UNIT 2A: ECOLOGY
Chapter 4, Section 1: Ecosystems- Everything is connected.
Standards: SCSH7c, SEV2a, SEV2b
What are the components
of an ecosystem?
What is the relationship
between biotic & abiotic
factors?
What are the levels of life
that are studied by
ecologists?
Name ___________________________
1. _____________________________
• Place where an organism __________________
• Animals and plants are well _______________ for the habitat in
which they live
• How many habitats are in this picture?
2. Biotic factors
• _________________________________ parts of an ecosystem.
• Ex: plants, animals, dead organisms & parts of organisms
3. Abiotic factors
• ________________________________ parts of an ecosystem
• Ex: air, water, rocks, sand, light, temperature
 Biotic & Abiotic factors _________________________ each other.
 Ex: The ____________________________________ (abiotic) will affect
the survival of coral (biotic).
 Ex: Fish (biotic) excrete nitrogen waste into a pond increasing
________________________________ (abiotic).
Organism
 An _________________________________________________.
 Ex: A caribou, a fire ant; a bacterium; a human
Population
 All the members of the same species that __________________
at the same time.
 Ex: all the caribou in eastern Alaska, all fire ants that live in an ant
mound in your backyard. All E. coli that live in your intestine.
Community
 Group of ______________________________ that live in the
same place and interact with each other.
 Only consists of ______________________ components
 Ex: all the trees, moss, caribou, moose, bobcats, beaver, owls,
rabbits in this area of the Taiga (Boreal forest)
Ecosystem
 Interactions between all ________________________________
components.
 Ex: The interaction between the stream, oxygen levels in the
stream, fish, grizzly bears, plants, moose, eagles, atmosphere, soil
Biome
 Collection of _________________________________________
 All areas that have low precipitation, low temperatures,
dominated by evergreen trees and acidic soil are characterized as
Taiga/Boreal forest.
Mneumonic Device: Offer Persian Cats Evil Biscuits
Organism, Population, Community, Ecosystem, Biome
Summarize what you learned today…