taxonomy, biology, genetic variability and medical importance of ochlerotatus caspius
Biology M1 The Importance of environment
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Author: Janice HoLung Note: Unless otherwise stated, photos and diagrams were provided by the author, and Sonia McCulloch and by Lucy Marolyn Gentles.
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Transcript of Biology M1 The Importance of environment
Author: Janice HoLungNote: Unless otherwise stated, photos and diagrams were provided by the author, and Sonia McCulloch
and by Lucy Marolyn Gentles.
Author: Janice HoLungNote: Unless otherwise stated, photos and diagrams were provided by the author, and Sonia McCulloch
and by Lucy Marolyn Gentles.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
INTRODUCTION
In this presentation, you will learn more about the environment and habitats as well understand how greatly all living things depend on their physical environment.
Many more interactions occur between the living things and their physical environment, and each one (living things & the environment) affects the other.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
OBJECTIVES
After viewing this presentation and doing the activities: 1.You will be able to distinguish between the following pairs of terms:
Physical and biotic factorsEnvironment and habitatPopulation and community
2.You will be able to discuss the importance of the physical environment to living organisms.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
REVIEW TIME NOW !
Environment and habitat: Do you remember what each of these means? (Yes, the environment is everything around the organism, while the habitat is the home of an organism)
Population and community. Do you remember these? (Yes! Population is the total number of organisms of ONE species in an area, while the community is the number of ALL the different species that are in the area.)
You are going on very well, so far !! Keep it up !!
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
What is the picture on the right showing?
A population of ducks near a pond
Check
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
LOOK AT THE PHOTO
Which of those terms you were reviewing is shown in the picture below?
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
WHICH TERM DOES THAT PICTURE ILLUSTRATE?
If you said “community” you were correct, because it is a group of different organisms living in the same area.
However, you could have also said “habitat”, because it is illustrating the home of the corals and the small fish.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
WHAT DOES THESE PHOTOS SHOW YOU?
Make a list of the living components in both pictures. Next, make a list of the non-living components.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
LOOK AT THE PHOTOS AGAIN
Did you notice that there were many living components?
Now, change the word ‘living’ to ‘biotic’, and change ‘non-living’ to ‘abiotic’. Physical is another word for ‘abiotic’.
These words – biotic and abiotic are the words biologists use to describe the two sets of components or factors of any habitat.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
OBSERVING OTHER HABITATS
Have a look at some other habitats. See if you can discover information about them. What are the different factors or components that are in each one?Look at the following slides of other habitats
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
SOURCE: http://www.noaanews.noaa.gov/stories2005/images/reef-floridakeys.jpg
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
DO SOME RESEARCH!
Try to discover information about each of those five habitats. Put the information in two categories: the biotic components and the abiotic/physical components.
How do the different abiotic components affect the biotic components in each habitat?
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
SOIL
You are now going to examine more closely, SOIL, an important physical or abiotic component of the environment.
You have just completed the activity on some characteristics of two different soils.
Did you notice that their texture and colour are quite different?
When you poured the water through them, did you notice that once it all settled, each soil type had different layers of different widths?
Did this have anything to do with their characteristics?
Look at the photos on the next two slides.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
WHAT DID YOU NOTICE?
Did you notice that the first soil photo was made up of very fine particles? It looked like fine sand.
Did you notice that in the second picture, there were two different types of soil? There was at the top soil that looked like crushed limestone, and at the bottom it looked like a gravel and sand mixture.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
CHECK IF YOU WERE CORRECT !
The first soil photo displayed fine sand…..it came from our North Coast ! Fine sand is a type of soil !The second picture was taken at the Palisadoes, where work is being done to protect the roadway from storm surges. Therefore, there is gravel and marl (crushed limestone) deposited on the roadside. Did you notice that plants have begun to grow on this ‘soil’?
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
OTHER KINDS OF SOIL
Did you notice that these soils were differently coloured?What else did you notice about them?One was from the hills. You might have noticed the red coloured soil.The other was from the flat lands. What colour was it?
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
HOW IMPORTANT IS SOIL TO LIVING THINGS?
Not all living organisms need soil to live. However, a very large number do need it, because not only do they obtain special nutrients from it, but they need the air inside the soil for breathing, and they need the water inside the soil for all their body functions.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
STRUCTURE OF SOIL
Take a careful look at the in Figure 1.
Figure 1 Diagram showing the arrangement of particles, air and water in soil.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
WHAT DID YOU NOTICE?
Did you notice that there were several components in the diagram?
Can you think of what each component is used for in living organisms?
Do some research to discover what kinds of organisms live inside the soil, and what components of the soil each one needs most in order to live a healthy life.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
AIR
Air is another abiotic component in habitats. How important is AIR to living things?
What would you do if there were no air to breathe? Many organisms were specially adapted to live on dry land, where there is plentiful air to breathe. They need the oxygen in the air for respiration, and they need the nitrogen in the air (after it has been changed to nitrates) to make protein.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
AIR
But, what about organisms that live inside water? These organisms living in water, such as rivers,
lakes and the seas, also need air, or need the components in air.
Why? Because all living things need oxygen and nitrogen, which come from air.
There is a lot of these gases in air dissolved in water of all kinds. One only has to watch a beaker of water being boiled to notice how many air bubbles come out of it, when it is heated up.
Therefore, the organisms in water do get their gases from dissolved air in the water.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
OTHER ABIOTIC FACTORS
What other physical or abiotic components are important?
Already listed are air, water, and soil. Consider this – would we be comfortable living
in areas that are constantly extremely cold or extremely hot? Humans are not adapted to living in such climates, although there are other living things that are adapted and live successfully in these conditions. Think of penguins ! Think of camels !
Therefore, another abiotic component of the habitat is temperature.
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
ABIOTIC COMPONENTS OR FACTORS
. Think of the most important factor to
nearly all living things – isn’t it LIGHT? If there were no light, there would be no plants, and since animals depend on plants for food, there would be no animals !
Now list two other abiotic components that are important to living organisms
IMPORTANCE OF THE PHYSICAL ENVIRONMENT
SUMMARY
Components in a habitat or an organisms surroundings (their environment) may be divided into two kinds: biotic (living things) and abiotic (non-living factors).
Abiotic components or factors affect the biotic components very much.
There are different kinds of abiotic components: air, water, light, climate and soil.
Each abiotic component has a different use or effect on the biotic components (the living things)
Hope that you remembered these important facts!
