Native SpeciesRockweed

Fucus vesiculosus
FOUND by 000049
2012-10-09
Falmouth
ID Confirmed
Quality checked by Amelia R.
Peer reviewed by Amelia R.
Field Notes
For our 8th grade science trip, we ventured to Town Landing coast; we searched for a native species called Rockweed and an invasive species called Star Tunicate. It was very windy, cold, and rainy. The tide was relatively low by the rocks. We found Rockweed, and it was yellow-brown and black in color. It had squishy vesicles (air bubbles), and was very abundant. We did not find Star Tunicate.
Supporting Evidence
Photo of my evidence.
The physical attributes of the recorded species accurately parallel those of the previously identified species.These physical attributes include a flat thallus that bears a midrib. This midrib differentiates itself from the knotted wrack.
Photo of my evidence.
Another paralleled physical attribute includes pairs of vesicles found protruding from the end of the seaweed's main stems. This is just like the descriptions and pictures shown in the invasive species data sheets.
Photo of my evidence.
A physical attribute found on the recorded specimen that was also listed on the data sheet, is the way that the alga itself grows dichotomously, or rather, the stems divide themselves into two different stems protruding themselves from the original stem and so on.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Fucus vesiculosus
Common name:
Rockweed
Is it alive?: 
All alive
Count of individuals: 
Coverage: 
Between 1/2 and 3/4
Reproduction: 
Vegetative structures (plants)
How big is it?: 
Greater than 10 cm
Is it male or female?: 
Can't tell
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 43.732600 °
Longitude: 
W -70.204150 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
Town Landing
Trip date: 
Tue, 2012-10-09 16:51
Town or city: 
Falmouth
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Coastal
Watershed: 
Presumpscot
Time of low tide: 
Habitat Observations
Species diversity: 
4 different species
Evidence of vectors: 
Boat ramp
Boats
People
Water temperature: 
14.0°C
pH: 
8.0
Dissolved oxygen: 
9.1mg/L
Salinity: 
31.4ppt

Comments

I have no doubt that you found fucus vesiculosus! I especially like the photo of the paired air bladders. Great evidence!

Keep up the good work!

lil lumpkims

Your evidence photos 2 and 3 are beautiful, and are great for ID at the same time. Go scientific photographers!