Biodiversity & Conservation

Mytilus edulis and piddocks on eulittoral firm clay

LR.MLR.MusF.MytPid


<i>%Mytilus edulis%</i> and piddocks on eulittoral firm clay
Distribution map

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

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination Intermediate High Low Decline Low
Heavy metal contamination Intermediate High Low Decline Very low
Hydrocarbon contamination High Moderate Moderate Major decline Moderate
Radionuclide contamination Insufficient information Not relevant Insufficient information Insufficient Information Not relevant
Changes in nutrient levels Intermediate High Low Decline Low
Increase in salinity Tolerant Not relevant Not sensitive Not relevant Not relevant
Decrease in salinity Low High Low Minor decline Low
Changes in oxygenation Intermediate 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 Intermediate High Low Low
Introduction of non-native species Tolerant Not relevant Not sensitive Not relevant Not relevant
Extraction of this species Intermediate High Low Minor decline Low
Extraction of other species Not relevant Not relevant Not relevant Not relevant Not relevant

Species used to indicate biotope intolerance

Physical factors

Pholas dactylus
Key Structuring
Mytilus edulis
Key Structuring
Substratum LossHighHigh
SmotheringLowIntermediate
Increase in suspended sedimentLowLow
Decrease in suspended sedimentLow
DesiccationIntermediateLow
Increase in emergence regimeIntermediateLow
Decrease in emergence regimeLow
Increase in water flow rateLowLow
Decrease in water flow rateLow
Increase in temperatureIntermediateLow
Decrease in temperatureLow
Increase in turbidityLowTolerant
Decrease in turbidityTolerant
Increase in wave exposureLowIntermediate
Decrease in wave exposureIntermediate
NoiseLowTolerant*
Visual PresenceLowTolerant*
Abrasion & physical disturbanceIntermediateIntermediate
DisplacementHighIntermediate

Chemical factors

Pholas dactylus
Key Structuring
Mytilus edulis
Key Structuring
Synthetic compound contaminationHighIntermediate
Heavy metal contaminationIntermediateIntermediate
Hydrocarbon contaminationInsufficient informationIntermediate
Radionuclide contaminationInsufficient informationInsufficient information
Changes in nutrient levelsInsufficient informationIntermediate
Increase in salinityIntermediateLow
Decrease in salinityLow
Changes in oxygenationLowLow

Biological factors

Pholas dactylus
Key Structuring
Mytilus edulis
Key Structuring
Introduction of microbial pathogens/parasitesInsufficient informationIntermediate
Introduction of non-native speciesTolerantInsufficient information
Extraction of this speciesIntermediateIntermediate
Extraction of other speciesTolerantLow

Species used to indicate biotope recoverability

Physical factors

Pholas dactylus
Key Structuring
Mytilus edulis
Key Structuring
Substratum LossHighHigh
SmotheringHighHigh
Increase in suspended sedimentHighImmediate
Decrease in suspended sedimentImmediate
DesiccationHighImmediate
Increase in emergence regimeHighVery high
Decrease in emergence regimeVery high
Increase in water flow rateVery highVery high
Decrease in water flow rateVery high
Increase in temperatureHighVery high
Decrease in temperatureVery high
Increase in turbidityImmediateNot relevant
Decrease in turbidityNot relevant
Increase in wave exposureHighHigh
Decrease in wave exposureHigh
NoiseImmediateNot relevant
Visual PresenceImmediateNot relevant
Abrasion & physical disturbanceHighHigh
DisplacementHighHigh

Chemical factors

Pholas dactylus
Key Structuring
Mytilus edulis
Key Structuring
Synthetic compound contaminationHighHigh
Heavy metal contaminationHighHigh
Hydrocarbon contaminationInsufficient informationHigh
Radionuclide contaminationInsufficient informationNot relevant
Changes in nutrient levelsInsufficient informationHigh
Increase in salinityHighVery high
Decrease in salinityVery high
Changes in oxygenationHighVery high

Biological factors

Pholas dactylus
Key Structuring
Mytilus edulis
Key Structuring
Introduction of microbial pathogens/parasitesNot relevantHigh
Introduction of non-native speciesNot relevantNot relevant
Extraction of this speciesHighHigh
Extraction of other speciesInsufficient informationVery high

This review can be cited as follows:

Marshall, C.E. 2008. Mytilus edulis and piddocks on eulittoral firm clay. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 19/09/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=95&code=2004>