00:01
We need to define these levels of organisation.
00:04
So this is ecology, and the lowest level we have here is the individual.
00:13
So an individual is just a single organism, which could be a single cell like a bacterium, or it could be something more complicated like a tree or a human.
00:24
So just a single individual.
00:27
The next level up is population.
00:31
So population is a collection of individuals of the same species.
00:37
So it's multiple individuals of the same species.
00:49
And they're living in the same area.
00:54
The next level up is the community.
00:58
So the community is a collection of populations.
01:04
So instead of looking at a single species, if you're looking at a community, you are looking at the individuals of multiple species in an area.
01:14
So the community is all of the living things in the area.
01:19
Next, there's the ecosystem.
01:22
So up to this, we've only been looking at living things.
01:25
The ecosystem is the community plus abiotic factors.
01:35
So if you're looking at the community, you're just looking at all of the living things in the area.
01:40
If you're looking at the ecosystem, you're looking at them, but you're also looking at the type of soil, the rainfall, the temperature, all of these abiotic factors of this area.
01:52
A biome is much broader.
01:58
It's a particular type of habitat that you can find across the world that has particular characteristics.
02:05
So it's characterised by things like the level of rainfall, the temperature and the dominant vegetation.
02:12
So it's a type of environment with particular characteristics.
02:30
So some examples there would be a desert...