Ecology and Population
A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.
Ecology: Populations
How do populations change over time?
What factors limit population growth?
How population ecology studies the density, distribution, size, sex ration, and age structure of populations. Intrinsic growth rate and exponential growth calculations are included along with a discussion of logistic growth. K-selected and r-selected species are explained along with survivorship curves.
Ecosystems and Populations
Organism, Population, Community, and Ecosystem
Levels of Ecology
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