Biodiversity & Conservation

Ascophyllum nodosum with epiphytic sponges and ascidians on variable salinity infralittoral rock

IR.SIR.Lag.AscSAs


SIR.AscSAs

Image Sue Scott - Ascophyllum nodosum with epiphytes (SIR.AscSAs). Image width ca 30 cm.
Image copyright information

Distribution map

IR.SIR.Lag.AscSAs 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 Low Very high Very low No change Low
Increase in suspended sediment Low Very high Very low No change Moderate
Decrease in suspended sediment Low Very high Very low No change Moderate
Desiccation Low High Low Minor decline Moderate
Increase in emergence regime Low High Low Minor decline Low
Decrease in emergence regime Not relevant Not relevant Not relevant No change Moderate
Increase in water flow rate Low Very high Very low Rise Moderate
Decrease in water flow rate Not relevant Not relevant Not relevant Not relevant Not relevant
Increase in temperature Low High Low Minor decline Low
Decrease in temperature Low High Low Minor decline Low
Increase in turbidity Low Very high Very low No change Moderate
Decrease in turbidity Tolerant* Very high Not sensitive* No change Moderate
Increase in wave exposure High Low High Decline Moderate
Decrease in wave exposure Not relevant Not relevant Not relevant No change High
Noise Tolerant Not relevant Not sensitive No change High
Visual Presence Tolerant Not relevant Not sensitive No change High
Abrasion & physical disturbance Intermediate Low High Decline Moderate
Displacement High Low High Major decline High

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination High Low High Decline Moderate
Heavy metal contamination Low High Low Minor decline High
Hydrocarbon contamination Low High Low Decline Moderate
Radionuclide contamination Insufficient information Insufficient information Insufficient information Insufficient Information Not relevant
Changes in nutrient levels Intermediate High Low Minor decline Low
Increase in salinity Low High Low No change Low
Decrease in salinity Low High Low No change Low
Changes in oxygenation Low Very high Very 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 High Low Low
Introduction of non-native species Tolerant Not relevant Not sensitive No change Low
Extraction of this species Intermediate High Low No change Moderate
Extraction of other species Low High Low Decline Moderate

Species used to indicate biotope intolerance

Physical factors

Ascophyllum nodosum
Key structural
Ciona intestinalis
Important characterizing
Fucus serratus
Important structural
Substratum LossHighHighHigh
SmotheringHighIntermediateHigh
Increase in suspended sedimentLowLowLow
Decrease in suspended sediment
DesiccationIntermediateIntermediateIntermediate
Increase in emergence regimeHighHighIntermediate
Decrease in emergence regime
Increase in water flow rateIntermediateLowIntermediate
Decrease in water flow rate
Increase in temperatureLowIntermediateTolerant
Decrease in temperature
Increase in turbidityLowTolerantLow
Decrease in turbidity
Increase in wave exposureHighIntermediateHigh
Decrease in wave exposure
NoiseTolerantTolerantTolerant
Visual PresenceTolerantTolerantTolerant
Abrasion & physical disturbanceHighHighIntermediate
DisplacementHighHighHigh

Chemical factors

Ascophyllum nodosum
Key structural
Ciona intestinalis
Important characterizing
Fucus serratus
Important structural
Synthetic compound contaminationIntermediateInsufficient informationHigh
Heavy metal contaminationLowInsufficient informationLow
Hydrocarbon contaminationLowInsufficient informationIntermediate
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsIntermediateTolerant*Intermediate
Increase in salinityLowLowLow
Decrease in salinity
Changes in oxygenationInsufficient informationLowLow

Biological factors

Ascophyllum nodosum
Key structural
Ciona intestinalis
Important characterizing
Fucus serratus
Important structural
Introduction of microbial pathogens/parasitesInsufficient informationInsufficient informationInsufficient information
Introduction of non-native speciesInsufficient informationIntermediateInsufficient information
Extraction of this speciesIntermediateNot relevantIntermediate
Extraction of other speciesTolerantTolerantTolerant

Species used to indicate biotope recoverability

Physical factors

Ascophyllum nodosum
Key structural
Ciona intestinalis
Important characterizing
Fucus serratus
Important structural
Substratum LossLowHighHigh
SmotheringLowVery highHigh
Increase in suspended sedimentImmediateImmediateVery high
Decrease in suspended sediment
DesiccationModerateVery highHigh
Increase in emergence regimeLowHighHigh
Decrease in emergence regime
Increase in water flow rateLowImmediateHigh
Decrease in water flow rate
Increase in temperatureModerateVery highNot relevant
Decrease in temperature
Increase in turbidityImmediateNot relevantVery high
Decrease in turbidity
Increase in wave exposureLowVery highHigh
Decrease in wave exposure
NoiseNot relevantNot relevantNot relevant
Visual PresenceNot relevantNot relevantNot relevant
Abrasion & physical disturbanceLowHighHigh
DisplacementLowHighHigh

Chemical factors

Ascophyllum nodosum
Key structural
Ciona intestinalis
Important characterizing
Fucus serratus
Important structural
Synthetic compound contaminationLowInsufficient informationHigh
Heavy metal contaminationHighInsufficient informationHigh
Hydrocarbon contaminationModerateInsufficient informationHigh
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsHighNot relevantHigh
Increase in salinityHighImmediateVery high
Decrease in salinity
Changes in oxygenationInsufficient informationImmediateVery high

Biological factors

Ascophyllum nodosum
Key structural
Ciona intestinalis
Important characterizing
Fucus serratus
Important structural
Introduction of microbial pathogens/parasitesNot relevantInsufficient informationInsufficient information
Introduction of non-native speciesNot relevantVery highInsufficient information
Extraction of this speciesLowNot relevantHigh
Extraction of other speciesNot relevantNot relevantNot relevant

This review can be cited as follows:

Hill, J.M. 2001. Ascophyllum nodosum with epiphytic sponges and ascidians on variable salinity infralittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 21/04/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=328&code=1997>