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Benefits of Biodiversity
Section 3
Does Biodiversity Matter?
 Scientists
have offered a number of
concrete, tangible reasons for preserving
biodiversity directly or indirectly that
supports the long term sustainability of
human society.
 In addition, beyond tangible benefits to
humans, many people feel that there are
ethical and aesthetic dimensions to
biodiversity preservation.
Valuable Ecosystem
 Healthy
forests can provide clean air and
prevent against flood and drought.
 Native crops can provide against disease
and drought.
 Abundant wildlife can attract tourists and
boost economies in developing countries.
Biodiversity provides:
Food, fuel and fiber.
Shelter and building materials.
Purifies air and water.
Detoxifies and decomposes wastes.
Stabilizes and moderates Earth’s climate.
Moderates floods, droughts, wind, and temperature
Generates and renews soil fertility and cycles nutrients.
Pollinates plants, including many crops.
Controls pests and disease.
Maintain genetic resources as key inputs to crop
varieties, livestock breeds, and medicines.
Provides cultural and aesthetic benefits.
Provides us the means to adapt to change.
Conservation Biology
It is a scientific discipline devoted to
understanding the factors, forces, and processes
that influence the loss, protection, and
restoration of biological diversity within and
among ecosystems.
 This concept arose in response to increasing
extinction rates.
 Conservation biologists attempt to integrate an
understanding of evolution and extinction with
ecology and the dynamic nature of
environmental systems. They use field data, lab
data, theory and experiments to study the impact
of humans on other organisms.
Endangered Species Act
Was passed in 1973
 Forbids government and private citizens from
taking actions that would destroy endangered
species or their habitats.
 Forbids trade in products made from
endangered species.
 The aim is to prevent extinctions, stabilize
declining populations, and, when possible, to
enable populations to recover to the point where
they no longer need protection.
Bringing back Endangered Species
Breeding – can be raised and then
released into the wild.
 DNA Cloning
 International Treaties – protecting by not
allowing transport.
 Community Based Conservation – engage
local people to protect wildlife in their own
 Captive
The loss of biodiversity matters, scientists agree,
because biodiversity pragmatic benefits are
such that human society could not function
without them. As a result, many conservation
biologists and others are rising to the challenge
of conducting science aimed at saving
endangered species, preserving their habitats,
restoring populations, and keeping natural
ecosystems intact. The innovative strategies of
these scientist hold promise to slow the erosion
of biodiversity that threatens life on Earth.