Biodiversity & Conservation

Sensitivity

Importance

Venerupis senegalensis and Mya truncata in lower shore or infralittoral muddy gravel

SS.SMx.IMx.VsenAsquAps

<i>%Venerupis senegalensis%</i> and <i>%Mya truncata%</i> in lower shore or infralittoral muddy gravel

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

Chemical Factors

Click factor name to view rationale	Intolerance	Recoverability	Sensitivity	Species Richness	Evidence / Confidence
Synthetic compound contamination	High	High	Moderate	Decline	Very low
Heavy metal contamination	High	High	Moderate	Decline	High
Hydrocarbon contamination	Intermediate	Moderate	Moderate	Minor decline	Moderate
Radionuclide contamination	Insufficient information	Not relevant	Insufficient information	Insufficient Information	Not relevant
Changes in nutrient levels	Intermediate	High	Low	No change	Low
Increase in salinity	Tolerant	Not relevant	Not sensitive	No change	High
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	Intermediate	High	Low		High
Introduction of non-native species	Intermediate	Very low / none	High	Minor decline	Very low
Extraction of this species	Intermediate	High	Low	Minor decline	High
Extraction of other species	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant

Species used to indicate biotope intolerance

Physical factors

	Venerupis senegalensis Important characterizing	Littorina littorea Important other	Arenicola marina Important other
Substratum Loss	High	High	High
Smothering	Intermediate	High	Tolerant
Increase in suspended sediment	Low	Intermediate	Low
Decrease in suspended sediment	Low
Desiccation	Low	Low	Not relevant
Increase in emergence regime	Intermediate	Low	Intermediate
Decrease in emergence regime	Tolerant
Increase in water flow rate	Intermediate	Intermediate	Intermediate
Decrease in water flow rate	Tolerant
Increase in temperature	Low	Low	Intermediate
Decrease in temperature	Intermediate
Increase in turbidity	Low	Low	Low
Decrease in turbidity	Tolerant
Increase in wave exposure	Intermediate	Intermediate	Intermediate
Decrease in wave exposure	Tolerant
Noise	Tolerant	Tolerant	Tolerant
Visual Presence	Tolerant	Tolerant	Tolerant
Abrasion & physical disturbance	Intermediate	Intermediate	Intermediate
Displacement	Intermediate	Tolerant	Low

Chemical factors

	Venerupis senegalensis Important characterizing	Littorina littorea Important other	Arenicola marina Important other
Synthetic compound contamination	High	Low	High
Heavy metal contamination	High	Intermediate	Low
Hydrocarbon contamination	Intermediate	High	Intermediate
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Intermediate	Tolerant	Intermediate
Increase in salinity	Tolerant	Tolerant	Low
Decrease in salinity	Intermediate
Changes in oxygenation	Intermediate	Low	Low

Biological factors

	Venerupis senegalensis Important characterizing	Littorina littorea Important other	Arenicola marina Important other
Introduction of microbial pathogens/parasites	Intermediate	Insufficient information	Insufficient information
Introduction of non-native species	Insufficient information	Insufficient information	Insufficient information
Extraction of this species	Intermediate	Intermediate	Intermediate
Extraction of other species	Intermediate	Tolerant	Intermediate

Species used to indicate biotope recoverability

Physical factors

	Venerupis senegalensis Important characterizing	Littorina littorea Important other	Arenicola marina Important other
Substratum Loss	High	High	High
Smothering	High	High	Not relevant
Increase in suspended sediment	Very high	High	Immediate
Decrease in suspended sediment	Very high
Desiccation	Very high	Immediate	Not relevant
Increase in emergence regime	High	Immediate	Very high
Decrease in emergence regime	Not relevant
Increase in water flow rate	High	High	Very high
Decrease in water flow rate	Not relevant
Increase in temperature	Very high	Immediate	Very high
Decrease in temperature	High
Increase in turbidity	Very high	Very high	Immediate
Decrease in turbidity	Not relevant
Increase in wave exposure	High	High	Very high
Decrease in wave exposure	Not relevant
Noise	Not relevant	Not relevant	Not relevant
Visual Presence	Not relevant	Not relevant	Not relevant
Abrasion & physical disturbance	High	High	Very high
Displacement	High	Not relevant	Immediate

Chemical factors

	Venerupis senegalensis Important characterizing	Littorina littorea Important other	Arenicola marina Important other
Synthetic compound contamination	High	Very high	High
Heavy metal contamination	High	High	Very high
Hydrocarbon contamination	High	High	High
Radionuclide contamination	Not relevant	Insufficient information	Not relevant
Changes in nutrient levels	High	Not relevant	High
Increase in salinity	Not relevant	Not relevant	Immediate
Decrease in salinity	High
Changes in oxygenation	High	Very high	Immediate

Biological factors

	Venerupis senegalensis Important characterizing	Littorina littorea Important other	Arenicola marina Important other
Introduction of microbial pathogens/parasites	High	Insufficient information	Not relevant
Introduction of non-native species	Not relevant	Insufficient information	Not relevant
Extraction of this species	High	High	Very high
Extraction of other species	High	Not relevant	Very high

This review can be cited as follows:

Rayment, W.J. 2001. Venerupis senegalensis and Mya truncata in lower shore or infralittoral muddy gravel. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 19/06/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=354&code=2004>

for
Venerupis senegalensis and Mya truncata in lower shore or infralittoral muddy gravel

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SS.SMx.IMx.VsenAsquAps