Water Chemistry
Vocabulary
Ecosystem Interactions
Ecosystem Dynamics
Abiotic or Biotic
100
Measures the amount of oxygen in the water
Dissolved Oxygen
100
LOTS of a resource
Abundance
100
Describe a PREDATORY relationship.
Polar bear eats leopard seal
Orca eats penguin.
Whale eats krill + plankton.
Krill eat plankton.
100
What happens to resource availability (ex: food) if a predator enters the ecosystem?
Resources INCREASE because less organisms using resources
100
Living factors in an ecosystem
Biotic factors
200
Measures how acidic or basic a substance is.
pH
200
Lacking resources
Scarce
200
Describe a PREDATORY relationship. 
Golden eagle eats ptarmigan.
Golden eagle eats snowshoe hare.
200
What happens to POPULATION when resources are scarce?
Population DECREASES (not enough resources to sustain population)
200
Non-living factors in an ecosystem
Abiotic factors
300
This substance is important because organisms use it to build DNA and proteins
Nitrogen-Nitrate
300
A group of different species populations that live and interact in the same geographic area at the same time.
Community
300
Identify a PREDATORY relationship. 
Hawk eats snake.
Hawk eats mouse.
Hawk eats rabbit.
Frog eats grasshopper.
Bird eats grasshopper.
300
What happens to POPULATION when resources are abundant?
Populations INCREASE (enough resources for population to grow)
300
Abiotic or biotic?
SUNLIGHT
Abiotic
400
Measures the amount of carbonates in the water. Carbonates help water keep a stable pH.
Alkalinity
400
A species is a basic group of living organisms that share similar traits and can breed together to produce fertile offspring.
Species
400
What is the relationship between WHALE and KRILL?
Competitive (both eat plankton)
Predatory (whale eats krill)
400
What happens to population if a VIRUS comes in and kills a large amount of a population?
That population DECREASES, but resources INCREASE (b/c less use of resource)
400
Abiotic or biotic?
PLANTS + ANIMALS
Biotic
500
Measures the amount of calcium and magnesium in the water. This protects organisms' gills from harmful substances like mercury, lead or cadmium.
Hardness
500
Any variable or resource in an ecosystem that slows or stops a process or the growth of a population.
Limiting Factor
500
Based on this graph, what trend is being shown?
As predator population INCREASES, prey population DECREASES.
500
Give one explanation for what caused the change in deer population in 1924-1925.
Population declined because of..
- virus
- drought / famine
- predator increase
500
Abiotic or biotic?
DEAD ANIMALS + BONES
Biotic