Biodiversity & Conservation

Laminaria digitata, ascidians and bryozoans on tide-swept sublittoral fringe rock

IR.MIR.KR.Ldig.T


<i>%Laminaria digitata%</i>, ascidians and bryozoans on tide-swept sublittoral fringe rock
Distribution map

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


  • 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 High
Smothering Tolerant Not relevant Not sensitive Not relevant Low
Increase in suspended sediment Low Very high Very low Decline Low
Decrease in suspended sediment Tolerant Not relevant Not sensitive Not relevant Moderate
Desiccation High High Moderate Not relevant Low
Increase in emergence regime Intermediate High Low Major decline Low
Decrease in emergence regime Tolerant Not relevant Not sensitive Not relevant Not relevant
Increase in water flow rate Tolerant* Not relevant Not sensitive* Rise Moderate
Decrease in water flow rate High High Moderate Major decline Moderate
Increase in temperature Intermediate High Low Minor decline Low
Decrease in temperature Intermediate High Low Minor decline Low
Increase in turbidity Intermediate High Low Minor decline Low
Decrease in turbidity Tolerant* Not relevant Not sensitive* Rise Low
Increase in wave exposure High High Moderate No change Very low
Decrease in wave exposure Not relevant Not relevant Not relevant Not relevant Not relevant
Noise Tolerant Not relevant Not sensitive Not relevant High
Visual Presence Tolerant Not relevant Not sensitive Not relevant High
Abrasion & physical disturbance High High Moderate 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 Decline Moderate
Heavy metal contamination Low Very high Very 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 High Low Minor decline Moderate
Increase in salinity Not relevant Not relevant Not relevant Not relevant Not relevant
Decrease in salinity Intermediate High Low Minor decline Low
Changes in oxygenation Intermediate 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 Insufficient information Insufficient information Insufficient information Not relevant Not relevant
Introduction of non-native species Insufficient information Insufficient information Insufficient information Insufficient Information Not relevant
Extraction of this species Intermediate High Low Decline Low
Extraction of other species Intermediate High Low Decline Low

Species used to indicate biotope intolerance

Physical factors

Botryllus schlosseri
Important characterizing
Corallina officinalis
Important characterizing
Palmaria palmata
Important characterizing
Laminaria digitata
Key Structuring
Lithophyllum incrustans
Important other
Substratum LossHighHighHighHighHigh
SmotheringHighIntermediateIntermediateIntermediateLow
Increase in suspended sedimentHighIntermediateLowIntermediateLow
Decrease in suspended sedimentTolerant*Tolerant*
DesiccationIntermediateHighIntermediateIntermediateHigh
Increase in emergence regimeIntermediateIntermediateIntermediateIntermediateHigh
Decrease in emergence regimeTolerant*Tolerant
Increase in water flow rateIntermediateLowIntermediateLowLow
Decrease in water flow rateIntermediateLow
Increase in temperatureLowIntermediateIntermediateIntermediateTolerant
Decrease in temperatureIntermediateTolerant
Increase in turbidityLowLowLowIntermediateLow
Decrease in turbidityTolerant*Tolerant*
Increase in wave exposureIntermediateLowIntermediateLowTolerant
Decrease in wave exposureLow
NoiseTolerantTolerantNot relevantTolerantTolerant
Visual PresenceTolerantTolerantNot relevantTolerantTolerant
Abrasion & physical disturbanceIntermediateLowIntermediateIntermediateIntermediate
DisplacementHighLowHighHighLow

Chemical factors

Botryllus schlosseri
Important characterizing
Corallina officinalis
Important characterizing
Palmaria palmata
Important characterizing
Laminaria digitata
Key Structuring
Lithophyllum incrustans
Important other
Synthetic compound contaminationInsufficient informationIntermediateHighIntermediateHigh
Heavy metal contaminationInsufficient informationInsufficient informationIntermediateIntermediateInsufficient information
Hydrocarbon contaminationInsufficient informationLowHighLowHigh
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsLowLowIntermediateLowLow
Increase in salinityIntermediateIntermediateIntermediateNot relevantInsufficient information
Decrease in salinityIntermediateIntermediate
Changes in oxygenationIntermediateInsufficient informationLowInsufficient informationInsufficient information

Biological factors

Botryllus schlosseri
Important characterizing
Corallina officinalis
Important characterizing
Palmaria palmata
Important characterizing
Laminaria digitata
Key Structuring
Lithophyllum incrustans
Important other
Introduction of microbial pathogens/parasitesInsufficient informationLowInsufficient informationLowInsufficient information
Introduction of non-native speciesTolerant*Not relevantNot relevantLowInsufficient information
Extraction of this speciesNot relevantIntermediateIntermediateIntermediateNot relevant
Extraction of other speciesHighIntermediateIntermediateIntermediateIntermediate

Species used to indicate biotope recoverability

Physical factors

Botryllus schlosseri
Important characterizing
Corallina officinalis
Important characterizing
Palmaria palmata
Important characterizing
Laminaria digitata
Key Structuring
Lithophyllum incrustans
Important other
Substratum LossHighHighHighHighLow
SmotheringHighVery highHighHighVery high
Increase in suspended sedimentHighVery highHighHighVery high
Decrease in suspended sedimentNot relevantNot relevant
DesiccationHighHighHighHighLow
Increase in emergence regimeHighVery highHighHighLow
Decrease in emergence regimeNot relevantNot relevant
Increase in water flow rateHighVery highHighHighVery high
Decrease in water flow rateHighVery high
Increase in temperatureVery highHighHighHighNot relevant
Decrease in temperatureHighNot relevant
Increase in turbidityImmediateImmediateVery highHighVery high
Decrease in turbidityNot relevantNot relevant
Increase in wave exposureModerateVery highHighHighNot relevant
Decrease in wave exposureImmediate
NoiseNot relevantNot relevantNot relevantNot relevantNot relevant
Visual PresenceNot relevantNot relevantNot relevantNot relevantNot relevant
Abrasion & physical disturbanceHighHighHighHighHigh
DisplacementModerateHighHighHighVery high

Chemical factors

Botryllus schlosseri
Important characterizing
Corallina officinalis
Important characterizing
Palmaria palmata
Important characterizing
Laminaria digitata
Key Structuring
Lithophyllum incrustans
Important other
Synthetic compound contaminationNot relevantHighHighHighLow
Heavy metal contaminationNot relevantInsufficient informationHighHighNot relevant
Hydrocarbon contaminationNot relevantVery highHighHighHigh
Radionuclide contaminationNot relevantInsufficient informationInsufficient informationInsufficient informationNot relevant
Changes in nutrient levelsHighVery highHighHighHigh
Increase in salinityHighHighHighNoneNot relevant
Decrease in salinityVery highHigh
Changes in oxygenationHighInsufficient informationImmediateInsufficient informationNot relevant

Biological factors

Botryllus schlosseri
Important characterizing
Corallina officinalis
Important characterizing
Palmaria palmata
Important characterizing
Laminaria digitata
Key Structuring
Lithophyllum incrustans
Important other
Introduction of microbial pathogens/parasitesHighVery highNot relevantHighNot relevant
Introduction of non-native speciesNot relevantNot relevantNot relevantInsufficient informationNot relevant
Extraction of this speciesNot relevantHighHighHighNot relevant
Extraction of other speciesModerateHighHighHighHigh

This review can be cited as follows:

Marshall, C.E. 2005. Laminaria digitata, ascidians and bryozoans on tide-swept sublittoral fringe rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 30/09/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=273&code=1997>