Biodiversity & Conservation

Sensitivity

Rhodothamniella floridula on sand-scoured lower eulittoral rock

LR.MLR.Eph.Rho

Image Kate Northen - Sand tolerant red algae on lower shore. Image width ca 60 cm (foreground).
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LR.MLR.Eph.Rho 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	High	High	Moderate	Major decline	High
Increase in suspended sediment	High	High	Moderate	Major decline	High
Decrease in suspended sediment	Low	High	Low	No change	Low
Desiccation	Intermediate	High	Low	No change	Moderate
Increase in emergence regime	Intermediate	High	Low	No change	Low
Decrease in emergence regime	Intermediate	High	Low	Decline	Low
Increase in water flow rate	Tolerant	Not relevant	Not sensitive	Decline	High
Decrease in water flow rate	Tolerant	Not relevant	Not sensitive	Decline	Moderate
Increase in temperature	Low	Very high	Very low	No change	High
Decrease in temperature	Intermediate	High	Low	Decline	Moderate
Increase in turbidity	Intermediate	High	Low	Decline	Moderate
Decrease in turbidity	Tolerant*	Not relevant	Not sensitive*	No change	Moderate
Increase in wave exposure	High	High	Moderate	Major decline	High
Decrease in wave exposure	High	High	Moderate	No change	Moderate
Noise	Tolerant	Not relevant	Not sensitive	No change	High
Visual Presence	Tolerant	Not relevant	Not sensitive	No change	High
Abrasion & physical disturbance	Intermediate	High	Low	Decline	Moderate
Displacement	High	High	Moderate	Major decline	High

Chemical Factors

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

Biological Factors

Click factor name to view rationale	Intolerance	Recoverability	Sensitivity	Species Richness	Evidence / Confidence
Introduction of microbial pathogens/parasites	Insufficient information	Not relevant	Insufficient information	Not relevant	Not relevant
Introduction of non-native species	Insufficient information	Not relevant	Insufficient information	Insufficient Information	Not relevant
Extraction of this species	Intermediate	High	Low	Decline	Low
Extraction of other species	Insufficient information	Not relevant	Insufficient information	Not relevant	Not relevant

Species used to indicate biotope intolerance

Physical factors

	Rhodothamniella floridula Important characterizing	Patella vulgata Important functional	Fucus serratus Important other
Substratum Loss	High	High	High
Smothering	High	High	High
Increase in suspended sediment	Intermediate	Low	Low
Decrease in suspended sediment	Low	Low
Desiccation	Intermediate	Low	Intermediate
Increase in emergence regime	Intermediate	Low	Intermediate
Decrease in emergence regime	Tolerant
Increase in water flow rate	Tolerant	Low	Intermediate
Decrease in water flow rate	Low
Increase in temperature	Low	Low	Tolerant
Decrease in temperature	Low
Increase in turbidity	Intermediate	Low	Low
Decrease in turbidity	Tolerant
Increase in wave exposure	Intermediate	Low	High
Decrease in wave exposure	Tolerant
Noise	Tolerant	Low	Tolerant
Visual Presence	Tolerant	Tolerant	Tolerant
Abrasion & physical disturbance	Intermediate	Low	Intermediate
Displacement	High	Intermediate	High

Chemical factors

	Rhodothamniella floridula Important characterizing	Patella vulgata Important functional	Fucus serratus Important other
Synthetic compound contamination	High	High	High
Heavy metal contamination	Insufficient information	Intermediate	Low
Hydrocarbon contamination	High	High	Intermediate
Radionuclide contamination	Insufficient information	Insufficient information	Insufficient information
Changes in nutrient levels	Intermediate	Low	Intermediate
Increase in salinity	Not relevant	Low	Low
Decrease in salinity	High
Changes in oxygenation	Insufficient information	Intermediate	Low

Biological factors

	Rhodothamniella floridula Important characterizing	Patella vulgata Important functional	Fucus serratus Important other
Introduction of microbial pathogens/parasites	Insufficient information	Insufficient information	Insufficient information
Introduction of non-native species	Insufficient information	Not relevant	Insufficient information
Extraction of this species	Not relevant	Intermediate	Intermediate
Extraction of other species	Insufficient information	Low	Tolerant

Species used to indicate biotope recoverability

Physical factors

	Rhodothamniella floridula Important characterizing	Patella vulgata Important functional	Fucus serratus Important other
Substratum Loss	High	High	High
Smothering	High	High	High
Increase in suspended sediment	Very high	High	Very high
Decrease in suspended sediment	Very high	High
Desiccation	Very high	High	High
Increase in emergence regime	High	High	High
Decrease in emergence regime	Not relevant
Increase in water flow rate	Not relevant	High	High
Decrease in water flow rate	Very high
Increase in temperature	Very high	High	Not relevant
Decrease in temperature	Very high
Increase in turbidity	High	Very high	Very high
Decrease in turbidity	Not relevant
Increase in wave exposure	High	High	High
Decrease in wave exposure	Not relevant
Noise	Not relevant	High	Not relevant
Visual Presence	Not relevant	Not relevant	Not relevant
Abrasion & physical disturbance	High	Very high	High
Displacement	High	High	High

Chemical factors

	Rhodothamniella floridula Important characterizing	Patella vulgata Important functional	Fucus serratus Important other
Synthetic compound contamination	High	High	High
Heavy metal contamination	Not relevant	High	High
Hydrocarbon contamination	High	High	High
Radionuclide contamination	Not relevant	Insufficient information	Insufficient information
Changes in nutrient levels	High	High	High
Increase in salinity	Not relevant	High	Very high
Decrease in salinity	High
Changes in oxygenation	Not relevant	High	Very high

Biological factors

	Rhodothamniella floridula Important characterizing	Patella vulgata Important functional	Fucus serratus Important other
Introduction of microbial pathogens/parasites	Not relevant	Insufficient information	Insufficient information
Introduction of non-native species	Not relevant	Not relevant	Insufficient information
Extraction of this species	Not relevant	High	High
Extraction of other species	Insufficient information	High	Not relevant

This review can be cited as follows:

Riley, K. 2002. Rhodothamniella floridula on sand-scoured lower eulittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 18/06/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=12&code=1997>

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Rhodothamniella floridula on sand-scoured lower eulittoral rock

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LR.MLR.Eph.Rho