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22 Cards in this Set

  • Front
  • Back
aphotic zone
The part of the ocean beneath the photic zone, where light does not penetrate sufficiently for photosynthesis to occur.
One of the world's major communities, classified according to the predominant vegetation and characterized by adaptations of organisms to that particular environment.
A symbiotic relationship in which the symbiont benefits but the host is neither helped nor harmed. See Symbiosis.
competitive exclusion principle
The concept that when the populations of two species compete for the same limited resources, one population will use the resources more efficiently and have a reproductive advantage that will eventually lead to the elimination of the other population.
Refers to plants that shed their leaves at a certain season.
Dead organic matter.
ecological succession
Transition in the species composition of a biological community, often following ecological disturbance of the community; the establishment of a biological community in an area virtually barren of life.
greenhouse effect
The warming of planet Earth due to the atmospheric accumulation of carbon dioxide, which absorbs infrared radiation and slows its escape from the irradiated Earth.
The place in which individuals of a particular species can usually be found.
A symbiotic relationship in which both the host and the symbiont benefit. See Symbiosis.
See Ecological niche.
A symbiotic relationship in which the symbiont (parasite) benefits at the expense of the host by living either within the host (endoparasite) or outside the host (ectoparasite). See Symbiosis.
photic zone
The narrow top slice of the ocean, where light permeates sufficiently for photosynthesis to occur.
Aquatic, free-floating, microscopic, photosynthetic organisms.
Mostly microscopic organisms that drift passively or swim weakly near the surface of oceans, ponds, and lakes.
An interaction between species in which one species, the predator, eats the other, the prey.
primary succession
A type of ecological succession that occurs in an area where there were originally no organisms.
resource partitioning
The division of environmental resources by coexisting species populations such that the niche of each species differs by one or more significant factors from the niches of all coexisting species populations.
secondary succession
A type of succession that occurs where an existing community has been severely cleared by some disturbance.
An ecological relationship between organisms of two different species that live together in direct contact.
The coniferous or boreal forest biome, characterized by considerable snow, harsh winters, short summers, and evergreen trees.
A collective term for the nonphotosynthetic organisms present in plankton.