28 terms

Miller & Levine Biology Chapter 4_Thomas

Lessons 1, 2, and 3 vocab words.
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tolerance
ability of an organism to survive and reproduce under circumstances that differ from their optimal conditions
habitat
area 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 those conditions
resource
any necessity of life, such as water, nutrients, light, food, or space
competitive exclusion principle
principle that states that no two species can occupy the same niche in the same habitat at the same time
predation
interaction in which one organism captures and feeds on another organism
symbiosis
relationship in which two species live close together
mutualism
symbiotic relationship in which both species benefit from the relationship
parasitism
symbiotic relationship in which one organism lives on or in another organism and harms it
commensalism
symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
ecological succession
series of gradual changes that occur in a community following a disturbance
primary succession
succession that occurs in an area in which no trace of a previous community is present
pioneer species
first species to populate an area during succession
secondary succession
type of succession that occurs in an area that was only partially destroyed by disturbances
canopy
Dense covering formed by the leafy tops of tall rain forest trees
understory
A layer of shorter plants that grow in the shade of a forest canopy.
deciduous
A tree or shrub that sheds its leaves during a particular season each year
coniferous
refers to trees that produce seed-bearing cones and have thin leaves shaped like needles
humus
organic, dark material remaining after decomposition of living organisms
taiga
Biome in which the winters are cold but summers are mild enough to allow the ground to thaw
permafrost
Layer of permanently frozen subsoil in the tundra
plankton
Tiny organisms that float in the water
phytoplankton
Microscopic, free-floating, autotrophic organisms that function as producers in aquatic ecosystems
wetland
An ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year.
detritus
Collective term for animal and plant remains and other dead matter.
photic zone
Portion of the marine biome that is shallow enough for sunlight to penetrate.
aphotic zone
Permanently dark layer of the oceans below the photic zone
benthos
Bottom-dwelling organisms.