Biodiversity & Conservation

Ascophyllum nodosum on very sheltered mid eulittoral rock.

LR.SLR.F.Asc


<i>%Ascophyllum nodosum%</i> on very sheltered mid eulittoral rock.
Distribution map

LR.SLR.F.Asc recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)


  • EC_Habitats

Habitat sensitivity

Physical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Substratum Loss High Low High Major decline High
Smothering Intermediate High Low Decline Moderate
Increase in suspended sediment Low Very high Very low Minor decline Moderate
Decrease in suspended sediment Low Very high Very low No change Moderate
Desiccation Intermediate Moderate Moderate Minor decline Moderate
Increase in emergence regime Intermediate Moderate Moderate Minor decline Moderate
Decrease in emergence regime Low High Low No change Moderate
Increase in water flow rate Low Very high Very low Rise Moderate
Decrease in water flow rate Low Very high Very low Minor decline Moderate
Increase in temperature Low High Low Minor decline Moderate
Decrease in temperature Low High Low Minor decline Moderate
Increase in turbidity Low Immediate Not sensitive No change Moderate
Decrease in turbidity Tolerant* Immediate Not sensitive* No change Moderate
Increase in wave exposure High Low High Decline High
Decrease in wave exposure Not relevant Not relevant Not relevant No change Moderate
Noise Tolerant Not relevant Not sensitive Not relevant High
Visual Presence Tolerant Not relevant Not sensitive Not relevant High
Abrasion & physical disturbance High Low High Decline High
Displacement High Low High Decline Moderate

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination Intermediate Moderate Moderate Decline Low
Heavy metal contamination Low High Low Minor decline Moderate
Hydrocarbon contamination Intermediate High Low Minor decline Moderate
Radionuclide contamination Insufficient information Insufficient information Insufficient information Insufficient Information Not relevant
Changes in nutrient levels Intermediate Moderate Moderate Minor decline Moderate
Increase in salinity High Low High Decline Moderate
Decrease in salinity Low Very high Very low No change High
Changes in oxygenation Low High Low Minor decline Low

Biological Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Introduction of microbial pathogens/parasites Low Insufficient information Moderate Low
Introduction of non-native species Tolerant Not relevant Not sensitive Not relevant Moderate
Extraction of this species Intermediate Moderate Moderate Decline High
Extraction of other species Low High Low Minor decline Moderate

Species used to indicate biotope intolerance

Physical factors

Ascophyllum nodosum
Key structural
Patella vulgata
Key functional
Semibalanus balanoides
Important functional
Substratum LossHighHighHigh
SmotheringHighHighIntermediate
Increase in suspended sedimentLowLowLow
Decrease in suspended sedimentLow
DesiccationIntermediateLowIntermediate
Increase in emergence regimeHighLowHigh
Decrease in emergence regime
Increase in water flow rateIntermediateLowLow
Decrease in water flow rate
Increase in temperatureLowLowIntermediate
Decrease in temperature
Increase in turbidityLowLowLow
Decrease in turbidity
Increase in wave exposureHighLowLow
Decrease in wave exposure
NoiseTolerantLowTolerant
Visual PresenceTolerantTolerantTolerant
Abrasion & physical disturbanceHighLowIntermediate
DisplacementHighIntermediateHigh

Chemical factors

Ascophyllum nodosum
Key structural
Patella vulgata
Key functional
Semibalanus balanoides
Important functional
Synthetic compound contaminationIntermediateHighIntermediate
Heavy metal contaminationLowIntermediateLow
Hydrocarbon contaminationLowHighIntermediate
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsIntermediateLowIntermediate
Increase in salinityLowLowLow
Decrease in salinity
Changes in oxygenationInsufficient informationIntermediateIntermediate

Biological factors

Ascophyllum nodosum
Key structural
Patella vulgata
Key functional
Semibalanus balanoides
Important functional
Introduction of microbial pathogens/parasitesInsufficient informationInsufficient informationIntermediate
Introduction of non-native speciesInsufficient informationNot relevantIntermediate
Extraction of this speciesIntermediateIntermediateNot relevant
Extraction of other speciesTolerantLowIntermediate

Species used to indicate biotope recoverability

Physical factors

Ascophyllum nodosum
Key structural
Patella vulgata
Key functional
Semibalanus balanoides
Important functional
Substratum LossLowHighHigh
SmotheringLowHighHigh
Increase in suspended sedimentImmediateHighVery high
Decrease in suspended sedimentHigh
DesiccationModerateHighHigh
Increase in emergence regimeLowHighHigh
Decrease in emergence regime
Increase in water flow rateLowHighVery high
Decrease in water flow rate
Increase in temperatureModerateHighHigh
Decrease in temperature
Increase in turbidityImmediateVery highVery high
Decrease in turbidity
Increase in wave exposureLowHighHigh
Decrease in wave exposure
NoiseNot relevantHighNot relevant
Visual PresenceNot relevantNot relevantNot relevant
Abrasion & physical disturbanceLowVery highHigh
DisplacementLowHighHigh

Chemical factors

Ascophyllum nodosum
Key structural
Patella vulgata
Key functional
Semibalanus balanoides
Important functional
Synthetic compound contaminationLowHighModerate
Heavy metal contaminationHighHighHigh
Hydrocarbon contaminationModerateHighModerate
Radionuclide contaminationInsufficient informationInsufficient informationNot relevant
Changes in nutrient levelsHighHighHigh
Increase in salinityHighHighHigh
Decrease in salinity
Changes in oxygenationInsufficient informationHighHigh

Biological factors

Ascophyllum nodosum
Key structural
Patella vulgata
Key functional
Semibalanus balanoides
Important functional
Introduction of microbial pathogens/parasitesNot relevantInsufficient informationHigh
Introduction of non-native speciesNot relevantNot relevantHigh
Extraction of this speciesLowHighNot relevant
Extraction of other speciesNot relevantHighHigh

This review can be cited as follows:

Hill, J.M. 2001. Ascophyllum nodosum on very sheltered mid eulittoral rock.. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 23/11/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=4&code=1997>