Biodiversity & Conservation

Styela gelatinosa and other solitary ascidians on very sheltered deep circalittoral muddy sediment

COS.COS.Sty


<i>%Styela gelatinosa%</i> and other solitary ascidians on very sheltered deep circalittoral muddy sediment
Distribution map

COS.COS.Sty 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 Moderate Moderate Major decline Very low
Smothering Intermediate Very high Low Minor decline Low
Increase in suspended sediment Low Very high Very low No change Low
Decrease in suspended sediment Low Very high Very low No change Low
Desiccation Not relevant Not relevant Not relevant Not relevant High
Increase in emergence regime Not relevant Not relevant Not relevant Not relevant High
Decrease in emergence regime Not relevant Not relevant Not relevant Not relevant High
Increase in water flow rate Intermediate High Low Minor decline Moderate
Decrease in water flow rate Low Immediate Not sensitive No change Moderate
Increase in temperature High None Very High Rise 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 Tolerant Not relevant Not sensitive Not relevant High
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 Minor decline Moderate
Displacement Intermediate High Low Minor decline Low

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination High High Moderate Decline Low
Heavy metal contamination Insufficient information Not relevant Insufficient information Insufficient Information Not relevant
Hydrocarbon contamination Insufficient information Not relevant Insufficient information Insufficient Information Moderate
Radionuclide contamination Insufficient information Not relevant Insufficient information Insufficient Information Moderate
Changes in nutrient levels Low Immediate Not sensitive No change Low
Increase in salinity Not relevant Not relevant Not relevant Not relevant Moderate
Decrease in salinity Intermediate High Low Minor decline Low
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 Insufficient information Not relevant Insufficient information Moderate
Introduction of non-native species Tolerant Not relevant Not sensitive Not relevant Moderate
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 Moderate

Species used to indicate biotope intolerance

Physical factors

Ascidiella scabra
Important other
Styela gelatinosa
Important characterizing
Abra alba
Important other
Metridium senile
Important other
Substratum LossHighHighHighHigh
SmotheringLowLowLow
Increase in suspended sedimentLowTolerant*Low
Decrease in suspended sedimentTolerantLowTolerant*
DesiccationIntermediateNot relevantLowIntermediate
Increase in emergence regimeIntermediateNot relevantIntermediateHigh
Decrease in emergence regimeTolerant*Not relevantTolerantTolerant*
Increase in water flow rateLowLowIntermediate
Decrease in water flow rateLowLowLow
Increase in temperatureTolerantLowTolerant
Decrease in temperatureTolerantIntermediateTolerant
Increase in turbidityTolerantLowTolerant*
Decrease in turbidityTolerant*TolerantIntermediate
Increase in wave exposureIntermediateIntermediateLow
Decrease in wave exposureTolerant*TolerantTolerant*
NoiseTolerantTolerantTolerantTolerant
Visual PresenceTolerantTolerantNot relevantTolerant
Abrasion & physical disturbanceHighIntermediateIntermediate
DisplacementHighIntermediateLow

Chemical factors

Ascidiella scabra
Important other
Styela gelatinosa
Important characterizing
Abra alba
Important other
Metridium senile
Important other
Synthetic compound contaminationIntermediateHighLow
Heavy metal contaminationInsufficient informationIntermediateInsufficient information
Hydrocarbon contaminationInsufficient informationLowLow
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsInsufficient informationTolerant*Tolerant*
Increase in salinityTolerantNot relevantLow
Decrease in salinityIntermediateIntermediateLow
Changes in oxygenationLowTolerantTolerant

Biological factors

Ascidiella scabra
Important other
Styela gelatinosa
Important characterizing
Abra alba
Important other
Metridium senile
Important other
Introduction of microbial pathogens/parasitesInsufficient informationInsufficient informationInsufficient information
Introduction of non-native speciesTolerantNot relevantTolerant
Extraction of this speciesNot relevantNot relevantHigh
Extraction of other speciesNot relevantIntermediateHigh

Species used to indicate biotope recoverability

Physical factors

Ascidiella scabra
Important other
Styela gelatinosa
Important characterizing
Abra alba
Important other
Metridium senile
Important other
Substratum LossVery highHighHigh
SmotheringImmediateImmediateImmediate
Increase in suspended sedimentImmediateNot relevantImmediate
Decrease in suspended sedimentNot relevantImmediateNot relevant
DesiccationVery highNot relevantImmediateHigh
Increase in emergence regimeVery highNot relevantVery highHigh
Decrease in emergence regimeNot relevantNot relevantNot relevantNot relevant
Increase in water flow rateImmediateVery highVery high
Decrease in water flow rateImmediateVery highVery high
Increase in temperatureNot relevantVery highNot relevant
Decrease in temperatureNot relevantVery highNot relevant
Increase in turbidityNot relevantVery highNot relevant
Decrease in turbidityNot relevantNot relevantHigh
Increase in wave exposureVery highVery highImmediate
Decrease in wave exposureNot relevantNot relevantNot relevant
NoiseNot relevantNot relevantNot relevantNot relevant
Visual PresenceNot relevantNot relevantNot relevantNot relevant
Abrasion & physical disturbanceVery highVery highVery high
DisplacementVery highImmediateVery high

Chemical factors

Ascidiella scabra
Important other
Styela gelatinosa
Important characterizing
Abra alba
Important other
Metridium senile
Important other
Synthetic compound contaminationVery highHighVery high
Heavy metal contaminationNot relevantHighNot relevant
Hydrocarbon contaminationNot relevantVery highImmediate
Radionuclide contaminationNot relevantNot relevantNot relevant
Changes in nutrient levelsNot relevantNot relevantNot relevant
Increase in salinityNot relevantNot relevantImmediate
Decrease in salinityVery highVery highVery high
Changes in oxygenationImmediateNot relevantNot relevant

Biological factors

Ascidiella scabra
Important other
Styela gelatinosa
Important characterizing
Abra alba
Important other
Metridium senile
Important other
Introduction of microbial pathogens/parasitesNot relevantNot relevantNot relevant
Introduction of non-native speciesNot relevantNot relevantNot relevant
Extraction of this speciesNot relevantNot relevantHigh
Extraction of other speciesNot relevantVery highHigh

This review can be cited as follows:

Hiscock, K. 2002. Styela gelatinosa and other solitary ascidians on very sheltered deep circalittoral muddy sediment. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 23/11/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=274&code=1997>