Biodiversity & Conservation

Sensitivity

Importance

Laminaria digitata, ascidians and bryozoans on tide-swept sublittoral fringe rock

IR.MIR.KR.Ldig.T

<i>%Laminaria digitata%</i>, ascidians and bryozoans on tide-swept sublittoral fringe rock

IR.MIR.KR.Ldig.T recorded () and expected () 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	High	Moderate	Major decline	High
Smothering	Tolerant	Not relevant	Not sensitive	Not relevant	Low
Increase in suspended sediment	Low	Very high	Very low	Decline	Low
Decrease in suspended sediment	Tolerant	Not relevant	Not sensitive	Not relevant	Moderate
Desiccation	High	High	Moderate	Not relevant	Low
Increase in emergence regime	Intermediate	High	Low	Major decline	Low
Decrease in emergence regime	Tolerant	Not relevant	Not sensitive	Not relevant	Not relevant
Increase in water flow rate	Tolerant*	Not relevant	Not sensitive*	Rise	Moderate
Decrease in water flow rate	High	High	Moderate	Major decline	Moderate
Increase in temperature	Intermediate	High	Low	Minor decline	Low
Decrease in temperature	Intermediate	High	Low	Minor decline	Low
Increase in turbidity	Intermediate	High	Low	Minor decline	Low
Decrease in turbidity	Tolerant*	Not relevant	Not sensitive*	Rise	Low
Increase in wave exposure	High	High	Moderate	No change	Very low
Decrease in wave exposure	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Noise	Tolerant	Not relevant	Not sensitive	Not relevant	High
Visual Presence	Tolerant	Not relevant	Not sensitive	Not relevant	High
Abrasion & physical disturbance	High	High	Moderate	Minor decline	Low
Displacement	High	High	Moderate	Major decline	Low

Chemical Factors

Click factor name to view rationale	Intolerance	Recoverability	Sensitivity	Species Richness	Evidence / Confidence
Synthetic compound contamination	High	High	Moderate	Decline	Moderate
Heavy metal contamination	Low	Very high	Very low	Minor decline	Moderate
Hydrocarbon contamination	Intermediate	High	Low	Minor decline	Moderate
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient Information	Not relevant
Changes in nutrient levels	Intermediate	High	Low	Minor decline	Moderate
Increase in salinity	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Decrease in salinity	Intermediate	High	Low	Minor decline	Low
Changes in oxygenation	Intermediate	High	Low	Minor decline	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	Insufficient information	Insufficient information	Insufficient information	Insufficient Information	Not relevant
Extraction of this species	Intermediate	High	Low	Decline	Low
Extraction of other species	Intermediate	High	Low	Decline	Low

Species used to indicate biotope intolerance

Physical factors

	Botryllus schlosseri Important characterizing	Corallina officinalis Important characterizing	Palmaria palmata Important characterizing	Laminaria digitata Key Structuring	Lithophyllum incrustans Important other
Substratum Loss	High	High	High	High	High
Smothering	High	Intermediate	Intermediate	Intermediate	Low
Increase in suspended sediment	High	Intermediate	Low	Intermediate	Low
Decrease in suspended sediment				Tolerant*	Tolerant*
Desiccation	Intermediate	High	Intermediate	Intermediate	High
Increase in emergence regime	Intermediate	Intermediate	Intermediate	Intermediate	High
Decrease in emergence regime				Tolerant*	Tolerant
Increase in water flow rate	Intermediate	Low	Intermediate	Low	Low
Decrease in water flow rate				Intermediate	Low
Increase in temperature	Low	Intermediate	Intermediate	Intermediate	Tolerant
Decrease in temperature				Intermediate	Tolerant
Increase in turbidity	Low	Low	Low	Intermediate	Low
Decrease in turbidity				Tolerant*	Tolerant*
Increase in wave exposure	Intermediate	Low	Intermediate	Low	Tolerant
Decrease in wave exposure					Low
Noise	Tolerant	Tolerant	Not relevant	Tolerant	Tolerant
Visual Presence	Tolerant	Tolerant	Not relevant	Tolerant	Tolerant
Abrasion & physical disturbance	Intermediate	Low	Intermediate	Intermediate	Intermediate
Displacement	High	Low	High	High	Low

