Biodiversity & Conservation

Fucus distichus and Fucus spiralis f. nana on extremely exposed upper shore rock

LR.HLR.FR.Fdis


ELR.Fdis

Image Sue Scott - View down shore showing upper shore bedrock with Fucus distichus and green algae. Image width ca XX cm.
Image copyright information

Distribution map

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

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 Low Very high Very low No change Moderate
Hydrocarbon contamination Low High Low Minor decline Low
Radionuclide contamination Insufficient information Insufficient information Insufficient information Not relevant Not relevant
Changes in nutrient levels Low Very high Very low No change Moderate
Increase in salinity High High Moderate Major decline Low
Decrease in salinity Low High Low Minor decline Moderate
Changes in oxygenation Low Immediate Not sensitive No change Moderate

Biological Factors

Click factor name to view rationale Intolerance Recoverability Sensitivity Species Richness Evidence / Confidence
Introduction of microbial pathogens/parasites Low High Low Low
Introduction of non-native species Not relevant Not relevant Not relevant No change Moderate
Extraction of this species Not relevant Not relevant Not relevant Not relevant Not relevant
Extraction of other species Low High Low No change Moderate

Species used to indicate biotope intolerance

Physical factors

Fucus distichus
Key structural
Fucus spiralis
Key structural
Substratum LossHighHigh
SmotheringHighHigh
Increase in suspended sedimentLowLow
Decrease in suspended sediment
DesiccationHighHigh
Increase in emergence regimeHighHigh
Decrease in emergence regime
Increase in water flow rateLowIntermediate
Decrease in water flow rate
Increase in temperatureHighLow
Decrease in temperature
Increase in turbidityLowLow
Decrease in turbidity
Increase in wave exposureIntermediateHigh
Decrease in wave exposure
NoiseTolerantTolerant
Visual PresenceTolerantTolerant
Abrasion & physical disturbanceIntermediateIntermediate
DisplacementHighHigh

Chemical factors

Fucus distichus
Key structural
Fucus spiralis
Key structural
Synthetic compound contaminationInsufficient informationInsufficient information
Heavy metal contaminationLowIntermediate
Hydrocarbon contaminationInsufficient informationHigh
Radionuclide contaminationInsufficient informationInsufficient information
Changes in nutrient levelsInsufficient informationIntermediate
Increase in salinityLowIntermediate
Decrease in salinity
Changes in oxygenationInsufficient informationInsufficient information

Biological factors

Fucus distichus
Key structural
Fucus spiralis
Key structural
Introduction of microbial pathogens/parasitesInsufficient informationInsufficient information
Introduction of non-native speciesInsufficient informationInsufficient information
Extraction of this speciesIntermediateIntermediate
Extraction of other speciesInsufficient informationInsufficient information

Species used to indicate biotope recoverability

Physical factors

Fucus distichus
Key structural
Fucus spiralis
Key structural
Substratum LossHighHigh
SmotheringHighHigh
Increase in suspended sedimentVery highVery high
Decrease in suspended sediment
DesiccationHighHigh
Increase in emergence regimeHighHigh
Decrease in emergence regime
Increase in water flow rateHighHigh
Decrease in water flow rate
Increase in temperatureHighNot relevant
Decrease in temperature
Increase in turbidityVery highHigh
Decrease in turbidity
Increase in wave exposureHighHigh
Decrease in wave exposure
NoiseNot relevantNot relevant
Visual PresenceNot relevantNot relevant
Abrasion & physical disturbanceHighHigh
DisplacementHighHigh

Chemical factors

Fucus distichus
Key structural
Fucus spiralis
Key structural
Synthetic compound contaminationNot relevantNot relevant
Heavy metal contaminationVery highHigh
Hydrocarbon contaminationNot relevantHigh
Radionuclide contaminationNot relevantNot relevant
Changes in nutrient levelsNot relevantHigh
Increase in salinityHighVery high
Decrease in salinity
Changes in oxygenationNot relevantNot relevant

Biological factors

Fucus distichus
Key structural
Fucus spiralis
Key structural
Introduction of microbial pathogens/parasitesNot relevantNot relevant
Introduction of non-native speciesNot relevantNot relevant
Extraction of this speciesHighHigh
Extraction of other speciesNot relevantNot relevant

This review can be cited as follows:

Hill, J.M. 2005. Fucus distichus and Fucus spiralis f. nana on extremely exposed upper shore rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 22/07/2014]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=234&code=2004>