Blue Carbon

Author: Roxana T. Shafiee

PDF Published: Tuesday 23 Mar 2021 (SB 21-19)

Compiled photographic images of coastal blue carbon habitats (including saltmarshes, sand dunes and machair) and biological blue carbon habitats (kelp beds, a phytoplankton bloom, seagrass beds, a cold-water coral reef and maerl beds).

Image: Figure 1. Coastal and living, biological blue carbon habitats found in Scotland

Photographic images of a Scottish Sea Loch and a sea bed

Image: Figure 2. Geological blue carbon stores found in Scotland

Plots showing carbon stores (as megatonnes carbon dioxide equivalent) in different biological blue carbon habitats and geological carbon stores, and rates of carbon sequestration by the different stores/habitats.

Image: Figure 3. Total carbon stored and sequestered annually by Scotland's biological and geological blue carbon habitats and stores

Bar charts showing the proportion of Scotland's blue carbon which is in geological stores (99.84%) versus carbon in biological habitats and species (0.16%). Inset bar chart shows the proportion of carbon in biological habitats which is biogenic reef carbon storage (0.5 megatonnes of carbon dioxide equivalent).

Image: Figure 13. Biogenic reefs carbon storage and sequestration at a glance

Compiled photographic images of biogenic reef forming habitats in Scotland including, flame shell beds, cold-water corals, horse mussel beds, blue mussel beds, tubeworm/serpulid reefs, brittlestar beds.

Image: Figure 14. Biogenic reef-forming habitats found in Scotland's seas

Map of Scotland and Scotland's seas showing points where records of biogenic reefs (cold-water corals, blue mussel beds, horse mussel beds, flame shell beds, serpulid reefs) have been observed in the Geodatabase of Marine features adjacent to Scotland (GeMS) (V9i25).

Image: Figure 15. Records of biogenic reef-forming habitats in Scotland's seas (excluding Maerl beds)

Image: Figure 24. Seafloor carbon storage and sequestration at a glance

Image: Figure 4. Saltmarsh carbon storage and sequestration at a glance

Photographic image of saltmarsh flats at the end of Upper Loch Torridon, observed from the National Trust for Scotland wildlife hide

Image: Figure 5. Saltmarsh flats at the end of Upper Loch Torridon, observed from the National Trust for Scotland wildlife hide

Image: Figure 6. Sand dune carbon storage and sequestration at a glance

Photographic image of mobile sand dune in Forvie Nature Reserve

Image: Figure 7. Forvie National Nature Reserve Mobile Sand Dunes

Image: Figure 8. Machair carbon storage and sequestration at a glance

Photographic image of wildflowers on a machair on Berneray, Outer Hebrides

Image: Figure 9. Wildflowers on a machair on Berneray, Outer Hebrides

Image: Figure 10. Seagrass carbon storage and sequestration at a glance

Map of Scotland showing points where records of seagrass beds have been observed in the Geodatabase of Marine features adjacent to Scotland (GeMS) (V9i25).

Image: Figure 11. Records of Seagrass in Scotland's seas

Photographic image of pipefish in seagrass reeds

Image: Figure 12. Pipefish in seagrass bed

Image: Figure 16. Maerl beds carbon storage and sequestration at a glance

Map of Scotland showing points where records of maerl and maerl beds have been observed in the Geodatabase of Marine features adjacent to Scotland (GeMS) (V9i25).

Image: Figure 17. Records of maerl and maerl beds found in Scotland's seas

Photographic image of pink-purple maerl bed on coarse gravel

Image: Figure 18. Maerl bed of the species Phymatolithon calcareum on gravel

Pie chart showing, out of all biological habitats, the proportion which is sequestered annually by phytoplankton. This is alongside statement which reads 'rapid turnover of phytoplankton biomass precludes accurate assessment [of carbon storage]'.

Image: Figure 19. Phytoplankton carbon storage and sequestration at a glance

Photographic image of green phytoplankton cells under high magnification and a satellite image of a phytoplankton bloom off the east coast of Scotland.

Image: Figure 20. Phytoplankton under the microscope (left) and a phytoplankton bloom off the east coast of Scotland (right)

Image: Figure 21. Kelp carbon storage and sequestration at a glance

Map of Scotland showing points where records of kelp beds and kelp and seaweeds on sublittoral sediment have been observed in the Geodatabase of Marine features adjacent to Scotland (GeMS) (V9i25).

