EVSC 100 Lecture Notes - Lecture 6: Lightning, Lake Superior, Bioavailability

• School: Simon Fraser University
• Department: Environmental Science
• Course: EVSC 100
• Professor: Marnie Branfireun

Document Summary

Midterm q"s on question bank, syllabus, tutorial handouts and on the exam mixed format. The forest is the lungs of the planet false because lungs do the opposite. Focus on the biological carbon cycle: fast/most movement. Nitrogen 78%, carbon 1%, oxygen 21% in atmosphere. N2 inert molecule, no one can use it ;( but n-fixation converts it to usable forms bioavailable (by microbes and lightning) Bacteria is really important (bacterial conversion occurs in the soil) Toxic substances: poison that can cause harm in relatively small amounts. Lake erie: shallow and small compared to lake superior, agricultural water shed, fairly densely populated. Explain the steps of cultural eutrophication and the death of lake erie.