Conservation Biology: Genetic Diversity and Species Diversity of Various Species, Study notes of Biology

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Conservation Biology

Recovered!

Extinct!

Not so fast!

Genetic Diversity

species region/area covered number of loci

polymorphic locia expected heterozygosity wandering Albatross Indian and Atlantic Oceans

Amsterdam Albatross Amsterdam island (Indian Ocean)

snow goose Bylot Island 191 17 0. willow flycatcher Southwestern United States

b horned grebe Yukon, Québec, Iceland 96 29.2 n.a.

Species Diversity

• ~1.5 million

different species

have been

identified thus far

• about half are

insects

• New species are

discovered every

year (including

birds).

Insects Flowering Plants Other Arthropods Mollusks Chordates All other animals Protistans Fungi All other plants Prokayotes

Bird Diversity

• Most Bird

species

are

songbirds.

Variation in Passerine

Diversity

Threatened Bird Habitats

http://www.stateofthebirds.org/

Example of Habitat

Destruction

Release of Carbon into

Atmosphere

Carbon Dioxide

Fluctuations

Global Temperature & CO

Levels

Greenhouse Effect

Plant Hardiness Maps

Greenland’s Ice Sheets

Darkest areas

losing 1 meter

thickness of ice

• Exotic Species

• intentional introduction of foreign species

• Starlings, House Sparrows & Rock Pigeons

into North America

• Game Birds
• Several species in Hawaii

• unintentional introduction of exotics

• Brown tree snake to Pacific Islands

(destroyed native bird populations).

Major Threats to

Biodiversity