Distribution Of Organisms MINI DECK Flashcards
Give a definition for a abiotic factor.
Non-living factors that can affect thr distribution of Organisms.
Give a definition for a biotic factor.
A living factor that affects the distribution of Organisms
3 examples of biotic factors
-Grazing
-Predation
-Disease
-Competition
3 examples of abiotic factors.
-Moisture
-Light Intensity
-PH
-Temperature
What is used to measure soil moisture?
Soil Moisture Meter
Name 2 types of sampling
-Quadrats
-Pitfalls Traps
Name a possible source of error with a pitfall trap.
The captured animals may eat one another
Name a possible source of error with quadrats.
The numbers and types of plants may not be representative of the ecosystem
Why are biological keys used?
To allow biologists to study organisms without taking them away and disrupting the ecosystem they are in.
What is an indicator species?
Indicator species are Organisms that show levels of pollution or environmental quality by their presence or absence in the environment.
What is a paired statement key?
A numbered list of statements
What are quadrats used to sample?
Low growing plants
What are pitfall traps used to sample?
Invertebrates living on the soil surface
