Biodiversity & Conservation

Sensitivity

Bugula spp. and other bryozoans on vertical moderately exposed circalittoral rock

CR.C.FaV.Bug

Image Rohan Holt - Bugula spp. and other bryozoans on vertical moderately exposed circalittoral rock Image width ca XX m.
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CR.C.FaV.Bug 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	Moderate
Smothering	High	High	Moderate	Decline	Moderate
Increase in suspended sediment	Low	Very high	Very low	Minor decline	Low
Decrease in suspended sediment	Low	Very high	Very low	Minor decline	Low
Desiccation	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Increase in emergence regime	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Decrease in emergence regime	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Increase in water flow rate	Intermediate	High	Low	Decline	Low
Decrease in water flow rate	High	High	Moderate	Decline	Low
Increase in temperature	Low	Very high	Very low	Minor decline	Low
Decrease in temperature	Low	Very high	Very low	Minor decline	Low
Increase in turbidity	Low	Very high	Very low	Minor decline	Low
Decrease in turbidity	Intermediate	High	Low	Minor decline	Low
Increase in wave exposure	Intermediate	High	Low	Minor decline	Low
Decrease in wave exposure	High	High	Moderate	Decline	Low
Noise	Tolerant	Not relevant	Not sensitive	Not relevant	Not relevant
Visual Presence	Tolerant	Not relevant	Not sensitive	Not relevant	Low
Abrasion & physical disturbance	Intermediate	High	Low	Decline	Moderate
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	Major decline	Low
Heavy metal contamination	Low	Very high	Very low	Minor decline	Low
Hydrocarbon contamination	High	High	Moderate	Major decline	Low
Radionuclide contamination	Insufficient information	Not relevant	Insufficient information	Insufficient Information	Not relevant
Changes in nutrient levels	Intermediate	High	Low	Decline	Low
Increase in salinity	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Decrease in salinity	High	High	Moderate	Not relevant	Not relevant
Changes in oxygenation	Intermediate	High	Low	Major decline	Very low

Biological Factors

Click factor name to view rationale	Intolerance	Recoverability	Sensitivity	Species Richness	Evidence / Confidence
Introduction of microbial pathogens/parasites	Intermediate	High	Low		Low
Introduction of non-native species	Insufficient information	Not relevant	Insufficient information	Insufficient Information	Not relevant
Extraction of this species	Low	Very high	Very low	No change	Low
Extraction of other species	Intermediate	High	Low	Minor decline	Low

Species used to indicate biotope intolerance

Physical factors

	Bugula turbinata Important characterizing	Nemertesia ramosa Important structural	Clavelina lepadiformis Important structural	Morchellium argus Important structural	Echinus esculentus Important functional	Asterias rubens Important functional
Substratum Loss	High	High	High	High	High	High
Smothering	High	Intermediate	High	High	Intermediate	Low
Increase in suspended sediment	Intermediate	Intermediate	Intermediate	Low	Low	Low
Decrease in suspended sediment	Tolerant*
Desiccation	High	High	High	High	Intermediate	High
Increase in emergence regime	Intermediate	High	High	Intermediate	Low	Tolerant
Decrease in emergence regime	Tolerant*
Increase in water flow rate	Intermediate	Intermediate	Low	Low	Low	Intermediate
Decrease in water flow rate	High
Increase in temperature	Tolerant	Insufficient information	Intermediate	Low	Intermediate	High
Decrease in temperature	Intermediate			Intermediate		Low
Increase in turbidity	Low	Tolerant	Tolerant	Low	Low	Low
Decrease in turbidity	Tolerant
Increase in wave exposure	Intermediate	High	Intermediate	Low	Low	Intermediate
Decrease in wave exposure	Tolerant*					Low
Noise	Tolerant	Tolerant	Tolerant	Tolerant	Tolerant	Tolerant
Visual Presence	Tolerant	Tolerant	Tolerant	Tolerant	Low	Tolerant
Abrasion & physical disturbance	Intermediate	Intermediate	High	Intermediate	Intermediate	Intermediate
Displacement	High	High	High	High	Low	Low

