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首页> 外文期刊>Estuarine Coastal and Shelf Science >Is the East Australian Current causing a marine ecological hot-spot and an important fisheries near Fraser Island, Australia?
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Is the East Australian Current causing a marine ecological hot-spot and an important fisheries near Fraser Island, Australia?

机译：东澳大利亚洋流是否引起了澳大利亚弗雷泽岛附近的海洋生态热点和重要渔业？

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摘要

The distributions of chlorophyll-a (Chl-a) blooms near the Fraser Island continental shelf along the east coast of Australia were analysed for the period 2002-2012. The blooms were found to exhibit two distinct quasi-climatological patterns. The first pattern was a broad near-coast mid-shelf distribution that prevailed from about March to July each year. The second pattern was established due to re-occurring outer-shelf Chl-a blooms southeast of Fraser Island from about August to February. The outer-shelf Chl-a bloom concentration maxima appeared to be higher than those associated with the near coast pattern. Both distributions were found to be characterised by significant year-to-year variability in the number of total blooms, the length of blooms and the Chl-a bloom concentration maxima. The physical cause of the outer-shelf Chl-a concentration maxima was of particular interest, since this location overlaps with a region previously identified as a key eastern Australian marine ecological site and important fisheries. In this analysis, we found that the area also overlaps with a hot-spot in EAC-generated bottom layer stress, which appears to be the main driver of the "Southeast Fraser Island Upwelling System".
机译：分析了2002-2012年澳大利亚沿东海岸的弗雷泽岛大陆架附近的叶绿素a（Chl-a）开花。发现大花表现出两种不同的准气候模式。第一种模式是每年3月至7月左右的广泛的近海岸中架分布。第二种模式是由于在8月至2月左右在弗雷泽岛东南部重现外部Chl-a花朵而建立的。外架Chl-a盛开的最大值似乎高于与近海岸模式有关的最大值。发现这两种分布的特征是总开花量，开花长度和Chl-a开花浓度最大值的年际变化显着。货架外Chl-a浓度最大值的物理原因特别令人关注，因为该位置与先前被确定为澳大利亚东部重要海洋生态站点和重要渔业的区域重叠。在此分析中，我们发现该区域还与EAC生成的底层应力中的热点重叠，这似乎是“东南弗雷泽岛上升流系统”的主要驱动力。

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