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Minimum Viable Population

Minimum Viable Population. The smallest population for a species which can be expected to survive for a long time Many factors effect MVP – the study of those factors is often called Population Viability Analysis – or Population Vulnerability Analysis – or PVA. English Skylark.

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Minimum Viable Population

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  1. Minimum Viable Population • The smallest population for a species which can be expected to survive for a long time • Many factors effect MVP – the study of those factors is often called Population Viability Analysis – or Population Vulnerability Analysis – or PVA

  2. English Skylark

  3. Metapopulations

  4. Metapopulation • A series of small, separate populations united together by dispersal • Thus even if all members of one population go extinct, other populations survive and dispersal from survivor populations can recolonize the area – a rescue effect

  5. Metapopulation Dynamics

  6. Bay Checkerspot Butterfly

  7. Population dynamics of Bay Checkerspot Butterfly

  8. Types of Metapopulations

  9. Habitat Loss Orange County, California

  10. Habitat Loss • Habitat is the physical and biological environment used by an individual, a population or a species • Habitat degradation is the process by which habitat quality for a given species is diminished • Habitat loss occurs when the habitat quality for a given species is so low that the environment can no longer support the species

  11. Ecosystem Loss • Ecosystem is a group of organisms and their physical environment • Ecosystem degradation occurs when alterations to an ecosystem degrade or destroy habitat for many of the species that constitute the ecosystem • Ecosystem loss occurs when the changes to an ecosystem are so great and so many species typical of that ecosystem (especially dominant species) are lost that the ecosystem switches from one type to another

  12. Processes that degrade habitat and ecosystems • Contamination • Human built structures • Soil erosion • Changing fire regimes • Human consumption of water

  13. Copper Basin, Tennessee

  14. Copper Basin, Tennessee 1926 1939

  15. Copper Basin today

  16. Copper Basin – Superfund site

  17. Restoration of Burra Burra Pit, Copper Basin Mid-1990s Mid 2000s

  18. Copper mine tailings, Butte, Montana – largest Superfund site in America

  19. Mine tailings outskirts of Sudbury, Ontario

  20. Restoration of Sudbury

  21. Air pollution – Mexico City

  22. Extent of Acid Precipitation

  23. Rhine River Basin

  24. Healthy Coral Reef

  25. Dying Coral Reefs Bleached coral Silted out reef

  26. DDT use in 1950s

  27. DDT in Zimbabwe

  28. Thin Egg Shells from DDT

  29. Human Built Structures

  30. Pacific or CaliforniaFire-bellied Newt

  31. Pacific or California Fire-bellied Newt –don’t try this at home w/o washing hands

  32. Tilden Park, Berkeley, CA

  33. Snake migration in Shawnee Copperhead

  34. Dandelion dispersal – along roads and railroads

  35. Bonneville Dam, Columbia River, Oregon

  36. Fish Ladders

  37. The Dingo – Canis familiarus dingo

  38. Dingo Fence – The World’s Longest – New South Wales

  39. Erosion and loss of habitat on Round Island, Mauritius

  40. Smokey the bear - 1953

  41. Smokey the Bear - 1960

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