APES Ch 3
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22 Terms
Disturbance
An event caused by, physical, chemical, or biological agents, resulting in changes in population size or community compostition
Resistance
A measure of how much a disturbance can affect flows of energy
+ matter in an ecosystem
Resilience
The rate at which on ecosystem returns to its original state after a disturbance
Restoration ecology
The study and implementation of restoring damaged ecosystems
Intermediate Disturbance Hypothesis
ecosystems experiencing intermediate levels of disturbance are more diverse than those with high or low disturbance levels
Watershed
all land in a given landscape that drains into a particular stream, river, lake, or wetland
Nitrogen fixation
Process that converts Nitrogen gas into a form that producers can use
Nitrification
conversion of ammonia (NH+4) into Nitrite (NO-2) + Nitrate (NO-2)
Assimilation
process by which producers incorporate the nutrients into tissues
Mineralization
process by which Fungal + bacterial decomposers break down organic matter found in dead bodies + waste products + convert it into inorganic matter
Ammonification
like mineralization, but breaks materials down + converts it into inorganic ammonium (NH+4)
Denitrification
conversion of Nitrate into the gasses Nitrous oxide(N2O) + Nitrogen gas (N2), which is emitted into the atmosphere
Flows
The process that move matter between pools
pools
components that contain the matter
Biogeochemical cycles
the movement of matter within + between ecosystems
Gross Primary Productivity
the total amount of solar energy that the producer in an ecosystem capture via photosynthesis over a given amount of time
Net Primary Productivity
the energy captured by photosynthesis producers in an ecosystem minus the energy producers respire
Autotroph
producer that use the sun’s energy to produce usable forms of energy
heterotroph
consumers that are incapable of photosynthesis and must obtain energy by consuming other organisms
respiration
how organsims unlock energy from chemical compounds
glucose
C6H12O6
Note 
Flashcards (23)