Biodiversity & Conservation

Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools

LR.FLR.Rkp.H


Hydroids, ephemeral seaweeds and <i>%Littorina littorea%</i> in shallow eulittoral mixed substrata pools
Distribution map

LR.FLR.Rkp.H recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)



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

Chemical Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Synthetic compound contamination Intermediate High Low Decline Moderate
Heavy metal contamination Intermediate High Low Decline Moderate
Hydrocarbon contamination High High Moderate Major decline Moderate
Radionuclide contamination Insufficient information Insufficient information Insufficient information Insufficient Information Not relevant
Changes in nutrient levels Intermediate Very high Low Decline Low
Increase in salinity Low Very high Very low No change Low
Decrease in salinity Low Very high Very low No change Low
Changes in oxygenation Low Immediate Not sensitive No change Low

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 Not relevant Not relevant Not relevant Not relevant Not relevant
Extraction of this species Intermediate Very high Low No change Low
Extraction of other species Not relevant Not relevant Not relevant Not relevant Not relevant

Species used to indicate biotope intolerance

Physical factors

Obelia longissima
Important characterizing
Littorina littorea
Important characterizing
Ulva intestinalis
Important characterizing
Mytilus edulis
Important other
Semibalanus balanoides
Important other
Substratum LossHighHighHighHighHigh
SmotheringIntermediateHighHighIntermediateIntermediate
Increase in suspended sedimentIntermediateIntermediateIntermediateLowLow
Decrease in suspended sedimentLowTolerantLow
DesiccationHighLowLowLowIntermediate
Increase in emergence regimeIntermediateLowTolerant*LowHigh
Decrease in emergence regimeTolerant*LowLow
Increase in water flow rateIntermediateIntermediateIntermediateLowLow
Decrease in water flow rateIntermediateTolerantLow
Increase in temperatureHighLowTolerant*LowIntermediate
Decrease in temperatureLowTolerantLow
Increase in turbidityLowLowLowTolerantLow
Decrease in turbidityLowTolerant*Tolerant
Increase in wave exposureLowIntermediateLowIntermediateLow
Decrease in wave exposureIntermediateTolerantIntermediate
NoiseTolerantTolerantNot relevantTolerant*Tolerant
Visual PresenceTolerantTolerantNot relevantTolerant*Tolerant
Abrasion & physical disturbanceIntermediateIntermediateHighIntermediateIntermediate
DisplacementIntermediateTolerantTolerantIntermediateHigh

Chemical factors

Obelia longissima
Important characterizing
Littorina littorea
Important characterizing
Ulva intestinalis
Important characterizing
Mytilus edulis
Important other
Semibalanus balanoides
Important other
Synthetic compound contaminationIntermediateLowIntermediateIntermediateIntermediate
Heavy metal contaminationIntermediateIntermediateLowIntermediateLow
Hydrocarbon contaminationInsufficient informationHighHighIntermediateIntermediate
Radionuclide contaminationInsufficient informationInsufficient informationInsufficient informationInsufficient informationInsufficient information
Changes in nutrient levelsTolerant*TolerantTolerant*IntermediateIntermediate
Increase in salinityInsufficient informationTolerantTolerantLowLow
Decrease in salinityIntermediateTolerantLow
Changes in oxygenationLowLowInsufficient informationLowIntermediate

Biological factors

Obelia longissima
Important characterizing
Littorina littorea
Important characterizing
Ulva intestinalis
Important characterizing
Mytilus edulis
Important other
Semibalanus balanoides
Important other
Introduction of microbial pathogens/parasitesLowInsufficient informationInsufficient informationIntermediateIntermediate
Introduction of non-native speciesInsufficient informationInsufficient informationNot relevantInsufficient informationIntermediate
Extraction of this speciesNot relevantIntermediateIntermediateIntermediateNot relevant
Extraction of other speciesNot relevantTolerantNot relevantLowIntermediate

Species used to indicate biotope recoverability

Physical factors

Obelia longissima
Important characterizing
Littorina littorea
Important characterizing
Ulva intestinalis
Important characterizing
Mytilus edulis
Important other
Semibalanus balanoides
Important other
Substratum LossVery highHighVery highHighHigh
SmotheringVery highHighVery highHighHigh
Increase in suspended sedimentVery highHighVery highImmediateVery high
Decrease in suspended sedimentImmediateNot relevantImmediate
DesiccationVery highImmediateVery highImmediateHigh
Increase in emergence regimeVery highImmediateNot relevantVery highHigh
Decrease in emergence regimeNot relevantVery highVery high
Increase in water flow rateVery highHighVery highVery highVery high
Decrease in water flow rateVery highNot relevantVery high
Increase in temperatureVery highImmediateNot relevantVery highHigh
Decrease in temperatureImmediateNot relevantVery high
Increase in turbidityImmediateVery highVery highNot relevantVery high
Decrease in turbidityImmediateNot relevantNot relevant
Increase in wave exposureImmediateHighVery highHighHigh
Decrease in wave exposureVery highNot relevantHigh
NoiseNot relevantNot relevantNot relevantNot relevantNot relevant
Visual PresenceNot relevantNot relevantNot relevantNot relevantNot relevant
Abrasion & physical disturbanceVery highHighVery highHighHigh
DisplacementVery highNot relevantNot relevantHighHigh

Chemical factors

Obelia longissima
Important characterizing
Littorina littorea
Important characterizing
Ulva intestinalis
Important characterizing
Mytilus edulis
Important other
Semibalanus balanoides
Important other
Synthetic compound contaminationVery highVery highHighHighModerate
Heavy metal contaminationVery highHighVery highHighHigh
Hydrocarbon contaminationNot relevantHighVery highHighModerate
Radionuclide contaminationNot relevantInsufficient informationNot relevantNot relevantNot relevant
Changes in nutrient levelsNot relevantNot relevantNot relevantHighHigh
Increase in salinityNot relevantNot relevantNot relevantVery highHigh
Decrease in salinityVery highNot relevantVery high
Changes in oxygenationImmediateVery highNot relevantVery highHigh

Biological factors

Obelia longissima
Important characterizing
Littorina littorea
Important characterizing
Ulva intestinalis
Important characterizing
Mytilus edulis
Important other
Semibalanus balanoides
Important other
Introduction of microbial pathogens/parasitesImmediateInsufficient informationNot relevantHighHigh
Introduction of non-native speciesNot relevantInsufficient informationNot relevantNot relevantHigh
Extraction of this speciesNot relevantHighVery highHighNot relevant
Extraction of other speciesNot relevantNot relevantNot relevantVery highHigh

This review can be cited as follows:

Marshall, C.E. 2005. Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 25/10/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=54&code=2004>