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Jonah Breiter

on 8 January 2014

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Transcript of Lakes


By: Jonah Breiter
and Hannah Proehl

Lakes- Defined
Enclosed basin
- filled/partially filled with water
Producer - Bulrushes
Habitat: Marshes, shorelines, shallow waters


Appear statewide in most lakes


Reproductive Behavior: The seed heads break up and are blown to new locations by the wind

Primary Consumer-Zooplankton
Secondary Consumer-Yellow Perch
Decomposer - Sandy Laccaria
Energy Pyramid
Habitat- Found in lakes, ponds, and slow-moving rivers throughout Minnesota.
Population- Minnesota is full of perch, but the numbers are decreasing.
Reproductive Behavior- They spawn in early-may in the Southern lakes and mid-May in the northern lakes. The Eggs hatch after 2-3 weeks.
Nutrition- Perch are secondary consumers and heterotrophs, they eat minnows and the young of other fish, they also eat insects like mayflies.
Human Usefulness- Yellow Perch provide as a source of food.
Symbiotic Relationship- An example of parasitism is when an Anchor Worm burrows into a Yellow Perch, feeds, and leaves the fish skin red and inflamed (Minnesota Sea Grant).
Sensitivity to Environment- There are many Yellow Perch in Minnesota but the numbers are dropping because of overfishing (Minnesota DNR).
Habitat- Found in freshwater, ponds, streams and they drift on top of the water.
Population- There are numerous Zooplankton found in a healthy lake ecosystem.
Reproductive Behavior- They reproduce rapidly.
Nutrition- They are primary consumers, and are heterotrophs. They eat Phytoplankton and algae.
Sensitivity to Environment- When the Ph levels change it affects the Zooplankton's prey which affects their survival rate (MarineBio).
Human Usefulness- Zooplankton form the lower part of the food chain, insuring the organisms higher in the food chain are healthy which also includes humans (Wilkinson).
Symbiotic Relationship- An example of mutualism is Zooplankton eating all the algae which keeps the rest of the organisms healthy and the algae from getting out of control.
Food Web
Nutritional Requirements: Decomposes the remains of other energy levels to gain energy

Sensitivity to Environmental Insults: Pollution to sandy soil and deposits of nitrogen

Human Usefulness: Good for taking pictures and is edible

Symbiotic Relationship: Commensalism- The roots cross with neighboring plants causing no harm but producing more sandy Laccaria

Habitat: The shores of rivers and sandy lakes. Also post-glaciel sand plains

Population: Considered to be a special concerns species in Minnesota because they are so scarce

Reproductive Behavior: Via wind-borne spores and crossing roots with neighboring plants

Food Web Position: A heterotroph and decomposer
("Sandy Laccaria.")
("Sandy Laccaria.")
Food Web Position:


Nutritional Requirements:


Sensitivity to Enviromental Insults:

Human Usefulness:

Is the breeding ground and cover spot for popular

Symbiotic Relationship:

Commensalism- Largemouth bass use bulrush for nesting cover which causes no harm,_Ontario,_Canada_-_July_2010.
("How are lakes defined in Minnesota?")
All info from-
All info from-
All info from- (Minnesota DNR)
All info from- (MarineBio)
Full transcript