Image: Figure 22. Records of kelp and seaweed communities on sublittoral sediment and kelp beds in Scotland's seas

Photographic image of seal nestled within a kelp bed

Image: Figure 23. Seal nestled in a kelp forest

Map of Scotland and Scotland's seas showing the density distribution of inorganic carbon, with greatest densities (greater than 6 kg per cubic metre inorganic carbon) shown to the north east of Scotland, to the west of the Hebrides and on the western edge of Scotland's Adjacent Waters.

Image: Figure 25. Distribution of inorganic carbon (shown by density, in kg/m3) in seafloor sediments in Scotland's Seas

Map of Scotland and Scotland's seas showing the density distribution of organic carbon, with greatest densities (greater than 0.9 kg per cubic metre organic carbon) shown in the inshore regions of the western coast.

Image: Figure 26. Distribution of organic Carbon (shown by density, in kg/m3) in seafloor sediments in Scotland's Seas

Bar graphs showing the contribution of inorganic carbon and organic carbon to seafloor sediment carbon storage and carbon sequestration. Pie chart of the proportion of organic carbon sequestration that is kelp derived (31.6%) and phytoplankton derived (68.4%).

Image: Figure 27. Organic and inorganic carbon storage and sequestration in Scotland's seafloor sediments, and the contribution of phytoplankton and kelp to seafloor sediment organic carbon sequestration

Image: Figure 28. Sea loch sediments carbon storage and sequestration at a glance

Figure showing the contribution of seafloor sediments (99.7%) and sea loch sediments (0.3%) to Scotland's total blue carbon storage. Bar plots showing that compositional makeup of the carbon in these stores, showing that sealoch sediments have a greater proportion of organic carbon (42%) compared with seafloor sediments (14%).

Image: Figure 29. Contribution of seafloor sediments and sea loch sediments to the total carbon storage in Scotland's seas.

Infographic showing the carbon stored and annually sequestered (in megatonnes of carbon dioxide equivalent per year) in Scotland's blue carbon, split into biological habitats and marine sediments, and Scotland's terrestrial carbon, split into forestry, peatland and non-peatland soils. This is shown alongside Scotland's annual greenhouse gas emissions.

Image: Figure 30. Comparison of blue carbon storage and sequestration with terrestrial carbon, and Scotland's greenhouse gas emissions.

Bar graph showing the range of carbon sequestration rates (on a per unit basis, measured in grams of carbon dioxide equivalent per meter square per year) in blue carbon biological habitats, sea loch sediments, seafloor sediments (inshore and offshore), forestry and restored peatland.

Image: Figure 31. Range of carbon sequestration rates per unit area, of blue carbon and terrestrial carbon stores and habitats

Infographic depicting the key threats to Scotland's blue carbon habitats and stores, categorised into: physical disturbances to habitats, climate change and changes in land management and land use change.

Image: Figure 32. Key threats to Scotland's blue carbon habitats and stores

Photographic image of mechanical kelp harvesting machinery

Image: Figure 33. Mechanical kelp harvesting

Schematic images of types of two types of mobile-fishing equipment - demersal trawl and scallop dredge

Image: Figure 34. Types of mobile-fishing equipment - demersal trawl (left) and scallop dredge (right)

Figure showing disturbance to Scotland's seafloor within Scotland's Extended Economic Zone, assessed through a disturbance scores 0 (no sensitivity data, shown in grey) - 9 (maximum disturbance, shown in navy).Figure shows greatest disturbance scores of 9 in Offshore regions of Fladen and Moray Firth. No data shown for Hatton region.

Image: Figure 35. Disturbance to Scotland's seafloor, assessed through a disturbance scores 0 (no sensitivity data, shown in grey) - 9 (maximum disturbance, shown in navy).

Map of Scotland showing inshore regions with restrictions or bans to trawling and/or dredging

Image: Figure 36. Regions in Scotland's seas with restrictions (line filled) or bans (solid fill) to trawling and/or dredging

Two maps of Scotland showing organic carbon densities (measured in kg per cubic metre) in and not in areas with banned or restricted bottom-towed fishing.

