Using Transects - PRACTICAL Flashcards
Ecology (10 cards)
What are transects used for in ecological studies?
To study the distribution of organisms along a line
Transecia help in observing how organisms are distributed across an area.
What is the first step in using transects to collect data?
Mark out a line in the area you want to study using a tape measure
This establishes the transect for data collection.
How can data be collected along a transect?
By recording all the organisms along the line or by using quadrats
Quadrats can be placed at intervals along the transect.
What is a quadrat?
A square frame used to measure the area of organisms in a habitat
It helps estimate the abundance and distribution of organisms.
How can you estimate the percentage cover of a quadrat?
By estimating the percentage area covered by a particular type of organism
This is done by counting the number of squares occupied by the organisms.
If 42 squares in a quadrat are covered by organism A, what is the percentage cover?
42%
Calculation: (42/100) x 100 = 42%
If 47 squares in a quadrat are covered by organism B, what is the percentage cover?
47%
Calculation: (47/100) x 100 = 47%
How is a square counted in a quadrat?
If it’s more than half covered by an organism
This method helps in estimating the coverage accurately.
True or False: Transects can only be used in fields.
False
Transects can be used in any interested area, such as beaches.
What is the purpose of placing quadrats at regular intervals along a transect?
To systematically collect data on organism distribution
Regular intervals help in analyzing changes in distribution.
