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SLS Bio11 Ecology MD

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Term
Definition
carrying capacity   the most numerous amount of organisms in a specific species that can survive in their environment in terms of food, water, shelter, etc.  
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chemical equations   6 CO2 + 6 H2O + Sunlight = C6H12O6 + 6 O2 (photosynthesis) C6H12O6 + 6 O2 = 6 CO2 + 6 H2O + ATP (cellular respiration)  
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climax community   An ecologically balanced environment in which all of the populations of the species are stable. The final stage of succession.  
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commensalism   A type of symbiosis where species A gains something from species B without damaging species B or helping species B.  
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consumer   A species of organisms that gain energy from producers. AKA Heterotrophs.  
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consumer growth   When there is an exponential amount of increase in the populations of consumers.  
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decomposer   an organism that breaks down (decomposes) organic material and makes it available for producers to gain energy from.AKA saprophytes  
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density-dependent factors   A factor limiting the size of a population whose effect is dependent on the number of individuals in the population.  
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density-independent factors   A factor limiting the size of a population whose effect is not dependent on the number of individuals in the population.  
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ecological succession   the observed process of change in the species structure of an ecological community over time  
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energy flow   the flow of energy through a biological food chain  
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exponential growth   growth whose rate becomes ever more rapid in proportion to the growing total number or size.  
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pyramid of energy   A graphical model of energy flow in a community. The different levels represent different groups of organisms that might compose a food chain.  
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reactants   The reatants from the processes of photosynthesis and cellular respiration  
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steady state   homeostasis, any matter entering the ecosystem is equivalent to the matter exiting the system  
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symbiosis   interaction between two different organisms living in close physical association, typically to the advantage of both.  
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logistic growth   occurs when the growth rate decreases as the population reaches carrying capacity  
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mutualism   when both of the species in the relationship benefit each other  
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parasitism   when species A benefits species B but damages species B by doing so  
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photosynthesis   the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct  
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pioneer species   The species that came into the ecosystem first and brought in other species along with it afterwards  
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population   the number of organisms in a specific ecosystem that belong to a certain species  
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producer   Producers are organisms that can make their own energy through biochemical processes, which are just processes in living things that involve chemical reactions. Also called autotrophs, the usual way producers make energy is through photosynthesis  
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products   The products from the processes of photosynthesis and cellular respiration  
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