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Nutrient Cycles

BIOL 1113 review 4

TermDefinition
niche total abiotic and biotic resources a species exploits for life
Producers bottom of food chain; use photosynthesis to create food from sun energy
Primary Consumers consume producers for nutrients
Secondary, Tertiary, etc. Consumers consume lower members of food chain
Decomposers consume detritus
detritus waste/debris of consumers
nitrogen fixation bacteria/archaea convert N2 to ammonium ions (NH4+)
purpose of nitrogen cycle atmosphere is 78% nitrogen, most life forms cannot use nitrogen
nitrification bacteria/archaea convert ammonium ions (NH4+) into nitrate (NO3-)
purpose of nitrification remove ammonia, derive energy
denitrification bacteria/arachae convert nitrate (NO3-) to N2
purpose of denitrification return nitrogen to atmosphere
step of nitrogen cycle that is also part of anaerobic respiration denitrification
Carbon is absorbed from atmosphere autotrophs use CO2 in photosynthesis and in their tissues
Carbon is released into atmosphere Cellular respiration releases CO2 as waste; dead animals/waste release C into soil/water
humus decay-resistant soil carbon
largest carbon reservoir oceans
CO2 dissolves into ocean CO2 reacts with ocean to create carbonic acid (H2CO3); CO2 reacts with calcium in ocean to form precipitates on ocean floor
The ocean is becoming more acidic CO2 increasing in atmosphere, reacting more to create more carbonic acid and precipitate
evaporation of water water heats up and rises as water vapor
precipitation of water water cools in clouds and falls back to earth
runoff of water precipitation flows into water pools
percolation of water water soaks into ground
organism means of returning water to cycle evaporation and urination
transpiration of water evaporation of water from leaf
Created by: oclar11
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