Presentation on theme: "A Study into the Factors Effecting Bee Mortality"— Presentation transcript
Slide1
A Study into the Factors Effecting Bee Mortality
By Rosie Flett
Slide2
Overview of presentation
Introduction
Colony Collapse Disorder (CCD)
Diseases and Parasites
Industrial Agriculture
Climate Change
Discussion
Slide3
Introduction
Bees help pollinate 75% of all crops and 33% of food crops (Tirado et al., 2013)
Bee population decrease of 59% from 1985 to 2005 (Potts et al., 2010)
Commercial crop production is becoming increasingly dependent on managed pollinators, the majority being
honeybees (Potts et al., 2010)
Aims -Understand the main factors causing bee population decline -Understand how human activity has contributed to this decline -Understand how we can support bee populations
Slide4
Colony Collapse Disorder (CCD)
CCD is diagnosed when the hive is lacking adult worker bees (
vanEngelsdorp
et al., 2009)
3 main suspects; diseases and parasites, industrial agriculture and climate change (Tirado et al,. 2013
).
Slide5
Diseases and Parasites
Varroa mite - main cause for the colony losses in Europe. Varroa mites have spread almost worldwide.
(
Rosenkranz
, 2010)
Nosema, parasitic fungal pathogen living in the digestive system of the bees. (Fera, 2017)Israeli Acute Paralysis Virus (IAPV) is common in honey bee populations and strongly effects adult worker bees (de Miranda et al., 2010).
Varroa
mite on a bee
Slide6
Industrial Agriculture
Globally increasing pesticide
levels
(
Köhler
and Triebskorn, 2013)Neonicotioids are systemic insecticides proven to effect bee populations(Tirado et al., 2013) Neonicotinoids observed effects on
bees (Tirado et al., 2013): -Impairment of navigating ability-Impairment of learning-Increased mortality,-Dysfunctional development
Slide7
Climate Change
Climate change affects
temperature and bees have
been observed moving upwards to colder temperatures (
Ploquin
et al., 2013), Decreasing the amount of ideal bee habitat, adding even more strain to colonies (Goulson et al., 2015).
Slide8
Conclusion
Bees are a crucial part of our ecosystem. (Tirado et al., 2013),
CCD has unknown causes and is occurring at uncontrollable rates (Williams et al., 2010).
Many suggest that CCD is a combination of many factors (Chen et al., 2014).
Modern agriculture can indirectly effect and weaken bees, allowing infections and parasites to kill (
Goulson et al., 2015)
Slide9
Thank you for watching. Any questions?
Slide10
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Slide11
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