Is the East Australian Current causing a marine ecological hot-spot and an important fisheries near Fraser Island, Australia?

Brieva, Daniel and Ribbe, Joachim and Lemckert, Charles (2015) Is the East Australian Current causing a marine ecological hot-spot and an important fisheries near Fraser Island, Australia? Estuarine, Coastal and Shelf Science, 153. pp. 121-134. ISSN 0272-7714

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Abstract

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'.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 29 Jan 2015 04:46
Last Modified: 01 Dec 2016 02:51
Uncontrolled Keywords: chlorophyll-a; East Australian Current; southeast Fraser Island upwelling system; Western Boundary Current; bottom layer stress
Fields of Research : 06 Biological Sciences > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
04 Earth Sciences > 0405 Oceanography > 040503 Physical Oceanography
04 Earth Sciences > 0405 Oceanography > 040501 Biological Oceanography
Socio-Economic Objective: D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments
Identification Number or DOI: 10.1016/j.ecss.2014.12.012
URI: http://eprints.usq.edu.au/id/eprint/26579

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