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1. NAME: AYESHA SHAIKH
ROLL No.: 27
Stream: Commerce 1
STD: S.Y.J.C
TOPIC
Biodiversity loss

2. • Loss of biodiversity or biodiversity loss refers to either
• the ongoing extinction of species worldwide or
• the local reduction or loss of species in a certain habitat or ecological
niche or biome.
• The latter phenomenon can be temporary or permanent, depending on
whether the environmental degradation that leads to the loss is reversible
through ecological restoration / ecological resilience or effectively
permanent (e.g. through land loss). Global extinction has so far been
proven to be irreversible.
• Even though permanent global species loss is a more dramatic
phenomenon than regional changes in species composition, even minor
changes from a healthy stable state can have dramatic influence on
the food web and the food chain insofar as reductions in only one species
can adversely affect the entire chain (co extinction), leading to an overall
reduction in biodiversity, possible alternative stable states of an ecosystem
notwithstanding. Ecological effects of biodiversity are usually counteracted
by its loss. Reduced biodiversity in particular leads to reduced ecosystem
services and eventually poses an immediate danger for food security, also
for humankind.
INTRODUCTION

3. BBA3(Gajaseni) 3
LEVELOF BIODIVERSITY
• 3 level of biodiversity are
considered:
1. Genetics diversity
2. Species diversity
3. Ecosystem diversity

4. BBA3(Gajaseni) 4
• 1.4 million species of flora, fauna
and microbes have been examined,
named and classified.
• Scientists estimate total species
diversity 5-30 million species on
earth that have not yet been
explored.

5. BBA3(Gajaseni) 5
VALUEOF BIODIVERSITY
• Biodiversity at all levels contribute and
sustain human life and economic
activity
• Biodiversity provides ‘biological
wealth’
• Species is directly useful to humans,
such as food, medicines, fuel,
construction materials, and other
utilitarian needs.

6. BBA3(Gajaseni) 6
But, these species currently
used are only a tiny fraction of
total species diversity.
????

7. BBA3(Gajaseni) 7
SPECIES DIVERSITY VALUES
• Species have use values such as:
– raw materials
– foods
– fiber plants
– medicines
– bioenergy
– natural pesticides
– scientific and educational materials

8. BBA3(Gajaseni) 8
Genetic diversity value
• I t i s f o c u s i n g o n :
– Genetic resources
– Commercial products (Agricultural or
pharmaceutical products)
– Genetic modification
– Genetic engineering
• It is difficult to provide the monetary
values.

9. BBA3(Gajaseni) 9
Ecosystem diversity value
• It provides lots of services to the whole
earth which might be valued relative to its
services:
– food production
– energy supply
– water supply
– aesthetics
– etc.

10. BBA3(Gajaseni) 10
Biodiversity in Thailand
• In 1961, forest covered more than half of
Thailand’s land area.
• The forest cover dropped to 28% after 3
decades.
• Thailand located between the Indo-
Malayan and Asian continental
biogeographical region.
• Thailand has been rich in biodiversity
(genetics, species and ecosystems)

11. BBA3(Gajaseni) 11
BIODIVERSITYLOSSINTHAILAND
• The significant biodiversity loss is
related to the loss of:
– Terrestrial forests
– Coastal mangrove forests
– wetlands
• Even 16% of total land area of the
country will be declared as ‘Protected
area’ but still have pressure of
deforestation.

12. THANK
YOU