Presentation is loading. Please wait.
Biology – Chapter 6
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?
Resources 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 List examples of each type of resource Human activities can affect the quality and quantity of otherwise renewable resources
Biodiversity 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
Types of Biodiversity 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 Earth’s greatest natural resources – providing us with medicines, building materials, artistic inspiration and food.
Threats to Biodiversity
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
Conservation – the management of natural resources to preserve biodiversity for future generations Sustainable Development - A way of using natural resources for human needs without depleting them or causing long term environmental harm
Protection of species & ecosystems Biodiversity hotspot = a geographic region with a large amount of biodiversity that is being threatened by humans
As of the year 2000, more than 35 biodiversity “hotspots” have been identified
© 2023 SlidePlayer.com Inc.
All rights reserved.