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桑沟湾大型底栖动物的次级生产力

DOI: 10.3724/SP.J.1145.2011.00495, PP. 495-498

Keywords: 大型底栖动物,丰度,生物量,次级生产力,p/b值,桑沟湾

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Abstract:

根据2009年夏季和冬季在桑沟湾9个大面站进行的大型底栖动物定量采集样品资料,利用brey(1990)的经验公式对调查海区进行了大型底栖动物丰度、生物量、次级生产力和p/b值的研究计算.结果表明,该海域大型底栖动物年平均丰度为1226.7indm-2,年平均生物量为3.62g(afdw)m-2,年平均生产力为4.76g(afdw)m-2a-1,p/b值平均为1.45a-1.调查期间由湾口到湾底,次级生产力呈明显的梯度升高.相关分析表明,水深和水温是影响次级生产力的重要环境因子.通过比较,发现桑沟湾大型底栖动物次级生产力与南黄海相近,高于东海、长江口和深沪湾,低于渤海、胶州湾、大亚湾和海坛海峡;p/b值低于长江口、海坛海峡和深沪湾,高于其它海区,说明桑沟湾大型底栖动物群落中,个体小、生活史短、代谢快的种类所占比例低于海坛海峡和深沪湾,高于其它海区.图2表3参25

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