Population Distribution And abundance Flashcards
A group of individuals of a single species inhabiting a specific area
Population
The total number of individuals, or biomass, of a species in a specific area
Abundance
According to him, niche centered around the influences of the physical environment
Joseph grinnell
According to him, niche included biological interactions, as well as biotic factors
Charles Elton
Is the actual niche of a species whose distribution is limited by biotic interactions
Realized niche
Restricted to upper intertidal zone
Chthamalus stellatus
Limited to middle and lower intertidal zone
Balanus balanoides
Refers to small distances over which there is a little environmental change
Small scale
Refers to areas over which there is substantial environmental change
Large scale
Basic pattern of distribution observed on small scale
Random
Regular
Clumped
Individual has an equal probability of occuring anywhere in an area
Random
Individuals are uniformly spaced through the environment
Regular
Individuals live in areas of high local abundance
Clumped
High density and appear as red patches
Hot spots
