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Murray River at Torrumbarry

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Murray River at Torrumbarry THE MURRAY RIVER CYANOBACTERIAL BLOOM AUTUMN 2009 Monitoring Results and Implications Chester Merrick and Lee Bowling NSW Office of Water Department of Environment, Climate Change and Water New South Wales Government Murray River Bloom Murray River Sites Hume Dam 6 April 2009 Lake Hume at Dam Wall Murray River at Albury Lake Mulwala 200km downstream Murray River at Tocumwal Gulpa Creek at Mathoura Murray River at Torrumbarry 560 km Murray River at Tooleybuc Murray River at Euston 1100 km Murray River at Merbein Murray River Sites Murray River Cyanobacteria Community 2D Stress: 0.22 sitegroups 5 1 2 3 4 5 Murray River Site-groups Mildura Weir 5 4 2 1 Torrumbarry Weir 3 Lake Lake Mulwala Hume Site-group numbers and location (1) In Lake Hume (2) Downstream of Lake Hume (3) Downstream of Lake Mulwala (4) Downstream of Torrumbarry Weir (5) Downstream of Mildura Weir Probability values for PERMANOVA tests between site-group numbers 1 to 5 1 2 3 4 2 0.002 3 0.007 0.013 4 0.004 0.005 0.001 5 0.005 0.002 0.006 0.003 Average % Similarity within (diagonal) and between site-group numbers 1 to 5 1 2 3 4 5 1 51 2 47 49 3 37 40 44 4 30 34 35 36 5 22 27 29 30 32 Toxicity Tests PCR RESULTS SHOWING PRESENCE (+) OR ABSENCE (-) OF TOXIN PRODUCING GENES Lake Hume Sites 22nd April 2009 Potentially toxic taxa Heywoods Resort Dam Wall Microcystis flos-aquae + - + Anabaena circinalis + - - Cylindrospermopsis raciborskii + - + PCR RESULTS SHOWING PRESENCE (+) OR ABSENCE (-) OF TOXIN PRODUCING GENES Murray River at Cobram Potentially toxic taxa 25-Mar 2-Apr 13-Apr 20-Apr Microcystis flos-aquae - - + + Anabaena circinalis - - + - Cylindrospermopsis raciborskii - + + + Acknowledgements To the staff of: • the former Department of Water and Energy • NSW State Water Corporation • Goulburn Murray Water • Lower Murray Water • Wakool Council • University of NSW for contributing to this presentation..
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