Biodiversity & Conservation

Sensitivity

Neocrania anomala and Protanthea simplex on very sheltered circalittoral rock

CR.LCR.BrAs.NeoPro

Image Sue Scott - Circalittoral cliff face with dense brachiopods Neocrania anomala and Terebratulina retusa, the anemone Protanthea simplex and the ascidian Ciona intestinalis. Loch Duich, Highland. Image width ca 1 m.
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CR.LCR.BrAs.NeoPro 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	Moderate	Moderate	Major decline	Low
Smothering	High	Moderate	Moderate	Major decline	Moderate
Increase in suspended sediment	Low	Very high	Very low	Minor decline	Moderate
Decrease in suspended sediment
Desiccation	Not relevant	Not relevant	Not relevant	Not relevant	High
Increase in emergence regime	Not relevant	Not relevant	Not relevant	Not relevant	High
Decrease in emergence regime
Increase in water flow rate	High	Moderate	Moderate	Major decline	Low
Decrease in water flow rate
Increase in temperature	High	Moderate	Moderate	Major decline	Low
Decrease in temperature
Increase in turbidity	Tolerant	Not relevant	Not sensitive	No change	Low
Decrease in turbidity
Increase in wave exposure	Not relevant	Not relevant	Not relevant	Not relevant	Moderate
Decrease in wave exposure
Noise	Tolerant	Not relevant	Not sensitive	No change	High
Visual Presence	Tolerant	Not relevant	Not sensitive	No change	High
Abrasion & physical disturbance	High	Moderate	Moderate	Major decline	High
Displacement	High	Moderate	Moderate	Major decline	High

Chemical Factors

Click factor name to view rationale	Intolerance	Recoverability	Sensitivity	Species Richness	Evidence / Confidence
Synthetic compound contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient Information	Not relevant
Heavy metal contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient Information	Not relevant
Hydrocarbon contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient Information	Not relevant
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information	Insufficient Information	Not relevant
Changes in nutrient levels	Tolerant	Not relevant	Not sensitive	No change	Moderate
Increase in salinity	Intermediate	High	Low	Decline	Low
Decrease in salinity
Changes in oxygenation	Intermediate	High	Low	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	Not relevant	Not relevant	Not relevant	Not relevant	Low
Extraction of other species	Not relevant	Not relevant	Not relevant	Not relevant	Low

Species used to indicate biotope intolerance

Physical factors

	Neocrania anomala Important characterizing	Protanthea simplex Important characterizing	Ciona intestinalis Important characterizing
Substratum Loss	High	High	High
Smothering	High	High	Intermediate
Increase in suspended sediment	Low	Low	Low
Decrease in suspended sediment
Desiccation	Not relevant	High	Intermediate
Increase in emergence regime	Not relevant	High	High
Decrease in emergence regime
Increase in water flow rate	High	Intermediate	Low
Decrease in water flow rate
Increase in temperature	Intermediate	High	Intermediate
Decrease in temperature
Increase in turbidity	Tolerant	Tolerant	Tolerant
Decrease in turbidity
Increase in wave exposure	High	High	Intermediate
Decrease in wave exposure
Noise	Low	Tolerant	Tolerant
Visual Presence	Low	Tolerant	Tolerant
Abrasion & physical disturbance	Intermediate	High	High
Displacement	High	Low	High

Chemical factors

	Neocrania anomala Important characterizing	Protanthea simplex Important characterizing	Ciona intestinalis Important characterizing
Synthetic compound contamination	Insufficient information	Insufficient information	Insufficient information
Heavy metal contamination	Insufficient information	Insufficient information	Insufficient information
Hydrocarbon contamination	Insufficient information	Insufficient information	Insufficient information
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Insufficient information	Insufficient information	Tolerant*
Increase in salinity	Tolerant	Intermediate	Low
Decrease in salinity
Changes in oxygenation	Low	Intermediate	Low

Biological factors

	Neocrania anomala Important characterizing	Protanthea simplex Important characterizing	Ciona intestinalis Important characterizing
Introduction of microbial pathogens/parasites	Insufficient information	Insufficient information	Insufficient information
Introduction of non-native species	Insufficient information	Insufficient information	Intermediate
Extraction of this species	Not relevant	Not relevant	Not relevant
Extraction of other species	Tolerant	Intermediate	Tolerant

Species used to indicate biotope recoverability

Physical factors

	Neocrania anomala Important characterizing	Protanthea simplex Important characterizing	Ciona intestinalis Important characterizing
Substratum Loss	Moderate	Moderate	High
Smothering	Moderate	Moderate	Very high
Increase in suspended sediment	Very high	Very high	Immediate
Decrease in suspended sediment
Desiccation	Not relevant	Moderate	Very high
Increase in emergence regime	Not relevant	Moderate	High
Decrease in emergence regime
Increase in water flow rate	Moderate	High	Immediate
Decrease in water flow rate
Increase in temperature	High	Moderate	Very high
Decrease in temperature
Increase in turbidity	Not relevant	Not relevant	Not relevant
Decrease in turbidity
Increase in wave exposure	Moderate	Moderate	Very high
Decrease in wave exposure
Noise	Very high	Not relevant	Not relevant
Visual Presence	Very high	Not relevant	Not relevant
Abrasion & physical disturbance	High	Moderate	High
Displacement	Moderate	Very high	High

Chemical factors

	Neocrania anomala Important characterizing	Protanthea simplex Important characterizing	Ciona intestinalis Important characterizing
Synthetic compound contamination	Insufficient information	Insufficient information	Insufficient information
Heavy metal contamination	Insufficient information	Insufficient information	Insufficient information
Hydrocarbon contamination	Insufficient information	Insufficient information	Insufficient information
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Insufficient information	Insufficient information	Not relevant
Increase in salinity	Not relevant	High	Immediate
Decrease in salinity
Changes in oxygenation	Very high	High	Immediate

Biological factors

	Neocrania anomala Important characterizing	Protanthea simplex Important characterizing	Ciona intestinalis Important characterizing
Introduction of microbial pathogens/parasites	Insufficient information	Insufficient information	Insufficient information
Introduction of non-native species	Insufficient information	Insufficient information	Very high
Extraction of this species	Not relevant	Not relevant	Not relevant
Extraction of other species	Not relevant	High	Not relevant

This review can be cited as follows:

Jackson, A. 2005. Neocrania anomala and Protanthea simplex on very sheltered circalittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 25/05/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=5&code=2004>

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Neocrania anomala and Protanthea simplex on very sheltered circalittoral rock

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CR.LCR.BrAs.NeoPro