What you’ll learn9 learning objectivesChoose one objective for a focused lesson, or study the complete topic.20.4.1Sustainable resource as one which is• Describe a sustainable resource as one which is produced as rapidly as it is removed from the environment so that it does not run outSyllabus objective20.4.2Some resources can be conserved• State that some resources can be conserved and managed sustainably, limited to forests and fish stocksSyllabus objective20.4.3Organisms become endangered or extinct• Explain why organisms become endangered or extinct, including: climate change, habitat destruction, hunting, overharvesting, pollution and introduced speciesSyllabus objective20.4.4Endangered species can be conserved• Describe how endangered species can be conserved, limited to: (a) monitoring and protecting species and habitats (b) education (c) captive breeding programmes (d) seed banksSyllabus objective20.4.5Forests can be conserved using• Explain how forests can be conserved using: education, protected areas, quotas and replantingSyllabus objective20.4.6Fish stocks can be conserved using• Explain how fish stocks can be conserved using: education, closed seasons, protected areas, controlled net types and mesh size, quotas and monitoringSyllabus objective20.4.7Reasons for conservation programmes• Describe the reasons for conservation programmes, limited to: (a) maintaining or increasing biodiversity (b) reducing extinction (c) protecting vulnerable ecosystems (d) maintaining ecosystem functions, limited to nutrient cycling and resource provision, including food, drugs, fuel and genesSyllabus objective20.4.8Use of artificial insemination (AI)• Describe the use of artificial insemination (AI) and in vitro fertilisation (IVF) in captive breeding programmesSyllabus objective20.4.9Risks to a species if its population• Explain the risks to a species if its population size decreases, reducing genetic variation (knowledge of genetic drift is not required)Syllabus objective