Food Webs
the sun
What is the source of energy in any food web?
They have no predators in the new environment.
living organisms and the physical environment
ecosystem
By eating the cichlids, build up of algae resulting in dead zones, providing more fish for large fishing companies.
Results of introducing Nile Perch to Lake Victoria
A mountain lion eating a deer.
What is an example of a predator-prey relationship?
To the animal gaining energy
Which way do arrows point?
Billions of dollars each year
How much is spent on trying to control or eliminate invasive species each year?
The non-living components of an ecosystem
abiotic
By the number of tangling worm and number of spread out worms.
How can we tell which habitat the blackworms prefer?
Deer and elk browsing shrubs for food in winter.
What is an example of competition?
Organisms that make their own energy
What are producers?
Nile Perch, zebra mussels, tegu, lionfish, Nutria
Examples of invasive species
The close and often long-term interaction between two species
symbiosis
How did we determine an owl's place in the food web/ what it eats?
What is an example of a mutualistic relationship?
Organisms that break down waste or dying matter
What are decomposers?
By being a predator to the species or eating another species food source.
How are invasive species harmful to native species?
A square or rectangular plot of land marked off, to determine where to collect samples.
Quadrat
10%
How much energy is passed to the next organism?
Lice on a person's head
What is an example of a parasitic relationship?
The flow of energy
What do food webs show us?
Biological, chemical, manual
three ways to control or eradicate an invasive species
independent variable
More food availability leads to a larger population
How does food availability affect the population size?
Vultures eating an animal killed by a mountain lion.
What is an example of commensalism?