Summary AQA ALEVEL BIOLOGY NOTES ON BIODIVERSITY

Biodiversity
Biodiversity
→
is the of all the life Earth
variety on .




Biodiversity
( variation of
living organisms)

-




Interspecific Ecosystem
Intraspecific or
or


Genetic
Diversity
Species Diversity (
Diversity
of
variety
(
variety of alleles)
(
variety of species) habitats within
an
ecosystem)




Interspecific Diversity ( species Diversity ) %
I /
,
9 -
'
T- s - I - - l - - _ , y
¥
Interspecific diversity is the variety of species in
community
-


a .




> Species richness is the number of different species in a
community .




of d
Index Diversity
"
An index of of
diversity describes the
relationship between number species in a
community and

number of individuals in each species


N (N 1) The the number
higher the
-




d =
.


, more diverse the area .




-±
.
If all individuals are of the same ( no
species
N = total number of of all the 1
organisms species
biodiversity ) ,
index is .




h = Total number of of
organisms each species


-




i. A
high value of d indicates an old and stable ecosystem
A low value of d indicates recent succession or
damage




.÷÷⇐⇐÷÷÷:* Farming
The Balance between Conservation and


"÷




Continuance of Insurance Moral reasons
evolutionary culture that respect
encourages
processes wildlife
and stewardship for and

landscapes

Reasons for the

of
conservation
biodiversity


Aesthetic reasons

and should
landscapes species
Biodiversity provides
all be
Providing conserved they
as are
actual and
potential important
beautiful and enrich lives of
material and natural functions
economic humans
benefits to
people