Summary AQA ALEVEL BIOLOGY NOTES ON CONSERVATION OF ENERGY

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Balance between Conservation and Farming
Environmental problems caused by intensive monoculture



Depletion of minerals
of
.



Loss
-



habitats
of artificial fertilisers
Widespread use
'




Unattractive
'




countryside of
Compaction soil
-




Wind
•


erosion

Eutrophication
'



Reduced
flexibility
-




Reduced species diversity
-




Widespread
'



use of herbicides , pesticides
Pests spread
and
quickly
-

disease
No rotation ,
cycle of pest continues
crop
-




Deforestation %
"E - →
Reasons for deforestation Effects of deforestation

For timber Reduced
'
-




biodiversity
.
For land use
'




Habitat loss

-
For farming .

Contribute to
greenhouse effect
-
Wild fires •
Soil erosion

To build roads food
Destroying chains
•
-




Urbanisation
-




÷ ÷
Pesticides
:*
These chemicals that used to kill that
are are
organisms :




Compete with plant
-

a crop or animal

with
Eat plant animal ( i. Compete
•


a crop or
e. us )


Otherwise injure damage plant intestinal
•

or or animal e. wor ms
a
g.



→ Bioaccumulation refers to the
built-up of a chemical through a food chain .




maximised
→ Biomagnification is the increase concentration of toxic chemicals ,
such as pesticides as it is
passed upwards and


to the top predator of the food chain .




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-




x-x-x.ae#
Methods
Farming Techniques that Reduce Biodiversity conservation

' """"" """" """" """" "" "
¥

1 Woodland clearance
1 Giving endangered species legal protection
2 Hedgerow removal
2
Creating protected areas

3 Pesticides 3 The Environmental stewardship Scheme
4
Herbicides ( weed killers)
5 Monoculture