Living Resources
SOL 6.2 c,d
SOL 6.9 a,c,d
Living Resources
Chapter 3
Section 1
Issues continued
• Population Growth: As the population
continues to grow so does the demand for
resources. (Improvements in medicine,
agriculture and sanitation)
• Pollution: Any change to the environment
that has a negative effect on living things.
Environmental Issues
• Types of Environmental Issues: Resource Use
Population
Pollution
Resource Use:
Renewable Resources: Are naturally replaced in a
relatively short time. (trees)
Nonrenewable Resources: Natural resources that are not
replaced as they are used. (Oil, natural gas, coal)
Approaches to Environmental Issues
• Can be: Personal - Local - National -Global
Car -
Landfill -
oil drilling
- Earth’s atmosphere
• Environmental Science: Is the study of the
natural processes that occur in the environment
and how humans affect them.
Different Views
• Development Viewpoint: The belief that
humans should be able to freely use and benefit
from all of Earth’s resources.
• Preservation Viewpoint: The belief that all
parts of the environment are equally important,
no matter how useful they are to humans.
• Conservation Viewpoint: Is the belief that
people should use resources from the
environment as long as they do not destroy
those resources.
Review
List the three main types of environmental issues?
Resource management, population growth & pollution
Define environment science:
The study of natural processes that occur in the
environment and how humans can affect those
processes.
Section 2
Forest and Fisheries
• Because new trees can be planted to
replace trees that are cut down, forest can
be renewable resources.
Forest
• Clear-cutting: Is the process of cutting
down all the trees in an area at once.
• Select cutting: Cutting down only some
trees in a forest and leaving a mix of tree
sizes and species behind.
• Sustainable yield: Is a regular amount of
a renewable resource such as trees that
can be harvested without reducing the
future supply.
Fisheries
• Fishery: An area with a large population of valuable ocean
organisms.
• Managing fisheries for a sustainable yields includes setting fishing
limits, changing fishing methods, developing aquaculture
techniques, and finding new resources.
Biodiversity
• Biodiversity: The number of different species in
a given area.
• Factors that affect biodiversity in an ecosystem
include area, climate, and diversity of niches.
• Keystone Species: A species that influences the
survival of many other species in an ecosystem.
Extinction of Species
• Endangered Species: Species in danger
of becoming extinct in the near future.
• Threatened Species: Species that could
become endangered in the near future.
Extinct Animals
Causes of Extinction
• Humans can also threaten biodiversity.
These activities include habitat
destruction, poaching. Pollution, and
introduction of exotic species.
• Habitat Fragmentation: Breaking larger
habitats into smaller, isolated pieces. Or
fragments.