Biodiversity & Conservation

Pomatoceros triqueter, Balanus crenatus and bryozoan crusts on mobile circalittoral cobbles and pebbles

CR.ECR.EFa.PomByC


ECR.PomByC

Image Jon Davies - Cobbles with dense Pomatoceros species (ECR.PomByC). Image width ca 50 cm.
Image copyright information

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Distribution map

CR.ECR.EFa.PomByC 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 Very high Low Major decline Moderate
Smothering High Very high Low Major decline Moderate
Increase in suspended sediment Low Immediate Not sensitive No change Low
Decrease in suspended sediment Low Immediate Not sensitive No change Low
Desiccation Not relevant Not relevant Not relevant Not relevant Not relevant
Increase in emergence regime Not relevant Not relevant Not relevant Not relevant Not relevant
Decrease in emergence regime Not relevant Not relevant Not relevant Not relevant Not relevant
Increase in water flow rate Intermediate Very high Low Minor decline Low
Decrease in water flow rate High Very high Low Rise Low
Increase in temperature Low Immediate Not sensitive Minor decline Low
Decrease in temperature Intermediate Very high Low Decline Low
Increase in turbidity Tolerant Not relevant Not sensitive Not relevant Not relevant
Decrease in turbidity Intermediate Very high Low Not relevant Very low
Increase in wave exposure Intermediate Very high Low Minor decline Low
Decrease in wave exposure High Very high Low Rise Low
Noise Tolerant Not relevant Not sensitive No change High
Visual Presence Tolerant Not relevant Not sensitive No change High
Abrasion & physical disturbance Tolerant Not relevant Not sensitive No change High
Displacement Intermediate Very high Low Minor decline Low

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination Low Immediate Not sensitive Decline Low
Heavy metal contamination Low Immediate Not sensitive Minor decline Low
Hydrocarbon contamination Low Immediate Not sensitive Minor decline Very low
Radionuclide contamination Insufficient information Not relevant Insufficient information Not relevant Not relevant
Changes in nutrient levels Tolerant Not relevant Not sensitive Not relevant Not relevant
Increase in salinity Not relevant Not relevant Not relevant Not relevant Not relevant
Decrease in salinity Not relevant Not relevant Not relevant Not relevant Not relevant
Changes in oxygenation Not relevant Not relevant Not relevant Not relevant Not relevant

Biological Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Introduction of microbial pathogens/parasites Low Immediate Not sensitive Low
Introduction of non-native species Insufficient information Not relevant Insufficient information Insufficient Information Not relevant
Extraction of this species Not relevant Not relevant Not relevant Not relevant Not relevant
Extraction of other species Not relevant Not relevant Not relevant Not relevant Not relevant

Species used to indicate biotope intolerance

Physical factors

Pomatoceros triqueter
Important characterizing
Balanus crenatus
Important characterizing
Substratum LossHighHigh
SmotheringHighHigh
Increase in suspended sedimentLowLow
Decrease in suspended sedimentLow
DesiccationIntermediateHigh
Increase in emergence regimeIntermediateHigh
Decrease in emergence regimeTolerant*
Increase in water flow rateTolerant*Low
Decrease in water flow rateTolerant
Increase in temperatureTolerant*High
Decrease in temperatureIntermediate
Increase in turbidityTolerantLow
Decrease in turbidityTolerant
Increase in wave exposureLowLow
Decrease in wave exposureTolerant
NoiseTolerantTolerant
Visual PresenceTolerantTolerant
Abrasion & physical disturbanceIntermediateIntermediate
DisplacementLowHigh

Chemical factors

Pomatoceros triqueter
Important characterizing
Balanus crenatus
Important characterizing
Synthetic compound contaminationInsufficient informationHigh
Heavy metal contaminationInsufficient informationIntermediate
Hydrocarbon contaminationInsufficient informationLow
Radionuclide contaminationInsufficient informationInsufficient information
Changes in nutrient levelsInsufficient informationIntermediate
Increase in salinityTolerantLow
Decrease in salinityHigh
Changes in oxygenationInsufficient informationHigh

Biological factors

Pomatoceros triqueter
Important characterizing
Balanus crenatus
Important characterizing
Introduction of microbial pathogens/parasitesInsufficient informationInsufficient information
Introduction of non-native speciesTolerantInsufficient information
Extraction of this speciesNot relevantNot relevant
Extraction of other speciesNot relevantNot relevant

Species used to indicate biotope recoverability

Physical factors

Pomatoceros triqueter
Important characterizing
Balanus crenatus
Important characterizing
Substratum LossHighHigh
SmotheringHighHigh
Increase in suspended sedimentHighHigh
Decrease in suspended sedimentHigh
DesiccationHighHigh
Increase in emergence regimeHighHigh
Decrease in emergence regimeNot relevant
Increase in water flow rateNot relevantVery high
Decrease in water flow rateNot relevant
Increase in temperatureNot relevantHigh
Decrease in temperatureHigh
Increase in turbidityNot relevantVery high
Decrease in turbidityNot relevant
Increase in wave exposureHighVery high
Decrease in wave exposureNot relevant
NoiseNot relevantNot relevant
Visual PresenceNot relevantNot relevant
Abrasion & physical disturbanceHighHigh
DisplacementHighHigh

Chemical factors

Pomatoceros triqueter
Important characterizing
Balanus crenatus
Important characterizing
Synthetic compound contaminationNot relevantHigh
Heavy metal contaminationNot relevantHigh
Hydrocarbon contaminationNot relevantHigh
Radionuclide contaminationNot relevantNot relevant
Changes in nutrient levelsNot relevantHigh
Increase in salinityNot relevantVery high
Decrease in salinityHigh
Changes in oxygenationNot relevantHigh

Biological factors

Pomatoceros triqueter
Important characterizing
Balanus crenatus
Important characterizing
Introduction of microbial pathogens/parasitesNot relevantNot relevant
Introduction of non-native speciesNot relevantNot relevant
Extraction of this speciesNot relevantNot relevant
Extraction of other speciesNot relevantNot relevant

This review can be cited as follows:

Tyler-Walters, H. 2002. Pomatoceros triqueter, Balanus crenatus and bryozoan crusts on mobile circalittoral cobbles and pebbles. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 18/09/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=177&code=1997>