Webs, Chains, and Pyramids
Ecosystem Interactions
Biogeochemical cycles
100
What is this?
A food web
100
What are the 3 main types of ecosystem interactions? (Big labels)
Competition
Predator/prey
Symbiosis
100
What are the two biogeochemical cycles we studied in class?
Water cycle and carbon cycle
200
What do the arrows show and are they pointing the right way?
The movement (or flow) of energy
No ... no they are not they need to point toward the organism that is doing the eating
200
What are the three different types of symbiosis (names only)
Mutualism
Commensalism
Parasitism
200
When water goes from a liquid to a gas this is known as ______ation
Evaporation
300
Use this food web to create a food chain of at least 4 trophic levels
Answers will vary but here are some that students may say
Grass -> Grasshopper -> mouse -> (fox, owl, hawk)
Tree -> Caterpillar -> bird -> owl
Tree -> deer -> mosquito -> spider
300
For each of the symbiosis types say what they are and give the signs on who wins/loses
Mutualism (+,+)
Commensalism (+,0)
Parasitism (+,-)
300
When water goes from a gas to a liquid this is _____ation
Condensation
400
Name a producer in this food web
Grass or tree
400
What are the two types of competition?
Intraspecific & Interspecific
400
When it the liquid in clouds becomes so condensed it rains, snows, etc. this is ____ation
Precipitation
500
Create an energy pyramid and make it 5 trophic levels. Give me a realistic example in each level.
500
The pom pom crab uses two anemones to fight would be predators. The anemones get better access to food. This is an example of _____ because _____ 
Mutualism both the anemones and the crab both benefit
500
Label the diagram using the key terms ending in "ation"
1 = Condensation
2 = Precipitation
3 = Transpiration
4 = Evaporation
600
How much energy is lost as you go up 1 trophic level? and how much goes up to the next level
90% is lost
10% goes up to the next level
600
False cleaner fish mimic the coloration and pattern of cleaner fish (which clean parasites off of larger fish and get a free meal, while cleaning larger fish of parasites). Instead the false cleaner fish takes a bite of the larger fish and swims away why?
Parasitism one benefits at the others expense
600
Plants take in CO2 from the atmosphere during what process?
Photosynthesis
700
Assuming the middle level of a 5 level trophic pyramid has 1,000 units of energy fill out the other levels with how much energy they each have
Bottom = 100,000 then 10,000 then 1,000, then 100 then 10 at the apex
700
This bird built a nest in a tree what relationship is this and what organisms are involved? why?
Commensalism between bird and tree
The bird benefits and the tree is neither harmed nor helped
700
Animals (& plants!) release CO2 into the atmosphere in what process? (technical term!!)
Respiration
800
Now label the 5 level trophic pyramid with all of the keywords needed
Producer, Primary consumer, etc. Apex Predator
Herbivore, Carnivore, heterotroph, autotroph
800
What makes something a symbiotic relationship?
They involve a long-term interaction between two or more different species where at least one organism benefits
800
The ____________ of dead organisms and waste products eventually leads to fossil fuels
Burning fossil fuels releases CO2 into the atmosphere by the process of ____________
Decomposition
Combustion
900
How many different length food chains can you make with the eagle as the apex predator? Then calculate how much energy is in the eagle for EACH chain, once again assuming the producer has 10,000 units of energy and the 10% rule holds true.
3rd trophic level = 100 units of energy
Plant->Sparrow->Eagle
4th trophic level = 10 units of energy
3 different paths
5th trophic level = 1 unit of energy
2 different paths
900
Which type of competition is which and what signs would you use to categorize both and why?
Intraspecific = within same species
Interspecific = across different species
Both = (-,-)
Because everyone is loses during competition
900
Label the diagram using all of the key terms
1 = Combustion
2 = Respiration
3 = Photosynthesis
4 = Decomposition
5 = Fossil Fuels
6 = CO2
1000
What could happen to the community if foxes suddenly vanished? This would be a _______ (4 words)
Mice and rabbits would increase
This would cause a decrease in grass
This would then ripple back up the food web causing everything else to decrease
Top down trophic cascade
1000
Two male rams fight over mates. This is an example of what? (be specific!)
Give an example of the other type
This is INTRAspecific
Interspecific would be like lions and hyenas fighting over food. (as long as they are different species it is interspecific)
1000
Break down the word biogeochemical cycles into parts and give a definition using the parts and working backward like we did in class
Cycles → things that repeat or go around in a circle
Chemical → having to do with substances or elements
Geo → Earth
Bio → life
Biogeochemical cycles are repeating processes that move matter through living things, the Earth, and chemical forms — like how carbon, water, and nitrogen cycle through the environment.
(would accept similar variations)