measuring living organisms in an ecosystems

Question 1

a population is

Answer 1

the total number of individuals of one species in a particular habitat at a particular time

Question 2

ecologists measure the size of a population in a habitat using a

Answer 2

quadrat

Question 3

most of the time for a quadrat we use a …cm X ..cm square

Answer 3

50cm X 50cm
0.25m^2

Question 4

to measure the population you

Answer 4

place it on the ground
count the number individuals of your species inside the square

Question 5

when individuals are on the edge to make sure data is consistent you..

Answer 5

only count those on the top and left edges only

Question 6

if it is difficult to count your species (grass) you can..

Answer 6

estimate the percentage of the quadrat area covered by the species

Question 7

to find out the population of a species in a habitat you would

Answer 7

calculate area
measure quadrat
repeat 10X for reliability
average num in quadrat
how many quads fit in total area
multiply amount fit by averg num

Question 8

how do you make sure your data is valid

Answer 8

use random sampling

Question 9

how do you take a random sample

Answer 9

make right angle by 10mX10m axis
generate random coordinates
OR randomly throw over shoulder