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Let's now watch this video in full to understand the missing piece when considering ecosystems..
How does energy transfer through the ecosystem??
Energy transfer refers to food and eating...
where do all the biotic factors in an ecosystem gain their energy?
Complete the worksheet (8.03) below and glue in your books.
Start vid at 1.48 - 3.32
ECO 8.03 - understanding ecosystems
FOOD CHAINS
We all need energy to grown, move, reproduce, repair and stay warm. We eat food to give us the energy to do these processes.
But plants can not eat!
We know that plants make their own food for energy*
*What is this incredible, efficient,
self-serving process called? 🤔
A FOOD CHAIN shows us the feeding relationship
and the energy transfer between organisms.
It is both a food and an energy pathway.
Let's have a look at the image below to understand further.
foodchainandenergy.pdfECO 8.09 FOOD CHAIN IN STEPS
A SIMPLE FOOD CHAIN IS BELOW.
Follow the direction of the arrow to work out where the food (energy) goes!
The arrowhead goes into the mouth of the next organism..
Observe the scientific labels as you move
through the diagrams.
ECO 8.04 - A food chain illustrating the type of consumer
ECO 8.05 - A food chain illustrating the type of consumer and consumer classifications
ECO 8.06 - A food chain illustrating the type of consumer, consumer classifications, trophic levels
ECO 8.07 - A food chain illustrating the type of consumer, consumer classifications,
trophic levels and type of feeder
FOOD CHAINS---------> FOOD WEB
Interlinked food chains are known as food webs.
ECO 8.08 - AFRICAN FOOD WEB
Name a producer..
Name a primary consumer..
Name a secondary consumer..
Name a herbivore..
Is there an omnivore in this web?
Name any carnivores?
How many predators can you see?
Are there decomposers present?
What is the most complex food chain in the web?
ECO 8.09 - ENERGY PYRAMID
The energy pyramid denotes how energy flows
through the food web and ecosystem.
Only TEN PERCENT of ENERGY is passed on to the level above it!
ECOLOGICAL RELATIONSHIPS MAINTAIN BALANCE IN COMMUNITIES
Organisms in an ecosystem can have more complex relationships than just predator-prey. These relationships maintain the balance within the community. A change in the population of one species will impact on the population of other species.
Write and complete this table in your books and
use the internet to find examples of each relationship.
STORY TIME! THE WOLVES THAT CHANGED THE COURSE OF THE RIVER..
This story demonstrates how sensitive ecosystems are and how they are so intricately linked.
Have a go at building your own virtual ecosystem -
click on the game above !
class activity - pick one adaptation and write a paragraph summarising the video. Use scientific language. Submit for Thursday Homework?
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