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首页> 外文期刊>Marine ecology progress series >On the distribution of the invasive long-spined echinoid Diadema setosum and its expansion in the Mediterranean Sea
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On the distribution of the invasive long-spined echinoid Diadema setosum and its expansion in the Mediterranean Sea

机译：侵袭性长纺类棘突性腹泻的分布及其在地中海的扩张

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摘要

Sea urchins from the genus Diadema are some of the most widespread and ecologically important species in tropical marine environments. Two distinct clades of Diadema setosum have been previously recognized based on DNA sequence data: the widespread clade a (distributed throughout the Indo-West Pacific) and clade b (native to the Arabian Peninsula). We use published and novel molecular data to assert the distribution of the 2 D. setosum clades and compile a comprehensive, georeferenced occurrence list for both clades throughout their range. These data are then used to model the global distribution of D. setosum with respect to the 2 molecularly inferred clades and evaluate their invasive potential throughout the Mediterranean. We combine morphological with molecular data to assert the taxonomic identification of the single Mediterranean Diadema recovered to date and provide an updated phylogenetic analysis of this genus. Species distribution modeling predicts suitable habitats for the 2 clades, including some along the Egyptian and Israeli coasts of the Levantine Basin, and in restricted areas in the Aegean and Adriatic Seas. Genetic data show that the Mediterranean Diadema derives from mitochondrial clade b of D. setosum. The spatio-temporal pattern of D. setosum's Mediterranean invasion does not follow a gradual succession of directional population expansion as may be expected from an unmediated larval transport through the Suez Canal, indicating potential anthropogenic involvement. Without intervention, further spread of D. setosum in the Mediterranean seems likely, elevating the risk of a population outbreak that may have far-reaching anthropogenic and environmental consequences.
机译：Diadema属的海胆是热带海洋环境中一些最广泛和最重要的生态物种。之前已经根据DNA序列数据识别出了两个不同的Diedema setosum进化枝：广泛的进化枝a（分布在印度洋-西太平洋）和进化枝b（原生于阿拉伯半岛）。我们使用已发表的新颖分子数据来断定2个D. setosum进化枝的分布，并为这两个进化枝在其整个范围内编制一个综合的，具有地理参考意义的出现列表。然后将这些数据用于模拟D. setosum相对于2种分子推断进化枝的全球分布，并评估它们在整个地中海地区的入侵潜力。我们结合形态学和分子数据来断言迄今已恢复的单个地中海腹泻的分类学鉴定，并提供该属的最新系统发育分析。物种分布模型预测了这两个进化枝的合适栖息地，包括一些沿黎凡特盆地的埃及和以色列海岸以及爱琴海和亚得里亚海的限制区域。遗传数据表明，地中海水蚤源于D. setosum的线粒体进化枝b。 Setosum入侵地中海的时空模式并未遵循定向种群的逐步扩展，这可能是由于未经控制的幼体通过苏伊士运河的运输所预期的，表明潜在的人为参与。如果没有干预，Setosum可能会在地中海进一步传播，从而增加人口暴发的风险，这可能会产生深远的人为和环境后果。

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