Transcript Levels of Biological Organization

Levels of Biological
Organization
From the whole to the individual
Levels of Biological
Organization
 The Earth is a big place!
 It is covered with land and water biomes.
 In each biome are thousands of living and non
living things.
 Every thing that exists in the earth (alive or not)
has an affect on the other things around it.
 The stages that things affect all life at different
levels, makes up the Levels of Biological
Organization.
Levels of Biological
Organization
Ecology
 The study of
organisms and their
interactions with the
physical features of
their environment.
 From Greek:
 Eco comes from
Oikos – “house”
 -logy – “the study of”
Organism
 A living thing.
Biosphere
 The outer
layer of
the earth
(like the
peel of an
orange)
that
contains
all living
things and
the things
they need
to
survive).
Biotic vs. Abiotic Factors
Biotic:
Abiotic:
A living thing.
A non-living thing. Never was
alive. Light, temperature, gases,
water, rock.
Ecosystem
 A biotic community and the abiotic factors that
affect it.
Community
 Groups of
populations that
interact together.
(Only living
things!)
Interactions in
Communities
 An interaction is how two or more organisms act
while they are around each other.
 There are lots of possibilities that could take place.
 Brainstorm…
Predation
 One species feeds on another species.
Symbiosis
 Symbiosis means that two organisms are living
together without attempting to kill each other.
 Sometimes this is a good way to live together, and
sometimes not so good and one organism
possibly dies even though that was not the intent.
 There are three types of symbiosis:
 Mutualism
 Commensalism
 Parasitism
Mutualism
 Two species help each other and both benefit.
Commensalism
 One species benefits and one species gets nothing
from the relationship.
Parastism
 One species benefits and one species gets hurt from
the relationship. The harm is unintentional.
Population Density
 The number of individual species per unit area.
Limiting Factor
 The factor or reason that a
population cannot get any bigger.
Carrying Capacity
 The amount of species that can
live in an area. How many the area
can support.
Population
 Individuals
of the same
species
living
together that
can breed.
Habitat
 A home or an area where a
species lives.
Niche
 The role or job or an organism in its environment.
Species
 A single living thing,
an organism.
Beyond Organism