AP BIO unit 8

Group of individuals of same species in same area at same time

Sunlight & temperature, Precipitation & water, Soil & nutrients

Other living organisms (Prey, Competitors, Parasites, Bateria)

Clumped, uniform, random

Can change from births, death, immigration, emigration

Late reproduction, Few offspring

Early reproduction, Many offspring

Rapid growth, No constraints

Limited growth, Environmental constraints

Competition, Predators, parasites (biotic)

Sunlight, Temperature, Weather (abiotic)

All the organisms that live together in a place

organisms ecological role

No two similar species can occupy the same niche at the same time

(- , -)

(- , +)

(- , +)

(+ , +)

(+ , 0)

Apo = away, Sematic = sign or meaning

harmless species mimics harmful model

poison species have same coloration

count of how many different species in a community

percent each species makes up

More food resources, More habitats, More resilience

Influential ecological role, increases diversity in habitat

food chain length is limited by the inefficiency of energy transfer

about 1%

10%

sequence of community changes

Begins in an area without soil, then bacteria makes soil and vegetation follows

Existing community is cleared, but base soil is still intact

plant community dominated by trees

High death rate in post-reproductive years

Constant mortality rate throughout life span

Very high early mortality but the few survivors then live long