The study of the Arrowhead plant became serious - not Latin name serious, but rather field studies intensified seriously - on Tuesday September 3, when a field botanist explained what I had noticed: the flowers on the West side were different from those on the East side:
Flowers are whorled in groups of 3 in a spike-like raceme up to 1 foot long.
There are usually both male and female flowers on the same stem, but sometimes
a stem has a single gender. Both genders are about 1 inch across with 3 broad
white petals and 3 small pale green sepals behind the flower.
Female flowers have a bulbous green center, covered in tiny carpels.
https://www.minnesotawildflowers.info/flower/broad-leaf-arrowhead
Male flowers have a group of golden yellow stamens in the center.
So why this dichotomy in gender between the 2 sides of the road and the 2 ditches?
Female flowers on the West side and male flowers on the East.
On Monday March 31 I visited the 2 ditches and was amazed to see obvious differences:
The East side ditch - photo directly above - had open water while the West side had snow at least 10cm higher than the road surface.
So Vicki and I have done water monitoring of McGee Creek some years ago and turned to the staff of Couchiching Conservancy, Grants Woods, for help. Were there differences in the 2 bodies of water?
The following is what actually happened, not necessarily the best scientific method since the data were not acquired simultaneously.
I drew 2 samples of water on April 30 at 4PM - 1L from the West ditch in a blue "Nalgene" bottle, and 1L from the East ditch in an orange "Nalgene" bottle. The following photos were taken later in a reenactment.
The team at Grants Woods:
VS, JT, and AA with 2 water testing kits.
Some action shots?
The measurements on May 1 around 11AM:
East West sides of Forest Ave.
Cl-free 0 0
Cl-total 0 0
Alkalinity
180 180
pH 8 8
Total Hardness
450 450
2 different methods of testing delivered similar results:
Nitrates
0 0
pH 8 8 - basic alkaline
Phosphate
0.2 0.0 - I personally could not see any difference between these cards, let alone the test sample.
Alkalinity
282 284
Lake Couchiching water temperature on April 30, 2025
was 5.9°C as given on the web site:
https://seatemperature.info/lake-couchiching-water-temperature.html
Air temperature on Forest Ave was 12°C
Water taken from the East side was clear, colourless, odourless
while
water taken from the West side was yellowish, with a faint fragrence
of "damp forest floor" - not very scientific but like a walk in the woods
after a rain.
WOB
So it is rather late but I actually went to Forest Rd the evening before the flower discovery to see if I could see a moose. This is what I saw in the twilight: (Mon Sept 2 2024)
So maybe evidence for the effects of street lighting? Need to carry out all observations in a co-ordinated way.
wobbily