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Arthropod Diversity and Cover Crops

Arthropod Diversity and Cover Crops. By Jeffrey Taylor August 11,2003 Pennsylvania State University. Arrival of the Study. Land owner Steve Groff is interested to see what the benefits of long-term cover cropping are. Hypothesis.

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Arthropod Diversity and Cover Crops

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  1. Arthropod Diversity and Cover Crops By Jeffrey Taylor August 11,2003 Pennsylvania State University

  2. Arrival of the Study • Land owner Steve Groff is interested to see what the benefits of long-term cover cropping are

  3. Hypothesis • Fields with the least disturbance and a cover crop would have the greatest diversity and abundance of arthropods

  4. Study Area Most Disturbed -Long term no-till ~20 years Least Disturbed -Pasture and then 7 years in no-till www.oznet.ksu.edu/notill/ images/nf_corninmay2.jpg www.countryside-management.org.uk/ heathland/grazing.htm

  5. Study Area • Sixteen plots • 4 Long term no-till with a cover crop • 4 Long term no-till without a cover crop • 4 Short term no-till with a cover crop • 4 Short term no-till without a cover crop

  6. Study Area

  7. Study Area • 2003: Field corn in a rye cover crop • 2002: Soybeans in a rye cover crop http://www.sdnotill.com/membersh.htm

  8. Methods of Collection Pitfall Trap Pitfall Trap Catches surface insects Tullgren Traps Catches soil insects

  9. Methods of Calculation • Abundance -Addition of all insects caught • Diversity -Shannon index -D=-Σpilogpi

  10. Factors • Diversity • Abundance • Herbivore • Predators • Detritivores

  11. Collection Dates Tullgren: July 15, 2003 July 28, 2003 Pitfall: July 15-17, 2003 July 28-30, 2003

  12. What was Found

  13. Orthoptera-crickets Hymenoptera-ants Isopoda-pill bugs Araneae-spiders In The Pitfalls Cricket Ant Pill bug

  14. In the Tullgren Traps • Mites • Collembola-springtails • Diptera-flies springtail Mesostigmatid mite Mesostigmatid mite

  15. Results a a treatments do not differ significantly at p> 0.05

  16. Results a a a a a a b b b b a, b indicate treatments that differ significantly at p< 0.05

  17. Results

  18. Conclusion • Only the tullgren traps were studied in-depth • Population may be migrating between plots • Abundance of Arthropods was greater in the long term no-till fields soils.usda.gov/sqi/SoilBiology/ATLAS103_LR.jpg

  19. Conclusion • Michael Hutson studied that diversity may decrease as fertility of soil increases -competitors completely dominate fertile environments http://www.markscollection.com/christian/images/eden_riveroflife.jpg

  20. www.stitchability.co.uk/ permin_cross_stitch_samplers_7.htm

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