Dipartimento di Chimica e Farmacia, Università di Sassari, Via Piandanna 4, 07100 Sassari, Italy.
ARPAT - Agenzia Regionale per la Protezione Ambientale della Toscana, Via Marradi 114, 57126 Livorno, Italy.
Mar Pollut Bull. 2021 Apr;165:112106. doi: 10.1016/j.marpolbul.2021.112106. Epub 2021 Feb 4.
The increase of the intensity and frequency of rainfall-dominated flood is considered a main effect of climate change. The present study evaluated the effect of a rainfall flood event on coralligenous reefs. The flooded site was compared to three control sites using a Before/After-Control/Impact (BACI) design. Sites were sampled using the STAR (STAndaRdized coralligenous evaluation procedure) approach and three ecological indices (ESCA, COARSE and ISLA) were calculated. At the disturbed site the number of species per sample, beta diversity, sensitivity levels of assemblages and the values of the three indices were lower after the flooding event, while the same variables did not decrease at the control sites. Algal turf and Dictyotales increased at the disturbed sites after the flood event, while Udoteaceae, erect sponges, bryozoans and Corallium rubrum decreased. This study provides evidence for identifying floods as a further cause of degradation for the coralligenous reef assemblages.
降雨主导型洪水的强度和频率增加被认为是气候变化的主要影响之一。本研究评估了一次降雨洪水事件对珊瑚礁的影响。使用前后对照控制影响（BACI）设计，将受洪水影响的地点与三个对照地点进行比较。使用 STAR（标准化珊瑚礁评估程序）方法对地点进行采样，并计算了三个生态指数（ESCA、COARSE 和 ISLA）。在受干扰的地点，洪水事件后每个样本的物种数量、β多样性、群落的敏感水平以及三个指数的值均降低，而对照地点的这些变量并未减少。藻类草皮和 Dictyotales 在洪水事件后在受干扰的地点增加，而 Udoteaceae、直立海绵、苔藓虫和 Corallium rubrum 减少。本研究为将洪水确定为珊瑚礁群落退化的另一个原因提供了证据。
