Biodiversity & Conservation

Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata

CR.MCR.M.ModT


MCR.ModT

Image Anon. - Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata. Image width ca 50 cm.
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Distribution map

CR.MCR.M.ModT recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)


  • EC_Habitats
  • UK_BAP
  • OSPAR

Habitat sensitivity

Physical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Substratum Loss High Very low / none Very High Major decline High
Smothering Intermediate Low High Decline Low
Increase in suspended sediment Low Very high Very low Decline Low
Decrease in suspended sediment Low Immediate Not sensitive No change Moderate
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 Tolerant* Not relevant Not sensitive* No change Very low
Increase in water flow rate Intermediate Low High Decline Moderate
Decrease in water flow rate Intermediate Low High Minor decline Low
Increase in temperature Intermediate Low High Decline Moderate
Decrease in temperature Tolerant* Not relevant Not sensitive* Minor decline Very low
Increase in turbidity Low High Low Minor decline Moderate
Decrease in turbidity Low High Low Minor decline Very low
Increase in wave exposure Intermediate Low High Decline Low
Decrease in wave exposure Tolerant* Not relevant Not sensitive* No change Low
Noise Tolerant Not relevant Not sensitive No change High
Visual Presence Tolerant Not relevant Not sensitive No change High
Abrasion & physical disturbance High Low High Decline Moderate
Displacement Intermediate Low High Decline Low

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination High Very low / none Very High Major decline Very low
Heavy metal contamination Low High Low No change Very low
Hydrocarbon contamination Intermediate High Low Minor decline Low
Radionuclide contamination Insufficient information Not relevant Insufficient information Insufficient Information Not relevant
Changes in nutrient levels Low Very high Very low Minor decline Very low
Increase in salinity Not relevant Not relevant Not relevant Not relevant Not relevant
Decrease in salinity High Very low / none Very High Decline Moderate
Changes in oxygenation Intermediate 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 Very high Very low Low
Introduction of non-native species Insufficient information Not relevant Insufficient information Insufficient Information Not relevant
Extraction of this species High Very low / none Very High Major decline Low
Extraction of other species High Very low / none Very High Major decline Low

Species used to indicate biotope intolerance

Physical factors

Modiolus modiolus
Key structural
Alcyonium digitatum
Important characterizing
Ophiothrix fragilis
Important characterizing
Echinus esculentus
Important functional
Delesseria sanguinea
Important other
Substratum LossHighHighHighHighHigh
SmotheringIntermediateIntermediateHighIntermediateIntermediate
Increase in suspended sedimentLowLowLowLowLow
Decrease in suspended sedimentLow
DesiccationHighNot relevantIntermediateIntermediateHigh
Increase in emergence regimeHighNot relevantNot relevantLowIntermediate
Decrease in emergence regimeTolerant*
Increase in water flow rateIntermediateTolerant*LowLowIntermediate
Decrease in water flow rateIntermediateIntermediate
Increase in temperatureIntermediateLowIntermediateIntermediateLow
Decrease in temperatureTolerant*Low
Increase in turbidityLowLowLowLowTolerant
Decrease in turbidityTolerant*
Increase in wave exposureIntermediateTolerantLowLowTolerant
Decrease in wave exposureTolerant*Intermediate
NoiseTolerantTolerantLowTolerantTolerant
Visual PresenceTolerantTolerantTolerantLowTolerant
Abrasion & physical disturbanceHighIntermediateIntermediateIntermediateIntermediate
DisplacementLowHighTolerantLowHigh

Chemical factors

Modiolus modiolus
Key structural
Alcyonium digitatum
Important characterizing
Ophiothrix fragilis
Important characterizing
Echinus esculentus
Important functional
Delesseria sanguinea
Important other
Synthetic compound contaminationIntermediateIntermediateInsufficient informationHighHigh
Heavy metal contaminationLowInsufficient informationInsufficient informationHighLow
Hydrocarbon contaminationLowLowHighHighHigh
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsLowLowIntermediateTolerant*Low
Increase in salinityNot relevantIntermediateLowIntermediateLow
Decrease in salinityHigh
Changes in oxygenationLowHighHighIntermediateHigh

Biological factors

Modiolus modiolus
Key structural
Alcyonium digitatum
Important characterizing
Ophiothrix fragilis
Important characterizing
Echinus esculentus
Important functional
Delesseria sanguinea
Important other
Introduction of microbial pathogens/parasitesLowInsufficient informationLowIntermediateInsufficient information
Introduction of non-native speciesInsufficient informationInsufficient informationTolerantNot relevantNot relevant
Extraction of this speciesHighNot relevantNot relevantIntermediateNot relevant
Extraction of other speciesIntermediateIntermediateTolerantIntermediateTolerant*

Species used to indicate biotope recoverability

Physical factors

Modiolus modiolus
Key structural
Alcyonium digitatum
Important characterizing
Ophiothrix fragilis
Important characterizing
Echinus esculentus
Important functional
Delesseria sanguinea
Important other
Substratum LossLowHighHighHighHigh
SmotheringLowHighHighHighHigh
Increase in suspended sedimentImmediateVery highVery highVery highImmediate
Decrease in suspended sedimentImmediate
DesiccationLowNot relevantHighHighHigh
Increase in emergence regimeLowNot relevantNot relevantVery highHigh
Decrease in emergence regimeNot relevant
Increase in water flow rateLowNot relevantVery highVery highHigh
Decrease in water flow rateLowHigh
Increase in temperatureLowHighHighHighImmediate
Decrease in temperatureNot relevantHigh
Increase in turbidityVery highVery highVery highVery highNot relevant
Decrease in turbidityNot relevant
Increase in wave exposureLowNot relevantVery highVery highNot relevant
Decrease in wave exposureNot relevantHigh
NoiseNot relevantNot relevantVery highNot relevantNot relevant
Visual PresenceNot relevantNot relevantNot relevantImmediateNot relevant
Abrasion & physical disturbanceLowHighHighHighHigh
DisplacementVery highHighNot relevantVery highHigh

Chemical factors

Modiolus modiolus
Key structural
Alcyonium digitatum
Important characterizing
Ophiothrix fragilis
Important characterizing
Echinus esculentus
Important functional
Delesseria sanguinea
Important other
Synthetic compound contaminationLowHighNot relevantHighHigh
Heavy metal contaminationVery highInsufficient informationNot relevantHighVery high
Hydrocarbon contaminationVery highHighHighHighHigh
Radionuclide contaminationNot relevantInsufficient informationNot relevantInsufficient informationNot relevant
Changes in nutrient levelsVery highHighHighNot relevantImmediate
Increase in salinityNot relevantHighHighHighImmediate
Decrease in salinityLow
Changes in oxygenationVery highHighHighHighHigh

Biological factors

Modiolus modiolus
Key structural
Alcyonium digitatum
Important characterizing
Ophiothrix fragilis
Important characterizing
Echinus esculentus
Important functional
Delesseria sanguinea
Important other
Introduction of microbial pathogens/parasitesVery highInsufficient informationHighHighInsufficient information
Introduction of non-native speciesNot relevantInsufficient informationNot relevantNot relevantNot relevant
Extraction of this speciesLowNot relevantNot relevantHighNot relevant
Extraction of other speciesLowHighNot relevantHighNot relevant

This review can be cited as follows:

Tyler-Walters, H. 2006. Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 03/09/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=137&code=1997>