biodiversity ppt(science)

8/13/2019 Biodiversity PPT(Science)

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Biological diversity - or biodiversity - is a term we use to desvariety of life on Earth. It refers to the wide variety of ecosy

living organisms: animals, plants, their habitats and their ge

Biodiversity is the foundation of life on Earth. It is crucial fofunctioning of ecosystems which provide us with products awithout which we couldnt live. Oxygen, food, fresh water, fmedicines, shelter, protection from storms and floods, stablrecreation - all have their source in nature and healthy ecosbiodiversity gives us much more than this. We depend on it security and health; it strongly affects our social relations anfreedom and choice.


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The number and variety of species in an ecosystem c

that ecosystems stability, productivity, and value to

Sometimes the presence or absence of a single keyst

like the sea otter, can completely change the nature

ecosystem. When the otter population falls, the pop

favorite prey, sea urchins, goes up. Population increa

urchins cause a dramatic decrease in the population

the sea urchins favorite food.


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Biodiversity is everywhere. It occurs both on land and in w

high altitudes to deep ocean trenches and it includes all o

from microscopic bacteria to more complex plants. Altho

tools and data sources have been developed, biodiversity

difficult to measure precisely. According to the Millenium

Assessment, the total number of species on Earth ranges

30 million and only 1.72 million species have been form

But we do not need precise figures and answers to deviseunderstanding of where biodiversity is, how it is changing

and time, what are the drivers responsible for this change

consequences for ecosystem services and human well-be

available response options.


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Why is biodiversity important?Why is biodiversity important?Biodiversitys benefits to society include

contributions to medicine and

agriculture, and the provision of ecosystand services.

Biological diversity, or biodiversity, is the

all the genetically based


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biodiversity ppt(science)

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