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9 Growth of a system in which the amount being added to the system is proportional to the amount already present: the bigger the system is, the greater the increase.
11 the natural arrangement and apportionment of the various forms of animals and plants in the different regions and localities of the earth.
12 the process of change in the species structure of an ecological community over time.
14 is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
15 is the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment.
16 the development of plant and animal life in an area without topsoil; the development of biotic communities in a previously uninhabited and barren habitat with little or no soil
17 is a process started by an event (e.g. forest fire, harvesting, hurricane) that reduces an already established ecosystem (e.g. a forest or a wheat field) to a smaller population of species
19 the loss or removal of nitrogen or nitrogen compounds; specifically : reduction of nitrates or nitrites commonly by bacteria (as in soil) that usually results in the escape of nitrogen into the air.
21 the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.
1 occurs when the growth rate decreases as the population reaches carrying capacity.
2 is the property of biological systems to remain diverse and productive indefinitely.
3 The rate, or speed, at which the number of organisms in a population increases.This can be calculated by dividing the change in the number of organisms from one point in time to another by the amount of time in the interval between the points of time
4 the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.
5 the series of processes by which carbon compounds are interconverted in the environment, chiefly involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dea
6 rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulfur and nitro
7 resources are environmental conditions that limit the growth, abundance, or distribution of an organism or a population of organisms in an ecosystem.
8 the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans.
10 composed of phytoplankton known to naturally produce biotoxins, they can occur when certain types of microscopic algae grow quickly in water, forming visible patches that may harm the health of the environment, plants, or animals.
13 the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.
18 the way in which an organism fits into an ecological community or ecosystem.
20 the mass of living biological organisms in a given area or ecosystem at a given time.
22 dealing with the relations and interactions between organisms and their environment, including other organisms
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