Planning Scotland's Seas: 2013 - The Scottish Marine Protected Area Project – Developing the Evidence Base for Impact Assessments and the Sustainability Appraisal Final Report - Appendix E - Marine Site Reports
This is Appendix E for the pMPA Impact and Sustainability Report containing the detailed site by site reports. Published separately due to size.
South-west Sula Sgeir & Hebridean Slope ( SSH)
Site Area (km 2): 2,093
Site Summary
Table 1. Summary of Proposed Protected Features, Data Confidence and Conservation Objectives | [ SSH] | ||||
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Proposed protected features | |||||
Biodiversity Features Burrowed mud, offshore subtidal sands and gravels, offshore deep sea muds, continental slope. Geodiversity Features Quaternary of Scotland - iceberg ploughmark fields, prograding wedges; Submarine Mass Movement - slide deposits. Site Description The SSH MPA proposal is an offshore area located to the north west of the Outer Hebrides. The proposal extends from the continental shelf, down the Hebridean slope and into the Rockall Trough. Potential Alternative Designations The MPA proposal is considered to offer an equivalent contribution to the MPA network as the Geikie Slide and Hebridean Slope possible MPA. Only one of these two designations would therefore be required to be designated. |
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Summary of confidence in presence, extent and condition of proposed protected features and conservation objectives | |||||
Proposed Protected Feature | Estimated Area of Feature (by scenario) (km 2) | Confidence in Feature Presence |
Confidence in Feature Extent |
Confidence in Feature Condition |
Conservation Objective and Risk |
Biodiversity Features | |||||
Burrowed mud | Lower: 1563.68 Intermediate: 1563.68 Upper: 1723 |
Yes (Marine Scotland Science survey data, 2000 - 2009; SAMS analysis of SEA7, 1988 - 1998) | Partial | Low | Conserve (uncertain) |
Offshore subtidal sands and gravels | Lower: 271.61 Intermediate: 271.61 Upper: 373.77 |
Yes ( UK SeaMap, 2010; SAMS analysis of SEA7, 1988 - 1998; BGS PSA data, provided 2012) | Partial | Low | Conserve (uncertain) |
Offshore deep sea muds | All scenarios: 22.04 | Yes ( UK SeaMap, 2010; SAMS analysis of SEA7, 1988 - 1998) | Partial | Low | Conserve (uncertain) |
Continental slope | Yes ( UK SeaMap, 2010) | Partial | Low | Conserve (uncertain) | |
Geodiversity Features | |||||
Quaternary of Scotland - iceberg ploughmark fields | 4435.65 | Yes | Yes | Low | Conserve (uncertain) |
As above - prograding wedges | 514.70 | Yes | Yes | Low | Conserve (uncertain) |
Submarine Mass Movement - slide deposits | 1046.25 | Yes | Yes | Low | Conserve (uncertain) |
Key: * Estimated area based on best available data References: Area of Features: GeMS Confidence in biodiversity feature presence and extent: JNCC (2012k) Confidence in biodiversity feature condition: JNCC (2013) pers. comm. Confidence in geodiversity feature presence and extent: Brooks et al. (2012) Confidence in geodiversity feature condition: Brooks et al. (2012) |
Summary of Costs and Benefits
Table 2a. Site-Specific Economic Costs on Human Activities arising from the Designation and Management of the Site as an MPA (present value of total costs over 2014 to 2033 inclusive) | [ SSH] | ||
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Human Activity | Cost Impact on Activity | ||
Lower Estimate (£Million) | Intermediate Estimate (£Million) | Upper Estimate (£Million) | |
Quantified Economic Costs (Discounted) | |||
Commercial Fisheries* | 0.000 | 5.282 | 6.495 |
Total Quantified Economic Costs | 0.000 | 5.282 | 6.495 |
Non-Quantified Economic Costs | |||
Commercial Fisheries |
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Note: For detailed information on economic cost impacts on activities, see Table 4. * These estimates (present value of total change in GVA) assume zero displacement of fishing activity and hence are likely to overestimate the costs. |
Table 2b. Site-Specific Public Sector Costs arising from the Designation and Management of the Site as an MPA (over 2014 to 2033 inclusive) | [ SSH] | ||
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Description | Public Sector Costs | ||