Chemical factors

	Bugula turbinata Important characterizing	Nemertesia ramosa Important structural	Clavelina lepadiformis Important structural	Morchellium argus Important structural	Echinus esculentus Important functional	Asterias rubens Important functional
Synthetic compound contamination	High	Insufficient information	Insufficient information	Insufficient information	High	Intermediate
Heavy metal contamination	Low	Insufficient information	Tolerant	Insufficient information	High	Intermediate
Hydrocarbon contamination	High	Insufficient information	Insufficient information	Insufficient information	High	High
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Low	Insufficient information	Insufficient information	Tolerant	Tolerant*	Low
Increase in salinity	Not relevant	Insufficient information	Low	Intermediate	Intermediate	High
Decrease in salinity	Intermediate
Changes in oxygenation	Insufficient information	Insufficient information	Low	Insufficient information	Intermediate	High

Biological factors

	Bugula turbinata Important characterizing	Nemertesia ramosa Important structural	Clavelina lepadiformis Important structural	Morchellium argus Important structural	Echinus esculentus Important functional	Asterias rubens Important functional
Introduction of microbial pathogens/parasites	Insufficient information	Insufficient information	Insufficient information	Insufficient information	Intermediate	Intermediate
Introduction of non-native species	Insufficient information	Insufficient information	Tolerant	Insufficient information	Not relevant	Insufficient information
Extraction of this species	Not relevant	Not relevant	Not relevant	Intermediate	Intermediate	Not relevant
Extraction of other species	Not relevant	Tolerant	Tolerant	Intermediate	Intermediate	Low

Species used to indicate biotope recoverability

Physical factors

	Bugula turbinata Important characterizing	Nemertesia ramosa Important structural	Clavelina lepadiformis Important structural	Morchellium argus Important structural	Echinus esculentus Important functional	Asterias rubens Important functional
Substratum Loss	High	Moderate	Moderate	High	High	High
Smothering	High	Very high	Moderate	High	High	Very high
Increase in suspended sediment	Very high	Immediate	High	High	Very high	High
Decrease in suspended sediment	Not relevant
Desiccation	High	Moderate	Moderate	High	High	High
Increase in emergence regime	Very high	Moderate	Moderate	High	Very high	Not relevant
Decrease in emergence regime	Not relevant
Increase in water flow rate	Very high	High	Very high	High	Very high	High
Decrease in water flow rate	Very high
Increase in temperature	Not relevant	Insufficient information	High	Very high	High	High
Decrease in temperature	Very high			High		High
Increase in turbidity	Immediate	Not relevant	Not relevant	High	Very high	Very high
Decrease in turbidity	Not relevant
Increase in wave exposure	Very high	Moderate	High	High	Very high	High
Decrease in wave exposure	Not relevant					High
Noise	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant	Not relevant
Visual Presence	Not relevant	Not relevant	Not relevant	Not relevant	Immediate	Not relevant
Abrasion & physical disturbance	Very high	High	Moderate	High	High	High
Displacement	High	Moderate	Moderate	High	Very high	Immediate

Chemical factors

	Bugula turbinata Important characterizing	Nemertesia ramosa Important structural	Clavelina lepadiformis Important structural	Morchellium argus Important structural	Echinus esculentus Important functional	Asterias rubens Important functional
Synthetic compound contamination	High	Insufficient information	Not relevant	Not relevant	High	High
Heavy metal contamination	Immediate	Insufficient information	Not relevant	Not relevant	High	High
Hydrocarbon contamination	High	Insufficient information	Not relevant	Not relevant	High	High
Radionuclide contamination	Not relevant	Insufficient information	Not relevant	Not relevant	Insufficient information	Insufficient information
Changes in nutrient levels	Immediate	Insufficient information	Not relevant	Not relevant	Not relevant	High
Increase in salinity	Not relevant	Insufficient information	Immediate	High	High	High
Decrease in salinity	Very high
Changes in oxygenation	Not relevant	Insufficient information	Immediate	Not relevant	High	High

Biological factors

	Bugula turbinata Important characterizing	Nemertesia ramosa Important structural	Clavelina lepadiformis Important structural	Morchellium argus Important structural	Echinus esculentus Important functional	Asterias rubens Important functional
Introduction of microbial pathogens/parasites	Not relevant	Insufficient information	Not relevant	Not relevant	High	High
Introduction of non-native species	Not relevant	Insufficient information	Not relevant	Not relevant	Not relevant	Insufficient information
Extraction of this species	Not relevant	Not relevant	Not relevant	High	High	Not relevant
Extraction of other species	Not relevant	Not relevant	Not relevant	High	High	High

This review can be cited as follows:

Tyler-Walters, H. 2002. Bugula spp. and other bryozoans on vertical moderately exposed circalittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 24/05/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=105&code=1997>

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Bugula spp. and other bryozoans on vertical moderately exposed circalittoral rock

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CR.C.FaV.Bug