Hello all! A lot has happened since my last post, so here is a brief update!

After returning to school with my phenology data and experimental seed heads in the fall of 2011, I began work on my senior thesis using that data as a foundation. In April of this year I defended my thesis, “Flowering Phenology and Seed Set in Fragmented Populations of the Prairie Plant Echinacea angustifolia” and was awarded Distinction by my committee! Stuart and I continued to work on my data after my defense and are planning to continue the project and potentially incorporate data from this summer in the hopes of publishing it! Here are some of the very interesting results that we’ve gotten so far:

> aggregate(ss ~ nndist + pdtime, data = mm, mean)
nndist pdtime ss
1 far early 0.1637403
2 near early 0.2690535
3 far late 0.2947009

4 near late 0.1802392

We found that there’s a relationship between seed set (ss), peak flowering date (pdtime), AND distance to the 6th nearest neighbor (nndist). Seed set was higher in plants that had a combination of close 6th nearest neighbor (near) and early peak flowering date or far 6th nearest neighbor (far) and late flowering date. Very interesting!
(table is categorical and matches glm model which looks at pd & nn6 as continuous)

If anyone has any questions, is interested in continuing this exciting project this summer, or would like a copy of my thesis, feel free to contact me! (Amber Zahler at


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