Lower Estimate (£Million) | Intermediate Estimate (£Million) | Upper Estimate (£Million) | |
Quantified Public Sector Costs (Discounted) | |||
Preparation of Marine Management Schemes | None | None | None |
Preparation of Statutory Instruments | None | 0.005 | 0.005 |
Development of voluntary measures | National assessment | National assessment | National assessment |
Site monitoring | National assessment | National assessment | National assessment |
Compliance and enforcement | National assessment | National assessment | National assessment |
Promotion of public understanding | National assessment | National assessment | National assessment |
Regulatory and advisory costs associated with licensing decisions | None | None | None |
Total Quantified Public Sector Costs | 0.000 | 0.005 | 0.005 |
Non-Quantified Public Sector Costs | |||
None identified. |
Table 2c. Summary of Social Impacts and Distribution of Quantified Impacts arising from the Designation and Management of the Site as an MPA (over 2014 to 2033 inclusive) | [ SSH] | |||||||||
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Key Areas of Social Impact | Description | Scale of Expected Impact across Scenarios, Average (mean no. of jobs affected) | Distributional Analysis | |||||||
Location | Fishing Groups Predominantly Affected | Social Groups Affected | ||||||||
Region | Port | Rural/ Urban/ Island | Gear Types Most Affected | Vessels most affected | Crofters | Ethnic minorities | With disability or long term sick | |||
Employment with consequent impacts on: Health, Crime, Environment, and Culture and Heritage | Commercial fisheries - Loss of jobs (direct and indirect) | Lower: 0 jobs Intermediate: 9 jobs Upper: 11 jobs |
North-East North North-West |
Fraserburgh Kirkwall Lochinver |
Impacts concentrated in island, rural and urban coastal areas | Whitefish trawls | Lower: N/A Upper: <15m (may be over-estimate) | No Impact. | No breakdown of fisherman employment by ethnic origin. | Unlikely to be employed in fisheries. |
Note: For detailed information on socio-economic impacts by sector, see Table 7a. For more detailed information on distributional impacts of quantified costs by sector see Tables 7b and 7c. |
Table 2d. Site-Specific Benefits arising from the Designation and Management of the Site as an MPA (over 2014 to 2033 inclusive) | [ SSH] | |
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Benefit | Description | |
Ecosystem Services Benefits (Moderate and High Benefits) | Relevance | Scale of Benefits |
Non-use value of natural environment | Nil - Low | Nil - Moderate |
Other Benefits | ||
None identified. | ||
Note: For detailed information on ecosystem services benefits, see Tables 9 and 10. For detailed information on other benefits, see Table 5 (activities that would benefit) and Table 8 (contribution to ecologically-coherent network). |
Summary of Overlaps and Interactions between Proposed Designated Features and Human Activities
Table 3. Overlaps and Potential Interactions between Features and Activities under different Scenarios, indicating need for Assessment of Cost Impacts on Human Activities from Designation of the Site as an MPA | [ SSH] | ||||||||||||||||
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Aggregates | Aquaculture (Finfish) | Aquaculture (Shellfish) | Aviation | Carbon Capture & Storage | Coastal Protection | Commercial Fisheries | Energy Generation | Military Activities | Oil & Gas | Ports & Harbours | Power Interconnectors | Recreational Boating | Shipping | Telecom Cables | Tourism | Water Sports | |
Biodiversity Features | |||||||||||||||||
Burrowed mud | - | - | - | - | - | - | L/ I/U | - | - | L/I/U | - | - | - | - | - | - | - |
Offshore subtidal sands and gravels | - | - | - | - | - | - | L/ I/U | - | - | - | - | - | - | - | - | - | - |
Offshore deep sea muds | - | - | - | - | - | - | L/ I/U | - | - | L/I/U | - | - | - | - | - | - | - |
Continental slope | Not considered as not thought to be sensitive to pressures associated with human activity. | ||||||||||||||||
Geodiversity Features | |||||||||||||||||
Quaternary of Scotland - iceberg ploughmark fields, prograding wedges | Considered to have a low sensitivity to the pressures associated with activities they are currently exposed and likely to be exposed to in the future; thus not considered in the context of management. | ||||||||||||||||
