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autotroph
Organism that makes its own food from CO2 molecules
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Carrying Capacity
the maximum population size of a given species that live together and reproduce
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coevolution
when two or more species that do not interbreed evolve together because they have a close ecological relationship
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diversity
all the species, their genetice variability and/or the sets of functional processes that maintain complex systems on earth
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ecosystem
biological communities and their interaction with the abiotic environment
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evolution
the process of change over time of traits in organisms,populations, and species
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exponential growth equation
dN/dt=rmaxN
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habitat
the place where an organism lives
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heterotroph
organism that gets its nourishment from the organic compounds of other organisms
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intraspecific competition
density dependence; organisms of the same species compete for a resource
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logistic growth equation
dN/dt=rmax [(K-N)/K]
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Maximum Sustainable Yield
largest possible take or harvest from a population
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John Muir
Viewed nature as havin intrinsic value;a preservationist
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Natural Selection
Exolutionary process by which the frequency og genetic traits in a population change because of differential survival and reproductive success of the individuals in the population
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Nice
The total uses that a species makes of the biotic and abiotic resources in its environment;n-dimensional hyperspace occupied by a species
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Gifford Pinchot
Thought nature should be used for the greatest good for the greatest number of people for the longest time; a conservationalist
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population
A group of organisms of the same species that live together and reproduce
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popuilation density
the number of individuals in a given area
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productivity
the rate of storage of radiant energy as organic substances usable food materials
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respiration
the rate of carbon usage by a plant to support itself, or by a consumer to metabolize, grow, move
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resources
all things consumed or used by an organism
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specific natality rate
per capita rate of population increase in a given time
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turnover
- the amount of time it takes for a system to replace itself
- ratio of throughput to content
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44nm-700nm
- the spectral range of solar radiation used in primary production by green plants
- PAR
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survivorship rate
Is equal 1 - mortality rate
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biomass
energy stored in an ecosysten, usually in the form of carbon
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regime shift
reorganization of an ecosystem from one stable state to another
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ecosystem service
the benefit obtained gfrom nature by humans
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steno (thermal, phagic, haline, etc)
- narrow tolerance to ________
- temperature, food, salt
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eury (thermal, phagic, haline)
- wide tolerance
- temperature, food, salt
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food-to-fiber ratio
a measure of the part of the plant useful to humans in agricultural yield
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net primary productivity
carbon fixed but not used for respiration
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externality
an unintended consequence of an action which can be positive or negative
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sere
a product of succession, the sequence of communities that replace one another
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trophic level
all organisms that get their energy from the same type of source
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