'Extinction rate' diaporamas de présentation

ENVIRONMENTAL SCIENCE

1.2k views • 95 slides

Sustaining Biodiversity: The Species Approach

Sustaining Biodiversity: The Species Approach. Chapter 9. Core Case Study: The Passenger Pigeon: Gone Forever. Once the most numerous bird on earth. In 1858, Passenger Pigeon hunting became a big business. By 1900 they became extinct from over-harvest and habitat loss.

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Chapter 11

Chapter 11. Sustaining Biodiversity: The Species Approach. Chapter Overview Questions. How do biologists estimate extinction rates, and how do human activities affect these rates? Why should we care about protecting wild species? Which human activities endanger wildlife?

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In Class Assignment Biomes Name:___________________

In Class Assignment Biomes Name:___________________. ____________ contains widely scattered clumps of trees such as acacia which are covered with thorns, has warm temps year round, and alternating wet and dry seasons

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Chapter 22 Sustaining Wild Species

Chapter 22 Sustaining Wild Species. Key Concepts. Human effects on biodiversity. Importance of biodiversity. How human activities affect wildlife. Management of wildlife. http:// www.youtube.com/watch?v=OKS4nz6_6Is. The Passenger Pigeon Gone Forever.

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Sustaining Biodiversity: Saving Species and Ecosystem Services

9. Sustaining Biodiversity: Saving Species and Ecosystem Services. Core Case Study: Where Have All the Honeybees Gone?. Bees play a key role in pollination Globally, about one third of the food supply comes from insect-pollinated plants

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Sustaining Biodiversity: The Species Approach

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Sustaining Biodiversity: The Species Approach

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EXTINCTION

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Sustaining Biodiversity: The Species Approach

Sustaining Biodiversity: The Species Approach. Chapter 9. Core Case Study: The Passenger Pigeon: Gone Forever. Once the most numerous bird on earth. In 1858, Passenger Pigeon hunting became a big business. By 1900 they became extinct from over-harvest and habitat loss.

844 views • 39 slides

EXTINCTION

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EXTINCTION

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Extinction Is Forever

Extinction Is Forever. Extinction Is Forever. Passenger pigeon was hunted to extinction by 1900 when a young boy in Ohio killed the last in the wild In 1813, John James Aududon saw a huge flock that took 3 days to pass and was so dense it darkened the sky

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Figure 13.1 Diagrammatic reconstruction of the history of continental drift.

Figure 13.1 Diagrammatic reconstruction of the history of continental drift.

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Evidence for Evolution

Evidence for Evolution. Species Numbers. Exploration brought increased realization of the ENORMOUS NUMBER OF SPECIES in the world. Fossil Evidence. Similar fossils were found in geographically isolated locations. Fossil Evidence. Fossil Evidence.

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Impact of Climate Change on Biodiversity

Impact of Climate Change on Biodiversity. P.R. Sinha Country Representative, IUCN India priya.sinha@iucn.org. Species Extinction in Past. Five Major Extinctions Documented ( Jack Sepkoski & David M Raup ) Seventeen Lesser Extinctions. INTERNATIONAL UNION OF CONSERVATION OF NATURE.

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Lyme Disease

Lyme Disease. Borrelia burgdorferi. Species Area Curves. S = CA Z. (log S) = Z (log A) + (log C). From: Gotelli, N. J. 1995. A primer of ecology. Sunderland, MA: Sinauer Assoc. 1-206 p. Species Loss Due to Deforestation. Based on empirical results, z typically between 0.15 and 0.35. before.

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Chapter 11

Chapter 11. Sustaining Biodiversity: The Species Approach. Species Extinction. Local extinction : Ecological extinction : Biological extinction : Endangered Species: Threatened Species : 30,000 plants and animals are endangered or threatened. Species Extinction .

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Extinction: past, present, future

Extinction: past, present, future. Gwen Raitt. BCB 705: Biodiversity. What is Extinction?. Dark green font Arial at least 18 point this colour is 70 70 0

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Biodiversity And Conservation

Biodiversity And Conservation. Diversity. Biodiversity: The number of species in a given area Genetic diversity: The variety of genes in the gene pool Ecosystem diversity: The variety of ecosystems in the biosphere. Threats to Biodiversity.

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