Download Humans in the Biosphere Powerpoint

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Bifrenaria wikipedia , lookup

Island restoration wikipedia , lookup

Restoration ecology wikipedia , lookup

Latitudinal gradients in species diversity wikipedia , lookup

Conservation biology wikipedia , lookup

Habitat wikipedia , lookup

Animal genetic resources for food and agriculture wikipedia , lookup

Natural environment wikipedia , lookup

Biodiversity wikipedia , lookup

Habitat conservation wikipedia , lookup

Biodiversity action plan wikipedia , lookup

Reconciliation ecology wikipedia , lookup

Transcript
Humans in the Biosphere
Ch. 6
Human Interaction

There are four main activities by which humans
affect the biosphere:
–
–
–
–

Hunting and Gathering
Agriculture
Industry
Urban Development
What are some of the effects we
see/experience as a result of these activities?
Renewable and Nonrenewable
Resources

Renewable Resources – resources that can be
replenished or regenerate in a relatively short
amount of time
–
–
Ex: trees, water, nutrients, etc.
Although they are renewable, some of the are
limited resources (not always readily available)

Ex: Water can become a limited resource when there is a
drought
Renewable and Nonrenewable
Resources

Human activity can affect the quality and
supply of renewable resources such as
–
–
–
–
–
Land
Forests
Fisheries
Air
Fresh Water
Renewable and Nonrenewable
Resources

Nonrenewable Resources – resources that
cannot be replenished by natural processes
–
–
If they can be replenished, it takes millions and
millions of years to replace it
Ex: fossil fuels (coal, oil, natural gas)
Biodiversity


Biodiversity – the variety of organisms that are
found on Earth
Types of biodiversity
–
–
–

Ecosystem diversity
Species diversity
Genetic diversity
Human activity can threaten and alter
biodiversity
Threats to Biodiversity



Habitat alteration
Demand for wildlife products
Pollution
–

Biological magnification – concentrations of harmful
substances increase in organisms higher in the food chain
Introduced species
–
Invasive species – non-native species that rapidly reproduce
and “choke out” native species

Ex: kudzu
Conserving Biodiversity

Conservation efforts usually focus on
protecting various:
–
Species/Populations

–
bald eagle, koala, etc.
Ecosystems



National Parks
Wilderness Areas
Nature/Wildlife Preserves