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Chapter 52
Vocabulary & Key Concepts
30
Biology
Undergraduate 1
03/23/2014

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Term
ecology
Definition
the study of how organisms interact with each other and their environment
Term
5 main levels of ecology
Definition
1. organisms
2. populations
3. communities
4. ecosystems
5. the biosphere
Term
organismal ecology
Definition
how individuals interact with each other and their physical environment
Term
population ecology
Definition
how & why population size changes over space & time
Term
community ecology
Definition
how species interact & the consequences
Term
ecosystem ecology
Definition
how energy & nutrients cycle through the environment
Term
global ecology
Definition
how the biosphere is affected by global changes in nutrient cycling & climate
Term
population
Definition
a group of individuals of the same species that lives in the same area at the same time
Term
community
Definition
populations of different species that interact with each other within a particular area
Term
ecosystem
Definition
all the organisms in a particular region along with nonliving components
Term
abiotic
Definition
not living components of an ecosystem
Term
biosphere
Definition
a thin zone surrounding the earth where all life exists - the sum of all terrestrial & aquatic ecosystems
Term
conservation biology
Definition
the effort to study, preserve, & restore threatened genetic diversity in populations, species diversity in communities, & ecosystem function
Term
biogeography
Definition
the study of how organisms are distributed geographically
Term
range
Definition
geographic distribution of organisms
Term
biotic
Definition
the living factors of an ecosystem
Term
dispersal
Definition
the movement of individuals from their place of origin to the location where they live & breed as adults
Term
exotic species
Definition
one not native to the environment
Term
invasive species
Definition
an exotic species that is introduced to a new area, spreads rapidly, & competes successfully with native species
Term
climate
Definition
the prevailing, long-term weather conditions found in an area
Term
weather
Definition
the specific short-term atmospheric conditions of temperature, precipitation, sunlight, & wind
Term
Hadley cell
Definition
a major cycle in global air circulation responsible for making the Amazon River basin wet & the Sahara Desert dry
Term
rain shadow
Definition
areas that receive dry air that loses its moisture after passing the crest of a mountain range
Term
biomes
Definition
regions characterized by distinct abiotic characteristics & dominant types of vegetation
Term
4 abiotic conditions associated with the different biomes
Definition
1. temperature
2. moisture
3. sunlight
4. wind
Term
2 things that determine the nature of a terrestrial biome that develops in a particular region
Definition
1. average annual temperature & precipitation
2. annual variation in temperature & precipitation
Term
net primary productivity/NPP
Definition
the total amount of carbon that is fixed per year minus the amount that is oxidized during cellular respiration
Term
aboveground biomass
Definition
the total mass of living plants, excluding roots
Term
salinity
Definition
the number of grams of solute per kilogram of water
Term
turbidity
Definition
cloudiness of water
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