Ecology Review

According to the food web, which of the following organisms can be classified into more than one trophic level? 

• grasshopper
• owl
• rabbit
• frog

Based on the food web shown above, which of the following is most likely responsible for the rabbit population trend as shown in the graph? 

• increase in amount of grass
• decrease in amount of grass
• overpopulation in squirrel population
• increase in rabbit population

Tell if the item is an abiotic factor or biotic.....

Water

• Abiotic

• Biotic

Energy in an ecosystem is used for growth or lost as __________

• light
• heat
• death
• biomass

Algae, grasses and trees are all __________.

• decomposers

• consumers

• producers

• pyramids

What is the definition of an ecosystem?

• A group of animals of the same species living in the same place.

• All the plants and animals living in the same place.

• All organisms living in the same place and the abiotic factors that affect them.

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

Two or more members of a particular species living and interacting in the same area

• Community
• Population
• Organisms
• Biosphere

Which organisms are both secondary and tertiary consumers in this food web?

• Chemosynthetic bacteria and amphipods
• Zooplankton and mussels
• Ratfish and octopuses
• Galatheid crabs and zoarcid fish

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

• 10 Kcal
• 1 Kcal
• 100 Kcal
• 1000 Kcal