Dynamics of Ecosystems

Each one opens on YouTube. The same ▶ badges appear beside the cram points and notes they explain.

• Whole-chapter tour of ecosystem dynamics: energy flow, trophic levels, and why matter cyclesEcosystem Ecology: Links in the Chain - Crash Course Ecology #7CrashCourse
• What a biogeochemical cycle is, plus reservoirs and fluxes as a shared frameworkBiogeochemical cycles | Ecology | Khan AcademyKhan Academy
• The water and carbon cycles together, with the human fingerprint on eachThe Hydrologic and Carbon Cycles: Always Recycle! - Crash Course Ecology #8CrashCourse
• The water cycle on its own: evaporation, transpiration, precipitation, and groundwater reservoirsThe water cycle | Ecology | Khan AcademyKhan Academy
• The carbon cycle: reservoirs and fluxes among atmosphere, biomass, oceans, and fossil fuelsThe carbon cycle | Middle school Earth and space science | Khan AcademyKhan Academy
• The nitrogen cycle step by step: fixation, nitrification, ammonification, denitrificationThe nitrogen cycle | Energy and matter in biological systems | High school biology | Khan AcademyKhan Academy
• Nitrogen and phosphorus as limiting nutrients, and what fertilizer runoff does to themNitrogen & Phosphorus Cycles: Always Recycle! Part 2 - Crash Course Ecology #9CrashCourse
• The phosphorus cycle: the sedimentary cycle with no atmospheric reservoirPhosphorous cycle | Ecology | Khan AcademyKhan Academy
• How energy enters and moves through an ecosystem, and why it flows rather than cyclesEnergy Flow in EcosystemsBozeman Science
• Primary productivity, and the difference between gross and net primary productivityPrimary productivity in ecosystems| Matter and Energy Flow| AP Environmental Science| Khan AcademyKhan Academy
• Trophic levels defined, with the 10% rule and why food chains stay shortWhat Are Trophic Levels? | Ecology & Environment | Biology | FuseSchoolFuseSchool - Global Education
• Reading ecological pyramids and predicting what happens when one level is disturbedImpact of changes to trophic pyramids | High school biology | Khan AcademyKhan Academy
• Food chains versus food webs, energy pyramids, and the link to biodiversityFood Webs and Energy Pyramids: Bedrocks of BiodiversityAmoeba Sisters
• The Yellowstone wolf trophic cascade, the classic top-down control storyHow Wolves Change RiversSustainable Human
• Predation, keystone predators, and how top-down control shapes a communityCommunity Ecology II: Predators - Crash Course Ecology #5CrashCourse
• The Cedar Creek experiments: how species richness affects stability and productivityBiodiversity Research at Cedar CreekInstitute on the Environment, University of Minnesota
• Full lecture on the MacArthur-Wilson equilibrium model, area and distance effects29. Island Biogeography and Invasive SpeciesYaleCourses