Download key - CPalms

1
ANSWER KEY
Limiting Factors Quiz
Name:___________________________________Period:_________
Word Bank
Native Species
Coral Reef
Non-native species
Introduced Species
Estuary
Biotic Factor
Limiting Factor
Wetland
Abiotic Factor
Answer the following questions or complete the task using terms from the word bank above:
Answers will vary, but sample answers are provided.
1. How are Burmese python populations affecting native populations of organisms in the Everglades?
The non-native species, the Burmese python are killing native species of populations of birds and reptiles, and compete for both
biotic and abiotic resources. These pythons are an introduced species probably due to the release or escape of an exotic pet(s).
2. How does light, depth of water, and temperature limit the growth of coral reefs?
In coral reefs, the protists living in corals need light to undergo photosynthesis. The abiotic factors of temperature, light and water
depth affect whether these protists can undergo photosynthesis. Coral reefs need warm, shallow tropical water.
3. List four land ecosystems in Florida.
Prairies, Forests, Beaches, Dunes
4. What is a limiting factor in freshwater ecosystems?
Light, nutrients, rocks, runoff, pollution are all abiotic limiting factors in freshwater ecosystems.
5. Can storms, and natural disasters be a limiting factor, and how so?
Yes, they can cause erosion or fires which can lead to loss of habit
6. Explain how competition, predation and disease affect populations?
Populations decrease due to limited resources, or death from predation or disease due to diminished health.
7. Explain how governmental agencies can preserve resources from being destroyed by human activities, and
include an example of an ecosystem that needs protection. Policies/programs can be created to monitor the populations of species.
Restrictions on human activity that encroaches on populations can be introduced. (Estuary protection from runoff of fertilizers)
8. Why are populations limited in how large they can get?
Resources are not unlimited.
9. If marine ecosystems became too acidic due to high levels of carbon dioxide, and this caused mutations in the
plankton populations how would this impact other species? Since plankton populations are at the base of the food
chain, this could indicate that mutations in other organisms higher up in the food chain may result.
10. How are wetlands beneficial to humans?
Wetlands help filter ground water helping it to get purified as it enters the water table.
True/False: Mark a T for True or an F for False in the blank space provided.
T
______11.
Wetland plants help remove pollution from water.
F
______12.
If too many organisms live in a given area, space will not be a limiting factor.
F
______13.
Sand pine populations can be limited in size if there are no fires.
F
______14.
Introduced species often have no predators or diseases in their new habitats.
F
______15.
Humans are not dependent on resources from the marine ecosystem.