Flashcards in Organisms in the Environment and feeding relationships Deck (14):
All organisms of one species in a habitat
All different species in a habitat
An area where an organism lives
All organisms living in an area and all non-living conditions
Steps to use quadrats to estimate population sizes
1) Place quadrat at random point on ground in area
2) Count organisms in that area
3) Multiply by total area of habitat
What is a quadrat?
Square frame enclosing a certain area
What does it mean to 'sample distribution of organisms'?
To find how organisms spread across their habitat. For example, how species change from a hedge toward a field
Steps to use quadrats to sample distribution of organisms
1) Mark out a line in area
2) Lay quadrats in that line, called a transect
3)Collect data along transect
What is a producer
Organism that makes its own food using energy from the sun
Give an example of a decomposer
What does each bar on a pyramid of biomass represent?
Mass of living material
In a food chain, what percentage of the total energy becomes biomass
Living matter used as fuel