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Biodiversity: Biodiversity:
Who cares?Who cares?
A B
Which do you like better?Which do you like better?
A B
Which do you like better?Which do you like better?
What do you think biodiversity What do you think biodiversity means?means?
Bio =
BioBiodiversitydiversity
What does “Bio” mean?
BioBiodiversitydiversity
Diversity = Variety
What does “Diversity” mean?
BiodiversityBiodiversity is the is the variety of lifevariety of life on on Earth and the Earth and the essential essential
interdependence of all living thingsinterdependence of all living things
• Scientists have identified more than 2 million species. Tens of millions -- remain unknown
•The tremendous variety of life on Earth is made possible by complex interactions among all living things including microscopic species like algae and mites.
There are 3 components of There are 3 components of biodiversity biodiversity
1.1. Diversity of genesDiversity of genesChihuahuas, beagles, and rottweilers are all dogs—but Chihuahuas, beagles, and rottweilers are all dogs—but
they're not the same because their genes are different.they're not the same because their genes are different.
ChihuahuaChihuahua BeagleBeagle
RottweilersRottweilers
Diversity of speciesDiversity of speciesFor example, monkeys, dragonflies, and For example, monkeys, dragonflies, and meadow beauties are all different species. meadow beauties are all different species.
Saki Monkey Golden Skimmer Meadow Beauty
There are 3 components of There are 3 components of biodiversity biodiversity
Variety of ecosystemsVariety of ecosystemsPrairies, Ponds, and tropical rain forests are all Prairies, Ponds, and tropical rain forests are all ecosystems. Each one is different, with its own set of ecosystems. Each one is different, with its own set of species living in it.species living in it.
Paines Prairie
Hoh Rain Forest
Florida Sand hill Pond
There are 3 components of There are 3 components of biodiversity biodiversity
Which has more biodiversity?Which has more biodiversity?
A B
Which has more biodiversity?Which has more biodiversity?
A B
Biodiversity has Intrinsic Value
Intrinsic Value = Something that has value in and of itself
Why Biodiversity is ImportantWhy Biodiversity is Important
Protects the AtmosphereProtects the Atmosphere Greenhouse effect and amounts of O2 and CO2 in Greenhouse effect and amounts of O2 and CO2 in
the atmosphere are regulated by the diversity of the atmosphere are regulated by the diversity of plant life.plant life.
Agricultural ProductionAgricultural Production Need the many different species of insects and Need the many different species of insects and
birds to pollinate crops.birds to pollinate crops.
Why Biodiversity is ImportantWhy Biodiversity is Important
Stable EcosystemsStable Ecosystems Life processes on earth are intricately connected; Life processes on earth are intricately connected;
damage to one could mean damage to another. damage to one could mean damage to another. Some species are codependent on each other.Some species are codependent on each other.
Ex. 20 different species of fig trees in Panama have a Ex. 20 different species of fig trees in Panama have a different wasp to pollinate each one.different wasp to pollinate each one.
What do we get from What do we get from biodiversity?biodiversity?
OxygenOxygen
FoodFood
Clean WaterClean Water
MedicineMedicine
AestheticsAesthetics
IdeasIdeas
Should we be concerned about Should we be concerned about biodiversity?biodiversity?
What we know:What we know: The Earth is losing species at an alarming rateThe Earth is losing species at an alarming rate
Some scientists estimate that as many as 3 Some scientists estimate that as many as 3 species species per hour are going extinct and 20,000 extinctions occur per hour are going extinct and 20,000 extinctions occur
each year.each year. when species of plants and animals go extinct, many when species of plants and animals go extinct, many
other species are affectedother species are affected. .
How Biodiversity is LostHow Biodiversity is Lost
Destruction of EcosystemsDestruction of Ecosystems DeforestationDeforestation
-loss in living space and culture for certain -loss in living space and culture for certain aboriginal groupsaboriginal groups
-increase global warming-increase global warming
-flooding, landslides, soil erosion, wildfires-flooding, landslides, soil erosion, wildfires DesertificationDesertification
over-cultivation, overgrazing, deforestation, and over-cultivation, overgrazing, deforestation, and inappropriate irrigation techniquesinappropriate irrigation techniques
How Biodiversity is LostHow Biodiversity is Lost
Introduction of New SpeciesIntroduction of New Species Ex. 1960’s elm trees rapidly died in North Ex. 1960’s elm trees rapidly died in North
America as a result of a fungus disease that was America as a result of a fungus disease that was brought here by beetles on a load of European brought here by beetles on a load of European lumber.lumber.
Other Threats to BiodiversityOther Threats to Biodiversity
Habitat destructionHabitat destruction
PollutionPollution
Species IntroductionsSpecies Introductions
Global Climate ChangeGlobal Climate Change
ExploitationExploitation
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