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1 Biology – Chapter 6. Our Earth is an ISLAND 2 Unlimited Resources?

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Presentation on theme: "1 Biology – Chapter 6. Our Earth is an ISLAND 2 Unlimited Resources?"— Presentation transcript:

1 1 Biology – Chapter 6

2 Our Earth is an ISLAND 2 Unlimited Resources?

3 Resources 3 Environmental resources classified as either: Renewable Nonrenewable Renewable – resources that replenish through natural processes (not always unlimited) Nonrenewable – resources that cannot replenish by natural processes Human activities can affect the quality and quantity of otherwise renewable resources

4 Biodiversity 4 Biological diversity (biodiversity) is essential for biosphere survival – allowing the differences in biological systems to absorb any drastic changes that may happen. Biodiversity = the amount of variation in life in a given species, ecosystem, biome or planet

5 Types of Biodiversity 5 Ecosystem diversity – variety of habitats, communities & ecological processes in the biosphere Species diversity – the number of different species in the biosphere Genetic diversity – the total of all the different forms of all the different organisms in the biosphere Biodiversity is one of the Earths greatest natural resources – providing us with medicines, building materials, artistic inspiration and food.

6 Threats to Biodiversity 6 Human activity can be a threat to biodiversity by: Changing natural habitats Land development, deforestation Hunting species to extinction Food, pests Introducing toxic compounds into food webs Pollution, biological magnification Introducing foreign species into new environments Invasive species

7 Conserving Biodiversity 7 Sustainable Development - A way of using natural resources for human needs without depleting them or causing long term environmental harm Conservation – the management of natural resources to preserve biodiversity for future generations

8 Conservation Strategies 8 Protection of species & ecosystems

9 9 As of the year 2000, more than 35 biodiversity hotspots have been identified

10 10

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