Stocktake of waterbirds in eastern Australia has shown the lowest breeding level on record

ABC News 27 December 2015:

A stocktake of waterbirds in eastern Australia has shown the lowest breeding level on record.

The annual aerial survey, conducted by the Centre for Ecosystem Science at the University of NSW, confirmed a dramatic long-term decline in the number of waterbirds.

Director Richard Kingsford said that over 33 years of counting, average numbers had fallen more than 60 per cent.

The trend continued in 2015 with a further drop compared to the previous three-to-five-year period.

"This is the second lowest number of waterbirds we've seen in that 33-year period and it's symptomatic of the real impacts of this drought that's occurring across the eastern half of the continent," Professor Kingsford said.

The survey covered all the major rivers, lakes and wetlands from Queensland down through New South Wales, Victoria and South Australia, including the Murray-Darling Basin and the Riverina.

The team found the Macquarie Marshes and Lowbidgee wetlands were only partially filled, most rivers in the Murray-Darling Basin were also relatively dry, with little wetland habitat on their floodplains, and all the large lakes in the Menindee system were dry.

The Lake Eyre and Cooper Creek wetlands were mostly dry except for a small area to their east, while important wetlands in the Lake Eyre Basin including Lakes Galilee, Yamma Yamma, Torquinnie and Mumbleberry were dry.

Waterbirds were concentrated in relatively few important sites, with only four wetland systems holding more than 5,000 birds: Lake Killapaninna, Lake Allallina, Paroo overflow Lakes and Coolmunda Dam.

Most alarmingly, the total breeding index of all 50 species combined was the lowest on record and well below the long-term average……

Professor Kingsford said climate change also needed to be taken into account.

"For these wetlands, they rely on that water staying around so animals and plants can go through their life cycles, but if you've got less of the water actually coming in at the top end and when it gets to the wetland there's a high evaporation rate then it's really challenging in the long term as well," he said.

"So a whole series of targets have been set and the big challenge is: did we get enough water for the environment over the next 15 to 20 years?"

He warned that if the regulators did not find the right balance, the wider community would pay a hefty price.

"We know in the millennium drought, for example, when there wasn't enough water for the Lower Lakes and the Coorong, governments had to put their hands in their pockets to spend $2 billion to actually rescue that system," Professor Kingsford said.

"We currently have a dredge parked in the mouth of the River Murray which is trying to keep it open — a service that the environment used to do for nothing, and that's costing taxpayers up to $100,000 a week."

He said the birds were a barometer, indicating declining health of the whole ecosystem.

University of NSW, Centre for Ecosystem Science, Aerial Survey of Wetland Birds in Eastern Australia - October 2014 Annual Summary Report

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