BIOL 243 Lecture Notes - Lecture 1: Evapotranspiration, Railways Act 1921, Trophic Cascade

• School: University of Calgary
• Department: Biology
• Course: BIOL 243
• Professor: Steven Michael Vamosi

Document Summary

2 v o g a s a n y a d h t r a e n u s. Gonick & outwater (1996; the cartoon guide to the environment) !6: mostly photosynthetic organisms that fix inorganic nutrients (c, n, p, o, etc. ) into organic molecules, the rate at which biomass is produced is called primary production (pp) Expressed as the amount of c fixed per unit area per unit time (i. e. kj/km/year) Tells us how much energy is captured by an ecosystem. Tells us how much energy is available to consumers. Gross pp (gpp) = total amount of co2 fixed into organic molecules per unit time and unit area. Net pp (npp) = gpp ra where!ra is plant respiration. !13: what factors contribute to an ecosystem"s npp, light. 2. +nutrients l l y h p o r o h. Hayward (1991; trends in ecology & evolution 6:281)