Transcript hebashaaban studios

HEBASHAABAN
STUDIOS
PROUDLY
PRESENTS
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Biodiversity is the measurement of the
degree of variation of life within an
ecosystem, from genes to species, through
to the broad scale of ecosystems. It is the
result of evolution. The diversity of species
help keep an ecosystem stable, and
increases the probability that some
organisms will survive during detrimental
changes. There is a deep connection
between biodiversity and the stability of an
ecosystem.
What is the
relationship between
biodiversity and the
stability of an
ecosystem?
The mix of species in an
ecosystem makes it difficult for
any disease or foreign predator
to move quickly through that
environment. So, biodiversity
serves as a barrier between the
disease and the ecosystem. On
the other hand, if only one kind
of organism was to be found in
an ecosystem, and a single
disease or insect attacked it,
the entire population is
damaged.
HOW DO INTERACTIONS BETWEEN
ORGANISMS LEAD TO A STABLE
ECOSYSTEM ?
The interactions between organisms may allow an
ecosystem to remain stable for hundreds or
thousands of years. In established and stabilized
ecosystems, populations increase or decrease in a
predictable cycle. Over time, the size of the
population remains relatively stable. For
example, when the prey population increases, a
large food supply causes the size of the predator
requires many prey to meet its energy needs, the
prey population rapidly decreases. Then, with the
decrease of prey population, the predators begin
to starve. When there are few predators, the prey
population reproduces and becomes greater
again. The cycle continues.
Why is Biodiversity important? Does it
really matter if there aren’t so many
species?

Biodiversity boosts ecosystem
productivity where each species, no
matter how small, all have an
important role to play. (Niche)

For example, a larger number of
plant species means a greater
variety of crops; greater species
diversity ensures natural sustainability
for all life forms; and healthy
ecosystems can better withstand and
recover from a variety of disasters.

Almost all cultures have their roots in
our biological diversity in some way
or form.

Each species depends on the
services provided by other species to
ensure survival.
The reservoir of genetic traits present in wild varieties and grown land is important in
improving crop performance. Important crops, such as potato, banana and coffee, are often
derived from only a few genetic strains. A biodiverse environment preserves that ecosystem.
Crop diversity aids recovery when the dominant crop is attacked by a disease or predator:
 The Irish potato blight of 1846 was a major factor in the deaths of one million people and
the emigration of another million. It was the result of planting only two potato varieties,
both vulnerable to the blight.
 When rice grassy stunt virus struck rice fields from Indonesia to India in the 1970s. Only
one kind was resistant.
 Coffee Rust attacked coffee plantations in Sri Lanka, Brazil, and Central America in 1970
Higher biodiversity also limits the spread of infectious diseases as many different species act
as buffers to them.
Although about 80 percent of humans' food supply comes from just 20 kinds of plants,
humans use at least 40,000 species. Many people depend on these species for food, shelter,
and clothing. Earth's surviving biodiversity provides resources for increasing the range of
food and other products suitable for human use, although the present extinction rate
shrinks that potential.
• Some of the health issues influenced by biodiversity include dietary
health and nutrition security, infectious disease, medical science and
medicinal resources, social and psychological health.Biodiversity is
also known to have an important role in reducing disaster risk, and in
post-disaster relief and recovery efforts.
•Biodiversity provides critical support for drug discovery and the
availability of medicinal resources. A significant proportion of drugs
are derived from biological sources.
Many industrial materials derive directly from biological sources.
These include building materials, fibers, dyes, rubber and oil.
Biodiversity is also important to the security of resources such as
water, timber, paper, fiber, and food. As a result, biodiversity loss is a
significant risk factor in business development and a threat to long
term economic sustainability.
WHAT THREATENS
BIODIVERSITY?
The
loss of biodiversity in an ecosystem upsets its stability. Removing species
causes the loss of organisms that filled critical niches.
Species
may be lost when natural disasters or human activities cause
destructions to habitats. For instance, clearing a forest destructs ecosystems that
will never recover.
Species
can be lost when humans do not consider the environmental impact of
their actions. For example, when humans hunt predatory lions for “fun,” it leads
to population explosions of deer, which then leads to overgrazing, the reduced
food supply. So, many deer starved, and soil erosion was a result.
Over-hunting has been a significant cause of the extinction of hundreds of
species and the endangerment of many more, such as whales.

Habitat
loss/degradation/fragmentation is an important cause of known
extinctions. As deforestation proceeds in forests, this promises to become the
cause of mass extinctions caused by human activity.
Invasion
of non-native species is an important and often-overlooked cause of
extinctions. For example, the zebra mussel that was brought to the Great Lakes.
Pollution
from chemical contaminants certainly poses a further threat to
species and ecosystems.
Climate
change: A changing global climate threatens species and ecosystems.
plants and animals may not be able to adjust.
How do we conserve biodiversity ?
The authorities should encourage the public to conserve the diversity of life on
our planet. Traders need to be forced into complying with the law, because if they
stop buying and selling wildlife, those animals won’t be hunted in the future.
People should reduce energy usage and carbon emissions to halt climate change
and global warming.
People should plant more trees to increase habitats and help species to survive.
Rural farmers should stop the slashing and burning of land, as this pushes some
species towards extinction.
Fishermen should not hunt aquatic life using explosives or electricity in rivers,
as this causes a risk of aquatic species becoming extinct.
It is essential for everyone to understand the challenges we face in protecting our
natural resources.
Director
Heba Shaaban
Executive Producer
Heba Shaaban
Production Design
Heba Shaaban
Starring
Heba Shaaban
Featuring
Heba Shaaban
Edited By
Heba Shaaban
THE END 