Flowering phenology data from summer 2013. This version contains data collected from 7 July, 2013 to 26 August, 2013. PhenDataMASTERcsv_28-Aug-2013.csv
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I defended my thesis on May 16th, presenting the results of my research on the hygroscopic motion of big bluestem and indian grass. I've attached the presentation to this post, though the presentation is a bit light on text. I'm putting together a section on my website with more text, which I'll link when it's ready.
Now that the vast majority of Echinacea are finished flowering (except for the populations at Staffanson and one lonely plant at Northwest of Landfill), I've started piecing together a master datasheet with the first and last day of flowering for every Echinacea head that I have been studying. Please let me know if you have any comments or recommendations for statistical analysis, possible comparisons to other data sets, or better organizational methods!
I couldn't make the Midwest Ecology and Evolution Conference, but I made a poster. It describes preliminary results from an aphid addition/exclusion experiment I conducted in the summer of 2011. Specifically, it examines the question of whether aphid infestation influences the presence of leaf damage by other herbivores.
Look at them go! For the first few seconds of the video, anway,
My first goal of the crossing attempt was to determine the rate of floret emergence. The second major challenge was to isolate individual florets so that I could control pollination. I first found suitable plants without any emerged florets, then covered the terminal spike with a mesh bag that was secured to the stem using a twist-tie. Stems were supported by tying them loosely to a pin-flag. Then, I marked the pin-flag with labeled fluorescent orange flagging. I followed this procedure for each of ten haphazardly selected plants at the Nice Island remnant.
To examine the rate of floret emergence, I visited plants every two to three days. The first burst of flowering occurred during hot days in mid-July. Following the first 2-3 rows of opened florets, I secured a length of embroidery floss around the spike to demarcate emerged florets from the still closed floral buds. I then immediately replaced the mesh bags following belt application. I determined that florets opened at the rate of one to two rows per day, progressing from the bottom to the top of the spike.
This species is primarily outcrossing. Pollination was attempted using haphazardly collected pollen at the same site with fresh toothpicks. Pollen was stored into new microfuge tubes in the freezer. I later applied this random donor pollen to floret stigmas at ten plants.
This crossing protocol had some challenges. First, the close organization of florets on the inflorescence made individual crosses impractical. Second, a relatively delicate stem did not allow for snug closure of the mesh bag and twist-tie, resulting in insects inside the mesh. Third, the size of the mesh (aperture size) was such that most stamens poked out through the mesh. It was concluded that crosses of this species will require a different approach.
For pictures, visit the Dalea page at The Echinacea Project
We accomplished a lot, even thought the weather was super hot! We even started at 7 am to try to beat the heat.
Monday, (July 18, 2011) was amazing in two different ways. The temperature was in the nineties, but the heat index was over 100 F. We worked in the morning, but by 10 am it was heating up. Because of the humidity, our clothes were soaked through by the end of the day. We measured plants in the common garden on Monday afternoon, and helped Katherine set up cages for her aphid experiments.
Tuesday and Wednesday, we decided not to work outside during the afternoon, so we did morning field work, and then spent time updating the website and computer work during the afternoon.
Here are a few photos of our projects.
5. Josh is helping other groups and helping with the main projects, because he's waiting for his Big Bluestem and Indian Grass to grow for his experiment (sorry, no photo).
8. Nicholas is just about to finish all his compatibility experiments between Echinacea angustifolia and Echinacea pallida. To do cross pollination experiments, he first paints the bracts that subtend the styles he will pollinate. Aqua is a easy color to recognize on the bracts.
On Thursday and Friday, we were able to do more fieldwork in the common garden, even in the afternoon (common garden measurements and phenology).
We're off to a great start this season. We've made good progress on our ongoing projects and folks are well on their way with their independent projects. We had better keep moving because the earliest plant in the Common Garden started flowering on the 21st!
Here's a list of independent projects for Summer 2010:
- Laura: Phenology of midsummer prairie plants
- Josh: Movement of Stipa spartea seeds
- Lauren & Hillary: Performance of aphids on Echinacea and other plants
- Katie: Efficiency of common Echincaea pollinators
- Ian: Flowering phenology and mating compatibility
- Greg: Breeding systems in the Asteraceae
- Gretel: Reciprocal pollen interference between Heliopsis and Echinacea
I attached a pdf file of our ongoing projects.
