Would you like him on your salad? Why not?. Biological Control Some farmers prefer to release a predator to control the number of pests. However, it is.

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Would you like him on your salad? Why not?

Biological Control Some farmers prefer to release a predator to control the number of pests. However, it is important to think about the effect of the predator on the rest of the food web. Above: Ladybird Larvae can eat thousands of aphids (greenfly). Left: Cane toads eat sugar cane beetles

The story of Australia and its’ Rabbits Common name Rabbit, European wild rabbit. Scientific name Oryctolagus cuniculus. Status “Rabbits” are declared an established pest animal under the Catchment and Land Protection Act A person may keep any kind of rabbit, other than the wild rabbit in Victoria. A maximum of 30 pet rabbits may be kept at one time. A permit is required for commercial farming of domestic rabbits. A brief history of the European wild rabbit “….. the rabbit menace in Australia today is so great that it would be almost impossible to exaggerate its possibilities.” (1935). 1859: 24 wild rabbits released at Barwon Park by Thomas Austin rabbits spread across Australia at about 130 km per year some farms were abandoned because of rabbits as early as : 10 billion rabbits in Australia 1944: 104,000,000 million rabbit skins/carcases exported from Australia : Myxomatosis killed 99.8% of rabbits Myxo virus attenuates/rabbit show resistance to the virus, rabbits breed up again, spreading into new areas and re-colonising old warren sites 1990: Australia’s rabbit population about 600 million rabbits cost agriculture and the environment millions of dollars each year : Rabbit Calicivirus Disease (RCD) rabbits reduced by >50% in arid areas 1996 –2003: Rabbit Buster, (a coordinated Landcare/NRE group integrated rabbit control program) rabbits reduced by 30% in Victoria (1999) RCD and integrated rabbit control used together in large-scale group campaigns has seen some areas aiming to become rabbit free.

An ecosystem consists of communities of plants, animals and microorganisms that interact with each other and their physical environment. Biodiversity is a measure of the: Number of species Number of individuals of each species Genetic variation of each species present

The habitat of an organism is the place that it lives. An ecological niche is an organisms interactions with it’s physical habitat and other organisms in that habitat. If two species occupy the same niche they will compete until one species is displaced. Species are usually forced to occupy a niche smaller than their fundamental niche.

In the past 600 million years there have been five major extinction events. The most recent is due to mankind.

Reasons for conservation Economic Ecological Ethical Aesthetic

Reasons for conservation Economic Ecosystems provide us with raw materials e. timber. Services eg. decay and soil formation, climate regulation. Ecological Ethical Aesthetic

Reasons for conservation Economic Ecosystems provide us with raw materials e. timber. Services eg. decay and soil formation, climate regulation. EcologicalKeystone species eg. wolves, deer and forestry. Ethical Aesthetic

Reasons for conservation Economic Ecosystems provide us with raw materials e. timber. Services eg. decay and soil formation, climate regulation. EcologicalKeystone species eg. wolves, deer and forestry. EthicalWe have a responsibility to maintain biodiversity for future generations. Aesthetic

Reasons for conservation Economic Ecosystems provide us with raw materials e. timber. Services eg. decay and soil formation, climate regulation. EcologicalKeystone species eg. wolves, deer and forestry. EthicalWe have a responsibility to maintain biodiversity for future generations. AestheticThey make us happy! Don’t forget even a lion depends on every other organism in it’s ecosystem.