The following is a short summary of the habitat type and how to create/enhance it to a "good" condition. For an informed position, please refer to official up-to-date Government guidance or the UK Government's Condition Assessment Sheet.
This aligns with the description provided by EUNIS ART_A1_IGGI
Where natural materials (most commonly naturally occurring rock) are used to create man-made structures for a range of functions (for example coastal defences, aquaculture). The structures’ designs must maximise likeness to the naturally occurring hard habitats from that area in terms of material (for example geological origin), position (tidal level, exposure, aspect), topographic complexity (surface roughness, availability of microhabitat like rock pools or crevices, slope), to support their colonisation with species naturally occurring in the area and to maximise benefits for biodiversity and ecosystem function. Examples: breakwaters or seawalls built with materials local to the region, and with depressions (rock pools) added during the design process or retrospectively
How to Create / Enhance to a "Good" condition
⚠️ Important Note
The design and management of coastal habitats will have specific competency requirements which should be demonstrated where these habitats are targeted in the SSM.
There are a set of criteria that are used to judge the condition of this habitat. These are listed below.
| Indicator | Good (3 points) | Moderate (2 points) | Poor (1 point) |
A | Coastal processes | Coastal processes are functioning naturally. No evidence of human physical modifications which are clearly impacting the habitat. | Artificial structures present, for example groynes that are impeding the natural movement of sediments or water, affecting up to 25% of the habitat. | Artificial structures present, for example groynes that are impeding the natural movement of sediments or water, affecting more than 25% of the habitat. |
B | Presence and abundance of invasive non-native species | Not more than one invasive non-native species is ‘Occasional’ on the SACFOR scale or is occupying more than 1% of the habitat. No high-risk species indicative of suboptimal condition present, see Footnote 1 for details. | No invasive non-native species are present above ‘Frequent’ on the SACFOR scale or they occupy between 1-10% of the habitat. No high-risk species indicative of suboptimal condition present, see Footnote 1 for details. | One or more invasive non-native species present at an ‘Abundant’ level on the SACFOR scale; they occupy more than 10% of the habitat; or a high-risk species indicative of suboptimal condition is present – GB Non-native Species Secretariat should be notified, see Footnote 1 for details. |
C | Water Quality | No visual evidence of pollution. There are no nuisance algal growths that are likely to be attributable to nutrient enrichment. Consider seasonality of survey timing2. | Visual evidence of low to moderate levels of pollution. Elevated algal growth with increases in cover that may indicate nutrient enrichment. Consider seasonality of survey timing2. | Visual evidence of high algal growth that is indicative of nutrient enrichment. Signs of eutrophication that would impede bird feeding. Consider seasonality of survey timing2. |
D | Litter (when examining a beach strandline, mean high water line or intertidal rocky shore) | Following the Marine Conservation Society (MCS) beach litter survey method, the number of items of litter does not exceed 0.0036 m−1 min−1 person−1, equivalent to up to 20 items per person per 100 m per hour. See Footnote 3 for details. | Following the MCS beach litter survey method, the number of items of litter does not exceed 0.0078 m−1 min−1 person−1, equivalent to between 21 and 47 items of litter per person per 100 m per hour. See Footnote 3 for details. | Following the MCS beach litter survey method, the number of items of litter exceeds 0.0078 m−1 min−1 person−1, equivalent to more than 47 items of litter per person per 100 m per hour. See Footnote 3 for details. |
E | Amount of colonisation | More than three different communities of flora or fauna present. | Two or three different communities of flora or fauna present. | One or no communities of flora or fauna present. |
Condition Assessment Result |
TOTAL SCORE 12-15 (75-100%) = GOOD CONDITION |
TOTAL SCORE 8-11 (50-75%) = MODERATE CONDITION |
TOTAL SCORE 5-7 (0-50%) = POOR CONDITION |
Footnotes |
Footnote 1 - Abundances estimated using SACFOR scales details available here: JNCC (No date) SACFOR abundance scale used for both littoral and sublittoral taxa from 1990 onwards [online]. Available from: Use the non-native species list available here: DEFRA (2022) UK Marine Non-Indigenous Species Priority List (updated 2020) [online]. Available on:
High-risk species indicative of suboptimal condition at time of publication include:
Footnote 2 - Peak bloom time is July – September
The indicator thresholds for litter are based on the methods in Van Loon et al (2020), which is guidance developed within the Common Implementation Strategy for the Marine Strategy Framework Directive (MSFD) by the MSFD Technical Group on Marine Litter.
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