Interactions between organisms in the Environment
Competition
a relationship that occurs when two or more organisms need the same resource at the same time
Symbiosis
a symbiotic relationship exists between organisms of two different species that live together in direct contact
Commensalism
a symbiotic relationship in which one organism benefits and the organism is not affected
Parasitism
a symbiotic relationship in which one organism benefits at the expense of the other organism (the host)
physical control for invasive species
barriers to prevent species from entering an area or physically removing species
Mutualism
is a symbiotic relationship in which both organisms benefit
Predation
is an interaction between species in which one species hunts, kills, and eats the other
Permeability
Ability of rock or soil to allow water to flow through it
Niche
An organism's particular role in an ecosystem, or how it makes its living.
Biotic
Describes living factors in the environment.
Soil particle size
Gravel, sand, silt, clay
carrying capacity
Largest number of individuals of a population that a environment can support
Emigration
Migration from a location
Immigration
Migration to a new location
abiotic factors
Nonliving components of environment.
population density
Number of individuals per unit area
subsoil
The layer of soil beneath the topsoil that contains mostly clay and other minerals.
bedrock
The solid layer of rock beneath the soil
Soil layers (top to bottom)
Topsoil, subsoil, parent material, bedrock
Chemical control for invasive species
applying poisons to eliminate new species
Humus
material formed from decaying leaves and other organic matter
invasive species
species that enter new ecosystems and multiply, harming native species and their habitats
parent material
the rock material from which the inorganic components of a soil are derived
topsoil
the top layer of soil
Biological control for invasive species
uses living organisms to reduce or eliminate invasive species.
