Over 10years of variation in Mediterranean reef benthic communities
Over 10years of variation in Mediterranean reef benthic communities
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DOI：
10.1111/maec.12439
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发表时间：
2017-06-01
影响因子：
1.1
通讯作者：
Cattaneo-Vietti, Riccardo
中科院分区：
文献类型：
--
作者：
Betti, Federico;Bavestrello, Giorgio;Cattaneo-Vietti, Riccardo
在过去几十年中，地中海沿岸的浅水底栖生物群落的结构和分类组成发生了重大变化。尽管进行了许多研究，在各个层面上描述这些变化的特点，但一直很难将自然因素的影响与人为因素的影响分开。这项工作的主要目的是评价高度保护区内被认为主要和可能受到自然压力影响的海底群落最具代表性物种的多样性和丰度在10年期间可能发生的变化。2002-2003年，在一个称为Ca' dell'Oro的小海湾内的三个地点拍摄了几组宏观照片，该海湾是波托菲诺海洋保护区的禁止进入区，目的是分析短时间内不同深度的底栖生物群落结构。10年后的2013年又重复了同样的取样。在10年的时间跨度内，大型藻类的覆盖率和组成发生了重大变化，而物种的总体丰富度和覆盖率几乎保持不变。这一过程导致三维藻类组成部分的栖息地复杂性显着降低。同样，所有底栖动物组分的存在和丰度也发生了显著变化。底栖生物群落似乎受到了利古里亚海近年来发生的气候事件可能造成的有害影响。
During the last several decades, the Mediterranean littoral shallow water benthic communities have suffered significant changes in their structure and taxa composition. Despite numerous studies conducted to characterize these changes at various levels, it has always been very difficult to disentangle the effects of natural factors from anthropic ones. The main purpose of this work was to evaluate possible changes, over a 10-year scale, in diversity and abundance of the most representative species of the benthic communities considered to be primarily and potentially affected by natural stressors in a highly protected area. Sets of macro-photographs were taken in 2002-2003 of three sites inside a small bay called Ca' dell'Oro, which is the no entryno take zone of the Marine Protected Area of Portofino, in order to analyse the structure of the benthic communities at different depths over a short time scale. The same sampling was repeated 10years later in 2013. In the 10-year span, a significant change in the macroalgal coverage and composition was observed, while the overall richness and coverage of species remained almost unchanged. This process resulted in a significant reduction of the habitat complexity of the three-dimensional algal components. Likewise, a remarkable change in terms of presence and abundance occurred among all zoobenthic components. The benthic communities seem to have suffered from detrimental effects probably caused by climatic events that have been occurring in recent years in the Ligurian Sea.