Chemical factors

	Botryllus schlosseri Important characterizing	Corallina officinalis Important characterizing	Palmaria palmata Important characterizing	Laminaria digitata Key Structuring	Lithophyllum incrustans Important other
Synthetic compound contamination	Insufficient information	Intermediate	High	Intermediate	High
Heavy metal contamination	Insufficient information	Insufficient information	Intermediate	Intermediate	Insufficient information
Hydrocarbon contamination	Insufficient information	Low	High	Low	High
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Low	Low	Intermediate	Low	Low
Increase in salinity	Intermediate	Intermediate	Intermediate	Not relevant	Insufficient information
Decrease in salinity				Intermediate	Intermediate
Changes in oxygenation	Intermediate	Insufficient information	Low	Insufficient information	Insufficient information

Biological factors

	Botryllus schlosseri Important characterizing	Corallina officinalis Important characterizing	Palmaria palmata Important characterizing	Laminaria digitata Key Structuring	Lithophyllum incrustans Important other
Introduction of microbial pathogens/parasites	Insufficient information	Low	Insufficient information	Low	Insufficient information
Introduction of non-native species	Tolerant*	Not relevant	Not relevant	Low	Insufficient information
Extraction of this species	Not relevant	Intermediate	Intermediate	Intermediate	Not relevant
Extraction of other species	High	Intermediate	Intermediate	Intermediate	Intermediate

Species used to indicate biotope recoverability

Physical factors

	Botryllus schlosseri Important characterizing	Corallina officinalis Important characterizing	Palmaria palmata Important characterizing	Laminaria digitata Key Structuring	Lithophyllum incrustans Important other
Substratum Loss	High	High	High	High	Low
Smothering	High	Very high	High	High	Very high
Increase in suspended sediment	High	Very high	High	High	Very high
Decrease in suspended sediment				Not relevant	Not relevant
Desiccation	High	High	High	High	Low
Increase in emergence regime	High	Very high	High	High	Low
Decrease in emergence regime				Not relevant	Not relevant
Increase in water flow rate	High	Very high	High	High	Very high
Decrease in water flow rate				High	Very high
Increase in temperature	Very high	High	High	High	Not relevant
Decrease in temperature				High	Not relevant
Increase in turbidity	Immediate	Immediate	Very high	High	Very high
Decrease in turbidity				Not relevant	Not relevant
Increase in wave exposure	Moderate	Very high	High	High	Not relevant
Decrease in wave exposure					Immediate
Noise	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Visual Presence	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Abrasion & physical disturbance	High	High	High	High	High
Displacement	Moderate	High	High	High	Very high

Chemical factors

	Botryllus schlosseri Important characterizing	Corallina officinalis Important characterizing	Palmaria palmata Important characterizing	Laminaria digitata Key Structuring	Lithophyllum incrustans Important other
Synthetic compound contamination	Not relevant	High	High	High	Low
Heavy metal contamination	Not relevant	Insufficient information	High	High	Not relevant
Hydrocarbon contamination	Not relevant	Very high	High	High	High
Radionuclide contamination	Not relevant	Insufficient information	Insufficient information	Insufficient information	Not relevant
Changes in nutrient levels	High	Very high	High	High	High
Increase in salinity	High	High	High	None	Not relevant
Decrease in salinity				Very high	High
Changes in oxygenation	High	Insufficient information	Immediate	Insufficient information	Not relevant

Biological factors

	Botryllus schlosseri Important characterizing	Corallina officinalis Important characterizing	Palmaria palmata Important characterizing	Laminaria digitata Key Structuring	Lithophyllum incrustans Important other
Introduction of microbial pathogens/parasites	High	Very high	Not relevant	High	Not relevant
Introduction of non-native species	Not relevant	Not relevant	Not relevant	Insufficient information	Not relevant
Extraction of this species	Not relevant	High	High	High	Not relevant
Extraction of other species	Moderate	High	High	High	High

This review can be cited as follows:

Marshall, C.E. 2005. Laminaria digitata, ascidians and bryozoans on tide-swept sublittoral fringe rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 23/05/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=273&code=1997>

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Laminaria digitata, ascidians and bryozoans on tide-swept sublittoral fringe rock

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IR.MIR.KR.Ldig.T