Biodiversity & Conservation

Sensitivity

Importance

Ascophyllum nodosum, sponges and ascidians on tide-swept mid eulittoral rock

LR.HLR.FT.AscT

<i>%Ascophyllum nodosum%</i>, sponges and ascidians on tide-swept mid eulittoral rock

LR.HLR.FT.AscT 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	Low	High	Major decline	High
Smothering	Tolerant	Not relevant	Not sensitive	Not relevant	Not relevant
Increase in suspended sediment	Low	Very high	Very low	Minor decline	Moderate
Decrease in suspended sediment	Tolerant	Not relevant	Not sensitive	Not relevant	Moderate
Desiccation	Intermediate	Moderate	Moderate	Decline	Moderate
Increase in emergence regime	Intermediate	High	Low	Decline	Moderate
Decrease in emergence regime	Tolerant	Not relevant	Not sensitive	Not relevant	Moderate
Increase in water flow rate	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Decrease in water flow rate	Intermediate	High	Low	Decline	Moderate
Increase in temperature	Low	Very high	Very low	Minor decline	Low
Decrease in temperature	Low	Very high	Very low	Decline	Low
Increase in turbidity	Tolerant	Not relevant	Not sensitive	Not relevant	Not relevant
Decrease in turbidity	Tolerant*	Not relevant	Not sensitive*	Rise	Low
Increase in wave exposure	High	Low	High	Major decline	Moderate
Decrease in wave exposure	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Noise	Tolerant	Not relevant	Not sensitive	Not relevant	Not relevant
Visual Presence	Tolerant	Not relevant	Not sensitive	Not relevant	Not relevant
Abrasion & physical disturbance	Intermediate	High	Low	Decline	Low
Displacement	High	Low	High	Major decline	Moderate

Chemical Factors

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

Species used to indicate biotope intolerance

Physical factors

	Ascophyllum nodosum Key Structuring	Ascidiella scabra Important characterizing	Fucus serratus Important other	Fucus vesiculosus Important other	Patella vulgata Important other	Chondrus crispus Important other
Substratum Loss	High	High	High	Intermediate	High	High
Smothering	High	Low	High	High	High	Intermediate
Increase in suspended sediment	Low	Low	Low	Low	Low	Intermediate
Decrease in suspended sediment		Tolerant			Low	Tolerant
Desiccation	Intermediate	Intermediate	Intermediate	Intermediate	Low	Intermediate
Increase in emergence regime	High	Intermediate	Intermediate	Intermediate	Low	Intermediate
Decrease in emergence regime		Tolerant*				Tolerant
Increase in water flow rate	Intermediate	Low	Intermediate	Intermediate	Low	Intermediate
Decrease in water flow rate		Low				Intermediate
Increase in temperature	Low	Tolerant	Tolerant	Tolerant	Low	Low
Decrease in temperature		Tolerant				Low
Increase in turbidity	Low	Tolerant	Low	Low	Low	Low
Decrease in turbidity		Tolerant*				Tolerant*
Increase in wave exposure	High	Intermediate	High	Intermediate	Low	Intermediate
Decrease in wave exposure		Tolerant*				Low
Noise	Tolerant	Tolerant	Tolerant	Tolerant	Low	Tolerant
Visual Presence	Tolerant	Tolerant	Tolerant	Tolerant	Tolerant	Tolerant
Abrasion & physical disturbance	High	High	Intermediate	Intermediate	Low	Low
Displacement	High	High	High	High	Intermediate	High

Chemical factors

	Ascophyllum nodosum Key Structuring	Ascidiella scabra Important characterizing	Fucus serratus Important other	Fucus vesiculosus Important other	Patella vulgata Important other	Chondrus crispus Important other
Synthetic compound contamination	Intermediate	Intermediate	High	Intermediate	High	High
Heavy metal contamination	Low	Insufficient information	Low	Low	Intermediate	Insufficient information
Hydrocarbon contamination	Low	Insufficient information	Intermediate	Low	High	Low
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Intermediate	Insufficient information	Intermediate	Intermediate	Low	Intermediate
Increase in salinity	Low	Tolerant	Low	Low	Low	Tolerant
Decrease in salinity		Intermediate				Low
Changes in oxygenation	Insufficient information	Low	Low	Insufficient information	Intermediate	Insufficient information

