Native SpeciesKnotted wrack

Ascophyllum nodosum
FOUND by Clouds n
2013-09-27
Falmouth
ID Confirmed
Quality checked by chotaling
Peer reviewed by Floral Photographers
Field Notes
The area we investigated in was a rocky, costal area, with boat ramps and houses around. Seaweed and barnacles covered most rocks, and about half of our quadrat was submerged. The sand surrounding was course and gray. The area was open as a public beach, and civilians were seen in the area. Cars traversed around a road leading to and from the beach. Many boats launched from the shore's dock; while others were moored nearby. Rocks covered a majority of the lower beach.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The olive-green stalks of these plants are a great indicator that this specimen is Knotted Wrack. The fact that the plant is very close to shore is a good indicator that it is the species we were looking for; however, many other seaweeds live close to the water.
Photo of my evidence.
This picture shows the axial growth pattern of the Knotted Wrack, different from the Bladder Wrack (which has Dichotomous growth).
Photo of my evidence.
There are air bladders along the stalk of this plant. This plant is lacking a mid-rib, a key component of the similar Bladder Wrack.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Ascophyllum nodosum
Common name:
Knotted wrack
Is it alive?: 
Some dead & some alive
Count of individuals: 
1-10
Coverage: 
Between 1/4 and 1/2
Reproduction: 
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 43.731040 °
Longitude: 
W -70.205920 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
Falmouth Town Landing
Trip date: 
Fri, 2013-09-27 10:00
Town or city: 
Falmouth
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Coastal
Watershed: 
Presumpscot
Time of low tide: 
Fri, 2013-09-27 11:37
Habitat Observations
Species diversity: 
6 different species
Evidence of vectors: 
Boat ramp
Boats
Paved road
Dirt road
Walking trail
People
Construction
Water temperature: 
14.0°C
pH: 
7.3
Dissolved oxygen: 
7.8mg/L
Salinity: 
31.1ppt

Comments

Awesome job! Great photo and written evidence. Keep up the good work!