The Study of Biodiversity

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Biodiversity – the amount of living things; animals, microorganisms and plants. It also includes the genetic information these living things contain, and the ecosystems and biomes they form. 3 ways biodiversity can be studied: - GENETIC DIVERSITY: The amount of different genetic characteristics of the species in their genetic make up. - SPEICIES DIVERSITY: the amount of species in a particular area in the world. - ECOSYSTEM DIVERSITY: the amount of ecosystems in a given region or biome. - Places of biodiversity include coral, rainforests, sea grass beds, and mangroves. Australian soils – Old and fragile soils. Water requirements of native plants are adapted to this. – Australia is slowly shifting northwards. The climate will gradually change. – Bushfires. Species can affect scale and range of the bushfires. – Lowest rainfall of the 5 inhabited continents. – Few rivers and lakes. Australian biodiversity - 600,000 – 700,000 species. - Endemic species; 83% of mammals, 45% of birds, 89% of reptiles and 93% frogs. - About a minimum of 60-70 species have become extinct, since European settlement. Hotspot(s) - A region where there is at least 1500 of 800,000 or 0.5% of plant species (70% vegetation). - Hotspots have high diversity, are not found outside the area, a loss of endemic species and are also likely to be lost. Human impacts on biodiversity Unsustainable use of resources: - Agriculture (monoculture and stripping land). - Fisheries (overfishing). -
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