130x Filetype PPTX File size 1.19 MB Source: www.thelinkacademy.org.uk
Interdependence All species live in ecosystems composed of communities of animals, plants and other organisms that are dependent on each other and are adapted to particular conditions Plants need the nutrients from animal droppings and decay Plants produce food by photosynthesis Animals eat other Question: How are animals animals and plants dependent on each other within a community? Animals eat plants Animals pollinate Animals use plant and animals materials to build plants nests/shelters What affects animal populations? 1. What would happen to 2. How could changes in the number of prey an animal if the number of affect predator populations? predators increased? 4. A factory has been built next to the forest 3. How could disease affect how would this affect animals in the local population numbers? ecosystem? Task: Choose one and jot an answer down, you have 4 mins, one for each question Self-assessment: 1. If the number of predators increased, the animal population that is being predated would decrease in numbers. 2. If the number of prey increased, the number of predators would eventually also start to increase as there is more food available. If the numbers of prey decreased, the number of predators would decline due to lack of food sources. 3. If a disease was present within an animal population, the number of organisms would begin to decline. This would have a knock-on effect to other animal populations. 4. This could cause habitat fragmentation, meaning some populations of animals are split up and unable to mate. Habitat destruction could occur, meaning some organisms have lost their home. Overall, this would have a negative impact on animal populations in the local area. Food Webs Most animals eat more than just one type of organism, scientists can show this in a food web. Great White Shark Clown Fish Green Turtle Blue Clownfish Zooplankton Cleaner Shrimp Phytoplankton Food Webs Great White Sharks eat clown fish, what will happen to the number of clown fish if the sharks become vegetarian? Great White Shark Clown Fish Green Turtle Blue Clownfish Zooplankton Cleaner Shrimp Phytoplankton
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