Submarine Mass Movement - slide deposits | |||||||||||||||||
Note: L = Lower Scenario; I = Intermediate Scenario; U = Upper Scenario. Normal font indicates that there is an overlap between the activity and proposed protected feature under that scenario, bold indicates that the overlap results in a potential interaction between the activity and proposed protected feature that has resulted in cost impacts under that scenario. For detail of management measures assessed under each scenario for each activity, and results of the cost estimates, see Table 4. |
Human Activity Summaries
Human activities that would be impacted by designation of the site as an MPA
Table 4a. Commercial Fisheries (assuming zero displacement of fishing activity) | [ SSH] | ||
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According to VMS-based estimates and ICES rectangle landings statistics, pelagic trawls, whitefish trawls and lines (over-15m) and whitefish trawls, lines, pelagic trawls, and other gear (under-15m vessels) operate within the SSH proposed MPA. The value of catches from the SSH area was £1.68 million (over-15m vessels) and £1.01 million (under-15m vessels, indicated from ICES rectangle landings data) (annual average for 2007-2011, 2012 prices). Landings from the over-15m vessels are predominantly into Peterhead (28% by value), Lerwick (15%), Fraserburgh (12%), Ijmuiden, The Netherlands (11%) and Ellingsoy, Norway (9%). For the over-15m fleet, whitefish trawlers operate in particular in the east part of the proposed MPA in the area of subtidal sands and gravels. Combined, burrowed mud, offshore deep-sea muds and offshore subtidal sands and gravels cover the whole proposed MPA. Management measures for the scenarios have been developed based on the sensitivity and vulnerability of the features to the pressures caused by different gear types and based on JNCC recommendations. VMS ping data indicate that 33 non- UK vessels were active in the SSH area in 2012: 13 from France; 9 from Spain; 7 from Norway; 3 from the Netherlands and 1 from Germany. The Dutch and German vessels fish with pelagic gear (pelagic trawls) and therefore are unlikely to be affected by the proposed management scenarios. Five French vessels and 4 Spanish vessels fish with bottom trawl and therefore would be impacted by the management measures assessed under the intermediate and upper scenarios. No information on gear types used by the Norwegian vessels was available. Information submitted by the French ministry indicated that 7 vessels in 2008, and 5 vessels in 2011, fished in the proposed MPA area. These were predominantly demersal trawlers and predominantly >40m vessels. Target species were black scabbardfish, hake, grenadiers, blue ling, anglerfish and saithe, with catches worth €0.829 million in 2008 and €0.467 million in 2011. The vessels originated from Lorient, Fécamp and Saint Malo ports, but had their home ports at Lochinver, Lorient and Ijmuiden (in 2011). 2% of their turnover was dependent on fishing in the proposed MPA area, and they accounted for 93 FTE jobs on board in 2011. Provisional ScotMap data do not indicate any under-15m vessel activity in the SSH proposed MPA. The cost estimates for the under-15m sector may be overestimates, as the 'under-15m' length group in the ICES rectangle landings data may include cases where information on vessel length and/or administrative port is missing from landings returns. Unlike most other sectors, the potential cost of designation on commercial fisheries is a loss or displacement of current (and future) output, caused by restrictions on fishing activities. Any decrease in output will, all else being equal, reduce the Gross Value Added ( GVA) generated by the sector and have knock-on effects on the GVA generated by those industries that supply commercial fishing vessels. The costs estimates for this sector have therefore been estimated in terms of GVA. GVA estimates have been generated by applying fleet segment-specific 'GVA/total income' ratios to the value of landings affected. The GVA ratios have been calculated using data on total income and GVA from the Sea Fish Industry Authority Multi-year Fleet Economic Performance Dataset (published March 2013). Further details on the GVA ratios and the methodology for estimating GVA and employment impacts applied are presented in Appendix C7. It is important to note that all costs presented below assume that all affected landings are lost, that is, there is no displacement of fishing activity to alternative fishing grounds. In reality, some displacement is likely to occur and hence the cost, GVA and employment impacts presented in this table are likely to overestimate the costs. |
