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Biodiversity & Conservation
| Basic Information | Biotope classification | Ecology | Habitat preferences and distribution | Species composition | Sensitivity | Importance |
Ascophyllum nodosum with epiphytic sponges and ascidians on variable salinity infralittoral rock
IR.SIR.Lag.AscSAs
Image Sue Scott - Ascophyllum nodosum with epiphytes (SIR.AscSAs). Image width ca 30 cm.
Image copyright information
IR.SIR.Lag.AscSAs 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 | Low | High | Major decline | High |
| Smothering | Low | Very high | Very low | No change | Low |
| Increase in suspended sediment | Low | Very high | Very low | No change | Moderate |
| Decrease in suspended sediment | Low | Very high | Very low | No change | Moderate |
| Desiccation | Low | High | Low | Minor decline | Moderate |
| Increase in emergence regime | Low | High | Low | Minor decline | Low |
| Decrease in emergence regime | Not relevant | Not relevant | Not relevant | No change | Moderate |
| Increase in water flow rate | Low | Very high | Very low | Rise | Moderate |
| Decrease in water flow rate | Not relevant | Not relevant | Not relevant | Not relevant | Not relevant |
| Increase in temperature | Low | High | Low | Minor decline | Low |
| Decrease in temperature | Low | High | Low | Minor decline | Low |
| Increase in turbidity | Low | Very high | Very low | No change | Moderate |
| Decrease in turbidity | Tolerant* | Very high | Not sensitive* | No change | Moderate |
| Increase in wave exposure | High | Low | High | Decline | Moderate |
| Decrease in wave exposure | Not relevant | Not relevant | Not relevant | No change | High |
| Noise | Tolerant | Not relevant | Not sensitive | No change | High |
| Visual Presence | Tolerant | Not relevant | Not sensitive | No change | High |
| Abrasion & physical disturbance | Intermediate | Low | High | Decline | Moderate |
| Displacement | High | Low | High | Major decline | High |
Chemical Factors
| Click factor name to view rationale | Intolerance | Recoverability | Sensitivity | Species Richness | Evidence / Confidence |
|---|---|---|---|---|---|
| Synthetic compound contamination | High | Low | High | Decline | Moderate |
| Heavy metal contamination | Low | High | Low | Minor decline | High |
| Hydrocarbon contamination | Low | High | Low | Decline | Moderate |
| Radionuclide contamination | Insufficient information | Insufficient information | Insufficient information | Insufficient Information | Not relevant |
| Changes in nutrient levels | Intermediate | High | Low | Minor decline | Low |
| Increase in salinity | Low | High | Low | No change | Low |
| Decrease in salinity | Low | High | Low | No change | Low |
| Changes in oxygenation | Low | Very high | Very low | Minor decline | Low |
Biological Factors
| Click factor name to view rationale | Intolerance | Recoverability | Sensitivity | Species Richness | Evidence / Confidence |
|---|---|---|---|---|---|
| Introduction of microbial pathogens/parasites | Low | High | Low | Low | |
| Introduction of non-native species | Tolerant | Not relevant | Not sensitive | No change | Low |
| Extraction of this species | Intermediate | High | Low | No change | Moderate |
| Extraction of other species | Low | High | Low | Decline | Moderate |
Species used to indicate biotope intolerance
Physical factors
| Ascophyllum nodosum Key structural | Ciona intestinalis Important characterizing | Fucus serratus Important structural | |
| Substratum Loss | High | High | High |
| Smothering | High | Intermediate | High |
| Increase in suspended sediment | Low | Low | Low |
| Decrease in suspended sediment | |||
| Desiccation | Intermediate | Intermediate | Intermediate |
| Increase in emergence regime | High | High | Intermediate |
| Decrease in emergence regime | |||
| Increase in water flow rate | Intermediate | Low | Intermediate |
| Decrease in water flow rate | |||
| Increase in temperature | Low | Intermediate | Tolerant |
| Decrease in temperature | |||
| Increase in turbidity | Low | Tolerant | Low |
| Decrease in turbidity | |||
