Demographic structure suggests migration of the sea urchin Paracentrotus lividus in a coastal lagoon
Demographic structure suggests migration of the sea urchin Paracentrotus lividus in a coastal lagoon
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DOI：
10.1017/s0025315401003939
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发表时间：
2001-04-01
影响因子：
1.2
通讯作者：
Johnson, M
中科院分区：
文献类型：
--
作者：
Fernandez, C;Caltagirone, A;Johnson, M
1990 年，研究人员对生活在地中海沿岸泻湖的青拟甲螈种群的人口结构进行了研究。对该结构的分析表明，所研究的种群由四个不同的群体组成，分别代表 2、3、4 岁及以上的个体。种群结构随生境变化的变化表明，海胆从卵石区（招募区、海胆密度高和过度放牧相）向 Cymodocea nodosa 海草床组成的区域（生长区、低密度和丰富的食物）迁移。这些迁徙似乎是由前群落生境的食物限制加上年轻人饮食的转变引起的。
The demographic structure of a population of Paracentrotus lividus living in a coastal Mediterranean lagoon was studied in 1990. Analysis of this structure revealed that the population examined was made up of four distinct cohorts which represented individuals 2, 3, 4 and over of age. The variability in demographic structure as a function of biotope revealed that sea urchin migration occurred from the pebble area (recruitment area. high sea urchin density and overgrazing facies) towards areas made up of Cymodocea nodosa sea grass beds (growth areas, low density and abundant prefered food). These migrations seem to have been caused by food limitation in the former biotope coupled with a shift in diet in young individuals.