Biodiversity & Conservation

Chrysophyceae on vertical upper littoral fringe soft rock

LR.FLR.CvOv.ChrHap

LR.Chr

Image Tim Hill - Base of vertical chalk cliff showing green cover of Chrysophyceae. Image width ca XX cm.
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Distribution map

LR.FLR.CvOv.ChrHap recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)

  • EC_Habitats
  • OSPAR

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

Chemical Factors

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

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 Not relevant Not relevant Not relevant Not relevant Not relevant
Extraction of other species Not relevant Not relevant Not relevant Not relevant Not relevant

This review can be cited as follows:

Tyler-Walters, H. 2001. Chrysophyceae on vertical upper littoral fringe soft 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=121&code=2004>