Image: Figure 37. Organic carbon density (kg/m3) in regions with restrictions or bans on bottom-towed fishing (left) and in regions without restrictions on bottom-towed fishing (right).

Map of Scotland's seas showing Priority Marine Features (PMFs) in areas where bottom-towed fishing is restricted in green, and in areas where trawling/dredging is not restricted in red. Alongside is an inset map, with a higher resolution showing the type of PMFs which are not in region with restrictions/bans on bottom-towed fishing - indicating that a high proportion of kelp beds are in regions without restrictions on bottom-towed fishing.

Image: Figure 38. Priority Marine Features (PMFs) in areas where bottom-towed fishing is restricted (green) and in areas where trawling/dredging is not restricted (red).

Schematic image showing the effect of sea level rise on saltmarshes in coastal regions without seawalls (saltmarsh habitat migrates inland) and with sea walls (seawall prevents saltmarsh from migrating inland leading to a contraction of the area of saltmarsh known as 'coastal squeeze').

Image: Figure 39. The effect of built sea defences of saltmarsh migration, through coastal squeeze

Diagram showing the key acts empowering Scottish Ministers to protect blue carbon species and habitats, on the basis of their contributions to Scotland's biodiversity

Image: Figure 40. Key Acts protecting blue carbon's biodiversity contributions

Diagram showing the current protection, and opportunities for protection, of listed blue carbon species/habitats under the Marine Acts (UK Marine & Coastal Access Act 2009 and Marine (Scotland) Act 2010).

Image: Figure 41. Current protection, and opportunities for protection, of blue carbon species and habitats under the Marine Acts.

Map of Scottish Adjacent waters showing regions designated as Nature Conservation Marine Protected Areas and Special Areas of Conservation (SACs).

Image: Figure 42. Scotland's Nature Conservation Marine Protected Areas (MPAs) and Special Areas of Conservation (SACs) within Scottish adjacent waters.

Timeline of the international commitments made by Scotland to protect biodiversity, showing Ramsar Convention of Wetlands (1971), OSPAR convention (1992), Convention on Biological Diversity (Aichi 2010 targets) and UN Sustainable Development Goals (SDG) - 'Life Below Water' (2015).

Image: Figure 46. Scotland's key international commitments to protecting biodiversity

Diagram showing blue carbon features that can be used to designate Nature Conservation Marine Protected Areas (Under the Marine Acts) and Special Areas of Conservation (Under the Conservation (Natural Habitats, &c.) Regulations 1994).

Image: Figure 43. Blue carbon features that can be used to designate Nature Conservation Marine Protected Areas (Under the Marine Acts) and Special Areas of Conservation (Under the Conservation (Natural Habitats, &c.) Regulations 1994). Grey boxes indicate the powers with the Acts, dashed lines indicate the habitats/species currently protected within some MPAs.

Map of Scotland showing the Marine Protected Areas and Special Areas of Conservation (SACs) wherein a blue carbon feature is protected, either as a conservation priority or a conservation and restoration priority.

Image: Figure 44. Marine Protected Areas (MPAs) and Special Areas of Conservation (SACs) with a designated feature that is a blue carbon habitat/species. Biogenic reefs are the protected feature in all SACs.

Map of South Arran Marine Protected Area, showing regions where all fishing is prohibited, demsersal trawl and dredging is prohibited, demersal, dredge and creels prohibited, dredge prohibited and demersal trawl only permitted subject to conditions.

Image: Figure 45. South Arran Marine Protected Area, showing restrictions to fishing activities

Map of the North-East Atlantic showing the five OSPAR regions.

Image: Figure 47. OSPAR Marine Regions

Image depicting the 17 UN sustainable development goals

Image: Figure 48. UN sustainable development goals

Diagram showing sections of the Marine Acts which require regard to climate change mitigation and adaptation, highlighting that no MPAs are currently designated solely on the basis of "regard to the extent to which MPA will contribute to the mitigation of Climate Change"

Image: Figure 49. Sections of the Marine Acts which require regard to climate change mitigation and adaptation

Diagram showing the plans and programmes required by the Climate Change Acts, showing the regard to which the CCP must consider carbon storage when designating MPAs under the Marine Scotland Act.

