Peer-Reviewed Journal Details
Mandatory Fields
Walls, AM,Kennedy, R,Fitzgerald, RD,Blight, AJ,Johnson, MP,Edwards, MD
2016
January
Aquaculture Environment Interactions
Potential novel habitat created by holdfasts from cultivated Laminaria digitata: assessing the macroinvertebrate assemblages
Published
WOS: 9 ()
Optional Fields
Laminaria Macroalgae Aquaculture Holdfasts Macroinvertebrate Multivariate analysis Habitat volume KELP FORESTS NORTH-SEA INVERTEBRATE COMMUNITIES MACROFAUNAL COMMUNITY MACROCYSTIS-PYRIFERA EASTERN ATLANTIC FAUNA PATTERNS HYPERBOREA AQUACULTURE
8
157
169
Interest in the cultivation of native kelp species is increasing within Europe. Observations of seaweed farms suggest that they may act as a habitat for associated species, potentially altering the richness of the local area. Previous studies have generally focused on species associated with wild kelps, showing the holdfast to be relatively species-rich. Little research has, however, been conducted on the species associated with cultivated kelps. The habitat created by cultivated kelp holdfasts may act as a novel habitat and not simply an expansion of existing kelp habitat, due to differences in holdfast age, holdfast morphology and holdfast position in the water column. Laminaria digitata from the west of Ireland were examined to test if these differences result in the fauna of cultivated (suspended) holdfasts being distinct from wild (benthic) stands. To place the results in a broader context, patterns were compared to holdfast-richness relationships observed in comparable studies from the NE Atlantic. Total abundance of holdfast epifauna was similar across benthic and suspended holdfasts from the west of Ireland, although species richness was higher in suspended samples. Richness and abundance in suspended kelp holdfasts were consistent with the range of values recorded in other wild kelp studies. There were significant differences in assemblage composition between holdfast types (ANOSIM; R = 0.383, p < 0.05). The distributions of faunal feeding types did not, however, vary between suspended and benthic kelps. Suspended holdfasts in the west of Ireland represented a novel habitat with higher species richness and a different species assemblage when compared to adjacent benthic kelps.
10.3354/aei00170
Grant Details
Publication Themes