: 10.1007/s11356-017-0599-5. Epub 2017 Nov 4.
The Lesina lagoon (southern Adriatic Sea, Mediterranean) is a coastal lagoon located in a highly intensified farming and tourist area. A monthly sampling was carried out in 1998 in five stations, representative of different hydrological features, in order to analyse phytoplankton composition and its relation to environmental parameters. Our results showed high spatial variability of abiotic variables. Phytoplankton abundances and biomass trends showed marked seasonality, with annual peaks occurring in late winter-early spring and summer periods. Phytoplankton blooms were due to the diatom Thalassiosira pseudonana and the dinoflagellate Prorocentrum cordatum. Statistical analyses showed that salinity and nutrients were the main factors affecting phytoplankton abundance and biomass. Phytoplankton dynamics was associated both to seasonality and the hydrodynamic regime of the system. Moreover, chemical-physical data were analysed together with those collected in the same stations in 2007, to compare their dynamics under different hydrological regimes. The two periods corresponded to the closure and opening, respectively, of canals connecting the lagoon to the sea. In general, abiotic variables (salinity, dissolved oxygen, pH, nitrate, phosphate and silicate concentrations) were significantly affected by the hydrodynamic regime. These data could provide a useful basis to complement the knowledge gained through current monitoring within the framework of the European Directives, as well as to implement conservation and management strategies of these transitional waters.
雷西纳泻湖（亚得里亚海南部，地中海）是一个位于高度集约化农业和旅游区的沿海泻湖。1998 年，在五个具有不同水文特征的代表性站位进行了每月采样，以分析浮游植物的组成及其与环境参数的关系。我们的研究结果表明，非生物变量存在高度的空间变异性。浮游植物丰度和生物量趋势表现出明显的季节性，冬季末到早春和夏季达到年峰值。浮游植物水华是由硅藻拟菱形藻和甲藻夜光藻引起的。统计分析表明，盐度和营养盐是影响浮游植物丰度和生物量的主要因素。浮游植物的动态变化与季节性和系统的水动力状况有关。此外，还分析了化学-物理数据，并将其与 2007 年在同一站位收集的数据进行了比较，以比较不同水动力条件下的动态变化。这两个时期分别对应于泻湖与海洋之间的运河的关闭和开放。总的来说，非生物变量（盐度、溶解氧、pH 值、硝酸盐、磷酸盐和硅酸盐浓度）受到水动力条件的显著影响。这些数据可以为在欧洲指令框架内通过当前监测获得的知识提供有益的补充，并为这些过渡水域的保护和管理策略提供依据。
