This week in the journal Nature Communications, scientists report a way to use fossilized shark teeth to figure out where different shark species, including megalodon, stood in the web of life. And last week in the journal Scientific...

This week in the journal Nature Communications, scientists report a way to use fossilized shark teeth to figure out where different shark species, including megalodon, stood in the web of life. And last week in the journal Scientific...

Explore food chains, food webs, energy pyramids, and the power of biodiversity in this ecology video by the Amoeba Sisters! This video also introduces general vocabulary for the unit of ecology.

Today we’re going to talk about the link between population and food energy. As the world's population keeps growing, finding ways to provide enough food and water for everyone while supporting a sustainable environment can be tricky! ...

Hank brings us to the next level of ecological study with ecosystem ecology, which looks at how energy, nutrients, and materials are getting shuffled around within an ecosystem (a collection of living and nonliving things interacting in...

Paul Andersen explains how ecosystems interact with biotic and abiotic factors. He explains and gives examples of food chains and food webs. He shows how limiting factors eventually leads to logistic growth. Real data from Yellowstone...

This video explain how energy is passed throughout an exosystem and the levels of organisms.

Pupil outcome: I can create and interpret pyramids of number to show the size of a population at each trophic level. Key learning points: - Food chains show the feeding relationships between organisms and the flow of energy through a...

This video is answering the question of what is a trophic level.

The position an organism occupies within a food chain.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...

Now that we know about nutrient cycling, we are ready to look at food webs as a whole. These represent feeding relationships within a community.These relationships designate certain trophic levels, so let's learn about what these mean...

This video covers:

- The idea that trophic levels are just the different levels of a food
chain
- Trophic level 1 are called the
producers
- Trophic level 2 are primary consumers, trophic level 3 are called the...

This video covers:

- The idea that biomass is just the mass of living organ
isms
- Pyramids of biomass show the amount of biomass at each trophic level of a
food chain
- Why the amount of biomass decreases as you...

Brit looks back on our second month on Nature League, when we explored the theme of biodiversity.

This video explores five fun facts about food webs.

This video is a lecture presentation on the transfer of biomass in food chains. The presenter explains how processes carried out by living organisms can affect the amounts of biomass and energy transferred from one trophic level to...

This live-action video program is about biomagnification. The program is designed to reinforce and support a student's comprehension and retention of the term through use of video footage, photographs, diagrams and colorful, animated...

This video is a lecture presentation on pyramids of biomass. The presenter explains the concept of biomass and trophic levels in a food chain. The video provides a graphical representation of the relative amounts of organic matter found...

The video discusses the important ecological concepts of trophic levels and biomass. The video provides an example of a food chain, from grass plants as producers to apex predators that have no predators of their own. The video explains...

The video is a lecture presentation on trophic levels in ecosystems. The presenter defines trophic levels as feeding levels in a community or ecosystem and explains how they can be used to organize feeding relationships. The concept of a...

Intensive farming is beneficial to humans as it increases the availability of food and therefore increases food security. It produces higher yields more efficiently so it can be sold at cheaper prices. However, it is controversial...

How do we find out the position that an organism occupies in a food chain? The different feeding positions in a food chain or web are called trophic levels. All food chains and webs have at least two trophic levels, starting at level one...

It explains the unidirectional flow of energy through different trophic levels; energy flow maintained by laws of thermodynamics, food web, food chain and the ten percent law.

In this De-Natured segment of Nature League, Brit breaks down a recent scientific journal article about the impact of biodiversity on extinction vulnerability in terms of trophic redundancy. Article citation: Dirk Sanders, Elisa...