Image: Figure 50. Plans and Programmes required by the Climate Change Acts, showing that the CCP must set out policies and proposals to consider carbon storage when designating MPAs under the Marine Scotland Act (shown on the left). Grey boxes indicate the requirements set out in the Acts. Dashed line and blue text indicates the consideration of blue carbon in the CCP and the CCPu.

Schematic image depicting the preliminary principles underpinning Nature-based solutions, including ecosystem approaches (protection,issue-specific,infrastructure,management and restoration) to societal challenges, leading to human well-being and biodiversity benefits.

Image: Figure 51. Preliminary principles underpinning Nature-based solutions

Photographic image of a restored saltmarsh in Eden Estuary

Image: Figure 52. Restored saltmarsh in Eden Estuary

Schematic image depicting examples of proposed geoengineering strategies, separated into Radiation Management (RM - Space mirrors, reflective aerosols, cloud seeding) and Carbon Dioxide Removal (CDR - iron fertilisation, alkalinity addition, artificial upwelling, direct injection of carbon into rocks, biochar afforestation)

Image: Figure 53. Proposed geoengineering strategies

Chapman, S.J., Bell, J., Donnelly, D., & Lilly, A. (2009). Carbon stocks in Scottish peatlands. Soil Use and Management, 25, 105-112.

Turrell, W.R. (2020). A Compendium of Marine Related Carbon Stores, Sequestrations and Emissions. Scottish Marine and Freshwater Science Vol 11 No 1, 70pp. Retrieved from https://data.marine.gov.scot/dataset/compendium-marine-related-carbon-stores-sequestrations-and-emissions

Forestry Commission. (2020). Forestry Statistics 2020. Retrieved from https://www.forestresearch.gov.uk/documents/7806/CompleteFS2020.pdf [accessed 12 February 2021]

Aitkenhead, M.J., & Coull, M.C. (2016). Mapping soil carbon stocks across Scotland using a neural network model. Geoderma, 15, 187-198.

Burrows, M.T., Kamenos, N.A., Hughes, D.J., Stahl , H., Howe, J.A., & Tett, P. (2014). Assessment of carbon budgets and potential blue carbon stores in Scotland’s coastal and marine environment. Project Report. Scottish Natural Heritage, Edinburgh.

Thistlethwaite, G., Smith, H., Brown, P., MacCarthy, J., Pang, Y., Passant, N., … Misselbrook, T. (2020). Report: Greenhouse Gas Inventories for England, Scotland, Wales & Northern Ireland: 1990-2018. Retrieved from https://naei.beis.gov.uk/reports/reports?report_id=1000

Forestry Commission . (2018). Forestry Statistics 2018: Chapter 4: UK Forests and Climate Change. Retrieved from https://www.forestresearch.gov.uk/documents/5267/ch4_climatechange_FS2018.pdf [accessed 17 2021]

Nellemann, C., & Corcoran, E. (2009). Blue Carbon: the role of healthy oceans in binding carbon: a rapid response assessment. (n.p.): UNEP/Earthprint.

IPCC. (2014). 2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands. Retrieved from https://www.ipcc.ch/publication/2013-supplement-to-the-2006-ipcc-guidelines-for-national-greenhouse-gas-inventories-wetlands/ [accessed 21 February 2021]

Smeaton, C., Hunt, C.A., Turrell, W., & Austin, W. (2021). Marine sedimentary carbon stocks of the United Kingdom’s Exclusive Economic Zone. Frontiers in Earth Science.

Beaumont, N.J., Jones, L., Garbutt, A., Hansom, J.D., & Toberman, M. (2014). The value of carbon sequestration and storage in coastal habitats. Estuarine, Coastal and Shelf Science, 137, 32-40.

Potouroglou, M. (2017). Assessing the role of intertidal seagrasses as coastal carbon sinks in Scotland. Retrieved from https://www.napier.ac.uk/~/media/worktribe/output-975386/assessing-the-role-of-intertidal-seagrasses-as-coastal-carbon-sinks-in-scotland.pdf [accessed 21 February 2021]

Mao, J., Burdett , H.L., McGill, R.A., Newton, J., Gulliver, P., & Kamenos, N.A. (2020). Carbon burial over the last four millennia is regulated by both climatic and land use change.. Global Change Biology , 4, 2496-2504.

