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首页> 外文期刊>Marine biology >Population structure of an exploited benthic cnidarian: the case study of red coral (Corallium rubrum L.)
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Population structure of an exploited benthic cnidarian: the case study of red coral (Corallium rubrum L.)

机译：被开发底栖刺胞的种群结构：以红珊瑚（Corallium rubrum L.）为例

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摘要

Octocorals are an important part of many ecosystems as they add three-dimensional complexity to the benthos and thereby increase biodiversity. The Mediterranean red coral (Corallium rubrum, L. 1758) is a longevous octocoral that is harvested commercially, yet natural and anthropogenic influences on its population size structure are little understood. This study found that some harvested red coral populations had a significantly different size structure when compared to populations at the nearby Marine Protected Area (MPA) of Medas Islands at the Spanish Costa Brava (NW Mediterranean). Eighty-nine percent of the red corals in the harvested Costa Brava area are less than 10 years old and 96% of all colonies have not yet grown more than second-order branches. The size/age distribution of the harvested population is notably skewed towards younger and smaller colonies. Thus, although red coral is still abundant, its population structure is strongly distorted by harvesting. The results confirm that MPAs are useful to distinguish between anthropogenic and natural influences on population structure. However, 14 years of protection appears to be an insufficient recovery time for a longevous octocoral population such as red coral.
机译：八爪鱼是许多生态系统的重要组成部分，因为它们增加了底栖动物的三维复杂性，从而增加了生物多样性。地中海红珊瑚（Corallium rubrum，L. 1758）是一种长寿的八眼鱼，商业上收获，但人们对其种群大小结构的自然和人为影响知之甚少。这项研究发现，与附近西班牙布拉瓦海岸（地中海西北部）的梅达斯群岛海洋保护区（MPA）附近的种群相比，一些捕捞的红色珊瑚种群具有明显不同的大小结构。布拉瓦海岸已收获地区中有89％的红珊瑚年龄不到10年，而所有菌落中96％的红珊瑚的生长还不到二阶分支。收获种群的大小/年龄分布明显偏向年轻和较小的殖民地。因此，尽管红珊瑚仍然丰富，但其种群结构却因采伐而严重变形。结果证实，MPA有助于区分人为和自然对人口结构的影响。但是，对于象红珊瑚这样的八角珊瑚长寿种群来说，保护14年似乎不足以恢复时间。

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