Meiofauna dispersal near natural petroleum seeps in the Santa Barbara channel: A recolonization experiment

Oil and Chemical Pollution Pub Date : 1988-01-01 DOI:10.1016/S0269-8579(88)80019-4

Margaret A. Palmer , Paul A. Montagna, Robert B. Spies, Dane Hardin

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引用次数: 18

Abstract

Studies on the response of fauna to natural disturbances indicate that disturbance events may be important in structuring marine benthic communities. Benthic populations in the Santa Barbara Channel off Isla Vista, California are regularly subjected to natural disturbances by chronic petroleum seepage in the area. It has been suggested that these populations show enhanced dispersal abilities when compared to populations that are not disturbance-adapted. Our study compared the rate of meiofaunal colonization into azoic sediment trays buried at an oil seep site with a nearby comparison site free of fresh oil. At the comparison site, for all taxa examined, meiofaunal abundances in the colonization trays did not reach ambient (surrounding sediments) levels at any time during the 23-h experiment. At the seep site, meiofaunal abundances in the trays reached ambient levels in 6 to 23 h, depending on taxa. Thus, the rate ofmeiofaunal colonization was faster at the seep site than at the comparison site. Enhanced susceptibility to passive transport or active water column entry by some species was most likely responsible for the enhanced colonization rate at the seep site.

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圣巴巴拉海峡天然石油渗漏附近的巨型动物群扩散:重新定殖实验

动物对自然干扰的响应研究表明，干扰事件可能在海洋底栖生物群落的结构中起重要作用。加州维斯塔岛附近圣巴巴拉海峡的底栖生物种群经常受到该地区长期石油渗漏的自然干扰。有人认为，与不适应干扰的种群相比，这些种群表现出更强的扩散能力。我们的研究比较了埋在石油渗漏点和附近没有新鲜石油的比较点的无氮沉积物盘中的小动物定植率。在比较地点，对于所有被检查的分类群，在23小时的实验中，定植盘中的小动物丰度在任何时候都没有达到环境(周围沉积物)的水平。在渗漏点，不同分类群在6 ~ 23 h内达到环境水平。因此，微生物在渗点的定植速度要比在对照点快。一些物种对被动运输或主动水柱进入的敏感性增强，可能是导致渗点定殖率提高的主要原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Oil and Chemical Pollution

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