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Economic Costs on the Activity of Designation of the Site as an MPA | |||
Lower Estimate | Intermediate Estimate | Upper Estimate | |
Assumptions for cost impacts |
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Description of one-off costs |
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Description of recurring costs |
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Description of non-quantified costs |
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Quantified Costs on the Activity of Designation of the Site as an MPA (£Million) | |||
Total costs (2014-2033) | 0.000 | 15.941 | 20.060 |
Average annual costs | 0.000 | 0.797 | 1.003 |
Present value of total costs (2014-2033) | 0.000 | 11.724 | 14.754 |
Economic Impacts (£Million) | |||
Total change in GVA (2014-2033) | 0.000 | 7.181 | 8.830 |
Average annual change to GVA | 0.000 | 0.359 | 0.442 |
Present value of total change in GVA (2014-2033) | 0.000 | 5.282 | 6.495 |
Direct and Indirect reduction in Employment | 0.0 jobs | 9.1 jobs | 11.4 jobs |
Total costs = Sum of one-off costs and recurring costs for the site summed over the 20 year period. Average annual costs = Total costs divided by the total number of years under analysis ( i.e. 20). Present value of total costs = Total costs discounted to their current value, using a discount rate of 3.5%. Total change in GVA (2014-2033) = The change in direct GVA in the sector for the site summed over the 20 year period. Average annual change to GVA = Total change in direct GVA in the sector for the site divided by the total number of years under analysis ( i.e. 20). Present value of total change in GVA (2014-2033) = Total change in direct GVA in the sector for the site discounted to current value, using a discount rate of 3.5%. Direct and Indirect reduction in Employment = The average (mean) reduction in direct employment in the sector plus the indirect reduction in employment on the sector's suppliers. |
Human activities that would benefit from designation of the site as an MPA
Table 5. Human Activities that would Benefit from Designation of the Site as an MPA | [ SSH] | ||
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Activity | Lower Estimate | Intermediate Estimate | Upper Estimate |
None identified. |
Human activities that are present but which would be unaffected by designation of the site as an MPA
Table 6. Human Activities that are Present but which would be Unaffected by Designation of the Site as an MPA [ SSH] | |
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Activity | Description |
Oil and Gas | There are two wells within the SSH proposed MPA boundary and in one a significant gas discovery has been made, although the discovery was made in 2000 and both wells now have an abandoned status. Although both wells overlap with proposed protected features, no licence blocks have been awarded within the SSH proposed MPA boundary and no future activity is expected. |
Social and Distributional Analysis of Impacts from Designation of the Site as an MPA
Potential Contribution of the Site to an Ecologically-Coherent Network
Table 8. Overview of Features Proposed for Designation and how these contribute to an Ecologically Coherent Network of MPAs | [ SSH] | ||||
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Feature Name | Representation | Replication | Linkages | Geographic Range and Variation |
Resilience |
Burrowed mud | Provides representation for the seapens and burrowing megafauna type of burrowed mud in OSPAR Region V at the northern extent of its geographical range on the Hebridean slope. | Makes a contribution to one of at least two recommended areas of this type of burrowed mud in OSPAR Region V in Scotland's seas. | Not currently understood for burrowed mud. | Provides representation at the northern extent of its range on the continental slope and off the shelf in OSPAR Region V in Scotland's seas. | Burrowed mud is considered to be Threatened and/or Declining by the OSPAR Commission in OSPAR Region V so the MPA is expected to help increase resilience for the feature. |
