2Our 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?
3Resources 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
4BiodiversityBiological 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
5Types 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.
6Threats 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
7Conserving 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
8Conservation Strategies Protection of species & ecosystemsBiodiversity hotspot = a geographic region with a large amount of biodiversity that is being threatened by humans
9As of the year 2000, more than 35 biodiversity “hotspots” have been identified