The biological diversity of life on earth is the foundation of human existence and well-being. Biodiversity and viable ecosystems protect us from natural disasters, regulate the climate, and provide food, fertile soil, and medicine. But biodiversity is declining and many of the world’s greatest biodiversity hotspots are located in countries burdened by poverty, food insecurity, and intensifying climate change. These underlying drivers of biodiversity loss are a result of unsustainable human activity and behavior. To protect biodiversity – and the prosperity of communities around the world – we must adopt and spur demand for more responsible and sustainable practices that safeguard soil, water, forests, and wildlife.

1. Biodiversity:
Issues,
Concerns,
Management
Presented by:
Rakibul Islam
Reg: 22-05-6106
Summer 2022

2. Introduction
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The term biodiversity was coined
byWalter G. Rosen in 1986. It deals
with nature’s variety, the
biosphere.
• Biodiversity is the variety of living species on
Earth – plants, animals and microorganisms – and
the ecosystems they form. An ecosystem is the
name given to all living species that live together
in a stable community, interacting with one
another and their physical environment.
• Biodiversity includes the diversity within species
and between different species within terrestrial,
freshwater and marine ecosystems. Ecosystems
need a balanced and diverse number of species to
thrive.
• Biodiversity holds ecological and economic
significance. It provides us with nourishment,
housing, fuel, clothing and several other
resources.

3. Importance
Maintaining the
balance of the
ecosystem
Provision of
biological
resources
Social benefits
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Importance of Biodiversity
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4. Issues of
Biodiversity
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ENVIRONMENTAL
ISSUES
The earth’s biodiversity (number of different
species that live in an area) is facing a new crisis
due to a dominant new animal – HUMAN!!

5. 5

6. 6

7. Reason for
Concern
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• Ecosystem services
• Biological resources
• Social benefits
Why should we
care and be
concerned???
Biodiversity is rapidly declining.

8. • We have the power to destroy or save
species.
Ethics 8
• It is wrong for us to destroy other species.
• It is right for us to save other species.

9. 9
• The diversity of species gives
beauty to our world and the
experiences of life.
Aesthetics 9

10. 10
• A tremendous portion of our economy
depends on biological species.
Economics
• Species extinctions deny us potential
economic opportunities.

11. 11
New Medicines
• Many of our medicines are based upon
biological species.
• Species extinctions deny us potential
new medicines.

12. 12
New Foods
• All of our foods are based on biological
species.
• Species extinctions deny us potential
new foods.

13. 13
Ecosystem Stability
• Complex ecosystem with greater species
diversity are more stable over time.
• Species extinctions makes ecosystem
less complex and less stable.

14. 14
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Future Generations
• We must preserve the biological
wealth of the earth for the sake
of our children, grandchildren
and countless future generations.

15. Management
Ecosystem approach
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• Aquatic biodiversity plays a vital
role in rural livelihoods.
• However, it is being threatened
by factors within the fisheries
sector, such as overfishing,
destructive fishing practices
and introduction of alien
species, as well as by external
factors such as habitat loss and
degradation mainly caused by
land-based activities.

16. 16
Management
Fishery Regulations
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• Set catch limits well below the maximum
sustainable yield
• Improve monitoring and enforcement of
regulations
• Economic Approaches
• Sharply reduce or eliminate fishing
subsidies
• Charge fees for harvesting fish and
shellfish from publicly owned offshore
waters
• Certify sustainable fisheries
• Protected Areas
• Establish no-fishing areas
• Establish more marine protected areas
• Rely more on integrated coastal
management
• Consumer Information
• Label sustainably harvested fish
• Publicize overfished and threatened
species

17. 17
Management
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By catch:
• Use wide-meshed nets to allow escape of
smaller fish
• Use net escape devices for sea birds and
sea turtles
• Ban throwing edible and marketable fish
back into the sea
Aquaculture:
• Restrict coastal locations for fish farms
• Control pollution more strictly
• Depend more on herbivorous fish species
Non-native Invasions:
• Kill organisms in ship ballast water
• Filter organisms from ship ballast water
• Dump ballast water far at sea and
replace with deep-sea water

18. Management
Protecting Wetlands
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• Legally protect existing wetlands
• Steer development away from
existing wetlands
• Use mitigation banking only as a
last resort
• Require creation and evaluation
of a new wetland before
destroying an existing wetland
• Restore degraded wetlands
• Try to prevent and control
invasions by non-native species

19. Conclusion
• Biodiversity is a concept that has no general
definition. Usually it is used in a context that
stresses the need for attention on our living
environment and the sustainable use of natural
resources.
• Loss of biodiversity and biodiversity conservation
are concepts that provide the basis for biodiversity
management.
• The management of biodiversity is a complex
matter that needs the involvement of many
different partners ranging from governmental
organizations to private companies, NGO's and
volunteers.This aside, national and international
commitment, legislation and enforcement offer an
essential framework for promoting and
maintaining biodiversity. 19

20. Thanks for
patience..
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