BIOL 11000 Lecture Notes - Lecture 20: Carbon Sink, Carbon Footprint, Eutrophication
20 Dec 2017
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Eutrophication: aquatic ecosystem ends up mostly dead because of too much of a good thing. Secondary production: autotrophic matter converted to heterotrophic matter. Primary consumers ~1/6 of global npp, lost through excretion. Production efficiency: consumption efficiency stored in the consumer. Net secondary production: energy stored in biomass represented by growth & reproduction (same as production efficiency) Trophic efficiency: % production transferred up trophic levels. Higher up in the food chain, the more organisms have to be consumed to be sustained. 75% nutrients stored in tree trunks, 10% in soil. Water is essential to all organisms--most need it in the liquid form. 1% planet"s water drinkable in the form in which you found it. Evaporation--little pools of sta(cid:374)di(cid:374)g (cid:449)ate(cid:396) (cid:449)ate(cid:396) goes f(cid:396)o(cid:373) li(cid:395)uid to gas. Condensation--gas goes back to liquid form and precipitates back down in. Water can leave an ecosystem but it can never leave the planet. Autotrophs convert carbon to forms used by heterotrophs.
