null
US
Sign In
Sign Up for Free
Sign Up
We have detected that Javascript is not enabled in your browser. The dynamic nature of our site means that Javascript must be enabled to function properly. Please read our
terms and conditions
for more information.
Next up
Copy and Edit
You need to log in to complete this action!
Register for Free
7543775
OCR - A-Level - Biology - Biodiversity
Description
A level Biology (AS Module 4) Mind Map on OCR - A-Level - Biology - Biodiversity, created by Josh Anderson on 04/02/2017.
No tags specified
biology
as module 4
a level
Mind Map by
Josh Anderson
, updated more than 1 year ago
More
Less
Created by
Josh Anderson
over 7 years ago
82
0
0
Resource summary
OCR - A-Level - Biology - Biodiversity
Measuring biodiversity
Species richness
The more different types of species present, the richer the habitat.
Observations of species present
Qualitative
Species evenness
Takes into account the population size of each species. Even when most of the species are abundant, rather than one dominant.
Observations of species and numbers of each to compare
Quantitative
Animals
Large
Careful observation of species and counting individuals
Small
Take samples of animals present, mark and capture
Mark and Recapture
Capture and mark the organisms harmlessly.
The number of captured organisms of this species is C1
Release the organisms that have been captured and marked.
Capture organisms again.
The number of captured organisms the second time around is C2.
The number of already marked organisms in this sample is C3.
Total population = (C1 x C2)/C3
E.g C1 = 3, C2 = 4, C3 = 2
(3x4)/2 = 6
Population is 6
Simpson's Diversity Index
D = 1- [∑(n/N)^2]
D = Diversity
∑ = Sum of all species [(n/N)^2]
n = Number of a particular spp of plant
N = Total number of all individuals of spp (∑n)
D will be between 0 and 1
Show full summary
Hide full summary
Want to create your own
Mind Maps
for
free
with GoConqr?
Learn more
.
Similar
Biology AQA 3.1.3 Cells
evie.daines
Biology AQA 3.2.5 Mitosis
evie.daines
Biology AQA 3.1.3 Osmosis and Diffusion
evie.daines
Biology- Genes, Chromosomes and DNA
Laura Perry
Biology- Genes and Variation
Laura Perry
Enzymes and Respiration
I Turner
GCSE AQA Biology - Unit 2
James Jolliffe
GCSE AQA Biology 1 Quiz
Lilac Potato
Using GoConqr to study science
Sarah Egan
Cells and the Immune System
Eleanor H
GCSE Biology AQA
isabellabeaumont
Browse Library