کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4539598 | 1626643 | 2015 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Is the East Australian Current causing a marine ecological hot-spot and an important fisheries near Fraser Island, Australia? Is the East Australian Current causing a marine ecological hot-spot and an important fisheries near Fraser Island, Australia?](/preview/png/4539598.png)
• Analysis discovers quasi-climatological chlorophyll-a blooms near Fraser Island.
• Hot spot in bottom stress overlaps with key eastern Australian fisheries.
• Outer-shelf “Southeast Fraser Island Upwelling System” appears to be primarily current driven.
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”.
Journal: Estuarine, Coastal and Shelf Science - Volume 153, 5 February 2015, Pages 121–134