1.4.9 Human Impact on an Ecosystem 2

Name: ______

1.4.9 Human Impact on an Ecosystem 2 Conservation Worksheet

Conservation Have you seen on of these recently?

It is a Dodo and has been extinct since 1681.

How did it happen?

What happened to the dodo? {Not examinable} • In 1598 Portuguese and Dutch sailors were the first people to live on the island of Mauritius. • With them they brought pigs, dogs, rats and even monkeys. • They killed dodos for food and by 1681 (83 years later) they were extinct.

Conservation

• If you are connected to the internet click on the link below to view a web page on the Relationship of the Dodo Bird and the Calvaria Tree {Not examinable} http://geology.wcedu.pima.edu/~enicksin/new.html

What is Conservation? Conservation is the ______and ______of ______and the ______.

Benefits of Conservation

• Existing environments ______• Endangered species ______• The balance of nature ______• ______are reduced Page 1 of 11 Name: ______

of 11 Name: ______

One Conservation practice from one of the following areas Area Conservation Practice Mixed farming, Crop rotation Agriculture Biological controls, Gene banks

Fisheries Fishing Net size, Quotas, Re-stocking Forestry Re-planting, Broadleaf/conifer mix

There is a ______of the environment to ______and the ______of its natural resources.

Agriculture One Conservation practice from one of the following areas is required: Mixed farming Biological controls Crop rotation Gene banks

Mixed farming What is mixed farming? Farming system where both ______(crops) and ______(livestock) farming is carried out.

Conservation and Mixed Farming • Animals ______and help to maintain ______and ______of artificial fertilisers used. • Increases ______and soil ______and improves ______. • If rotations of various crops and forage legumes are used, they ______• Reduce ______.

• Recycling wastes ______

Crop rotation What is crop rotation? ______in a given field from one growing

of 11 Name: ______season to the next.

of 11 Name: ______

Conservation and Crop Rotation

• Different crops ______from the soil; some crops ______particular nutrients that others take away. • Crop rotation can also ______and avoid the build up of ______and ______that often occur when one species is continuously grown.

Biological controls What are Biological controls? Biological control is a method of ______(including ______) and diseases in agriculture that ______, ______or other ______, rather than introduced chemicals.

Conservation and Biological Controls • Ladybird larva eating woolly apple aphids Advantages: • ______• No ______left on plants • ______of chemicals into soil or watercourses

Conservation and Biological Controls

• Diagram illustrating the natural enemies of cabbage pests

Conservation in action in Agriculture Conventional agriculture uses ______and ______This has contributed to ______through ______, ______and ______. These also have negative effects on the soil, water and air qualities. Global climate, wildlife and biodiversity are also affected. Page 5 of 11 Name: ______

Is soil degradation serious?

• Soil degradation due to erosion and compaction processes is probably the ______caused by conventional agriculture. • About ______of land are lost per year for agricultural uses, due to soil degradation processes Note: 10,000,000 ha = 24,700,000 acres = 95,500 square miles. Ireland = 39,690 square miles

A Dust Storm

Soil being blown away

Can you suggest what should be done?

• Stop ______

• Reduce the ______

• Increase the amount of ‘______’ land

Gene Banks What are gene banks? Gene banks are ______, be it plant or animal. In plants, this could be ______from the plant, or the seeds themselves. In animals, this is the ______.

Conservation and Gene Banks This is one way scientists have of ______. In plants, it is possible to ______, however, in animals, a living female is required for ______.

of 11 Name: ______

Conservation and Gene Banks Artificial insemination of farm animals is very common in today's agriculture industry. It provides an ______for a livestock grower to breed their herds with males ______, e.g. good beef quality, high milk yield, good wool quality, etc.

Fisheries One Conservation practice from one of the following areas is required: Fishing Net size Quotas Re-stocking

Fishing Net size What is net mesh size? This refers to how ______or spaces enclosed by the threads of a net are.

Conservation and Fishing Net Size

• The use of small-mesh nets can result in ______• Using larger meshed nets to ______

of 11 Name: ______

Different types of nets

Square Mesh Diamond Mesh

Square mesh – does not alter its shape under Diamond mesh netting (left) – closes under tension – tension (right) and ______

Fishing Quotas What is a fishing quota? ______This national quota allocation is ______into quotas for specific ______, ______, ______or ______, e.g. producers' organisations.

Fishing Quotas Why have quotas? Over fishing has ______at sea Fish quotas (maximum amount allowed to be caught) have been assigned to different countries to ______.

Conservation and Fishing Quotas

• Helps to prevent the ______• Gradually ______and helps to re-establish populations Page 8 of 11 Name: ______

• Attempts to maintain fishing at ______

Re-stocking What is the purpose of re-stocking? To achieve a ______of that species ______of species into areas where they have not naturally occurred is not encouraged Can you suggest why not? ______

Conservation and Re-stocking

• Re-stocking attempts to ______• Increases stocks for ______

Forestry

Ground layer in Multi-layered open Deciduous Forest Forest

Deciduous Forest Coniferous Forest

Forestry One Conservation practice from one of the following areas is required: Re-planting Broadleaf/conifer mix

Forestry Re-planting

• Ensures ______of those forests that are periodically harvested for timber. • Allows foresters to ______for the forest.

of 11 Name: ______

• Helps the forest ______. Replanting is now a common practice after harvests and wildfire. • Forests that aren't replanted after a natural disaster, can take ______.

of 11 Name: ______

Broadleaf/Conifer mix

• Conifers rapidly ______to replace imports • Broadleaf trees also provides timber for industry ______• Broadleaf planting forms ______and provides ______, ______, adds to the landscape and ______

Conservation in action in Forestry

• The selection and management of the ______of the woodland • ______of broadleaved species in plantations

• Leave greater areas of ______. This will encourage the growth of an ______by increased light penetration

Conservation in action in Forestry

• Encourage the planting of woodland plots with the greatest woodland edge

• Enhance the ______of wooded areas by leaving some ______; and increasing the number of ______• Promote ______rather than ______as the dominant harvesting technique

Need to know

• Define the term: Conservation.

• Outline any one practice of conservation from agriculture, forestry or fisheries.