Una s¨²plica por las abejas - Dennis van Engelsdorp
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This document discusses the decline of bee populations and other pollinators. It outlines the symptoms of Colony Collapse Disorder (CCD) in bees and reviews proposed causes such as pathogens, pesticides, and environmental stress. Studies found higher pathogen levels and pesticide residues in CCD colonies. The document advocates for protecting pollinators through practices like maintaining meadows instead of lawns and eating local honey.
Una s¨²plica por las abejas - Dennis van Engelsdorp
- 1. A Plea For Bees and other Pollinators Dennis vanEngelsdorp
- 12. Symptoms?of?CCD Symptoms of CCD ?Absence of dead bees Absence ?When bees present ?Appear young ?Queen right ?Insufficient brood cover I ffi i t b d vanEngelsdorp, et. al (2009) PLOSone ?Lack of/delayed robbing or common Williams, Tarpy, vanEngelsdorp et. al (2010) comb pests BioEssays
- 15. Proposed Causes?of?CCD C. V ? Cell?Phones C ll Ph Vorsek ? Rapture ? Terrorist ? Russian?plot Russian plot
- 16. Top Lines of Investigation Top?Lines?of?Investigation 1. Pathogen 1. New 2. Newly evolved Newly?evolved 2. Pesticide 1. Beekeeper?applied 2. 2 Farmer?applied li d 3. Environmental?stress 1. Nutrition 2. Genetics 3. Management
- 17. Sample?Collection p Yard?Type Colony type Strong N 9 Control Weak 6 Strong 24 Weak 30 CCD Dead 14 Recovering 6 Package?added 8 Package installed 3
- 18. CCD vs. non-CCD yards M t lit 20 8 % vs 8 1% Mortality 20.8 8.1% Odds Ratio: weak-weak 205 dead- weak weak 205, dead dead 109 vanEngelsdorp, et. al (2009) PLOSone
- 19. vanEngelsdorp
- 20. Higher levels in CCD Non-CCD Non CCD colonies Pathogens ?DWV, KBV , ?2.6 X more likely to have both nosema species ?~2 X more likely to be infected with 3 or more viruses CCD vanEngelsdorp, et. al (2009) PLOSone
- 21. Non-CCD Non CCD CCD Higher levels in control colonies Pesticides ?Coumaphos ?wax and brood wax ?Esfenvalerate ?Wax ?Honey bee tracheal mites vanEngelsdorp, et. al (2009) PLOSone
- 22. CLASSIFICATION AND REGRESSION TREE ANALYSIS N = 91 56.7% 56 7% CCD Coumaphos in bee brood ¡Ü 66 ppb oumaphos in bee brood > 66 ppb C N = 58 N = 33 67.2% CCD 36.4% CCD Fluctuating asymmetry Fluctuating asymmetry ¡Ü 1878.5 > 1878.5 N = 40 N = 18 85.0% CCD 27.8% CCD Tree Sensitivity = 65 % Tree Specificity = 87 % vanEngelsdorp, et. al (2010) J. Ec.Ent
- 23. Bees?are?in?Trouble Bees are in Trouble
- 25. Varroa?Mites Varroa Mites M F
- 35. Bees?are?Dying y g How?to?Care?
- 37. Honey?Hunting y g ? Still?practiced?today ¨C Notably?A.?dorsata?
- 44. Make meadows not lawns
- 45. The Green Lawn
- 47. Thank?You Thank You Humboldt?Institute Humboldt Institute ? Pollinator.org ? X Xereces.org