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Ecosystem Ecology

Ecosystem Ecology Study of interactions between communities and physical environment
What 3 points will we be focusing in this section? Nutrient Value / Succession / Energy Flow
Two important principles Energy flow is one way / Nutrients are cycled
Nutrient Flow All elements and compounds cycle through biological and physical environment
Define Biological Living organisms
Define Physical Anything that comes intact to an organism (air, soil, wind, temp)
Atoms can be reused True
Important Biologically elements Water, Oxygen, Phosphorous, Carbon Dioxide, Nitrogen, Carbon
Biogeochemical Cycle The path an element takes as it moves from nonliving parts of the environment through living organisms and back again is referred to as its biogeochemical cycle
Three Principles about BGC cycle ---
1st Principle Not all forms of a chemical are equally available to organisms (Ex. C-C change)
2nd Prinicple Changes in chemical form involve energy--either release or requirement of energy
3rd Prinicple Human activities are disrupting almost all Biogeochemical cycle
Carbon cycle Look at Notes
A decomposer example for the Carbon cycle Boreal forest
Carbon in CO2 is only available to who? Photosynthesizers
What does energy link and release in? Links Carbon molecules and releases in cellular respiration
Release of CO2 is leading to... Global Warming
Phosphorous cycle Look at notes
We need Phosphorous for... Metabolism, DNA, bones & teeth
Phosphates PO4 3- and other forms
2 parts in Phosphorous cycle Living organism, rock & soil geologiclly
Where does Phosphorous export come from? Forest, Agriculture, and Urban
Why does animals need phosphates? For their diets
How do we increase phosphates? Sewage, fertilizer, animal feedlot runoffs
Phosphorous is the 2nd most abundant chemical in what? Fertilizer
What are the consequences of phosphates in rivers and streams? Heavy grow of algae / Death / Decomposition / Change in species composition
Nitrogen cycle Look at notes
What is not equally available to organisms? All forms of chemicals
What is Nitrogen most abundant for? Our atmosphere
Most organisms can't use Nitrogen. But they can use... Nitrogen fixing bacteria
What do plants absorb? Nitrates and Ammonium
What else does animals need in their diet besides phosphates? Amino acids
The most abundant chemical in fertilizer. Nitrates
What is disrupting almost all biogeochemical cycles? Human activities
How does Nitrates destroy streams? Causes algal to bloom, followed by death, Oxygen depletion, kills fish and shellfish (also causes human health)
How is releasing Nitrates from fossil fuels cause a problem? Contributes to acid decomposition, global warming, and smog formation
The higher the population... The higher the nitrates
What are Nitrates sources? Fertilizer, Fossil fuels, Sewage, Feedlots
Acid deposition arises from the formation of what? Sulfric acid and nitric acid after burning (snow, rain, dry)
Basic liquids are more damaging than... Acidic liquids
Basic ranges from -7 (neutral/water) to -14
Acidic ranges from 0 to -7 (neutral/water)
Acidic liquids order from neutral to 0 Urine, Coffee, Beer, Lemon Juice, Lime Juice, Stomach Acid
Basic liquids order from neutral to -14 Blood, Sea Water, Baking Soda, Bleach, Ammonia, Oven Cleaner
Winds flow from what direction? West to East
Effect of Acid Deposition Increase Human Resp. Damage / Weakens trees / Decrease Soil Fertility / Possible decrease bird population
What can we reduce to improve human respiratory system? (Asmatic) Burning Fossil Fuels
What can we do? Conserve energy / Support politicans who advocate conservation / Carpool / Reuse, Recycle / Compost / Turn off lights / Thermostate
Created by: animalsavior