My research approach for my dissertation combines field observations, experiments, and genetic techniques using Solidago altissima as a model system. In 2005, we established a common garden containing monocultures of 21 different goldenrod genotypes in field plots in an old-field ecosystem in east Tennessee. In 1 m plots, we created treatments of either 1, 3, 6, or 12 genotypes.
In 2006, we initiated a decomposition project manipulating goldenrod leaf litter to address the influences of genotypic diversity on litter communities and ecosystem processes. We use 90 large home-made Tullgren funnels to extract micro-arthropods for 72 hours at a time.
Aphids differentially attack different goldenrod genotypes. This genotype is particularly susceptible, which also attracts predatory lady beetles.
Out at the field site with Jenn Rudgers and Ken Whitney (Rice University). They do great research and give lots of good advice to grad students. Check them out. http://www.ruf.rice.edu/~jrudgers/
The fieldsite in March 2006, before ramets began shooting up.
Bunchgalls commonly attack goldenrod but also act as ecosystem engineers by forming leaf rosettes for a host of secondary-user species, particularly spiders. Like with aphids, we find attack of host plants by these galls to very genotype specific.
Litterbags full of goldernod leaves set in the field and are picked up at set intervals. We process these bags to measure litter mass loss and nutrient mineralization.
