Showing posts with label mega. Show all posts
Showing posts with label mega. Show all posts
Millions of years ago kangaroos were much different than they are today. The sthenurine kangaroo once dominated Australia. It became extinct only 30,000 years ago when the maga fauna era ended. They were two meters tall, much too large to hop. It is surmised that they walked like humans.

Their face was flat and they looked like a rabbit with a large tail. They were a side branch of the kangaroo family. The main line continued to become modern kangaroos. Procoptodon golliah grew to three meters tall and weighed about 240kg.

Scientists had assumed that they hopped like modern kangaroos. The most obvious conclusion is usually the best, but in this case it was wrong. Their bone structure points to them walking. Having a large tail was a bonus: it improved balance.

The mega fauna period has been painted as a time of happy giants. For humans it would have been frightening. These oversized creatures would have been difficult to hunt. Indeed, humans probably had a policy of keeping their distance. Just because most did not eat meat does not mean they weren't dangerous.
 Funny Animal Pictures by Ty Buchanan 
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Agriculture Disrupts the Ecosystem

Human impact on native flora and fauna is real. There seems to be no way the detrimental affects can be ameliorated. Aboriginals have been in Australia for 40,000 years. apart from the unanswered question about extinction of mega fauna Aboriginals did not alter the external environment at all.

Sedentary agriculture is the major contributing factor to habitat damage. Planting mono-crops seriously changes land features. In Western Australia, for example, water points are located at 50 sq km on average. In its pre-European natural state water holes could be found 2.5 sq km apart. This is serious change with species of native birds declining.

Unless we set areas aside as pristine, protected sectors only introduced pest species will remain. Even without the pest birds, the proportion of native birds is altered. Some die out while others increase in number. The ecosystem is no longer in balance.
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Conservation
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