Ms. Frost  A world of biology.....
  • Welcome
    • About me
    • IB Calendar
  • IB: Introduction to cells
    • Origin of Cells
    • Membrane Structure and transport
    • Cell division
    • Structure of DNA and RNA
    • DNA Replication
    • Transcription and gene expression
    • Translation
  • Molecules to Metabolism
    • Molecular diagrams
    • Water
    • Carbohydrates and Lipids
    • Proteins and Enzymes
    • Lactase / Enzyme Inhibition
    • Cellular Respiration
    • Phases of Cellular Respiration
    • Earth atmosphere / Color
    • Photosynthesis
  • Digestion and absorption
    • The kidney and osmoregulation
    • Neurons and synapses
    • Muscle and Movement
    • The blood system
    • Gas exchange
    • Defense against infectious disease
    • Antibody production and vaccination
    • Hormones, Homeostasis
    • Sexual reproduction
  • Genetic modification and biotechnology
  • Genetics and Genes
    • Chromosomes
    • Meoisis
    • Inheritance
    • MORE Inheritance
  • Evidence of evolution
    • Natural selection
    • Gene pools and speciation
    • Classification of biodiversity
    • Cladisitics
  • Ecology Species, communities and ecosystems
    • Energy Flow
    • Carbon Cycling
    • Climate change
  • Option C: Species and communities
    • Option C: Communities and ecosystems
    • Option C: Impacts of human on ecosystems
    • Option C: Conservation of biodiversity
  • Plants: Transport in the xylem of plants
    • Transport in the phloem of plants
    • Growth in plants
    • Reproduction in plants
  • Anatomy Language
    • Epithelial/Connective/Skeletal
    • Muscular / Nervous Tussue
    • Heart
  • Western Hills Website
  • Science in the News
  • World Population Clock
  • Pre AP Biology
  • Blog

Option C: Impacts of humans on ecosystems


Pollutants become concentrated in the tissues of organisms at higher trophic levels by biomagnification.
​
Skill: Analysis of data illustrating the causes and consequences of biomagnification.  Click link to illustrate NOAA biomagnification of mercury levels in fish and birds.  
Biomagnification
Picture

 Competitive exclusion and the absence of predators can lead to reduction in the numbers of endemic species when alien species become invasive

This interactive simulation shows how populations behave when grown alone or when mixed together.  This is competitive exclusion - how can this be illustrated with an invasive species population?
Population Biology

Introduced alien species can escape into local ecosystems and become invasive.
Application: Study of the introduction of cane toads in Australia and one other local example of the introduction of an alien species.

Skill: Evaluation of eradication programmes and biological control as measures to reduce the impact of alien species.

Click the link to read about biocontrol of invasive species in Australia.
invasive species

Application: Discussion of the trade-off between control of the malarial
parasite and DDT pollution.


 Macroplastic and microplastic debris has accumulated in marine environments. 
​Application: Case study of the impact of marine plastic debris on Laysan
albatrosses and one other named species.



International-mindedness:
Over 100 countries across the globe have agreed to ban the production of CFCs to reduce the depletion of the ozone layer.

Aims:
Aim 8: Many developed countries export toxic waste to less developed countries. Is financial compensation a fair exchange for hazardous waste?
Powered by Create your own unique website with customizable templates.