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average residence time
a measure of time it takes for a given part of the total pool or reservoir of a particular material in a system to be cycled
all the parts of the planet that are inhabited by living things; sum of all Earth's ecosystems
all the organisms of all species living in an area or region up to and including the biosphere
a system that allows the exchange of energy, but not matter, between the system and its surroundings
a system formed by the interaction of a community of organisms with their physical environment
a principle of environment sciences that states that everything affects everything else, meaning that particular course of action leads to an entire potential string of events
population growth pattern where a population grows faster as it increases in size
a kind of system response that occurs when output of the system also serves as input leading to changes in the system (positive and negative)
states that the environment on a global level has been changed for the better by life over the history of life on earth
a type of feedback that occurs when the system's response is in the opposite direction of the output; negative feedback is self-regulating
overshoot and collapse
this occurs when growth in one part of a system over time exceeds carrying capacity, resulting in sudden decline in one or both parts of the system
a type of feedback that occurs when an increase in output leads to a further increase in output
when input equals output in a system, there is no net change and the system is said to be in equilibrium
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