Smeaton, C., & Austin, W.E.N. (2017). Sources, Sinks, and Subsidies: Terrestrial Carbon Storage in Mid-latitude Fjords. Journal of Geophysical Research: Biogeosciences, 122, 2754-2768.

Barlow, N.L.M., Long, A.J., Saher, M.H., Gehrels, W.R., Garnett, M.H., & Scaife, R.G. (2014). Salt-marsh reconstructions of relative sea-level change in the North Atlantic during the last 2000 years. Quarternary Science Reviews, 99, 1-16. doi: 10.1016/j.quascirev.2014.06.008

Haynes, T.A. (2016). Scottish saltmarsh survey national report. Scottish Natural Heritage Commissioned Report No. 786.

Chmura, G.L., Anisfeld, S.C., Cahoon, D.R., & Lynch, J.C. (2003). Global carbon sequestration in tidal, saline wetland soils. Global biogeochemical cycles, 17.

Barbier, E.B., Hacker, S.D., Kennedy, C., Koch, E.W., Stier, A.C., & Silliman, B.R. (2011). The value of estuarine and coastal ecosystem services. Ecological Monographs, 81, 169-183.

Reboreda, R., & Cacador, I. (2007). Halophyte vegetation influences in salt marsh retention capacity for heavy metals. Environmental Pollution, 146, 147-154.

Colclough, S., Fonseca, L., Astley, T., Thomas, K., & Watts, . (2005). Fish utilisation of managed realignments. Fisheries Management and Ecology , 12, 351-360.

Angus, S., Hansom, J.D., & Rennie, A. (2011). Habitat Change on Scotland’s Coasts - The Changing Nature of Scotland. Edinburgh: TSO Scotland.

Jones, M.L.M., Sowerby, A., Williams, D.L., & Jones, R.E. (2008). Factors controlling soil development in sand dunes: evidence from a coastal dune soil chronosequence. Plant Soil, 307, 219-234.

Angus, S., & Hansom, J. (2005). Machair nan Eilean Siar (Machair of the Western Isles). Scottish Geographical Journal , 121, 401-411.

Burrows, M.T., Hughes, D.J., Austin, W.E.N., Smeaton, C., Hicks, N., Howe, J.A., … Vare, L.L. (2017). Assessment of Blue Carbon Resources in Scotland’s Inshore Marine Protected Area Network. Scottish Natural Heritage Commissioned Report No. 957.

Green, A.E., Unsworth, R.K., Chadwick, M.A., & Jones, P.J. (2021). Historical analysis exposes catastrophic seagrass loss for the United Kingdom. Frontiers in Plant Science, 12, 261.

Fourqurean, J.W., Duarte, C.M., Kennedy, H., Marba, N., Holmer, M., Matero, M.A., … Serrano, O. (2012). Seagrass ecosystems as a globally significant carbon stock. Nature, 5, 505-509.

Beck , M.W., Heck, K.L., Able, K.W., Childers, D.L., Eggleston, D.B., Gillanders, B.M., … Orth, R.J. (2001). The identification, conservation, and management of estuarine and marine nurseries for fish and invertebrates: a better understanding of the habitats that serve as nurseries for marine species and the factors that create site-specific variability in nursery quality will improve conservation and management of these areas. Bioscience, 51, 633-641.

Lilley, R. (2017). Our Living Seas – Scotland’s Seagrass Meadows. Retrieved from https://scottishwildlifetrust.org.uk/2017/06/living-seas-scotlands-seagrass-meadows/ [accessed 13 2021]

Moore , C.J., Bates, C.R., Mair, J.M., Saunders, G.R., Harries, D.B., & Lyndon, A.R. (2009). Mapping serpulid worm reefs (Polychaeta: Serpulidae) for conservation management. Aquatic Conservation: Marine and Freshwater Ecosystems, 19, 226-236.

Migne, A., Davoult, D., & Gattuso, J.P. (1998). Calcium carbonate production of a dense population of the brittle star Ophiothrix fragilis (Echinodermata: Ophiuroidea): role in the carbon cycle of a temperate coastal ecosystem. Marine Ecology Progress Series, 173, 305-308.

