Forests and FisheriesScience 11.3

Standard S 6.6b Students know

different natural energy and material resources, including air, soil, rocks, fresh water and forests and know how to classify them as renewable or nonrenewable

Language of the Discipline Renewable resourceClear cuttingSelective cuttingSustainable yieldFishery aquaculture

Renewable resource Always available or is naturally replaced

in a relatively short time

Non-renewable- it cannot be replaced or is not always available

Forest Resources Valuable resources

Frusits Seeds Maple syrup Rubber Nuts Lumber Wood pulp for making paper

All required to be cut down

Coniferous (pine and spruce) Construction and for making paper

Hardwoods Ash, Cherry, Maple

Furniture because of strength and beauty Trees help prevent flooding and control soil

erosion Roots absorb rainwater and hold soil in place

Managing Forests 300 million hectares of forests New trees can be planted to replace

trees that are cut down, forests can be renewable resources

People are trying to maintain forests and to conserve them.

Logging Methods

Clear cutting- cutting down trees in an area at once Quicker, cheaper, safer for loggers, ecosystem

changes and soil is exposed Selective cutting- cutting down only some trees

in a forest and leaving a mix of tree sizes and species behind. Move heavy equipment and logs around

remaining trees, less damaging

Sustainable Forestry Sustainable yield is an amount of a

renewable resource such as trees that an be harvested equally without reducing the future supply

Planting a tree to replace one that was cut down

Trees must be planted enough to keep a constant supply

Harvest different sections at a time

Fisheries An area of ocean with many valuable

ocean organisms Managing fisheries

Fishing limits Hanging fishing methods Developing aquaculture techniques Finding new resources

Fishing Limits Laws

Ban fishing certain species Limit the number or size of a fish Require that fish be within a certain range

of sizes Young fish survive long enough to

reproduce

Fishing Methods/ Aquaculture

Nets to allow small young fish to escape Outlawed methods

Poisoning with cyanide Stunning them with dynamite

Aquaculture Raising fish and other water dwelling organisms for

food Salmon, catfish, shrimp in artificial ponds or bays

New Resources 9,000 different fish species are

harvested for food Fish for new species Scientist and chefs are trying to

introduce people to keep water species such as monkfish and tile fish and tilapia.

Checking for Understanding What is aquaculture What is sustainable yield? What is renewable resource? What is a nonrenewable resource?

Guided Practice/Independent Practice