Invasive SpeciesJapanese knotweed

Fallopia japonica
FOUND by littleriver5
ID Confirmed
Quality checked by Chloe B
Peer reviewed by Chloe B
Field Notes
I am happy because In my quadrat the organism that looks like Japanese knotweed is dying. If that is Japanese knotweed and it dies, many organisms can grow and organisms won't die, because nothing is taking it over. Also I hear birds in the tall trees above and cars in the distance. I can smell frost and leaves on the frigid day. I can see the bright sun shining through the trees beginning to rise. I see so much of the same organism in the area, and it covers the whole area in the quadrat and all around the quadrat. Most of it was green but I can see that it is turning yellow. I am very surprised that I didn’t see more insects or bugs in my quadrat. The quadrat was very inactive. Nothing was moving around. Some questions I have are, Is the organism dying due to lack of sunlight or is there a different reason? How come this is the only spot that is dying?
Supporting Evidence
Photo of my evidence.
I know that I found Japanese knotweed because I cut open the stem of what I think is Japanese knotweed and the organism had a hollow stem. Japanese knotweed stems are hollow and the same brownish red color according to the Japanese knotweed species ID cards.
Photo of my evidence.
I can tell that it is Japanese Knotweed because the organism in my quadrat is a similar size as the Japanese Knotweed pictures on the species ID card. The leaves are heart shaped, and It has the same features that the Japanese knotweed pictures on the ID cards have on Vital Signs.
Photo of my evidence.
I know that there is Japanese knotweed because the area is covered with it. Japanese knotweed is very invasive and it can take over the environment Just like the organisms in this area are doing. The Japanese knotweed isn't just the right shape and size it's the right color, according to the pictures on vital signs the color of the organisms is almost exact. Some of the leaves are turning yellow, but I learned that, that is normal for Japanese knotweed.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Fallopia japonica
Common name:
Japanese knotweed
Count of individuals: 
Between 1/2 and 3/4
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
We’re sorry, JavaScript is required to view the map. If JavaScript is you may wish to upgrade to a newer browser in order to view this map.
Map this species
N 43.664074 °
W -70.445770 °
Observation Site Information
A photo of our study site.
Upland - Forest
Trip Information
Weeks Road Trail System
Trip date: 
Fri, 2018-10-12 08:00
Town or city: 
Type of investigation: 
Species and Habitat Survey
Habitat Observations
Species diversity: 
3 different species
Evidence of vectors: 
Walking trail
Tree canopy cover: 
Between 1/2 and 3/4
Soil moisture: 
Login or register to post comments