'Extinction rates' presentation slideshows

Sustaining Biodiversity: The Species Approach

1.04k views • 77 slides

Patterns on islands

867 views • 72 slides

Patterns on islands

843 views • 72 slides

Chapter 12

Chapter 12. Sustaining Biodiversity: The Species Approach. SPECIES EXTINCTION. Species can become extinct: ________ : A species is no longer found in an area it once inhabited but is still found elsewhere in the world.

1.08k views • 58 slides

Islands

Islands Islands can serve almost as a laboratory for the study of biogeography. The biota of an island is simpler than that of a continental area, and the interactions are easier to understand. Islands are often depauperate in species numbers relative to mainland areas.

1.19k views • 53 slides

Islands

Islands. Islands can serve almost as a laboratory for the study of biogeography. The biota of an island is simpler than that of a continental area, and the interactions are easier to understand. Islands are often depauperate in species numbers relative to mainland areas.

1.08k views • 53 slides

Sustaining Biodiversity: The Species Approach

Sustaining Biodiversity: The Species Approach. Chapter 9 J. Stewart- Presenter. Once most common bird in N. America - Extinct in 1914 Humans were responsible (huge flocks, narrow colonies = easy to kill- stool pigeons) Why they were hunted (food, feathers, fertilizer) Extinction.

560 views • 35 slides

Sustaining Biodiversity: The Species Approach

Sustaining Biodiversity: The Species Approach. Chapter 8. Once most common bird in N. America - Extinct in 1914 Humans were responsible (huge flocks, narrow colonies = easy to kill- stool pigeons) Why they were hunted (food, feathers, fertilizer) Extinction.

515 views • 35 slides

Class Webpage

Class Webpage. http://online.sfsu.edu/~jrblair/biol170/biol170syl.htm. What is an animal?. While there are exceptions, five criteria distinguish animals from other life forms. Animals are multicellular, heterotrophic, eucaryotes.

446 views • 34 slides

SPECIES AT-RISK

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The Loss of Biodiversity

The Loss of Biodiversity. ESC 556 Week 9. Causes and Consequences. Prominent species & causes Endangered Species Overexploitation by humans. Causes and Consequences. Obscure species & causes Habitat destruction Plants & insects Loss of free services Loss of genetic diversity.

2.74k views • 23 slides

Cultural dimensions of wildlife in the Anthropocene

Cultural dimensions of wildlife in the Anthropocene. How many species?. 5 - 9 million non-bacterial species estimated Some estimates have ranged up to 100 million because of potential insect diversity 1.5 million cataloged, but many are only descriptions or a museum specimen

438 views • 23 slides

KEY CONCEPT Biology is the study of all forms of life.

KEY CONCEPT Biology is the study of all forms of life. biosphere = everywhere life exists. Earth is home to an incredible diversity of life. Diversity = a wide variety of things. Bio diversity means the wide variety of living creatures on the planet.

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Global Biodiversity

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Community Succession

Community Succession. Universal process of directional change in vegetation during ecological time. Recognized by a progressive change in the species composition of the community

503 views • 20 slides

Community Succession

Community Succession. Universal process of directional change in vegetation during ecological time. Recognized by a progressive change in the species composition of the community

225 views • 20 slides

HUMAN IMPACT

HUMAN IMPACT. 1. Biodiversity is the variety of life in an area that is determined by the number of different species in that area. 2. Biodiversity increases the stability of an ecosystem and contributes to the health of the biosphere. The Importance of Biodiversity.

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Lecture 12 Community Structure And Biodiversity

Lecture 12 Community Structure And Biodiversity. Mainland & Marine patterns. Number of coexisting species is highest in the tropics . The number systematically declines from the equator to the poles. What are the causes?

211 views • 2 slides