MDB
4
What is salinity?
Salt
Biodegradable fertilisers can be more ____ than synthetic fertilisers.
expensive
Name 1 consequence of Blue-Green Algae
1: Poisoning of waterways because of toxins produced by the cyanobacteria
2: Unpleasant odour and taste of water, risk of skin and eye irritation on contact with water
3: Reduced dissolved oxygen levels in the water resulting in death of aquatic organisms, including fish
4: Damage to irrigation and filtering equipment because of clogging.
Sustainability
the ability to be maintained at a certain rate or level.
How many people does the MDB provide water to?
A. 2.8 million
B. 1.8 million
C. 2.4 million
D. 1.4 million
C. 2.4 million
What are the two types of salinity?
1. Dryland
2. Irrigation
How can farmers make money off carp?
Sell them to biodegradable fertiliser companies
Soil erosion is when soil _____ away
breaks or dissolves
Biomes
a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra.
The MDB covers about ?/? of Australia's landmass
1/7
What moves and brings salt to the surface? (process of salinity)
Water Tables
Reducing fertiliser use can provide healthy ecosystems which can then provide...
1. clean water
2. pollination of crops
3. natural pest control
Soil erosion causes sedimentation in waterways which can clog ______ equipment
irrigation
Food Security
Food security is when a person has proper access to food
What do people call the MDB? (nickname)
Australia's food bowl
Name a negative impact of salinity on society
1. Water can't be used to drink water
2. Farmers can't use the water to work
Biodegradable fertiliser breakdowns without leaving harmful residues. This reduces ______ risks.
Pollution
cyanobacteria
Agriculture
The practice of farming
16
How much money does the MDB spend on counteracting dryland salinity per year?
$305 million
Removing large numbers of carp can cause temporary ecological disruptions. Give me an example
Predators who feed on carp cause be disrupted if their food source is being culled
Damage by Blue-Green Algae in the MDB in NSW alone is estimated at $_____ to $______ million per year
$180 - $240
Irrigation
the supply of water to land or crops to help growth, typically by means of channels