Gormley, K.S., Porter, J.S., Bell, M.C., Hull, A.D., & Sanderson, W.G. (2013). Predictive habitat modelling as a tool to assess the change in distribution and extent of an OSPAR priority habitat under an increased ocean temperature scenario: consequences for marine protected area networks and management. PloS one, 8.

Beck , M.W., Brumbaugh, R.D., Airoldi, L., Carranza, A., Coen, L.D., Crawford, C., … Guo, X. (2011). Oyster Reefs at Risk and Recommendations for Conservation, Restoration, and Management. BioScience, 61, 107-116.

Coen, L., Brumbaugh, R.D., Bushek, D., Grizzle, R., Luckenbach, M.W., Posey, M., … Gregory Tolley, S. (2007). Ecosystem services related to oyster restoration. Marine Ecology Progress Series, 341, 303-307.

Scyphers, S.B., Powers, S.P., Heck, K.L., & Byron, D. (2011). Oyster reefs as natural breakwaters mitigate shoreline loss and facilitate fisheries. PloS one, 6.

Foster, M.S. (2001). Rhodoliths: between rocks and soft places. Journal of Phycology , 27, 659-667.

Hall-Spencer, J.M., Grall, J., Moore, P.G., & Atkinson, R.J.A. (2003). Bivalve fishing and maerl-bed conservation in France and the UK—retrospect and prospect. Aquatic Conservation: Marine and Freshwater Ecosystems, 13, 33-41.

Scottish Government. (2017). Review of PMFs outside the Scottish MPA network - Maerl beds. Retrieved from https://consult.gov.scot/marine-scotland/priority-marine-features/supporting_documents/Review%20of%20PMFs%20outside%20the%20Scottish%20MPA%20network%20%20FINAL%20%20Maerl%20beds.pdf [accessed 13 February 2021]

Porter, J., Austin, W.E.N., Burrows, M.T., Clarke, D., Davies, G., Kamenos, N., … Want, A. (2020). Blue carbon audit of Orkney waters. Scottish Marine and Freshwater Science, 11, 96.

Marine Scotland . (2020). Scotland's Marine Assessment 2020: Case Study Blue Carbon Scottish Maerl Beds. Retrieved from https://marine.gov.scot/sma/assessment/case-study-blue-carbon-scottish-maerl-beds [accessed 13 February 2021]

Elliott, S.A., Turrell, W.R., Heath, M.R., & Bailey, D.M. (2017). Juvenile gadoid habitat and ontogenetic shift observations using stereo-video baited cameras. Marine Ecology Progress Series , 568, 123-135.

Kamenos, N.A., Moore, P.G., & Hall-Spencer, J.M. (2004). Small-scale distribution of juvenile gadoids in shallow inshore waters; what role does maerl play?. ICES journal of marine science, 61, 422-429.

Burrows, M.T., Fox, C.J., Moore, P., Smale, D., Sotheran, I., Benson, A., … Allen, C.J. (2018). Wild Seaweed Harvesting as a Diversification Opportunity for Fishermen. A report by SRSL for HIE, 171.

Mann, K.H. (2000). Ecology of coastal waters: with implications for management. Oxford: Blackwell Science.

Smale, D. A., Burrows, M. T., Moore, P., O'Connor, N., & Hawkins, S. J. (2013). Threats and knowledge gaps for ecosystem services provided by kelp forests: a northeast Atlantic perspective. Ecology and Evolution, 3(11), 4016-4038. DOI: 10.1002/ece3.774. Retrieved from: https://pure.qub.ac.uk/portal/files/5970848/Smale_et_al_13.pdf [accessed 29th October 2018].

Smale, D.A., Burrows, M.T., Evans, A.J., King, N., Sayer, M.D., Yunnie, A.L., … Moore, P.J. (2016). Linking environmental variables with regional-scale variability in ecological structure and standing stock of carbon within UK kelp forests. Marine Ecology Progress Series, 542, 79-95.

Krause-Jenson, D., & Duarte, C. (2016). Substantial role of macroalgae in marine carbon sequestration. Nature Geoscience, 9, 737-742.

Ortega, A., Geraldi, N.R., Alam, I., Kamau, A.A., Acinas, S.G., Logares, R., … Duarte, C.M. (2019). Important contribution of macroalgae to oceanic carbon sequestration. Nature Geoscience, 12, 748-754.