| Increase in wave exposure | High | Intermediate | High |
| Decrease in wave exposure | |||
| Noise | Tolerant | Tolerant | Tolerant |
| Visual Presence | Tolerant | Tolerant | Tolerant |
| Abrasion & physical disturbance | High | High | Intermediate |
| Displacement | High | High | High |
Chemical factors
| Ascophyllum nodosum Key structural | Ciona intestinalis Important characterizing | Fucus serratus Important structural |
|
| Synthetic compound contamination | Intermediate | Insufficient information | High |
| Heavy metal contamination | Low | Insufficient information | Low |
| Hydrocarbon contamination | Low | Insufficient information | Intermediate |
| Radionuclide contamination | Insufficient information | Insufficient information | Insufficient information |
| Changes in nutrient levels | Intermediate | Tolerant* | Intermediate |
| Increase in salinity | Low | Low | Low |
| Decrease in salinity | |||
| Changes in oxygenation | Insufficient information | Low | Low |
Biological factors
| Ascophyllum nodosum Key structural | Ciona intestinalis Important characterizing | Fucus serratus Important structural |
|
| Introduction of microbial pathogens/parasites | Insufficient information | Insufficient information | Insufficient information |
| Introduction of non-native species | Insufficient information | Intermediate | Insufficient information |
| Extraction of this species | Intermediate | Not relevant | Intermediate |
| Extraction of other species | Tolerant | Tolerant | Tolerant |
Species used to indicate biotope recoverability
Physical factors
| Ascophyllum nodosum Key structural | Ciona intestinalis Important characterizing | Fucus serratus Important structural | |
| Substratum Loss | Low | High | High |
| Smothering | Low | Very high | High |
| Increase in suspended sediment | Immediate | Immediate | Very high |
| Decrease in suspended sediment | |||
| Desiccation | Moderate | Very high | High |
| Increase in emergence regime | Low | High | High |
| Decrease in emergence regime | |||
| Increase in water flow rate | Low | Immediate | High |
| Decrease in water flow rate | |||
| Increase in temperature | Moderate | Very high | Not relevant |
| Decrease in temperature | |||
| Increase in turbidity | Immediate | Not relevant | Very high |
| Decrease in turbidity | |||
| Increase in wave exposure | Low | Very high | High |
| Decrease in wave exposure | |||
| Noise | Not relevant | Not relevant | Not relevant |
| Visual Presence | Not relevant | Not relevant | Not relevant |
| Abrasion & physical disturbance | Low | High | High |
| Displacement | Low | High | High |
Chemical factors
| Ascophyllum nodosum Key structural | Ciona intestinalis Important characterizing | Fucus serratus Important structural |
|
| Synthetic compound contamination | Low | Insufficient information | High |
| Heavy metal contamination | High | Insufficient information | High |
| Hydrocarbon contamination | Moderate | Insufficient information | High |
| Radionuclide contamination | Insufficient information | Insufficient information | Insufficient information |
| Changes in nutrient levels | High | Not relevant | High |
| Increase in salinity | High | Immediate | Very high |
| Decrease in salinity | |||
| Changes in oxygenation | Insufficient information | Immediate | Very high |
Biological factors
| Ascophyllum nodosum Key structural | Ciona intestinalis Important characterizing | Fucus serratus Important structural |
|
| Introduction of microbial pathogens/parasites | Not relevant | Insufficient information | Insufficient information |
| Introduction of non-native species | Not relevant | Very high | Insufficient information |
| Extraction of this species | Low | Not relevant | High |
| Extraction of other species | Not relevant | Not relevant | Not relevant |
This review can be cited as follows:
Hill, J.M. 2001. Ascophyllum nodosum with epiphytic sponges and ascidians on variable salinity infralittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 23/05/2013]. Available from: <http://www.marlin.ac.uk/habitatsensitivity.php?habitatid=328&code=1997>
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