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6.1 - Organisms and their environment
Ecology Unit 6
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Slide 1:
Diapositive
Biologie
Middelbare school
havo, vwo
Leerjaar 3
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Ecology Unit 6
Slide 1 - Diapositive
6.1 Organisms and their environment
You can classify the influences on organisms into biotic and abiotic factors.
You can describe the levels of ecology.
You can indicate the various feeding relationships in an ecosystem.
Slide 2 - Diapositive
Environment
Environment
: surroundings where an organism lives
Ecology
: Relationship between organisms and their environment
Biotic factors
: Influence that comes from living nature
Abiotic factors
: Non-living influences of nature
Slide 3 - Diapositive
Slide 4 - Vidéo
Levels of ecology
1.
Individual
: An organism Ex: effect of temp on 1 elephant
2.
Population
: Group of individuals of the same species in an area. Ex: influence of amount of rain on a population of elephants
3.
Community
: Populations of different species living together is an area. Ex: woodland: beech trees, ferns, earthworms, shrews (birds).
4.
Ecosystem
: Community and the biotope (abiotic factors) Woodland, pond, dunes, and meadows.
5.
Biosphere
: The part of the Earth where life is possible.
Slide 5 - Diapositive
Slide 6 - Vidéo
Food chain
Food chain: algae water flea perch pike
Slide 7 - Diapositive
Food web
-When food chains are interrelated
-form a network
-consists of living organisms
-producers, herbivores and carnivores
Slide 8 - Diapositive
Example: Marine food web
Slide 9 - Diapositive
Biomass
Organisms are composed of energy: carbohydrates(, proteins (15%) and fats (20%) =
biomass
Biomass
is contained in each level of a food chain.
Biomass decreases at each level of the food chain.
Energy is lost as heat and waste.
Slide 10 - Diapositive
Accumulation
Plants take up substance from their environment (CO2, minerals)
Also toxic substance - heavy metals
Ex. cadmium, mercury, lead, arsenic and tin
Animals eat the plants
Toxins get stored in fatty tissue of animals.
Build up in the animals at the end of the food chain = accumulation
Slide 11 - Diapositive
What did we learn?
Abiotic vs. biotic factors
Levels of ecology
Food chain vs. food web
Biomass and accumulation
Slide 12 - Diapositive
To Do?
Read 6.1
make 6.1
Slide 13 - Diapositive
What level of ecology would you put all the organisms in a woodland?
A
Ecosystem
B
Community
C
Population
D
Individual
Slide 14 - Quiz
Which example describes a population?
A
All rabbits on Schiermonnikoog
B
The plants in a forest
C
All organisms in a pond
D
A lioness with her 2 cups in the savannah
Slide 15 - Quiz
What is a population?
A
An organism
B
a group of organisms of the same species, who reproduce together
C
All organisms in an area
D
All biotic and abiotic factors in an area
Slide 16 - Quiz
Pesticides and herbicides eventually show up in higher level consumers due to
A
climate change
B
accumulation
C
habitat destruction
D
soil erosion
Slide 17 - Quiz
Why is accumulation dangerous?
A
because animals eat more than they can digest
B
because plants can't do any photosynthesis
C
because in the top of a food pyramid chemicals built up to lethal levels
D
it causes an increase of biomass at each level of the food pyramid
Slide 18 - Quiz
Slide 19 - Question de remorquage
Biotic factors
Abiotic factors
Slide 20 - Question de remorquage
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