Shaffer, J.A., Munsch, S.H., & Cordell, J.R. (2020). Kelp Forest Zooplankton, Forage Fishes, and Juvenile Salmonids of the Northeast Pacific Nearshore. Marine and Coastal Fisheries, 12, 4-20.

Gibbs, H.K., Brown, S., Niles, J.O., & Foley, J.A. (2007). Monitoring and estimating tropical forest carbon stocks: making REDD a reality. Environmental Research Letters, 2, 45023.

Diesing , M., Mitchell, P., & Stephens, D. (2016). Image-based seabed classification: what can we learn from terrestrial remote sensing?. ICES Journal of Marine Science, 73, 2425-2441.

Smeaton, C., & Austin, W.E.N. (2019). Where’s the Carbon: Exploring the Spatial Heterogeneity of Sedimentary Carbon in Mid-Latitude Fjords. Frontiers in Earth Science, 7, 269.

Hunt, C., Demsar, U., Dove, D., Smeaton, C., Cooper, R., & Austin, W.E.N. (2020). Quantifying Marine Sedimentary Carbon: A New Spatial Analysis Approach Using Seafloor Acoustics, Imagery, and Ground-Truthing Data in Scotland. Frontiers in Marine Science , 7.

Diesing, M., Kroger, S., Parker, R., Jenkins, C., Mason, C., & Weston, K. (2017). Predicting the standing stock of organic carbon in surface sediments of the North–West European continental shelf. Biogeochemistry, 135, 183-200.

Gillibrand, P.A., Cromey, C.J., Black, K.D., Inall, M.E., & Gontarek, S.J. (2006). Identifying the risk of deoxygenation in Scottish sea lochs with isolated deep water. Scottish Aquaculture Research Forum, SARF, 7.

Scotland's Soils. (2019). Peatland restoration. Retrieved from https://soils.environment.gov.scot/resources/peatland-restoration/#:~:text=Scotland%27s%20peat%20soils%20cover%20more,storing%20carbon%20in%20the%20soil. [accessed 22 February 2021]

Climate Change Committee. (2020). Reducing emissions in Scotland – 2020 Progress Report to Parliament. Retrieved from https://www.theccc.org.uk/publication/reducing-emissions-in-scotland-2020-progress-report-to-parliament/

Scottish Government. (2021, February). Scottish Greenhouse Gas Statistics: Future revisions to data associated with the incorporation of the IPCC Wetlands Supplement (2013) . Retrieved from https://www.gov.scot/binaries/content/documents/govscot/publications/statistics/2021/02/future-revisions-to-scottish-greenhouse-gas-statistics-associated-with-ipcc-wetlands-supplement/documents/future-revisions-to-scottish-greenhouse-gas-statistics-associated-with-ipcc-wetlands-supplement/future-revisions-to-scottish-greenhouse-gas-statistics-associated-with-ipcc-wetlands-supplement/govscot%3Adocument/GHG_2021_02.pdf [accessed 18 March 2021]

Scottish Government. (2018). Greenhouse gas emissions 2018: estimates. Retrieved from https://www.gov.scot/publications/scottish-greenhouse-gas-emissions-2018/pages/1/ [accessed 13 February 2021]

McLeod, E., Chmura , G., Bouillon, S., Salm, R., Bjork, M., Duarte, C., … Silliman, B. (2011). A blueprint for blue carbon: toward an improved understanding of the role of vegatated coastal habitats in sequestering CO2. Frontiers in Ecology and the Environment, 9, 552-560.

Collins, M.J. (1986). Taphonomic processes in a deep water Modiolus-brachiopod assemblage from the west coast of Scotland. Retrieved from https://core.ac.uk/download/pdf/211234226.pdf [accessed 21 February 2021]

Lee, H.Z.L., Davies, I.M., Baxter, J.M., Diele, K., & Sanderson, W.G. (2020). Missing the full story: First estimates of carbon deposition rates for the European flat oyster, Ostrea edulis. Aquatic Conservation, 30, 2076-2086.

