BIOA02H3 Lecture Notes - Lecture 32: Trophic Cascade, Solar Irradiance, Herbivore
43
BIOA02H3 Full Course Notes
Verified Note
43 documents
Document Summary
Nutrient cycle: thru ecosystem i. e. primary producer turn inorganic c&n into organic -> consumer gain access to nutrient by eating -> decomposer return c&n to inorganic form. Org @ higher trophic lv may consume more than stated @ food web cuz e. g. sometimes herbivore eat grass x hunger medication -> too much grass = vomit. Liebig"s law of the minimum: primary production limited by least available nutrient i. e. as long as lack 1 nutrient even if all other nutrients in excess still = x growth; (analogy = barrel) Explain resource competition among 2 species as well -> mutual resource used = lowest slat. Remove species from community may = food web unraveling. Direct e ect: 1 species" in uence @ another thru interaction e. g. predator vs prey - Indirect e ect: 1 species" in uence @ another thru intermediaries e. g. predator a ect another predator cuz feed on same prey. Bottom-up regulation: nutrient availability @ food chain bottom controls biomass.