Lots of plans for this week! Here are some highlights.
This week we will start systematic observations of Echinacea flowering phenology in the CG experiment. We want to know the first and last day of flowering for every head of every Echinacea plant in the CG. The main event early in the week will be to put a twist tie on every head that looks like it will flower. We will also put a flag near every flowering plant with its location on the flag. We have to get the locations (plant ids) correct and get it into a database. As of Sunday, four plants in the CG had started to flower, how many left to go? We will also record flowering phenology at Staffanson Prairie Preserve. We will observe many fewer plants, but it's a long walk.
Under the supervision of DR, we will spend ~1h looking for more spittle masses on Ea in the CG.
Jennifer and Diedre are coming from IL this Sunday and will stay for the week. They will help set up the phenology flags. They also plan to collect tissue from plants in several remnants to do a population genetic study using microsatellites (DNA markers).
Daniel and Amy will make a plan for searching for aphids and juvenile plants in remnants.
Caroline will fill us in on her plans.
The competition of pollinators crew (M "floral neighborhoods" J, A "bee's knees" G, K "style" G, A "the experimenter" H, and G "pollen from the source" D) will plan and practice for their project. Here are some things they will do...
Mimi: characterize floral neighborhoods
Amanda: catch bees, get pollen on slide
Kate: catch styles, get pollen on slide
Allegra: choose plants for experiment
Greg: order digital microscope cam & collect pollen (from the source)
GPS (maybe): Daniel & Amy.
What are we going to do about that tripod?
Less than 10% of the heads that we think will flower this season had started flowering as of Sunday. Flowering is so late this year! We'll walk through the Garden systematically tomorrow (Tuesday) to see what's new. It's possible one head (49.33 946.33 grn) will be done flowering tomorrow.
There's always something new and exciting going on when Team Echinacea is in full swing. After we all pitch in to assess flowering phenology tomorrow, Amy will work on her large-scale crossing experiment that requires erecting pollinator exclusion cages, collecting pollen & hand crossing. The fun doesn't end there. We are tiling and plumbing the Hjelm House, photographing floral development on Echinacea heads, measuring plants at the Hegg Lake CG and the main CG, taking ladder-high aerial photography of flowering plants in the prairie remnants, and chasing bee pollinators in the CG. And that's just tomorrow!
Here's a list of ideas for independent or group projects that we discussed today.
1. Improve procedure for mapping seedlings in remnants.
2. Investigate new aphid biology: distribution, behavior, ant associates, et cetera.
3. Investigate biology and behavior of native bees:
flight distances in CG
pollination behavior Echinacea in CG
distribution with next boxes
4. Do "Time lapse" photography of Echinacea heads to visualize floral development.
5. Pollen collection from plants to develop identification key (with pollen collection from bees to assess generalization/specialization.
6. Quantify plant species richness in remnants, experimental plots, local preserves.
7. Map distribution of Echinacea's co flowering species (Thistles, sweet clover, Coreopsis)
Kite or pole aerial photography
8. Collect seed of Stipa spartea or Dalea purpurea for common garden study.
9. There are many more possibilities...
KAP: KAP has not gone so well this summer. We went out to Staffenson last week, in an attempt to at least get a pretty picture to show for our troubles. The idea was also to get before/after photos of the liatris (liatrises? liatri?) blooming. We set up a 10m x 10m square near the boundary between East and West. Alas, due to unstable winds and our failure to bring more than one memory card, we weren't able to take too many pics. And, of those we did take, we only had one (ONE!) with three groundmarkers included and none (NONE!) with all four groundmarkers.
Today we went out again and, despite promising wind predictions, failed to get the camera up.
Team Bee: Amy is analyzing data
Team Video: Due to an encouraging article on BBC about time travel, Colin has decided to wait for this invention rather than watch the 1000 hours right now. He plans on sending back his future self to do the grunt work. Thus, when all video is reviewed, we will know that time travel has been perfected.
Team FA: Leaves and heads, done.
Demography: Going well. Gaining in speed and efficiency. However, many, many sites are left to do. Getting nervous about the end of the summer coming so soon.
Common Garden: FINISHED! Well, just harvesting left.
Hegg Lake: Rechecks c. 1/3 done
Rachel's Sites: Almost done!
This is a link to a sample survey sheet that is used for my research. It includes a list of some of the most common plants found in the prairie fragments.