00:01
A little hierarchy for ecosystem.
00:04
So the question asks you to match the description with each level.
00:08
So let's look at each one of it.
00:12
All living things on earth are sustained by interconnected global system.
00:17
So this is the highest level we called biosphere.
00:21
So this is all our interconnected global system.
00:39
The global system indicate it's on the biosphere level, which is the highest level, which is interaction between different ecosystems.
00:56
Second, cheetah and gaziel interact in a predator and prey.
01:09
So the predator and prey relationship is at the community level.
01:19
The community means that the population interact with each other.
01:30
Or we always call this interaction between different species.
01:54
The third one, a forest in the eastern u .s.
01:57
Contain trees, ferns, bears, robins, soil microbes, and many other kinds of organisms, as well as water, air, sunlight, nutrients upon which these organisms depend.
02:10
So you can see this is the, i don't want to copy the entire thing, but this basically is the organism interact with natural environment, which is non -living.
02:41
So this kind of interaction is what we call it at the ecosystem level.
02:49
It's the living thing interact with, this is over the community level where the entire living organism in that area interact with their environment, which is non -living elements.
03:04
This is called ecosystem level.
03:08
The next one, a single tadpole grows become a frog.
03:11
This will be an organism level.
03:14
So because you have a tadpole that grow into a frog, it's a single organism.
03:31
So if you want to use the hierarchy, this is going to be a individual.
03:40
It's one organism.
03:43
The next one, we called an estuary and the organism that live within it are affected by inputs of freshwater, sediment, and nutrients from the river that flows into it, as well as by the tides and current of the marine environment offshore.
04:02
Again, this is the organism affected by the environment, marine environment, offshore.
04:30
So this fits our description of ecosystem, which means that the organism interact with their non -living environment, physical environment.
04:47
Number six, a colony of penguin lives on a island.
04:53
So penguin, it's a colony, which means it's a group as a population.
05:13
So this basically are what we'll talk about the population.
05:17
So this describe a population of penguins interact with each other...