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C.3 - Impacts of humans on ecosystems

3.2
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9.3

Assessment statements

DCS Topic Code Statement Guidance
C.3.U1 Introduced alien species can escape into local ecosystems and become invasive.  
C.3.U2 Competitive exclusion and the absence of predators can lead to reduction in the numbers of endemic species when alien species become invasive.  
C.3.U3 Pollutants become concentrated in the tissues of organisms at higher trophic levels by biomagnification.  
C.3.U4 Macroplastic and microplastic debris has accumulated in marine environments.  
C.3.A1 Study of the introduction of cane toads in Australia and one other local example of the introduction of an alien species.  
C.3.A2 Discussion of the trade-off between control of the malarial parasite and DDT pollution.  
C.3.A3 Case study of the impact of marine plastic debris on Laysan albatrosses and one other named species.  
C.3.S1 Analysis of data illustrating the causes and consequences of biomagnification.  
C.3.S2 Evaluation of eradication programmes and biological control as measures to reduce the impact of alien species.  

Video lessons

Battle of the Beaks
Languages
LanguageEvolution.docx
File Size: 295 kb
File Type: docx
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Class activities

Bug Hunters activity
BugHunters.docx
File Size: 670 kb
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Review materials

Review Lecture
  • Home
  • Biology
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      • Topic 1 >
        • 1.1
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        • 2.1
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      • Option A
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    • Internal Assessment >
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  • More
    • Extended Essay
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