Bs 1 + 2 + 9

Bs 1: What is Ecology?
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This lesson contains 13 slides, with text slides and 1 video.

time-iconLesson duration is: 45 min

Items in this lesson

Bs 1: What is Ecology?

Slide 1 - Slide

unit 6 Ecology and Sustainability 

Slide 2 - Slide

What is Ecology?
= The part of Biology concerning the relationships between organisms and their environment. 

Slide 3 - Slide

biotic and abiotic factors
Environmental influences categorized into two groups:

  • Biotic:
Influences from living nature (other organisms)
  • Abiotic:
Influences that come from non-living aspects of nature. 
All the abiotic factors together in an area is called a biotope.

Slide 4 - Slide

The levels of Ecology
You can investigate:
1. The relation between an individual and its environment.
2. A population is a group of individuals of the same species in a specific area. 
3. Populations of different species in the same area -> community.
4. An ecosystem: a specific area in which biotic and abiotic factors form a unit. 

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Feeding relationships within an ecosystem
  • Herbivores (plant eaters)

  • Omnivores (eat plants + meat)

  • Carnivores (eat meat)

The animals in the picture they eat each other.. they form a food chain.

Slide 6 - Slide

Food chains and food webs
A food chain is a series of organisms in which each organism is the food source for the next.

First link = plant species. 
Second link = herbivore.
Third link = carnivore. 

Ecosystems contain multiple food chains that are interrelated. They make up a network -> food web. 

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Plants provide the food for other animals, they are producers (first link)

Animals eat (consume) the plants. They are consumers
Producers -> primary consumers -> secondary consumers etc. 

Not all plants and animals get eaten.. they can also simply die. Scavengers will use remains. 

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The remains left by the scavengers are broken down by fungi and bacteria -> decomposers

Decomposers convert remains into Carbon dioxide, minerals and water. These substances can be used again by plants. 
Think of photosynthesis:
Water + light + CO2 -> Glucose + O2

<- nutrient cycle. 

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Some organisms don't need other organisms as food. Some organisms can make their own food. We call them autotroph. Auto (=self), trophein (=feeding)

Some organisms do feed on others. We call them heterotroph. Heteros (=others), trophies (=feeding)

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Slide 11 - Video

the Plastic challenge
you are going to keep track of how much plastic you use in a week. (5 days is enough) 

this can be made in a collage or a photo report

in magister 

Slide 12 - Slide

Now get to work!
Basic 1
Make exercise: 1,2,3,4 

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