Ecology
The study of how organisms interact with each other and the environment.
Ecology
List 4 abiotic factors
Water, temperature, soil, fire, light, gas levels
List 2 biotic factors in a grasshoppers environment
Predation by birds
Grass
A mate
What does an arrow show in a food web?
The arrows represent the movement/flow of energy from one organism to another when consumed
List 3 ways ecosystems are impacted by humans
Introduced species, habitat destruction, Agriculture
All the factors in an organism's surroundings that affect it
The environment
Why did Australian Aboriginal communities use fire to improve plant growth?
Some plants will flower better after fire and germinate, some require fire to open seed pods
What is symbiosis?
Close, physical long-term relationship between two organisms of a different species
What are producers?
They produce their own food materials, everything else must eat producers or eat something that has eaten a producer to gain energy
List 2 benefits of fire on an ecosystem
Plant reproduction - open seed cases
Plant growth - eucalyptus produce fresh shoots after fire, food for herbivores
Nutrient-rich soil top
What is the environment, ecosystem and habitat of a dolphin
Environment: The Pacific Ocean.
Ecosystem: Great Barrier Reef
Habitat: Coral sections / bays
The biosphere consists of Atmosphere, ______ and ________
Atmosphere, Hydrosphere and Lithosphere
What is the relationship called when one organism benefits and the other is unaffected?
Commensalism (+/o)
Give an example of a food chain with four trophic levels
producer - primary consumer - secondary consumer - tertiary consumer (Apex)
Why is biodiversity important for an ecosystem?
Organisms with high biodiversity are less likely to be disrupted by environmental changes
What are the two main components of an ecosystem?
1. Living (biotic)
2. Non-living (biotic factors)
What is the word equation for photosynthesis?
sunlight
carbon dioxide + water ------> glucose + oxygen
chlorophyll
Give an example of Parasitism
Tapeworm
Fleas
Bot fly
grass - snail - frog - tarantula. Which is the second-order consumer in this food web
frog
Using an example explain the impact of an introduced species.
Cane toads, rabbits, cats, foxes etc.
Compete for resources, breed quickly, eat native species, destroy habitats
A habitat consists of....
A certain area of an ecosystem
What is the word equation of cellular respiration?
Glucose + Oxygen -->Water + Carbon dioxide + ATP
Describe the relationship between a predator and its prey
more prey available = more predators have food to survive and reproduce.
prey decreases = predators decrease, as their food runs out
Why are wetlands and forests important?
Wetlands and forests help to clean water.
List 2 negative impacts of floods on ecosystems.
Increased erosion
Increased water levels (food sources drowned)
Decreased nutrients in soil
Decreased biodiversity