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demo equipment

A list of equipment we need for demo was posted here: https://echinaceaproject.org/wp-content/uploads/2008/08/demography.html

Demography

This is the last week with Team Echinacea this summer. We still have some plants to measure in the common garden experiment and there are still some plants flowering. We’ll get this done! Our main plan this week is to visit plants in the prairie remnants to see if they are alive. Last week we made a good start, but got rained out on Friday and the previous Monday (over 3″ of rain).

We’ve been to 4 remnant Echinacea populations and refound the seedlings that we identified & mapped in May or June. We have 8 remnants to visit this week. Our maps have worked quite well–we have found almost all of the locations and the majority of seedlings were still alive.

We also have to map the new flowering plants in our remnants and note which old plants are flowering this year. That’s a big job and we are making progress. We won’t finish all the sites, so we’ll have to come back this fall. But I hope we can finish up all of the big sites.

Assessing the survival and reproduction of Echinacea plants is important for understanding the population dynamics of these remnant populations. We want to know if the populations are growing (and perhaps expanding), holding their own, or shrinking (and perhaps heading toward local extinction).

We call our visits to remnants to find and refind plants “demography,” or demo for short. We call mapping the plants surveying because we use a survey station.

Click here to read our equipment list:

DEMO/SURV Equipment list

each person
pen
compass
8-m tape
radio
visor
tags
flag bag
flags–two colors

all
clipboards
binders
safety triangle
metal detector
reel tapes & pins

Survey station
station
battery
2 poles
tripod
box:
prisms
data collector
power cord/transformer
data cord

Dataset review back in Illinois

Here’s a quick tally of the demography data that we took in the natural remnants this summer. I think we did a lot! We took a total of 5027 records. Here they are broken down by loc status…

qry_demo07.jpg

This is just the first rough pass through the dataset. There is a lot of clean-up to do and mysteries to figure out. For example, of the 81 “good loc, diff tag no” records, 12 have no loc and 1 has no tag (gulp).

Flowering rates seemed to be high this year. 1700 records list one or more normal flowering heads and another 223 records had only non-normal heads. There were some big plants too: two plants had 11 flowering heads and two had ten! The greatest number of rosettes was 47 (that’s good ol’ plant #1540 at NGC.) We counted 9276 total rosettes.

The summer field season is done for me. We drove back to Illinois on Saturday. I’ll try to post reviews of the datasets occasionally and maybe some photos too.

Jennifer is the only one still in the field. She is harvesting seedheads today & tomorrow, then returning to IL.