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首页> 外文期刊>Marine ecology >Long-term comparison of structure and dynamics of the red coral metapopulation of the Portofino Promontory (Ligurian Sea): a case-study for a Marine Protected Area in the Mediterranean Sea
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Long-term comparison of structure and dynamics of the red coral metapopulation of the Portofino Promontory (Ligurian Sea): a case-study for a Marine Protected Area in the Mediterranean Sea

机译：菲诺海角（利古里亚海）红珊瑚种群结构和动态的长期比较：地中海海洋保护区的案例研究

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A large amount of data on the precious coral Corallium rubrum has attested to a dramatic shift in the size structure of its over-harvested Mediterranean populations in recent decades. One of the main problems for the conservation of this species is the substantial lack of data concerning the time span necessary for a population subjected to pluri-decennial harvesting pressure to return to its pristine status. Here, we present a multi-annual data set gathered from the Marine Protected Area (MPA) of Portofino, which hosts the most important shallow-water coral populations in the Ligurian Sea and was subjected to strong harvesting pressure from the 1950s to the early 1970s. Quantitative comparison of the population structure data recorded in 1964, 1990 and 2012 indicated a strong size increase of the colonies (from 3 to 8 g mean weight), resulting in an increase in colony biomass from 300 to the current 1500 g.m(-2). As a consequence, over the same span of time, the density of colonies has slightly decreased. The role of mass mortality phenomena, like that occurred in this area during 1999, as possible biological features triggering the switch of red coral populations from a 'grass plain-like' towards a 'forest-like' structure, is discussed. All these data indicate that the instigation of MPAs is a winning strategy in the conservation of this precious species and similar management plans should also be evaluated for the protection of the deep benthic communities thriving on off-shore banks.
机译：最近几十年来，大量有关珍贵珊瑚红珊瑚的数据证明了其过度捕捞的地中海种群的大小结构发生了巨大变化。保护该物种的主要问题之一是，基本上缺乏有关遭受多年生收获压力的人口恢复其原始状态所需的时间跨度的数据。在这里，我们提供了从波托菲诺海洋保护区（MPA）收集的多年数据集，该数据集包含利古里亚海中最重要的浅水珊瑚种群，并且在1950年代至1970年代初期一直承受着巨大的捕捞压力。 1964年，1990年和2012年记录的种群结构数据的定量比较表明，菌落的大小显着增加（从3克平均重量增加到8克），导致菌落生物量从300克增加到目前的1500克（-2） 。结果，在相同的时间范围内，菌落的密度略有下降。讨论了大规模死亡现象（如1999年在该地区发生的现象）的作用，可能的生物学特征触发了红珊瑚种群从“草原样”向“森林样”结构的转变。所有这些数据表明，在保护这种珍贵物种方面，MPA的倡导是一个成功的策略，还应评估类似的管理计划，以保护在离岸银行繁盛的深海底栖生物群落。

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