Chapter 4 - Ecosystems and Communities

+ Examples and Biomes
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Terms in this set (...)

Weather
The day to day condition of the Earth's Atmosphere, including temp., precipitation, and other factors.
Climate
average year-to-year conditions in an area over long periods of time
greenhouse effect
process in which carbon dioxide, methane, and water vapor trap sunlight energy in Earth's atmosphere as heat
Habitat
where an organism lives including the biotic and abiotic factors that affect it
niche
full range of physical and biological conditions in which an organism lives and the way in which the organism uses them.
resource
refers to any necessity of life, such as water, nutrients, light, food, or space
competitive exclusion principle
states that no two species can occupy the same niche in the same habitat at the same time
Predation
one organism (predator) captures and feeds on another organism (prey)
Herbivory
An interaction in which herbivore feeds on producers (plants)
keystone species
single species that is not usually abundant in a community yet exerts strong control on the surface of a community
Symbiosis
relationship in which two species live close together
Mutualism
Both species benefit from each other
Parasitism
relationships in which one organism lives inside or on another organism and harms it
Commensalism
A relationship in which one organism benefits and the other is neither helped nor harmed
Ecological succession
a series of more or less predictable changes that occur in a community following a disturbance
Primary succession
succession that begins in an area with no remnants of an older community
Pioneer species
the first species to colonize barren areas during succession
Secondary succession
type of succession that occurs in an area that was only partially destroyed by disturbances