studying ecosysems

Question 1

what do quadrats study

Answer 1

the distribution and abundance of organisms
so species eveness and richness

Question 2

what method discover percentage cover

Answer 2

point frame

Question 3

what is percentage cover

Answer 3

the percentage of area the plant covers.

Question 4

what is a point frame

Answer 4

quadrat with pins, you place it down and count the plants which touch the pin

Question 5

why must quadrats be placed multiple times and not just in one position of an area

Answer 5

taking samples from only 1 place of the field, as that area can have high nitrogen or species that are present there can be different to the rest of the field.
causing overestimation

Question 6

what do you have to use to randomly find coordinated for the quadrats

Answer 6

random number generator

Question 7

describe how to sample with quadrats

Answer 7

use random number generator to find coordinates.
place two tape measures in a right angle.
lay the bottom left hand corner of the quadrat on the coordinate
repeat across the habitat
record in a cumulative frequency table

Question 8

what is systematic sampling

Answer 8

taking samples at regular distances across the habitat, so you sample every part of the habitat.

Question 9

what is the name of table which you record data recieved from systematic quadrat sampling.

Answer 9

cumulative frequency table.

Question 10

after systematic sampling what is the formula used to estimate population size of each species

Answer 10

mean number of individuals of the species in each quadrat
—————————————————fraction of total habitat area covered by single quadrat

Question 11

what is the difference between a line and belt transect

Answer 11

line- tape measure on floor and count plants which touch the tape measure

belt- place tape measure, place quadrat against belt