CSU FW 104 - Biochemical Cycles (3 pages)

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Biochemical Cycles

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Biochemical Cycles


Biochemical cycles, Scientific method, Theories and Laws

Lecture number:
Lecture Note
Colorado State University- Fort Collins
Fw 104 - Wildlife Ecology and Conservation (GT-SC2)

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FW 104 1nd Edition Lecture 6 Outline of Last Lecture I Community A Species Interactions in the Community 1 Predation Prey 2 Parasitism 3 Mutualism 4 Commensalism 5 Competition B Ecosystem C Food Chains D Food Webs E Energy Outline of Current Lecture I Biochemical Cycles 1 Carbon Cycle 2 Nitrogen Cycle 3 Water Cycle 4 Phosphorous Cycle 5 Sulfur Cycle 6 Green House Effect II Scientific Methods III Theories and Laws Current Lecture I Biochemical Cycles cycling from nonliving environment to living organisms and back again These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 1 Carbon Cycle carbon dioxide in and out cellular respiration CO2 wastes photosynthesis CO2 used sugars Energy Primary producers and consumers Human impact and interactions 2 Nitrogen Cycle most Nitrogen is fixed by bacteria limiting factor taken up by the soil through lightning and cosmic radiation can also fix nitrogen natural and necessary cycles except when in excess burning fossil fuels nitric acid which can get into the rain and cause acid rain human impacts which is our excess wastes like fertilizers sewage feedlots runoff Algal blooms from run off plants grow eutrophication then decompose deplete oxygen for aquatic animals 3 Water Cycle Living organisms limiting factor Evaporation heat breaks bonds in atmosphere Condensation cools Hydrogen bonds reform precipitation transpiration major nutrient transports mechanism through the air atmosphere water underground human impacts excess nutrients pollution water withdrawal landscape modifications which interrupts cycle climate change 4 Phosphorous Cycle occurs on very localized scale often limiting does not occur in the atmosphere backbone to DNA teeth tissue bones etc leached out through erosion human impacts mine if for fertilizers and detergents runoff algal booms 5 Sulfur Cycle much tied up in underground sulfide rocks volcanic action gas pools

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