1. Interactions Among Living Things Copy what is highlighted!

2. PART 1 1. Adapting to the Environment
Natural Selection – a characteristic that makes an individual better suited to its environment may eventually become common in that species.
Natural selection results in adaptations or behaviors and physical characteristics that allow organisms to live successfully in their environments.
(you will hear more about this during Evolution)

3. 2. CHANGES IN POPULATION SIZES
BIRTHS VS DEATHS
Birth rate> death rate= increase in population
Death rate > birth rate= decrease
in population
IMMIGRATION VS EMIGRATION
immigration- moving into a population
emigration- leaving a population
POPULATION DENSITY- the number of individuals in an area of a specific size.
Population Density=
Number of individuals
Unit Area

4. Immigration vs. Emigration
Moving INTO a population
Birds immigrate to the south for the winter.
Emigration
LEAVING a population
Birds emigrate from Canada for the winter.

5. 4. Carrying capacity usually refers to the population level that can be supported for an organism, given the quantity of food, habitat, water and other life infrastructure present.
Carrying capacity is thus
the number of individuals
an environment can support
without significant negative
impacts to the given organism
and its environment.

6. 5. A limiting factor is one that controls a process, such as organism growth or species population size or distribution. The availability of food, predation pressure, or availability of shelter are examples of factors that could be limiting for a species population in a specific area.

8. 6. DIVERSITY
is the presence of a wide range of VARIATION (differences) in the qualities or attributes under discussion 8

9. 7. Biodiversity
is the genetic diversity, species diversity and ecological diversity that are so important to life on this planet. It is the result of adaptations that have evolved over billions of years due to environmental changes in the Earth’s past. 9

10. 8. Interactions Among Living Things
Organisms have adaptations that help them survive in their environment
All organisms have their own Niche.
Niche is the role of an organism in its environment or how it makes its living.
NICHE INCLUDES:
type of food the organisms eats
how it obtains this food
which other organisms use this organism as food
when and how it reproduces
physical conditions it requires to survive
What is YOUR niche? _________& _________

11. Agenda
Warm up- vocabulary sheet #23-31 (if you have completed those review them and work ahead)
Work session: notes PART 1

12. 10/20/16 Science
Agenda
Warm up- 10 minutes: work on any remaining vocabulary
All 3 sheets will be due on your NBI day next week. (3rd Tu, 4th Wed, 5th Th, 6th Fri)
Classwork- notes part 2

13. 9.(part 1) Three types of Interactions among Organisms
Competition
Predation
Symbiosis

14. 9 (part 2) & 10. Competition
It is the struggle between organisms as they attempt to use the same limited resource
Occurs when two species occupy
the same niche
Why can’t two species occupy the same niche?
If two species occupy the same niche, they will compete directly against each other and one species will eventually die off

15. In Austrilia, Rabbits compete with herbivores like the western Quoll which became extinct
Rabbits were brought in; they were an invasive species whose destruction of habitats is responsible for the extinction or major decline of many native animals such as the Western Quoll.

16. 11. Predation
The interaction in which one organism kills another for food is called predation

17. Predation
Questions:
What variable is plotted along the x-axis? What variable is plotted along the y-axis? Year; number of wolves/moose.
How did the moose population change between 1965 and 1972? What happened to the wolf population from 1970 through 1978? The moose population increased and then decreased; the wolf population increased.
How might the change in the moose population have led to the change in the wolf population? As the moose population increased, more food was available to the wolf population and it increased.
What is one likely cause of the dip in the moose population between 1974 and 1981? The wolf population increased.
How might a disease in the wolf population one year affect the moose population the next year? Disease would cause a decrease in the wolf population, so fewer moose would be eaten and the population could increase.

18. PREDATOR/PREY
Predator- organisms that obtain their nutritional energy by killing and eating other organisms.
Prey – Any creature that is hunted and caught to be eaten for food.