Offshore deep sea muds | Provides representation for Atlantic-influenced offshore deep sea mud habitats on the slope in OSPAR Region V. | Represents one of at least two examples of slope Atlantic-influenced offshore deep sea mud habitats recommended for protection in OSPAR Region V. | Not currently understood for offshore deep sea muds. | Provides representation of Atlantic influenced offshore deep sea muds at the northern extent of their range in OSPAR Region V. | Offshore deep sea muds are fairly widely recorded across offshore waters in Scotland's seas. |
Offshore subtidal sands and gravels | Provides representation for Atlantic-influenced offshore subtidal sand and gravel habitats predominantly on the slope in OSPAR Region V, but also to a small extent on the shelf in OSPAR Region III. | It represents one of at least two recommended examples of Atlantic influenced slope and shelf offshore, subtidal sand and gravel habitats to be protected in OSPAR Regions V and III respectively. | Not currently understood for offshore subtidal sands and gravels. | Provides representation at the northern extent of its range on the continental slope and on the shelf in OSPAR Regions V and III respectively in Scotland's seas. | Offshore subtidal sands and gravels are fairly widely recorded across offshore waters in Scotland's seas. |
Continental slope | The possible MPA provides representation for one of two recommended areas of the Scottish continental slope to be included within the MPA network. | The Hebridean slope is considered ecologically and hydrographically distinct to the Faroe-Shetland Channel slope and so the recommendation is for at least one example of each area of the slope to be included. | Not currently understood for the continental slope. | The Hebridean slope is considered ecologically and hydrographically distinct to the Faroe-Shetland Channel slope. This possible MPA represents one example of the Hebridean slope. | The continental slope occurs between Scotland's shelf and off-shelf environment. |
JNCC (pers. comm.); SNH and JNCC. (2012). Assessment of the potential adequacy of the Scottish MPA network for MPA search features: summary of the application of the stage 5 selection guidelines. Available online from: http://www.scotland.gov.uk/Topics/marine/marine-environment/mpanetwork/engagement/270612. |
Anticipated Benefits to Ecosystem Services
Table 9. Summary of Ecosystem Services Benefits arising from Designation of the Site as an MPA [31] | [ SSH] | |||||||
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Services | Relevance to Site |
Baseline Level | Estimated Impacts of Designation | Value Weighting | Scale of Benefits | Confidence | ||
Lower | Intermediate | Upper | ||||||
Fish for human consumption | Moderate. Habitats make contribution to food webs. | Stocks not at MSY | Nil | Low - Moderate, promotes stocks in medium /long term. Features provide moderate level of supporting services to support recovery | High - fishing grounds are of high value | Nil - Moderate | Moderate | |
Fish for non-human consumption | Stocks reduced from potential maximum | |||||||
Gas and climate regulation | Nil - Low | Nil - Low | Nil, or at best a very low level of protection of parts of ecosystem providing these services | Low | Nil - Low | High | ||
Natural hazard protection | Nil - Low | Nil - Low | Low | Nil - Low | High | |||
Regulation of pollution | Nil - Low | Nil - Low | Low | Nil - Low | High | |||
Non-use value of natural environment | Low - Moderate | Low - Moderate | Nil | Low | Low - Moderate | Low - Moderate | Nil - Moderate | Low |
Recreation | Minimal | Minimal | Nil | Nil | Nil | Minimal | Minimal | Moderate |
Research and Education | Minimal - Low | Minimal | Nil | Low | Low | Low | Low | Low |
Total value of changes in ecosystem services | Fisheries likely to drive benefits from scenarios ranging from low to moderate benefits. | Low - Moderate | Low |
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