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Bio 112

Bio112 April 29th

Subject: 
Biology
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Biology
Ecology
Soil biology
Biogeochemical cycle
Biogeography
Fisheries
Food web
Energy flow
Primary production
Trophic level
Carbon Cycle
Nitrogen cycle
Environment
Bio 112

Bio 112 April 29th, 2013 More on Ecosystems Food webs -Is a branching food chain with complex trophic interactions -Including decomposes (detritevors) Energy Flow through Ecosystems -from one trophic level to the next. Primary production - are photoautotrophs, capturing energy from the sun. Energy flows from these guys through all other levels. Of course some energy will be lost at each level. -light energy converted to chemical energy by autorophs during a given time period. -Gross primary production is the total primary production. -Net primary production is GPP minus energy used by producers (respiration)-only this is available to consumers. NPP is more important then GPP. Secondary production

Bio112 April 26th

Subject: 
Biology
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Tags: 
Biology
Ecology
Symbiosis
Biological pest control
Antipredator adaptations
Mimicry
Batesian mimicry
Herbivore
Carnivore
Seed dispersal
Biological dispersal
Predation
Environment
Bio 112

Bio 112, April 26 2013 Transition for competition to other aspects with in populations. EVOLUTIONARY RACE TO ARMS!!!! Evolutionary Responses -Predator- Prey interactions -Defensive adaptations of prey lead to offensive adaptations of predators -coloration, speed, eye sight, its a back and forth between these populations. -Red Queen Hypothesis (Leigh Van Valen) -evolving as rapidly as they can but not going anywhere. Stay in the same positions in the food chain. -Plant- Herbivore Interactions -Passive defenses -Chemical defenses that plants have in place all the time. Toxic!!! bad taste. -Lower population, be a rare species. -be habitat colonizers, rapid growth and re-populate new areas only. -Physical defenses, such as thorns.
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