19. 12. Adaptations Predator adaptations Prey adaptations
Help them catch and kill prey
Cheetah can run very fast for a short time
Jellyfish’s tentacles contain a poisonous substance that paralyze tiny water animals
Prey adaptations
Help them avoid becoming prey
Alertness and speed of an antelope help protect it from its predators
Smelly spray of a skunk

20. 13. Defense Strategies Protective Covering Warning Coloring
Mimicry
False Coloring
Protective Covering
Warning Coloring
Camouflage

21. 14. COMPETITION
The simultaneous demand by two or more organisms for limited environmental resources, such as nutrients, living space, or light.
Example

22. 15. Symbiosis
A relationship among organisms where at least one organism benefits.
Organisms within a community interact with each other in many ways. Some are predators, some are prey. Some compete with one another, some cooperate. Some species form symbiotic relationships with other species:
Mutualism
benefits both
Commensalism
benefits one, other unaffected
Parasitism
benefits one, harms other

23. 16. SYMBIOTIC RELATIONSHIPS
MUTUALISM-An association between organisms of two different species
in which each member benefits.
EXAMPLE
Example: Rainforest ants and the Whistling Thorn and Bullhorn Acacia trees.
ants nest inside the plant's thorns.
ants protect acacias from attack by herbivores (which they frequently eat, introducing a resource component to this service-service relationship)

24. 17. Commensalism- the relation between two different kinds of organisms when one receives benefits from the other without affecting or damaging it.
Barnacles adhering to the skin of a whale or shell of a mollusk: barnacle is a mollusks that benefits by finding a habitat where nutrients are available. (In the case of lodging on the living organism, the barnacle is transported to new sources of food.)
The presence of barnacle populations does not appear to hamper or enhance the survival of the animals carrying them.

26. 18. PARASITISM Ticks on a bird
symbiosis in which one organism lives as a parasite in or on another organism and usually does some harm to it.
Hosts is the
organism that the
parasite lives on
Ticks on
a bird

27. On a ½ sheet of paper Make a 3 flap foldable
On the flap label: 1. competition
2. predation
3. symbiosis
-under the flap: re-word the definition
-sketch an example or draw: emojis to help you remember what the word means
This is your ticket-out-the-door

28. 10/21/16 Science
Agenda:
Warm up- wrap up “Interactions of Org” notes from yesterday
Work session – video with handout

29. PART Changes in Communities Ecological Succesion is the process of change in the species structure of an ecological community over time. The time scale can be decades (for example, after a wildfire), or even millions of years after a mass extinction.

30. 20. Types of Succession Secondary Primary After a “blowout”
Re-establish a community
Already had living organisms
Fire, flood, human disruption
Primary
1st time plants
or animals are
established
New island
Volcanoes
Bare soil, rock

31. Ecosystems are always changing…
Primary Succession – a series of changes that occur in an area where no soil or organisms exist.
In a barren area, a primary community is established with pioneer species (first species in the area), lichens (algae and fungi)like mosses, that do well with little or no soil. Mosses eventually give way to coniferous trees.

32. Ecosystems are always changing…
22. Secondary Succession – a series of changes that occur in an area where the ecosystem has been disturbed.
When a disturbance (fire, flood, or tornados) damages a community but soil remains, the community gets reestablished from seeds and roots left behind. Grasses grow, then small shrubs, and eventually trees.

33. Succession communities:
2. Intermediate
species
3. Climax
community
Pioneer
species

34. 21. Primary Community Pioneer species:
Are the first plants to grow in an area
Lichens (algae & fungi) break apart rock to make soil
Grasses
Annual flowers
Mosses

35. 22. Intermediate Community
Is characterized by trees that grow fairly fast like pine trees that needs lots of sun.

36. Plant community that no longer undergoes changes in species composition due to succession.   Hard woods like oak & maple trees
23. CLIMAX COMMUNITY

37. World Population video