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Where is our study area? We focus on >6400 ha (25 square miles) of land that used to be tallgrass prairie and is now mostly used for agriculture (especially corn & soybeans). There are lakes and sloughs too.
The study area comprises these 25 sections:
T128 N R40 W:
31, 32, 33, 34, 35
T127 N R40 W:
6, 5, 4, 3, 2,
7, 8, 9, 10, 11,
18, 17, 16, 15, 14,
19, 20, 21, 22, 23
Plus, the area extends into the surrounding sections:
T128 N R40 W: 30, 29, 28, 27, 26, 25, 36,
T127 N R40 W: 1, 12, 13, 24, 25, 26, 27, 28, 29, 30,
T127 N R41 W: 25, 24, 13, 12, 1,
T128 N R41 W: 36, 25
Two files showing the design of the Echinacea-mycorrhizae experiment and the locations of the sampled plants:
designMycorrhizae2009.xls
dataSheetMycorrhizae2009.xls
This file lists flags in random orders suitable for pollinator observation tomorrow.
Here’s the R code used:
flagOrder <- function() {
cat(cat(sample(LETTERS[1:8]),"n"),
cat(sample(LETTERS[1:8]),"n"),
cat(sample(LETTERS[1:8]),"n"),
cat(sample(LETTERS[1:8]),"n"),
cat(sample(LETTERS[1:8]),"n"),
"n")
}
for (i in 1:20) flagOrder()
Over the years I have made several notes about locations of Asclepias viridiflora individuals. I have not noted the species at Staffanson Prairie Preserve. I’ve copied notes below. I can show you where these plants are (on a map or live)…
2-July-1998 site eth
Asclepias vividiflora 6.5 paces S of 2294
1-Aug-1998 site eth
Asclepias viridiflora w pod!
23-July-1998 site nolf
EA pla #3069 cf Asclepias viridiflora 1.1m WSW of this EA
I have mapped an Asclepias viridiflora individual at NRRX. No notes, just the location.
I have collected several seed pods from A. viridiflora at the landfill. Here are the records…
Landfill 9/5/1997 26 seeds 1 pod 4 planted at TP plot
Landfill 9/5/1998 3 pods
Finally, here’s a note from my visor from earlier today. The yellow flags are at your prairie turnip plants.
Note-to-megan
7/3/09 9:31 am
landfill
Asclepias viridiflora
2 fl plas between
yel flags 1-02 & 1-28
1 fl pla between
yel flags 1-31 & 1-52
1 fl pla SSE of
yel flag 1-47 (far S) in dip
It might be fun to see Prairie Home Companion— Free!–in Avon Minnesota.
I generated a list of 40 random UTM coordinates for SPP and posted them here: sppRandCoords.csv.
Here’s the R code I used to generate random coordinates…
df <- data.frame(order= 1:40,
E= round(runif(40, 286100, 286900),2),
N= round(runif(40, 5077080, 5077500),2))
write.csv(df, file= "sppRandCoords.csv", row.names= FALSE)
I gleaned the rough SPP corner coordinates from Google Earth--UTM 15T:
NE 286900 E 5077500 N
SE 286900 E 5077080 N
NW 286100 E 5077500 N
SW 286100 E 5077080 N
Here's a snippet of R code to make a plot of the points and to make a file with latitudes & longitudes..
df <- read.csv(
"https://echinaceaproject.org/wp-content/uploads/sppRandCoords.csv")
plot(df$E, df$N, asp = 1, type = "n")
text(df$E, df$N, labels= df$order)
require(PBSmapping)
names(df) <- c("EID", "X", "Y")
df <- as.EventData(df)
attr(df, "projection") <- "UTM"
attr(df, "zone") <- 15
fred <- convUL(df, km=FALSE)
write.csv(fred, file= "sppRandLL.csv", row.names= FALSE)
Here's a link to those 40 random points in a lat long projection sppRandLL.csv.
Look at this paper to see some nice photos of Echinacea floral parts (Wist and Davis 2008).
Here’s a file that lists sites you can choose for your study.
Also, here’s a list of equipment that we used for during the first field season where we did systematic observations and collections of pollinators.
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