‘Rocks and boulders’ and ‘turtles’ in South Australia’s rain gardens
- by admin
South Australia has a reputation for being the epicentre of rainforest life in Australia.
But, despite its size, the state’s rainforests are still not quite the epicenter that they once were.
“There are many people who think that the rainforest has become more fragmented and degraded than it was a century ago,” said Professor Brian Behan, a University of New South Wales research associate and one of the authors of the study.
That is because of a range of reasons, including climate change, habitat loss and development.
Researchers say they have identified what they call “drought deserts” in the rainforelands that have reduced the amount of rain forest that can be grown in the state.
The deserts are often located in the central and northern parts of the state and they are usually formed by landslides, landslides from floods, fires and landslides of sediment and rocks.
Professor Behan and his colleagues say the number of such areas in South Australian rainforesters has fallen from more than 1,000 in the 1970s to fewer than 50 in the last two decades.
They also say that they have found more than half of these areas have disappeared since 2000.
And, while there are other parts of Australia that have experienced significant increases in rainfall in recent decades, South Australia is not one of them.
According to Professor Behan’s calculations, South Australian rainfall deserts in the past two decades have been concentrated in the Central and Northern Rivers region of the south-west of the country.
What’s more, rainfall deserts are not restricted to South Australia.
In the Northern Rivers, Professor Beham’s team found that drought deserts were also found in the South Australian Capital Region.
While the study found that some of these deserts are located in rural areas of South Australia, Professor Mark Dallat, an Australian Research Council Fellow and a member of South Australian Research and Engineering Network, told the ABC that there is a lot more to South Australian drought deserts than meets the eye.
Mr Dallatt said that many of the rain forest habitats that were being eroded are actually already in development areas, and that the state was being pushed into the middle of the road.
It has been a big challenge for rainforest management in South Africa, he said.
Rainforest has been threatened by development, pollution, mining and the loss of wetlands over the past 50 years Professor Dallot said rainforens had been in decline across the continent for over 50 years.
He said there were many factors that were at play.
For instance, South Africa had not had enough rainfall in the 1990s, but the state had not seen the same level of development and pollution as the rest of the continent.
There was also a big difference in how rainforest was being managed in the Southern and Central Rivers.
In the Central Rivers, rainforest had been largely fragmented by mining and logging in the 1960s and 1970s, Professor Dandt said.
He said in the early 1990s South Africa was a huge rainforest reserve, but it had been reduced by around a third by mining, pollution and the erosion of wetlands.
Over the last 40 years the rain forests have been fragmented by roads and development, and the riverine ecosystems have also been damaged, Professor Doiron said.
Professor Beham said that South Australia was being driven into the desert by climate change and pollution, and was one of several Australian states that were facing similar challenges.
South Australia is also experiencing an increase in climate change caused by greenhouse gas emissions, Professor David Wilson, a senior scientist with the South Australia-based Centre for the Environment, said.
“There is a very strong connection between the increased warming and drought in South and the decline in rainforen vegetation in South,” Professor Wilson said.
Professor Beahan and his co-authors also found that the South Australians are experiencing the impacts of climate change more rapidly than other states.
When the climate warms, there is more water being stored in the soil, which increases evaporation, which leads to higher temperatures.
This in turn increases evapoordination, which means that more moisture is trapped in the air, and so, in the future, the rain-bearing plants will dry out, Professor Bozena said.
“We are already seeing more drought-prone rainforets in South than other places,” Professor Bozana said, adding that more drought was expected in the Northern Watersuit areas.
Australia’s most-affected rainforest areas South Australia: – The South Australia National Park, in South Perth, has been experiencing a lot of flooding since the 1970’s, with water tables rising as the region has warmed.
– A number of areas along the southern coast of South West Victoria, including the town of Wirra, are experiencing extreme flooding.
South Australia has a reputation for being the epicentre of rainforest life in Australia.But, despite its size, the state’s rainforests…