Biological Diversity on the Planet How many different types of organisms are on Earth?
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Transcript of Biological Diversity on the Planet How many different types of organisms are on Earth?
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Biological Diversity on Biological Diversity on the Planetthe Planet
How many different types of How many different types of organisms are on Earth?organisms are on Earth?
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Biological DiversityBiological Diversity
Refers to all of the different types of Refers to all of the different types of organisms on earthorganisms on earth
Organisms can live on land Organisms can live on land (terrestrial), in water (aquatic) or (terrestrial), in water (aquatic) or underground (subterranean)underground (subterranean)
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What is a species?What is a species?
Group of organisms with the same Group of organisms with the same structures and can reproduce with structures and can reproduce with each othereach other
Scientists estimate there are Scientists estimate there are between 30 and 100 million different between 30 and 100 million different species living todayspecies living today
However, scientists have only However, scientists have only described just over 1.7 million described just over 1.7 million different speciesdifferent species
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Insects, Centipedes and MillipedesInsects, Centipedes and Millipedes
963 000 different 963 000 different species (55.8% of species (55.8% of the world’s total the world’s total number of species)number of species)
Includes Includes mosquitoes, mosquitoes, beetles, flies, ants, beetles, flies, ants, etc.etc.
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PlantsPlants
270 000 different 270 000 different species (15.6% of species (15.6% of the world’s total the world’s total number of species)number of species)
Includes all plants, Includes all plants, trees, ferns, trees, ferns, flowers, etc.flowers, etc.
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Fungi and LichensFungi and Lichens
100 000 different 100 000 different species (5.79% of species (5.79% of the world’s total the world’s total number of species)number of species)
Includes Includes mushrooms, mushrooms, lichens (fungi and lichens (fungi and algae combined) algae combined) and othersand others
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Protozoans and AlgaeProtozoans and Algae
80 000 different 80 000 different species (4.63% of species (4.63% of the world’s total the world’s total number of species)number of species)
Includes amoeba, Includes amoeba, paramecium, paramecium, euglena and all euglena and all types of algaetypes of algae
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Spiders and ScorpionsSpiders and Scorpions
75 000 different 75 000 different species (4.35% of species (4.35% of the world’s total the world’s total number of species)number of species)
Includes all Includes all spiders, tarantulas, spiders, tarantulas, and scorpionsand scorpions
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MollusksMollusks
70 000 different 70 000 different species (4.06% of species (4.06% of the world’s total the world’s total number of species)number of species)
Snails, slugs, Snails, slugs, clams, oysters, clams, oysters, mussels, scallops, mussels, scallops, squid, octopi etc.squid, octopi etc.
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CrustaceansCrustaceans
40 000 different 40 000 different species (2.32% of species (2.32% of the world’s total the world’s total number of species)number of species)
Includes shrimp, Includes shrimp, lobsters, crabs, etc.lobsters, crabs, etc.
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RoundwormsRoundworms
25 000 different 25 000 different species (1.45% of species (1.45% of the world’s total the world’s total number of species)number of species)
Common intestinal Common intestinal parasite of pets, parasite of pets, hookworm, hookworm, pinworm and pinworm and trichinellatrichinella
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FishFish
22 000 different 22 000 different species (1.27% of species (1.27% of the world’s total the world’s total number of species)number of species)
Includes all fish Includes all fish such as salmon, such as salmon, trout, bass, trout, bass, marlins, sharks, marlins, sharks, stingrays, etc.stingrays, etc.
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FlatwormsFlatworms
20 000 different 20 000 different species (1.16% of species (1.16% of the world’s total the world’s total number of species)number of species)
Group including Group including flatworms called flatworms called platyhelminthesplatyhelminthes
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Earthworms and LeechesEarthworms and Leeches
12 000 different 12 000 different species (0.70% of species (0.70% of the world’s total the world’s total number of species)number of species)
Just as the group Just as the group says, includes says, includes earthworms and earthworms and leechesleeches
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Reptiles and AmphibiansReptiles and Amphibians
10 500 different 10 500 different species (0.61% of species (0.61% of the world’s total the world’s total number of species)number of species)
Includes frogs, Includes frogs, toads, crocodiles, toads, crocodiles, iguanas, alligators, iguanas, alligators, etc.etc.
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Jellyfish, Corals and AnemonesJellyfish, Corals and Anemones
10 000 different 10 000 different species (0.58% of species (0.58% of the world’s total the world’s total number of species)number of species)
Includes the above Includes the above species – jellyfish, species – jellyfish, corals and corals and anemonesanemones
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SpongesSponges
10 000 different 10 000 different species (0.58% of species (0.58% of the world’s total the world’s total number of species)number of species)
Group including Group including the sponges is the sponges is called called PoriferaPorifera
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BirdsBirds
10 000 different 10 000 different species (0.58% of species (0.58% of the world’s total the world’s total number of species)number of species)
Includes eagles, Includes eagles, hawks, albatrosses, hawks, albatrosses, robins, sparrows, robins, sparrows, etc.etc.
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MammalsMammals
4 500 different 4 500 different species (0.26% of species (0.26% of the world’s total the world’s total number of species)number of species)
Includes bears, Includes bears, monkeys, whales, monkeys, whales, tigers, etc.tigers, etc.
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BacteriaBacteria
4 000 different 4 000 different species (0.23% of species (0.23% of the world’s total the world’s total number of species)number of species)
Found everywhere, Found everywhere, cause many cause many diseases and diseases and illnesses in other illnesses in other organismsorganisms
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Biological Diversity on Earth
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Group of Organisms
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Biological Diversity on Earth Insects
Plants
Fungi and Lichens
Protozoans and Algae
Spiders and Scorpions
Mollusks
Crustaceans
Roundworms
Fish
Flatworms
Earthworms and Leeches
Reptiles and Amphibians
J ellyfish, Corals and Anemones
Sponges
Birds
Mammals
Bacteria
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Species DistributionSpecies Distribution
There are many more species located near There are many more species located near the equator (particularly in the rainforests)the equator (particularly in the rainforests)
As you move further north or further south As you move further north or further south from the equator, the number of species from the equator, the number of species decline – see example belowdecline – see example below• Species of snakes in Mexico – 293Species of snakes in Mexico – 293• Species of snakes in US – 126Species of snakes in US – 126• Species of snakes in Canada - 22Species of snakes in Canada - 22