The abundance of organisms in an ecosystem is dependent upon biotic (living) and abiotic (non-living) factors. Abundance and distribution are estimated using techniques such as transects and quadrats.
Which of these are abiotic factors?
Light intensity and new predators
Temperature and soil pH
Food and new pathogens
Which of these are biotic factors?
Dissolved oxygen and carbon dioxide levels
Wind intensity and out-competition
Food and new predators
Which of these is true for predator-prey cycles?
The number of prey increases at the same time as the number of predators
There are always more prey than predators
There are always more predators than prey
What type of traps catch small mammals and invertebrates?
If you were looking at species richness what would you be counting in a quadrat?
The total number of different species
The percentage of a quadrat covered by one species
The number of times one species is present
What is a transect?
A square placed on the ground to count plants
An imaginary line used as a part of systematic sampling
A diagram that looks like a kite
What is the mode?
The average value
The middle number
The most common number
What is eutrophication caused by?
The greenhouse effect
How would you show your results after you have sampled along a transect?
In a line graph
In a kite diagram
In a bar chart
Which of these substances does not bioaccumulate?