Overview - CLLAMM technical briefing

HEADLINE TO BE PLACED IN THIS SPACE CLLAMMecology Overview Sébastien Lamontagne CSIRO Land and Water & Water for a Healthy Country Flagship CLLAMMecology Research Cluster partners:

The Coorong, Lower Lakes and Murray Mouth • Irrigated agriculture • Tourism and fisheries • Ramsar-listed wetland (1985) • Living Murray Icon site • Traditional country of the Ngarrindgeri

Ecological impacts • Low River Murray inflows due to diversion and a drought • Hypersalinisation of the Coorong • Siltation of Murray Mouth channel • Declining water level in the Lower Lakes

The need • CLLAMM workshop in 2004 with managers and scientists • Agreement that a tool was required to assess ecological impacts in the region • Several ecological knowledge gaps • Scope for management intervention mainly in the Coorong at that time

CLLAMMecology (2006–09) Improve ecological knowledge in the CLLAMM region • Emphasis on the Coorong • Some research on the Lower Lakes • Develop an ecological framework to guide management intervention in the Coorong

A “system” approach

CLLAMMecology components

Hydrodynamic model • Evaluates across the Coorong: • Water exchange • Water level • Salinity • Driven by: • Flow through barrages • USED flows • Wind and evaporation • Effective depth of Mouth channel • Suitable for longer-term (decades and centuries) scenario analyses

Design of Field Program • 12 focal field sites • Original aim: Study biological responses to barrage outflows • No freshwater inflows during the study (mid 2006-08) • An opportunity to study the system under extreme conditions

Outcomes • New ecological knowledge about the Coorong region • Robust ecological framework to guide management intervention in the Coorong • Linking management levers to ecological outcomes • Few similar examples in Australia or overseas

Recommendations • Use the framework to guide management intervention in the Coorong • Develop a similar framework for the Lower Lakes • Use future environmental flows to the Coorong as an opportunity to further learn about the system

How to use the Framework? Distribution of: • Food sources • Key fish and birds Climate and Hydrodynamic Distribution of Management Model potential habitats Scenarios Ecosystem state modelling

Acknowledgements • Funding agencies • Flagship Collaboration Fund • LWA, FRDC, MDBA (Living Murray) • Management Agencies • DWLBC, MDBA, DEH, SA MDB NRM Board • Geoscience Australia • Mike Geddes, Colin Creighton • Post-doctoral fellows • Support team for public events • Julie Francis, Helen Beringen, Scott Mills, Heather Riddell, John Goslino

Overview - CLLAMM technical briefing

by University of Adelaide on Jul 20, 2009

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