EES_Y3_LSN3

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

EES_Y3_LSN4

Evolution, Ecology & Sustainability

An exquisitely preserved in-ovo theropod dinosaur embryo sheds light on avian-like prehatching postures

Lesson 4 - the study of ecosystems

P. 314-321 

Keywords:

• ecology
• ecosystem
• habitat
• community
• population
• biosphere
• biotic factors
• abiotic factors
• ecological tolerance

Learning goals:

• I know how organisms interact with each other.
• I know what a ecosystem consists of.
• I know the difference between biotic and abiotic factors
• I can explain how biotic and abiotic factors influence population size
• I know the different organisation levels of biology
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The hierarchy of biological

 organization

molecule

cell

organel

organ

organsystem

tissue

population

organism

ecosystem

Biome

0

Ecology:  Study of ecosystems 

Ecosystem:  a biological community of interacting organisms and their physical environment.

Population: a group of individuals of the same species living in a particular habitat

Habitat: the non-living part of an ecosystem

Community: the living part of an ecosystem

Biome: a distinct geographical region with specific climate, vegetation, and animal life.

Keywords & defenitions

Which of the follllowing is not considered a part of a community

1. a group of platypuses
2. A population of fish
3. Rocks
4. A population of algae

Which level of organisatioin includes both living and nonliving components?

1. population
2. community
3. ecosystem
4. biome

Explain what is the difference between a population and a community?

Abiotic factors 

• water 
• temperature
• light
• air
• pH
• saltiness

Biotic factors 

e.g.

• predation (predator/prey)
• disease (parasites)
• grazers (herbivores/primary consumers)
• decomposers (breakdown decaying material)
• humans

competition (for light, space, water, food, etc.)

Tolerance curve

assignment classroom

1. Pick your favorite in the wild living organism/species:

2. determine in which ecosystem this organsim/species lives.

3. Find the ecological tolerance of this organism (eg. temp, salinity, water, sunlight, etc) online.

4. determine the adaptation the organsim/species has to fit the ecological tolerance.

5. Hand in yous assignment on classroom

Last minutes:

Draw this flamingo on the piece of paper and hand it in.