Native SpeciesRockweed

Fucus vesiculosus
FOUND by 2017eor
ID Confirmed
Quality checked by Mr.Wilson
Peer reviewed by henry
Field Notes
In our study site we were on a beach. Many people go on this beach. There is a paved parking lot right next to the beach where cars drive by. On the day that we were looking for our species it was very hot and also very humid. We were separated by 10 meter wide plots in a transect. Everyone had the same amount of space to look for their species. Every group was looking for the same species there were 4 invasive species and 2 native species each group was looking for. We were in an intertidal area there were rocks but also sand. I noticed that humans walk on that beach and there was a little bit of trash, but not much. We were looking near a boat ramps, boats, and docks. The water temperature was 18.89 celsius there was also 7.8-8.3pH, the dissolved oxygen was 8.60ml-g, the turbidity was 3 meters and 55 centimeters, and there was a 31.79 salinity. In our area our diversity count was 23 different types of species in our zone. Some of the species we found were the green crab, the rough periwinkle, the asian shore crab, rockweed, and hermit crabs. The green crab is one of the invasive species some of us were looking for, and I noticed that many groups found many green crabs in their area.
Supporting Evidence
Photo of my evidence.
This photo shows the olive green-brown colored alga. This picture also shows that near the hold-fast it's is a reddish brown color.
Photo of my evidence.
This photo shows that this native species has branches, and the flattish branches have a midrib, a midrib is a long vein going through the middle of the branch.
Photo of my evidence.
This photo shows that the rockweed is growing dichotomously, that means that each branch divides into two branches over and over again.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Fucus vesiculosus
Common name:
Is it alive?: 
All alive
Count of individuals: 
How big is it?: 
Is it male or female?: 
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.723537 °
W -70.206756 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Falmouth Town Landing 2017
Trip date: 
Tue, 2017-09-26 08:35
Town or city: 
Type of investigation: 
Species and Habitat Survey
Time of low tide: 
Tue, 2017-09-26 10:37
Habitat Observations
Species diversity: 
23 different species
Evidence of vectors: 
Boat ramp
Paved road
Dirt road
Water temperature: 
Dissolved oxygen: 


Hi 2017eor,

Your coordinates are slightly off. Please comment below with the corrected coordinates so we can update your observation.

-The VS Team-