This presentation and word doc for IB DP Environmental Systems and Societies unit 2 Ecology with content, tasks for students and additional links is helpful preparation for the Internal Assessment and includes:
How we study ecosystems
Abiotic factors (e.g., pH, light, temperature)
Tools for measuring abiotic factors
Field methods: light meter, rain gauge, Secchi disk
Where to measure environmental variables
Biotic factors (species richness, diversity, biomass)
Sampling tools: sweep nets, pooters, kick sampling
School garden task – plant richness & abundance
Species identification – dichotomous keys
Challenges of large-scale surveys
quadrats/transects
Sampling strategy – random vs stratified
Case Study: Insects – Lincoln Index
Case Study: Birds – observation
Case Study: Large mammals – camera traps
Population estimate activity – Site B
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