Department of Lesina (FG), National Research Council-Institute of Marine Science, Via Pola 4, 71010, Lesina, FG, Italy.
Environ Monit Assess. 2010 Jan;160(1-4):237-56. doi: 10.1007/s10661-008-0691-x.
The aims of this study were to analyse sediment characteristics and macrobenthic assemblages in two very close Italian coastal lagoons (Lesina and Varano) and to assess the different behaviour between the two basins and the relationship between sediment matrix and benthic organisms within and between the two lagoons. The comparative study was performed in July 2007 at 13 sampling sites in Lesina lagoon and 15 sites in Varano basin for sediment grain size, total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP) and macrobenthic structure analyses. Both lagoons were generally dominated by fine-grained sediments (clay and silt components). The average contents of TOC and TN measured in Lesina was higher than in Varano (3.31% vs 2.52% for TOC and 5,200 microg.g(-1) vs 3,713 microg.g(-1) for TN); in contrast, the TP was lower (540 microg.g(-1) vs 620 microg.g(-1)). Based on macrobenthic community patterns, the central zone in Varano lagoon and the eastern area in Lesina lagoon were characterised by the lowest abundance (168.7 ind.m(-2) and 503.2 ind.m(-2), respectively) and by the lowest number of species, as highlighted by the diversity indices (Shannon-Wiener, H' range was 0.47-1.45 for Lesina and 0.00-1.68 for Varano; Margalef species richness, d range was 0.00-1.67 for Lesina lagoon and 0.00-2.38 for Varano basin). Ordination diagrams suggested an influence of marine and freshwater inputs on the sediment distribution in Varano lagoon and on macrobenthic assemblages in Lesina lagoon.
本研究旨在分析两个非常接近的意大利沿海泻湖（Lesina 和 Varano）的沉积物特征和底栖生物群落，并评估两个盆地之间的不同行为以及两个泻湖内部和之间的沉积物基质和底栖生物之间的关系。比较研究于 2007 年 7 月在 Lesina 泻湖的 13 个采样点和 Varano 盆地的 15 个采样点进行，用于分析沉积物粒度、总有机碳 (TOC)、总氮 (TN)、总磷 (TP) 和底栖生物结构。两个泻湖通常以细粒沉积物（粘土和粉砂成分）为主。Lesina 中测量的 TOC 和 TN 的平均含量高于 Varano（TOC 为 3.31%，而 TN 为 2.52%；TN 为 5200μg.g(-1)，而 TN 为 3713μg.g(-1)）；相反，TP 较低（540μg.g(-1)，而 620μg.g(-1)）。基于底栖生物群落模式，Varano 泻湖的中心区和 Lesina 泻湖的东部地区以最低的丰度（分别为 168.7 ind.m(-2)和 503.2 ind.m(-2)）和最低的物种数为特征，这一点在多样性指数（Shannon-Wiener，H' 范围为 0.47-1.45，Lesina 为 0.00-1.68，Varano；Margalef 物种丰富度，d 范围为 0.00-1.67，Lesina 泻湖为 0.00-2.38，Varano 盆地）中得到了突出体现。排序图表明，海洋和淡水输入对 Varano 泻湖的沉积物分布和 Lesina 泻湖的底栖生物群落有影响。
