https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2 en-us 2023-02-01 22:14:33 UTC 2023-02-12 22:11:58 UTC hello@padlet.com claireoppermann https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2469271253

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]]> 2023-02-05 23:24:09 UTC https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2469271253 https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2471366618 Algal blooms occur naturally when cyanobacteria reproduce uncontrollably in wetlands. This is commonly caused by a combination of the nutrient mix (phosphorus and nitrogen) and the conditions the environment is in. Agricultural soils typically hold 200 - 500 ppm phosphorus, but blooms can be triggered from as low as 0.02 - 0.05 ppm of phosphorus in the water.

Algal blooms can be incredibly harmful as they contain many types of toxins, these toxins are fatal to domestic animals and stock - can do damage up to as bad as killing them. They can also be incredibly harmful to humans. These blooms remove the oxygen from the water, which negatively impacts aquatic ecosystems, causing sea-life/ sea-animals to die.




]]> 2023-02-07 08:16:48 UTC https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2471366618 https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2473147304 Many different solutions to blue green algae problems have been trialled across Australia, yet their risks and trade offs raises concerns for use in the Curdies estuary. 

Artificially opening the river has been used in Western Australia on the Peel-Harvey Estuary. They experienced temporary success with increasing water quality, the high nutrient loads caused blooms to reoccur. This would not work for the Curdies due its high energy coastline.

Copper Sulphate has been used in France to break down cyanobacteria, however, it only fixed the problem for around 2 months. The large amount of copper being applied can cause copper toxicity.

Flow releases (when water is released from a dam into the river to maintain its health) could wash blooms further down stream, the only downside being trying to find such a water source and releasing it at the appropriate time.]]> 2023-02-08 09:49:06 UTC https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2473147304 https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2474107824 Methods to treat blue-green algae blooms have been trialled in Australia and Internationally. Each method has advantages and benefits although some of the methods have limitations, trade-offs and risks that raise concerns. some of the methods include flocculation, ultrasonics, and aerators.
 Flocculation has been trialled on the Vasse River in Western
Australia. this method was used by putting a hydrotalcite clay into a slurry (a
pipeline that has been designed to move ore). Results of this have shown that
the surface algae was sequestered within about 3 hours, the levels of
phosphorus had decreased and the algae re-growth was still quite low after
about 5 months. Although this method was successful there is little known on
what it is doing on the ecosystem.
 Ultrasonics were trailed in Auckland New Zealand. The results
show that almost 90% of the blue-green algae was reduced. The impacts of this appear
to be low. The only problem is that the studies have been studied in small
amounts of water, it also not been tested on different flows, salinity and
nutrient inputs.
 Aerators can migrate low oxygen effects on lakes. However,
the effects on a estuary are horrible. It will possibly cause the separation of
salt and fresh water which may reduce the water quality.
  


]]> 2023-02-08 21:00:11 UTC https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2474107824 https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2474322089 Blue green algae affects both aquatic and land animals, as it strips the water of oxygen, suffocating nearby fish.

]]> 2023-02-09 01:37:32 UTC https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2474322089 https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2474322897 A fair few methods have been trialled in australia to controll the spread of booms.

Flocculation was trialled on the Vasse River in Westerne Australia.

Ultrasonic were used in Auckland Dam in New Zealand. 


]]> 2023-02-09 01:38:30 UTC https://padlet.com/claireoppermann/9j3mi5svwf5hu8p2/wish/2474322897