Terms in this set (34)
the branch of biology concerned with the relations between organisms and their environment
group of individuals of the same species that live in the same area
different populations that live together in a certain area
all organisms that live in their place, together with their abiotic environment
the part of earth where life exists
A large region characterized by a specific type of climate and certain types of plant and animal communities
Producer : organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds
Consumer :organism that obtains energy from the foods it consumes( eats)
an organism that gets energy form the sun as food in a process called photosynthesis
heterotroph: organism that relies on other organisms for its energy and food
series of steps in an ecosystem in which organisms transfer energy by eating and being eaten beginning with a producer.
network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem
each step in a food chain or food web
diagram that shows the relative amounts of energy or matter within each trophic level in a food chain or food web
total amount of living tissue within a given trophic level
process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
single essential nutrient that limits productivity in an ecosystem
full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
relationship in which two species live closely together
an ecological succession that begins in an area where no biotic community previously existed, no soil bare rock, example volcano
succession following a disturbance that destroys a community without destroying the soil
the struggle between two or more living things that depend on the same limited resource
interaction in which one organism captures and feeds on another organism
symbiotic relationship in which both species benefit from the relationship
symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed
Symbiotic relationship in which one organism lives in or on another organism (the host) and consequently harms it
recycling nitrogen from one form to the other in the following processes: nitrogen fixation, intake of nitrogen into the organisms, decomposition, denitrification.
Carbon is released from organisms through respiration and decomposition. It is then recycled by photosynthetic producers converting to oxygen.
10 % rule
Only 10% of the total energy produced at each trophic level is available to the next level.
Species not native to ecosystem, but can thrive & displace native species
any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms
The largest population that an environment can support at any given time
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