2 Our Earth is an ISLAND Unlimited Resources? If we view the Earth as an island – are there enough resources for our population to survive?Unlimited Resources?
3 Resources Environmental resources classified as either: Renewable NonrenewableRenewable – resources that replenish through natural processes (not always unlimited)Nonrenewable – resources that cannot replenish by natural processesList examples of each type of resourceHuman activities can affect the quality and quantity of otherwise renewable resources
4 BiodiversityBiological 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 BiodiversityEcosystem diversity – variety of habitats, communities & ecological processes in the biosphereSpecies diversity – the number of different species in the biosphereGenetic diversity – the total of all the different forms of all the different organisms in the biosphereBiodiversity is one of the Earth’s greatest natural resources – providing us with medicines, building materials, artistic inspiration and food.
6 Threats to Biodiversity Human activity can be a threat to biodiversity by:Changing natural habitatsLand development, deforestationHunting species to extinctionFood, “pests”Introducing toxic compounds into foodwebsPollution, biological magnificationIntroducing foreign species into newenvironmentsInvasivespecies
7 Conserving Biodiversity Conservation – the management of natural resources to preserve biodiversity for future generationsSustainable Development - A way of using natural resources for human needs without depleting them or causing long term environmental harm
8 Conservation Strategies Protection of species & ecosystemsBiodiversity hotspot = a geographic region with a large amount of biodiversity that is being threatened by humans
9 As of the year 2000, more than 35 biodiversity “hotspots” have been identified