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biology paper 2
topic 7 - ecology
maintaining biodiversity
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Breeding programmes reduce the likelihood that
endangered
species will go
extinct.
This improves
biodiversity.
Breeding programmes involve
breeding
the species in
captivity
to build up their
numbers.
Hopefully, at some point, the species can then be
reintroduced
into the wild.
In the wild, they can either join an
existing
population or form a new one.
A problem with breeding programmes is that, if the species' natural habitat is unsafe;
The
endangered
species population will just
decrease
again.
A solution to this is regenerating rare
habitats.
If these areas are protected properly, we should not need these
breeding
programmes in the first place.
Governments help reduce the impact of farming by;
Introducing new
laws.
Paying
farmers to do the right thing.
For example, a field
margin
where anything can grow (a strip around the field).
Having
field
margins and
hedgerows
is being encouraged because;
It increases
biodiversity
because different
habitats
and
food
sources are present so more species can live there.
Government regulates things by setting
quotas
on things such as;
How much
deforestation
is allowed each year.
How much
carbon dioxide
can be released into the
atmosphere
by businesses.
As individuals, if we choose to
recycle
our
waste
rather than putting it in the bin and don't buy as much things that we don't need;
There will be less waste in
landfill
sites.
Less waste in landfill sites means that;
There will be less
damaged
land.
There will be fewer toxic
chemicals
that can go into the environment.
Protecting biodiversity is
expensive.
Individuals, companies, and governments often overlook how they benefit from high
biodiversity.
Therefore, they generally prefer to use their
money
elsewhere.
In order to maintain our current high standard of living, we need to damage the environment.
For example, we must use
fertilisers
and
pesticides
in order to grow enough food for everyone.
We must dig large
mines
so that we can get to the rare
metals
that we need for our
phones
and
computers.
In developing countries, people often rely on the environment for their livelihood.
For example, when they cut down
forests
, it is often to build their
homes
(out of wood) or have enough
firewood
to cook food or grow a few
crops.