Abiotic and Biotic Factors Modified
Levels of organization in an ecosystem
____________________ An individual form of life.
Plant
______________
Bacterium
Protist
______________ All the individuals of a given species in an area at a given
time.
______________ The populations of organisms of different species in a given
area and time.
______________ All the living (biotic) and nonliving (abiotic) factors in an
area.
Ecosystems support only certain numbers based on the amount of
______________.
Water,
______________,
Mates.
Biotic Factors Bio = _____________
______________ organisms in an ecosystem.
Animals, ________________. Fungi, and _______________
Abiotic Factors A = ____________________
______________ elements in an ecosystem.
Water, _______________, soil – rocks and minerals, _______________, and
________________________
Carrying Capacity
The largest number of ________________ that an area can support.
If the _________________ exceeds the carrying capacity, some will die or
move to new locations.
Determined by elements called _________________ _______________.
Abiotic and Biotic Factors Modified
Limiting Factors
An _______________ or ___________________ factor that limits the number of
individuals that can line in an ecosystem.
Keep the _________________ from growing too large.
How do biotic factors limit other organisms in its environment
Competition for food - When resources are ___________ fewer organisms
can survive. When plentiful _______________ numbers can survive.
Predator-prey relationships – Greater the number of prey the _____________
the number of predators. Fewer Prey, the ____________ predators.
Parasitism – When an ____________ lives off a host organism sometimes killing
the host.
Disease – When outbreaks ________ _________ most or all of a population.
Human activities like __________________, _________________ ______________;
clear cutting forest destroy animal habitats.
How do abiotic factors limit other organisms in its environment
Sun – availability increases _____________________ Plants compete for
sunlight by growing ________________________ than those around them.
Temperature - Warm lush areas support ____________ numbers or
populations with less _____________________ occurring. Cold harsh areas
support ___________________ numbers with _________________ coopetition.
Soil – Nutrient rich soils produces more ________________, nitrogen, and
phosphorus and support larger populations with _____________ coopetition.
Nutrient ___________ soils support smaller populations with __________
competition.
Water – Availability, ___________________. Temperature, saltiness, chemical
components (quality) all affect competition and ability to _______________ in
populations.
Changing conditions – drought, ____________, volcanic ________________,
and earthquake bring about changes that _______________ populations.
All biotic and abiotic factors are _______________________. If one factor is
changed it impacts the __________________ of other resources.