All UK Exam Boards included

Ecosystems

Download Topic

What is a population? A population is all the individual organisms found in a given habitat, of one species. So you could talk about a population of wolves in the woods. If you want to talk about the wolves and rabbits in the woods, then you’d be referring to a community. A community is made up of the various populations in a habitat. So the summation of all the living things in a given area is called a community. What then is an ecosystem?

 

An ecosystem comprises the community of living organisms in a habitat, together with all the non-living components such as water, soil, temperature, etc. called abiotic factors.

 

Why are different organisms of different species able to coexist in the same habitat? How come they don’t directly compete with one another and drive others out? Have a watch…

 

 

So that’s the last and loveliest new term: niche. It rhymes with quiche. A niche is the interaction, or way of life, of a species, population or individual in relation to all others within an ecosystem. It’s how it behaves, what it eats, how it reproduces, where it sleeps, etc.; a species’ niche is determined by both biotic factors (such as competition and predation) and abiotic factors.

 

Where do we get all our energy from? Food. Where does the energy in food ultimately come from? Plants. Where does the energy in plants ultimately come from? Nowhere, they make it themselves through photosynthesis.

 

So is all the energy available to all living things on Earth down to photosynthesis? It sure is, my biologist friend, it sure is. Let’s take a humbling moment of meditation while adoring this photo of a plant:

 

 

One day that weird-looking thing in the middle will be a pineapple ^_^

 

 

 

 

Sorry! There are no posts.

Sorry! There are no posts.

Your Reviews

Thank you!! Your site is so helpful!

studyaspect YouTube

I’ve struggled so much with feeling overwhelmed with biology revision, and I don’t know where to start. But your website is just what I need! It tells me all the information I need, and the knowledge I need to then build on, and it’s written in a way that soaks straight up into my brain!

Prettyhetty The Student Room

Just a huge thank you for spending your time helping others. I love your site and I'm seriously very grateful. No word of a lie

Neuron13 The Student Room

Thank you for making all the content btw!

Serena Kutty YouTube

wow just checked out your website and think it’s pretty cool.

Eager bug The Student Room