Everglades Presentation Final

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You\'ve got Snail - summary presentation by students

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Everglades Presentation Final

  1. 1. Everglades Trip<br />You’ve got<br /> SNAIL<br />Recent invasion of the Everglades by Pomacea insularum <br />Matthew Trawick<br />Alexis Kropf<br />Vanessa Toro<br />
  2. 2. <ul><li>P. insularum & native macrophytes
  3. 3. P. paludosa& Endangered predators
  4. 4. Federallocal interest
  5. 5. INVASIVE SPECIES
  6. 6. THREATS of EIS
  7. 7. CONTROL EFFORTS
  8. 8. P. insularum & exotic macrophytes
  9. 9. Armand Bayou
  10. 10. Research</li></li></ul><li>What is an EIS?<br /><ul><li>Invasive
  11. 11. Exotic
  12. 12. Impacts
  13. 13. Economic
  14. 14. Ecological </li></li></ul><li>Snails…Where did they come from?<br />
  15. 15. We’ve Got Snail<br />
  16. 16. Why eggs?<br /><ul><li>Egg stage bottleneck to adult stage
  17. 17. Vibrant colors
  18. 18. Laid on emergent vegetation
  19. 19. Species identification
  20. 20. More accessible than snails</li></ul>From Rawlings et al. 2007<br />
  21. 21. Predicting Molluscan Invasions<br />Fecundity of Pomacea canaliculata<br />Keller et al. 2007<br />
  22. 22. - Scattered distribution - Dispersed distribution<br />-Exotic oviposition preference -Native oviposition preference <br />- Introduced 2002 - Introduced 2005<br />X2 = 12.5<br />p&lt;0.001<br />
  23. 23. Where were we? Where were the snails?<br />Impoundments<br />?<br />
  24. 24. <ul><li>P. insularum & native macrophytes
  25. 25. P. paludosa& Endangered predators
  26. 26. Federallocal interest
  27. 27. INVASIVE SPECIES
  28. 28. THREATS of EIS
  29. 29. CONTROL EFFORTS
  30. 30. P. insularum & exotic macrophytes
  31. 31. Armand Bayou
  32. 32. Research</li></li></ul><li>Exotic vs. Native<br />P. paludosa(native)<br />Average eggs per clutch <br />10 to 80 <br />Invasive snail in FL<br />~ 1100<br />Intolerant to water stress<br />Density effects (Conner et. al. 2008)<br /><ul><li>P. insularum(exotic)
  33. 33. Average eggs per clutch
  34. 34. 1,626
  35. 35. Tolerant to water stress</li></li></ul><li>
  36. 36.
  37. 37.
  38. 38. Predators<br />Alligators (?)<br />Crayfish- hatchlings <br />? ? ?<br />Limpkin <br />Everglade Snail Kite (endangered)<br />Alligators<br />
  39. 39.
  40. 40. <ul><li>P. insularum & native macrophytes
  41. 41. P. paludosa& Endangered predators
  42. 42. Federallocal interest
  43. 43. INVASIVE SPECIES
  44. 44. THREATS of EIS
  45. 45. CONTROL EFFORTS
  46. 46. P. insularum & exotic macrophytes
  47. 47. Armand Bayou
  48. 48. Research</li></li></ul><li>Management: Local<br /><ul><li>ARM Loxahatchee National Wildlife Refuge
  49. 49. Government funded
  50. 50. Pest Management Plan and Partnerships
  51. 51. Volunteers
  52. 52. Research</li></ul>Armand Bayou Nature Center<br />Private non-profit<br />Informal Research<br />
  53. 53. Management: State<br />Florida Department of Agriculture<br />Florida Fish and Wildlife Conservation Commission <br />Texas Parks and Wildlife Department<br />
  54. 54. Management: National<br />National Park Service<br />Everglades National Park<br />US Department of the Interior<br />US Fish and Wildlife Service<br />National Wildlife Refuge System<br />Balancing management (primary purpose) and recreation (revenue)<br />
  55. 55. Challenges <br />to <br />Snail Removal<br /><ul><li>Varying water levels
  56. 56. Endangered, native species
  57. 57. Urban areas
  58. 58. Pet trade
  59. 59. Ignorance
  60. 60. Connected waterways
  61. 61. Extent of spread
  62. 62. Limited Involvement of governmental institutions</li></li></ul><li>Ongoing Research in the Everglades<br /><ul><li>Basic trapping methods
  63. 63. Density calculation
  64. 64. Exotic versus native densities
  65. 65. Effects of drought
  66. 66. Extermination measures</li></ul>http://snailbusters.files.wordpress.com<br />
  67. 67. Effect of inundation<br />Water stress reduces hatching efficiency in newly laid clutches<br />
  68. 68. Clutch Age and Inundation<br />
  69. 69. Future Research<br />at <br />Southwestern<br />Alexis<br />Correlating egg clutch size with mass (and age) of female snails<br />Ability to age a population<br />Megan<br />Contrasting herbivory resources of varying nutrients<br />Brandon<br />Predation of hatchlings by various predators<br />Olivia<br />Role of ovorubin in reducing egg predation<br />
  70. 70. Got snail?<br />Hopefully not.<br />
  71. 71. Acknowledgements<br />Dr. Burks<br />Southwestern University<br />Jeff Klein<br />Matt Harwell<br />Nate Dorn<br />ARM Loxahatchee Wildlife Refuge<br />Rebecca, Matt, Tiffany<br />Austin Airport Security<br />

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