Biodiversity & Conservation

Laminaria digitata and piddocks on sublittoral fringe soft rock

IR.MIR.KR.Ldig.Pid


MIR.Ldig.Pid

Image David George - View across shore showing extensive kelp beds on chalk. Image width ca 4 m.
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Distribution map

IR.MIR.KR.Ldig.Pid recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)


  • EC_Habitats
  • UK_BAP

Habitat sensitivity

Physical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Substratum Loss High High Moderate Major decline Moderate
Smothering Intermediate High Low Major decline Very low
Increase in suspended sediment Intermediate High Low Decline Very low
Decrease in suspended sediment
Desiccation Intermediate High Low Minor decline Low
Increase in emergence regime Intermediate High Low Decline Low
Decrease in emergence regime
Increase in water flow rate Low High Low Minor decline Low
Decrease in water flow rate
Increase in temperature Intermediate High Low Decline Moderate
Decrease in temperature
Increase in turbidity Intermediate High Low Major decline Moderate
Decrease in turbidity
Increase in wave exposure Intermediate High Low Major decline Low
Decrease in wave exposure
Noise Tolerant Not relevant Not sensitive Not relevant Not relevant
Visual Presence Tolerant Not relevant Not sensitive Not relevant Not relevant
Abrasion & physical disturbance Intermediate High Low Minor decline Low
Displacement High High Moderate Major decline Low

Chemical Factors

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

Species used to indicate biotope intolerance

Physical factors

Laminaria digitata
Key structural
Pholas dactylus
Key structural
Polydora ciliata
Key functional
Palmaria palmata
Important characterizing
Substratum LossHighHighHighHigh
SmotheringIntermediateLowTolerantIntermediate
Increase in suspended sedimentIntermediateLowTolerantLow
Decrease in suspended sedimentTolerant*
DesiccationIntermediateIntermediateIntermediateIntermediate
Increase in emergence regimeIntermediateIntermediateIntermediateIntermediate
Decrease in emergence regimeTolerant*
Increase in water flow rateLowLowIntermediateIntermediate
Decrease in water flow rateIntermediate
Increase in temperatureIntermediateIntermediateLowIntermediate
Decrease in temperatureIntermediate
Increase in turbidityIntermediateLowTolerantLow
Decrease in turbidityTolerant*
Increase in wave exposureLowLowLowIntermediate
Decrease in wave exposure
NoiseTolerantLowTolerantNot relevant
Visual PresenceTolerantLowLowNot relevant
Abrasion & physical disturbanceIntermediateIntermediateIntermediateIntermediate
DisplacementHighHighLowHigh

Chemical factors

Laminaria digitata
Key structural
Pholas dactylus
Key structural
Polydora ciliata
Key functional
Palmaria palmata
Important characterizing
Synthetic compound contaminationIntermediateHighLowHigh
Heavy metal contaminationIntermediateIntermediateIntermediateIntermediate
Hydrocarbon contaminationLowInsufficient informationIntermediateHigh
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsLowInsufficient informationLowIntermediate
Increase in salinityNot relevantIntermediateLowIntermediate
Decrease in salinityIntermediate
Changes in oxygenationInsufficient informationLowLowLow

Biological factors

Laminaria digitata
Key structural
Pholas dactylus
Key structural
Polydora ciliata
Key functional
Palmaria palmata
Important characterizing
Introduction of microbial pathogens/parasitesLowInsufficient informationInsufficient informationInsufficient information
Introduction of non-native speciesLowTolerantInsufficient informationNot relevant
Extraction of this speciesIntermediateIntermediateLowIntermediate
Extraction of other speciesIntermediateTolerantNot relevantIntermediate

Species used to indicate biotope recoverability

Physical factors

Laminaria digitata
Key structural
Pholas dactylus
Key structural
Polydora ciliata
Key functional
Palmaria palmata
Important characterizing
Substratum LossHighHighHighHigh
SmotheringHighHighNot relevantHigh
Increase in suspended sedimentHighHighNot relevantHigh
Decrease in suspended sedimentNot relevant
DesiccationHighHighHighHigh
Increase in emergence regimeHighHighHighHigh
Decrease in emergence regimeNot relevant
Increase in water flow rateHighVery highHighHigh
Decrease in water flow rateHigh
Increase in temperatureHighHighHighHigh
Decrease in temperatureHigh
Increase in turbidityHighImmediateNot relevantVery high
Decrease in turbidityNot relevant
Increase in wave exposureHighHighHighHigh
Decrease in wave exposure
NoiseNot relevantImmediateNot relevantNot relevant
Visual PresenceNot relevantImmediateHighNot relevant
Abrasion & physical disturbanceHighHighHighHigh
DisplacementHighHighHighHigh

Chemical factors

Laminaria digitata
Key structural
Pholas dactylus
Key structural
Polydora ciliata
Key functional
Palmaria palmata
Important characterizing
Synthetic compound contaminationHighHighHighHigh
Heavy metal contaminationHighHighHighHigh
Hydrocarbon contaminationHighInsufficient informationHighHigh
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsHighInsufficient informationHighHigh
Increase in salinityNoneHighHighHigh
Decrease in salinityVery high
Changes in oxygenationInsufficient informationHighHighImmediate

Biological factors

Laminaria digitata
Key structural
Pholas dactylus
Key structural
Polydora ciliata
Key functional
Palmaria palmata
Important characterizing
Introduction of microbial pathogens/parasitesHighNot relevantNot relevantNot relevant
Introduction of non-native speciesInsufficient informationNot relevantInsufficient informationNot relevant
Extraction of this speciesHighHighHighHigh
Extraction of other speciesHighInsufficient informationNot relevantHigh

This review can be cited as follows:

Hill, J.M. 2008. Laminaria digitata and piddocks on sublittoral fringe soft 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=26&code=1997>