B7- Abiotic And Biotic Factors Flashcards
What are the two types of factors that can change in an ecosystem?
Abiotic (non-living) and biotic (living) factors
Give three examples of abiotic factors.
- Wind intensity and direction
- Moisture level
- Light intensity
How can changes in abiotic factors affect population sizes?
Changes can affect the size of populations in a community and consequently affect other organisms that depend on them
Fill in the blank: A decrease in light intensity can cause a decrease in the _______ rate of a plant.
photosynthesis
What are biotic factors?
Living factors that affect ecosystems
List two examples of biotic factors.
- New predators arriving
- Competition between species
True or False: A new pathogen can lead to a decrease in the population of a prey species.
True
What effect can competition have on species in a community?
One species may outcompete another, leading to low breeding numbers
Fill in the blank: A change in the environment could be the introduction of a new _______ factor.
biotic
What happened to the population size of Species A in 1985?
It decreased rapidly
What can be a consequence of interdependence in an ecosystem?
Changes in one population can affect others
How did the introduction of grey squirrels affect red squirrels?
Grey squirrels outcompete red squirrels, decreasing their population
What are the implications of a decrease in soil mineral content for plants?
It could cause nutrient deficiencies and affect plant growth
List four abiotic factors that can vary in an ecosystem.
- Temperature
- Oxygen level (for aquatic animals)
- Carbon dioxide level (for plants)
- Soil pH and mineral content
