Surveys

Question 1

What is a survey

Answer 1

The recording of qualitative or quantitative biological data using easily repeatable standardised techniques over a restricted period without preconception of the results.

Question 2

Index

Answer 2

Index means a measurement that is related to the actual total number of animals/plants

Question 3

Population indices for quadrats/plot/sample unit

Answer 3

Population (n)= total number of individuals per quadrat/sample unit x (area of habitat/area of quadrat)

Question 4

Population indices for mark-recapture

Answer 4

Population (n)= total number of animals in 1st sample x (total number of animals in 2nd sample / number of marked animals in 2nd sample)

Question 5

Environmental variable

Answer 5

Rainfall, temperature, pH, salinity, dissolved O2

Question 6

Biotic variables- species level

Answer 6

Population data, site, nationally, species. Impact of one species on another

Question 7

Biotic variables-habitat/Ecosystem level

Answer 7

Community change over time

Question 8

Monitoring programmes should be

Answer 8

Controlled, replicated, randomised

Question 9

DAFOR

Answer 9

Dominant
Abundant
Frequent
Occasional
Rare

Question 10

Quadrats

Answer 10

Species population density
Percentage cover
Frequency of occurrence of a species