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Unformatted text preview: e 8-9mo to recover. Polycultures take 5mo to recover Polycultures are more resilient to natural disturbance -In only the most INTENSE disturbance, the monoculture takes the
LONGEST to recover from clipping What is the mechanism?
• Diverse, polycultures are more likely to have
tolerant genotypes that can regrow quickly
– Sampling Effect • Over performance of polycultures also indicate
some interaction between genotypes
– Likely because of different resource uptake strategies
of the genotypes
– More resource strategies more more niches
less less competition -Diff genotypes manipulate diff parts of -Compare to Tilman's results on species diversity (Slide 4) t he enviro for recovery = less competiton 15
Hughes and Stachowicz, 2011, Journal of Ecology 99: 445 453 -Polyculture have a higher percentage of shoots that sur vive in
a NATURAL disturbance Solidago
(goldenrod) 16 -Sampling Effect: just simply more likely that you will have a genotype that is resistant. If
t he polycult does not have this genotype, it will not recover well. (Compare to potato yield
a nd pathogens)
-IT IS NOT A SAMPLING EFFECT! There is some sort of interaction b/w genotypes!
-This is inferred from the 'e xpectation' result: expectation assumes each genotype is acting
i ndependently. Polycult recovers even faster than this expect rate, therefore it is NOT the
result of sampling effect
http://bugguide.net/node/view/461313 -Animal pollinated
-Sticky pollen that
s ticks to animals,bees
e tc. Galls on plant Rhopalomyia solidagini...
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This document was uploaded on 01/27/2014.
- Winter '14
- Annotated Lecture S