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Catch my drift?

20/6/2019

2 Comments

 
PictureParallel worlds exist unnoticed alongside our own, but too often the creatures that inhabit them are dismissed as by-products or even impurities
By Mark Robertson
 
DECEMBER 6 was a cracker of a day – hot and sunny, light breeze and a dropping tide, perfect for a boat trip. My son had the afternoon off work so after lunch we launched at Cape Paterson. A lazy swell was foaming against the rocks as we headed around to the surf beach.
 
It soon became apparent that nature was taking a rest. No silvery flashes of baitfish, no contact calls from foraging penguins, no stingrays poking around the sand holes. A lone gannet – usually the most focussed and alert of seabirds – was lazily patrolling for prey. You could almost sense the boredom in its keen eye.

We let the boat drift across the bay, keeping a safe distance out from the small breakers and settled into the natural flow of the waters. The boat became part of the neuston. There are three zones or habitats in a water column: the benthos, or seafloor; the nekton, the main water column; and the neuston, where the water and atmosphere interface.  
 
The tide, wind, swell and current conspired and coalesced to form what is known as “a line of drift”. It appears as a smoother section of water, snaking across the surface, and it tends to gather floating objects along its path. We were part of the flotsam
 
We were surrounded by strands of kelp – golden brown tendrils with bulbous flotation bladders. There had been no bad weather to tear them from the reefs. Do they release themselves to drift at certain times of the season? As I gazed into the water there were dozens of small brown peanut-shaped blobs floating amongst the strands. But they were moving, not just drifting. Tiny squid, using the kelp as cover from predators. Their movements suggested they were feeding on some unseen organisms, possibly copepods or some other planktonic life. An entire ecosystem, dependent on the whims of a moving current. So easy to dismiss as “a lump of seaweed” yet utterly fascinating if you take the time to pause and observe.
 
The desalination industry has another term to describe this assemblage of life forms. They call it “filter cake”. As sea water is sucked into the plant, it is filtered through fine mesh screens to remove “impurities” from the water. This waste product is collected and dumped into landfill. Our local “biggest and bestest” water machine – just around the corner from where my boat was drifting – is now in full production mode. Each day it operates, the plant produces about 40 tonnes of filter-cake “waste”, equivalent to the mass of an adult humpback whale. This is Aquasure’s dirty secret. Over one year of operation, this equates to almost 15,000 tonnes of plankton, marine algaes and myriad other life forms being removed from our marine food chain and dumped in landfill at the Lyndhurst tip near Cranbourne, conveniently owned by Aquasure’s parent company Suez.
 
To visualise this imagine a pile of about 400 dead humpback whales rotting away – that’s the amount of biomass being killed each year so Melbourne can flush high grade drinking water down their toilets.
 
Aquasure glosses over this aspect of operations by claiming “zero environmental impact” or “no harm to beneficial species” or “Look at the trees we’ve planted on our roof”.
 
Theirs is not a “clean and green” operation. It is state-sponsored environmental vandalism on an industrial scale. This year Aquasure will be paid almost $800 million for their services. This is one reason why our community fought so long and hard against the project.
 
The AGL gas plant proposal for Western Port is another looming threat to our marine life. Please support the protests with passion and thoughtfulness.
 
Next time: The battle of the psychedelic cows … 
Picture
Wonthaggi desalination plant. Photo: DELWP
2 Comments
Yvonne J. McRae
26/6/2019 05:30:21 pm

All true and fascinating Mark. We, humans, as a species are SO stupid. Insisting ludicrous projects like the desalination plant are fabulous while the multi-nationals that own it laugh all the way to the bank with Victorian taxpayer's money. Even when not sucking in the sea and tons of lifeforms to produce toilet water for Melbourne the 'owners' collect $1.6 million of taxpayer's money EVERY day!. The Web of Life in the sea depends on the tiniest lifeforms right through to the huge whales. How many people will starve to death in the future as fish stocks around the world decline and virtually disappear. No food 'chain' no fish. But Governments don't care they are only always looking to the next election NOT into the future. I am another always beating the drum about the idiocy of Homo Sapiens destroying the world we live in. Remember there is no Planet B. Yvonne McRae

Reply
Linda Cuttriss
29/6/2019 10:28:45 am

Mark, what a brilliant piece. After lulling me with the beautiful image of tiny squid feeding among drifting golden brown tendrils your message hit me like a tonne of bricks.... make that 40 tonnes (per day), 15,000 tonnes (per year). All that food for fish, penguins, seabirds and whales just rotting away. Yes, this is one of the big reasons to fight against the AGL gas plant proposal in Western Port.

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