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首页> 外文期刊>Marine biology >Leading role of the sea urchin Arbacia lixula in maintaining the barren state in southwestern Mediterranean
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Leading role of the sea urchin Arbacia lixula in maintaining the barren state in southwestern Mediterranean

机译：海胆紫花苜蓿在维持地中海西南部贫瘠状态方面的主导作用

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摘要

Sympatric sea urchin species are usually considered to belong to the same grazer guild. Nevertheless, their role in community dynamics may vary due to species-specific morphological traits, feeding preferences and foraging behavior. In the Mediterranean Sea, the two species Paracentrotus lividus and Arbacia lixula co-occur in barren areas. Whereas P. lividus is usually considered responsible for creating a barren ground, the roles of the two sea urchin species in its maintenance are currently unclear. The relative and combined effects off. lividus and A. lixula on maintaining the benthic community in the barren state were tested experimentally, using orthogonal exclusion of the two species. Results show that exclusion of A. lixula, regardless of the presence of P. lividus, led to a significant decrease in the surface of bare rock and a significant change of the algal assemblages, thus demonstrating the major role of this species in maintaining the barren state.
机译：同胞海胆物种通常被认为属于同一个放牧公会。然而，它们在群落动态中的作用可能因物种特定的形态特征，进食偏好和觅食行为而异。在地中海，贫瘠地区共生有两个物种Paracentrotus lividus和Arbacia lixula。尽管通常认为青紫菜造成了贫瘠的土地，但目前尚不清楚这两种海胆物种在其维持中的作用。相对和组合影响关闭。使用两个物种的正交排斥试验，对lividus和A. lixula维持底栖动物群落处于贫瘠状态进行了试验。结果表明，无论是否存在青紫假单胞菌，排除螺旋藻均会导致裸岩表面显着减少和藻类组合发生显着变化，从而证明了该物种在维持贫瘠土壤中的主要作用州。

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  • 来源
    《Marine biology》 |2011年第11期|p.2505-2513|共9页
  • 作者

    C. Bonaviri; T. Vega Fernandez; G. Fanelli; F. Badalamenti; P. Gianguzza;

  • 作者单位

    Dipartimento di Scienze della Terra e del Mare, Universita di Palermo, Via Archirafi 18, 90123 Palermo, Italy;

    Laboratorio di Ecologia Marina, CNR-IAMC, Via G. da Verrazzano 17, 91014 Castellammare del Golfo, TP, Italy;

    Talassografico "A. Cerruti", CNR-IAMC, Via Roma 3, 74123 Taranto, Italy;

    Laboratorio di Ecologia Marina, CNR-IAMC, Via G. da Verrazzano 17, 91014 Castellammare del Golfo, TP, Italy;

    Dipartimento di Scienze della Terra e del Mare, Universita di Palermo, Via Archirafi 18, 90123 Palermo, Italy;

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