Biodiversity & Conservation

Halichondria bowerbanki, Eudendrium arbusculum and Eucratea loricata on reduced salinity tide-swept circalittoral mixed substrata

CR.MCR.CFaVS.HbowEud


<i>%Halichondria bowerbanki%</i>, <i>%Eudendrium arbusculum%</i> and <i>%Eucratea loricata%</i> on reduced salinity tide-swept circalittoral mixed substrata
Distribution map

CR.MCR.CFaVS.HbowEud 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 High Moderate Major decline Moderate
Smothering Intermediate High Low Decline Moderate
Increase in suspended sediment Low Immediate Not sensitive No change Moderate
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 Not relevant Not relevant Not relevant Not relevant Not relevant
Increase in water flow rate High High Moderate Decline Moderate
Decrease in water flow rate High High Moderate Decline Very low
Increase in temperature Tolerant Not relevant Not sensitive No change Moderate
Decrease in temperature Tolerant Not relevant Not sensitive No change Moderate
Increase in turbidity Tolerant Not relevant Not sensitive No change Moderate
Decrease in turbidity Tolerant Not relevant Not sensitive No change Moderate
Increase in wave exposure High High Moderate Decline Low
Decrease in wave exposure Not relevant Not relevant Not relevant Not relevant High
Noise Tolerant Not relevant Not sensitive Not relevant High
Visual Presence Tolerant Not relevant Not sensitive Not relevant High
Abrasion & physical disturbance Intermediate High Low Decline High
Displacement High High Moderate Major decline High

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination Intermediate High Low Minor decline Low
Heavy metal contamination Low Very high Very low No change Moderate
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 No change Low
Increase in salinity High High Moderate Decline Moderate
Decrease in salinity High High Moderate Major decline Moderate
Changes in oxygenation Intermediate High Low Minor decline Moderate

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 Tolerant Not relevant Not sensitive Not relevant High
Extraction of this species Not relevant Not relevant Not relevant Not relevant High
Extraction of other species Not relevant Not relevant Not relevant Not relevant High

Species used to indicate biotope intolerance

Physical factors

Balanus crenatus
Important structural
Ascidiella scabra
Important structural
Asterias rubens
Important structural
Metridium senile
Important characterizing
Substratum LossHighHighHighHigh
SmotheringHighLowLowLow
Increase in suspended sedimentLowLowLowLow
Decrease in suspended sedimentTolerantTolerant*
DesiccationHighIntermediateHighIntermediate
Increase in emergence regimeHighIntermediateTolerantHigh
Decrease in emergence regimeTolerant*Tolerant*
Increase in water flow rateLowLowIntermediateIntermediate
Decrease in water flow rateLowLow
Increase in temperatureHighTolerantHighTolerant
Decrease in temperatureTolerantLowTolerant
Increase in turbidityLowTolerantLowTolerant*
Decrease in turbidityTolerant*Intermediate
Increase in wave exposureLowIntermediateIntermediateLow
Decrease in wave exposureTolerant*LowTolerant*
NoiseTolerantTolerantTolerantTolerant
Visual PresenceTolerantTolerantTolerantTolerant
Abrasion & physical disturbanceIntermediateHighIntermediateIntermediate
DisplacementHighHighLowLow

Chemical factors

Balanus crenatus
Important structural
Ascidiella scabra
Important structural
Asterias rubens
Important structural
Metridium senile
Important characterizing
Synthetic compound contaminationHighIntermediateIntermediateLow
Heavy metal contaminationIntermediateInsufficient informationIntermediateInsufficient information
Hydrocarbon contaminationLowInsufficient informationHighLow
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsIntermediateInsufficient informationLowTolerant*
Increase in salinityLowTolerantHighLow
Decrease in salinityIntermediateLow
Changes in oxygenationHighLowHighTolerant

Biological factors

Balanus crenatus
Important structural
Ascidiella scabra
Important structural
Asterias rubens
Important structural
Metridium senile
Important characterizing
Introduction of microbial pathogens/parasitesInsufficient informationInsufficient informationIntermediateInsufficient information
Introduction of non-native speciesInsufficient informationTolerantInsufficient informationTolerant
Extraction of this speciesNot relevantNot relevantNot relevantHigh
Extraction of other speciesNot relevantNot relevantLowHigh

Species used to indicate biotope recoverability

Physical factors

Balanus crenatus
Important structural
Ascidiella scabra
Important structural
Asterias rubens
Important structural
Metridium senile
Important characterizing
Substratum LossHighVery highHighHigh
SmotheringHighImmediateVery highImmediate
Increase in suspended sedimentHighImmediateHighImmediate
Decrease in suspended sedimentNot relevantNot relevant
DesiccationHighVery highHighHigh
Increase in emergence regimeHighVery highNot relevantHigh
Decrease in emergence regimeNot relevantNot relevant
Increase in water flow rateVery highImmediateHighVery high
Decrease in water flow rateImmediateVery high
Increase in temperatureHighNot relevantHighNot relevant
Decrease in temperatureNot relevantHighNot relevant
Increase in turbidityVery highNot relevantVery highNot relevant
Decrease in turbidityNot relevantHigh
Increase in wave exposureVery highVery highHighImmediate
Decrease in wave exposureNot relevantHighNot relevant
NoiseNot relevantNot relevantNot relevantNot relevant
Visual PresenceNot relevantNot relevantNot relevantNot relevant
Abrasion & physical disturbanceHighVery highHighVery high
DisplacementHighVery highImmediateVery high

Chemical factors

Balanus crenatus
Important structural
Ascidiella scabra
Important structural
Asterias rubens
Important structural
Metridium senile
Important characterizing
Synthetic compound contaminationHighVery highHighVery high
Heavy metal contaminationHighNot relevantHighNot relevant
Hydrocarbon contaminationHighNot relevantHighImmediate
Radionuclide contaminationNot relevantNot relevantInsufficient informationNot relevant
Changes in nutrient levelsHighNot relevantHighNot relevant
Increase in salinityVery highNot relevantHighImmediate
Decrease in salinityVery highVery high
Changes in oxygenationHighImmediateHighNot relevant

Biological factors

Balanus crenatus
Important structural
Ascidiella scabra
Important structural
Asterias rubens
Important structural
Metridium senile
Important characterizing
Introduction of microbial pathogens/parasitesNot relevantNot relevantHighNot relevant
Introduction of non-native speciesNot relevantNot relevantInsufficient informationNot relevant
Extraction of this speciesNot relevantNot relevantNot relevantHigh
Extraction of other speciesNot relevantNot relevantHighHigh

This review can be cited as follows:

Hiscock, K. 2002. Halichondria bowerbanki, Eudendrium arbusculum and Eucratea loricata on reduced salinity 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 20/10/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=45&code=2004>