CB9 Year 10 - Ecosystems And Material Cycles Flashcards
What is an individual
A single organism
What is a population
All the organisms of one species in a habitat
What is a community
All the organisms of different spices living in a habitat
What is interdependence
Organisms that depend on each other for vital resources such as food shelter and safety
What are the two types of interdependent relationships
Mutualism and parasites
What is a mutualism relationship
A relationship between two organisms where both organisms benefit
What is a parasitic relationship
Where a parasite benefits off of the relationship with a host but the host doesn’t benefit
Give an example of a mutualist relationship
Bees spread pollon in flowers with allows them to reproduce and bees get nectar which is their food
Give an example of a pasitic relationship
Fleas which feed off of the blood of mammals such as dogs providing them with food and taking away the dogs blood
What is a biotic factor
A living factor
What is an abiotic factor
A non living factor
Give two examples of abiotic factors
Temperature
Amount of water
Give two examples of biotic factors
Competition
Predation
What is an eco system
All the organisms and the environment in which they live
What is a quadrat used for
Comparing how common an organism is in two sample areas
Why does the quardinates to the placement of a quadrat have to be random
So there is no human biast
What are the 5 steps to using a quadrat
Place the quadrat on a random point in your first sample area
Count all of the selected organisms
Do this multiple times to get a table of data
Do the same with the second sample area
Find the mean results and compare them
How do you find the estimated number of organisms in an area
Work out the mean number of organisms per metre saquared
Multiply the mean per metre squared by the total area
What are the two methods of studying distribution
Belt transept
Quadrat
What are belt transept used for
Finding the distribution along a gradient
What is biodiversity
The variety of living organisms in an ecosystem
How can human activities reduce biodiversity in the form of fertilisers
Fertilisers can leach into water causing algae to grow, this will block sunlight from below aquatic plants preventing them from photosynthesis. This will kill these plants which will inturn kill the fish because the plants were making them oxygen.
How can fish farms reduce biodiversity
Predators of the fish caught in the nets can approach causing them to also get stuck in the nets
How can non indigenous species reduce biodiversity
Non indigenous species can compete with indigenous species for resources such as food water and shelter