Biological factors

	Ascophyllum nodosum Key Structuring	Ascidiella scabra Important characterizing	Fucus serratus Important other	Fucus vesiculosus Important other	Patella vulgata Important other	Chondrus crispus Important other
Introduction of microbial pathogens/parasites	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Intermediate
Introduction of non-native species	Insufficient information	Tolerant	Insufficient information	Insufficient information	Not relevant	Insufficient information
Extraction of this species	Intermediate	Not relevant	Intermediate	Intermediate	Intermediate	Intermediate
Extraction of other species	Tolerant	Not relevant	Tolerant	Insufficient information	Low	Insufficient information

Species used to indicate biotope recoverability

Physical factors

	Ascophyllum nodosum Key Structuring	Ascidiella scabra Important characterizing	Fucus serratus Important other	Fucus vesiculosus Important other	Patella vulgata Important other	Chondrus crispus Important other
Substratum Loss	Low	Very high	High	High	High	High
Smothering	Low	Immediate	High	High	High	High
Increase in suspended sediment	Immediate	Immediate	Very high	Immediate	High	High
Decrease in suspended sediment		Not relevant			High	Not relevant
Desiccation	Moderate	Very high	High	High	High	High
Increase in emergence regime	Low	Very high	High	High	High	High
Decrease in emergence regime		Not relevant				Not relevant
Increase in water flow rate	Low	Immediate	High	High	High	High
Decrease in water flow rate		Immediate				High
Increase in temperature	Moderate	Not relevant	Not relevant	Not relevant	High	Very high
Decrease in temperature		Not relevant				Very high
Increase in turbidity	Immediate	Not relevant	Very high	Immediate	Very high	Very high
Decrease in turbidity		Not relevant				Not relevant
Increase in wave exposure	Low	Very high	High	High	High	High
Decrease in wave exposure		Not relevant				Very high
Noise	Not relevant	Not relevant	Not relevant	Not relevant	High	Not relevant
Visual Presence	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Abrasion & physical disturbance	Low	Very high	High	High	Very high	Very high
Displacement	Low	Very high	High	High	High	High

Chemical factors

	Ascophyllum nodosum Key Structuring	Ascidiella scabra Important characterizing	Fucus serratus Important other	Fucus vesiculosus Important other	Patella vulgata Important other	Chondrus crispus Important other
Synthetic compound contamination	Low	Very high	High	High	High	High
Heavy metal contamination	High	Not relevant	High	High	High	Insufficient information
Hydrocarbon contamination	Moderate	Not relevant	High	High	High	Very high
Radionuclide contamination	Insufficient information	Not relevant	Insufficient information	Not relevant	Insufficient information	Insufficient information
Changes in nutrient levels	High	Not relevant	High	High	High	High
Increase in salinity	High	Not relevant	Very high	High	High	Not relevant
Decrease in salinity		Very high				Very high
Changes in oxygenation	Insufficient information	Immediate	Very high	Not relevant	High	Insufficient information

Biological factors

	Ascophyllum nodosum Key Structuring	Ascidiella scabra Important characterizing	Fucus serratus Important other	Fucus vesiculosus Important other	Patella vulgata Important other	Chondrus crispus Important other
Introduction of microbial pathogens/parasites	Not relevant	Not relevant	Insufficient information	Not relevant	Insufficient information	High
Introduction of non-native species	Not relevant	Not relevant	Insufficient information	Not relevant	Not relevant	Insufficient information
Extraction of this species	Low	Not relevant	High	High	High	High
Extraction of other species	Not relevant	Not relevant	Not relevant	Not relevant	High	Insufficient information

This review can be cited as follows:

Marshall, C.E. 2005. Ascophyllum nodosum, sponges and ascidians on tide-swept mid eulittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 20/05/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=100&code=2004>

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Ascophyllum nodosum, sponges and ascidians on tide-swept mid eulittoral rock

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LR.HLR.FT.AscT