Introduction to Ecology February 20 th, 2015. Ecology: deals with different levels of organization.
Regents Biology Ecology & Levels of Organization.
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Transcript of Regents Biology Ecology & Levels of Organization.
Regents Biology
Ecology
study of interactions between the living creatures (biotic factors) & the nonliving factors (abiotic), because…
Everything is connectedto everything else
Regents Biology
Environment The physical, chemical and biological
factors that act upon living things.
Surroundings… The environment ultimately determines
the survival of the organisms!!!
Regents Biology
Levels of Organization of the Environment
1. Species Smallest
2. Population
3. Community
4.Ecosystem
5.Biome
6.Biosphere Largest
Regents Biology
1st Level of Organization
SpeciesA group of organisms so similar that
they can breed and produce fertile offspring.
Ex.
Regents Biology
A Species has a HOME
Habitat:The area an organism live in.
Possible habitats: river, coral reef, deciduous forest
Ex. A lives in a
Regents Biology
A Species has a JOB…
Niche: An organisms role in the ecosystem…what it takes and gives back to that ecosystem.
No two species can
share the same niche or
competition occurs and
one will lose out!
Regents Biology
2nd Level of Organization
Populations
Population- all the organisms of the SAME species that live in the same area
Regents Biology
3rd Level of OrganizationCommunity- populations of different
species that live in the same area
Feeding relationships
Community
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4th Level of Organization
EcosystemAll the organisms that live in a
particular area AND their nonliving environment.
Regents Biology
Living vs. Nonliving FactorsBIOTIC ABIOTIC The living parts of The physical
(nonliving)the environment factors that affect the survival of each organism
Ex: water, air, rock
soil, light, temperature
Ex. Plants, animals, bacteria
Regents Biology
Limiting Factors
An ecosystem only has so many resources…
Limiting Factors: Conditions that limit the growth of a population
Ex: The growth of a bunny population Air Water Food Shelter Predators Temperature Nutrients Space
Regents Biology
5th Level of Organization Biome Click me
a group of ecosystems that have the same climate and similar dominant
communities.
Regents Biology
5th Level of Organization Biome
Biomes may be terrestrial (land) or marine(water) determined by their
geography and climate
Regents Biology
6th Level of Organization:
Biosphere = Earth(Bio =living Sphere = Earth… Living Earth)