Ascophyllum nodosum (L.) Le Jolis
Knotted Wrack
Synonyms: Fucus nodosus, Fucus nodosus var. denudatus, Fucus nodosus var. evesiculosus, Fucus nodosus var. siliquatus, Ascophylla laevigata, Ascophylla nodosa, Ascophyllum mackayi, Ascophyllum mackayi f. robertsonii, Ascophyllum robertsonii, Chordaria scorpioides, Fistularia mackayi, Fistularia nodosa, Fucodium nodosum, Focodium nodosum var. scorpioides, Halicoccus nodosus, Halicoccus nodosus var. furcatus, Halidrys siliquosa var. minor, Ozothallia nodosa, Ozothallia nodosa f. furcata, Ozothallia vulgaris, Physocaulon nodosum
CLASSIFICATION
Main Group: Protoctist
Sublevel 1: Stramenopiles
Sublevel 2: Brown Algae
✦✦✦✦✦✦✦✦
Division: Ochrophyta
Class: Phaeophyceae
Order: Fucales
Family: Fucaceae
Genus: Ascophyllum
Species: Ascophyllum nodosum
STATUS IN NEW ENGLAND
Origin: Native
Invasive, Pest, or Pathogen?: No
Rarity Designations:
There are no rarity listings for protoctists.
The federal government and New England states do not evaluate
protoctists for rarity.
BIOLOGY/ECOLOGY
Feeding Type: Photoautotroph
HABITAT
PHOTOS OF Ascophyllum nodosum
In a tidepool
Essex County, MA
Date: 2012-03-08
In a tidepool
Essex County, MA
Date: 2007-03-30
In a tidepool
Essex County, MA
Date: 2007-03-30
Washed ashore
Essex County, MA
Date: 2016-02-28
ASSOCIATED SPECIES
| Associated Species | Type of Associate | Reference |
|---|---|---|
| Vertebrata lanosa (A Tubed Weed) | Hemiparasite | Ciciotte and Thomas 1997 |
PHOTOS OF SPECIES ASSOCIATIONS
Vertebrata lanosa on Ascophyllum nodosum
Essex County, MA
Date: 2017-01-11
REFERENCES
Ciciotte, S.L. and R.J. Thomas. 1997. Carbon exchange between Polysiphonia lanosa (Rhodophyceae) and its brown algal host. American Journal of Botany. 84(11):1614-1616.