Invasive SpeciesJapanese barberry

Berberis thunbergii
NOT FOUND by ahanson
Portland, ME
ID Confirmed
Quality checked by Simon P
Peer reviewed by
Field Notes
I was enjoying a summer evening walk in Baxter woods. The sun was setting as I walked but it remained warm (around 75 degrees fahrenheit). Because it was a warm summer evening the trail was filled with the sounds of dogs and people playing. Even though Baxter Woods is in the middle of Portland I could only hear cars when the trail was close to the road. The cars didn't drown out the occasional bird song! I was interested in seeing whether Baxter Woods had Japanese barberry and Japanese knotweed. I did some research prior to my walk and learned that Baxter Woods is a primary forest. However, I also learned through my research that Japanese barberry is common in secondary forests and therefore, was not expecting to find it in Baxter Woods. Nevertheless, I wanted to look for its presence because my research informed me that the Japanese barberry is an invasive species of particular concern because of the correlation scientists have found between the the presence of Japanese barberry and ticks. I was expecting to find Japanese knotweed, despite efforts by the Portland trails Association to remove it, because of its strong root system and ability to persist in an ecosystem. There was a little poison ivy right on the side of the trail that I narrowly avoided! As predicted, I did not find any Japanese barberry and did find Japanese knotweed. Interestingly I only found Japanese knotweed in one small cluster not throughout the forest.
Supporting Evidence
Photo of my evidence.
Baxter woods is mostly trees and minimal bushes. I walked the entirety of the trail and did not see any bushes with leaves that were oval-shaped.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Berberis thunbergii
Common name:
Japanese barberry
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.675543 °
W -70.291580 °
Observation Site Information
A photo of our study site.
Upland - Forest
Trip Information
Baxter Woods
Trip date: 
Wed, 2017-07-26 19:07
Town or city: 
Portland, ME
Type of investigation: 
Species Survey
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