Artificial Eutrophication
what is the definition of artificial eutrophication?
when excess nutrients get into water.
what is seaweed?
not a plant; type of protist
also called algae
has no roots;floats
The cause of fish die is that there is less oxygen.
What is nitrogen?
The chemicals we use and produce on land end up in the water.
How does seagrass provide oxygen?
a product of photosynthesis
What is the end result of artificial eutrophication?
The end result is a destroyed ecosystem
what is seagrass?
Seagrass are angiosperms which are flowering plants. Has roots; grows on floor of bay. These plants spend their entire life cycle underwater and are sometimes called submerged aquatic vegetation. Are a keystone species in the bay.
What is the effect of sunlight decreasing?
Seagrass is die and decreasing.
What are 3 sources of nitrogen?
Farm animal feces; Farm fertilizers; Transportation exhaust; Lawn fertilizers; Factory discharge
Is seagrass a benefit to the ecosystem?
Seagrass are a keystone species in the bay.
how do the abiotic factors change?
sunlight:
oxygen:
temperature:
turbidity:
Sunlight: decrease
Oxygen: decrease
Temperature: decrease
Turbidity: increase
What are some differences between Seagrass and Seaweed?
Seaweed is on the water surface and floats around loosely. While seagrass is at the bottom surface of the water and attached to the sea ground.
What is the effect of lack of seagrass?
Erosion and flooding is more likely
Is nitrogen the most common nutrient?
Yes
How does seagrass provides a calm environment?
absorbs wave energy, reduces erosion and turbidity
How do the biotic factors change:
Algae, Bacteria, Seagrass,Fish, and People (recreational & homes)
Algae: increase
Bacteria: increase
Seagrass: decrease
Fish: decrease
People (recreational & homes): decrease
How are depth and light related?
As depth increases, the amount of light decrease, causing the grass to grow less.
What is the cause of the decrease in oxygen?
Increase in bacteria
True or False: Is nitrogen a nutrient?
True
How does seagrass provide food?
Some organisms eat live seagrass and some eat dead/broken down seagrass called detritus
What are the steps of artificial eutrophication?
Rain and runoff wash the excess nitrogen to the water
The algae bloom blocks the sunlight.
Bacteria decompose the dead algae.
increase in bacteria.
Bacteria use up the oxygen in the water.
Without oxygen in the water the fish die
Without sunlight the seagrass die
Without the seagrass erosion and flooding is more likely
Tourism and home buying decrease because the bay looks ugly due to dead fish and turbid water
What might be the consequences to the Bay ecosystem if the seagrass beds were damaged?
A) Habitats & nursing grounds can be destroyed, there would be no food for organisms, oxygen would be low and erosion & turbidity would be high.
B) Decreased fish and bird populations because of decrease in shelter, food and oxygen. Increase in flooding because of erosion. Bay will look bad because of the increase in turbidity.
what is the effect of the increase in algae?
Increase of bacteria
How can nitrogen destroy the ecosystem?
Rain and runoff wash the excess nitrogen to the water and since nitrogen is a nutrient, excess nutrient is bad.
What are some benefits of Seagrass?
Provides a habitat
nursing ground
Provides food
Provides oxygen
Provides a calm environment