Scottish Forestry . (2020). Climate Mitigation: Woodland creation and management. Retrieved from https://forestry.gov.scot/publications/973-information-note-climate-mitigation-woodland-creation-and-management/viewdocument

The James Hutton Institute. (2016). Peatlands. Retrieved from https://www.hutton.ac.uk/sites/default/files/files/publications/Peatlands%20final_web_reduced%20size.pdf [accessed 2 March 2021]

Artz, R.R.E., Chapman, S.J., Donnelly, D., & Matthews, R.B. (2011). Potential Abatement from Peatland Restoration. Retrieved from https://www.climatexchange.org.uk/media/1501/research_summary_potential_abatement_from_peatland_restoration.pdf [accessed 17 February 2021]

Clymo , R.S., Turunen , J., & Tolonen, K. (1998). Carbon Accumulation in Peatland. Oikos, 81, 368-388.

OSPAR Commission. (2008). Case Reports for the OSPAR List of Threatened and/or Declining Species and Habitats: Maerl Beds. Retrieved from https://www.ospar.org/site/assets/files/1892/maerl_beds.pdf [accessed 21 February 2021]

Lindboom , H.J., & de Groot, S.J. (1998). The effects of different types of fisheries on the North Sea and Irish Sea benthic invertebrates. Netherlands Institute of Sea Fisheries, Texel.

O'Neill, F.G., & Ivanovic, A. (2016). The physical impact of towed demersal fishing gears on soft sediments . ICES Journal of Marine Science, 73, 5-14.

van de Velde, S., Van Lancker, V., Hidalgo-Martinez, S., Berelson, W.M., & Meysman, F.J. (2018). Anthropogenic disturbance keeps the coastal seafloor biogeochemistry in a transient state. Scientific Reports, 8, 1-10.

Tillin , H.M., Hull, S.C., & Tyler-Walters, H. (2010). Development of a Sensitivity Matrix (pressures-MCZ/MPA features). Report to the Department of Environment, Food and Rural Affairs from ABPMer, Southampton and the Marine Life Information Network (MarLIN) Plymouth: Marine Biological Association of the UK. .Defra Contract No. MB0102 Task 3A, Report No. 22.. Retrieved from http://plymsea.ac.uk/id/eprint/7030/1/MB0102_9721_TRP%20(14)%20(1).pdf [accessed 13 February 2021]

SIFT. (2018). Protection for Scotland’s kelp forests. Retrieved from https://www.sift.scot/wp-content/uploads/2019/01/SIFT-Kelp-Briefing.pdf [accessed 12 February 2021]

United Nations Environment Programme . (2009). Submarine cables and the oceans: connecting the world. Retrieved from https://www.iscpc.org/documents/?id=132 [accessed 12 February 2021]

Collins, K.J., Suonpää, A.M., & Mallinson, J.J. (2010). The impacts of anchoring and mooring in seagrass, Studland Bay, Dorset, UK. Underwater Technology , 29, 117-123.

European Commission. (2015). Protecting seagrass from anchor damage: new recommendations. Retrieved from https://ec.europa.eu/environment/integration/research/newsalert/pdf/new_recommendations_for_protecting_seagrass_against_anchor_damage_411na3_en.pdf [accessed 15 February 2021]

Dunkley , F., & Solandt, J. (2021). Marine unProtected Areas: A case for a just transition to ban bottom trawl and dredge fishing in offshore Marine Protected Areas. Retrieved from https://www.mcsuk.org/media/marine-unprotected-areas-full-report.pdf [accessed 12 February 2021]

Paradis, S., Goni, M., Masque, P., Duran, R., Arjona-Camas, M., Palanques, A., … Puig, P. (2021). Persistence of Biogeochemical Alterations of Deep-Sea Sediments by Bottom Trawling. Geophysical Research Letters, 48.

JNCC. (2013). Scottish MPA Project Fisheries Management Guidance: Coral Gardens. Retrieved from https://data.jncc.gov.uk/data/2d7638f7-cdd5-4153-8abb-9d33c5e02bf8/SMPA-fish-man-guidance-coral-gardens-July2013.pdf [accessed 14 February 2021]

Harrison, J. (2019). Saving our Seas through Law Briefing No. 4 - Legal Tools for the Management of Marine Protected Areas in Scotland. Edinburgh Law School.

Langton, R., Stirling, D., Boulcott, P., & Wright, P.J. (2020). Are MPAs effective in removing fishing pressure from benthic species and habitats?. Biological Conservation, 247.

Luisetti, T., Turner, R.K., Andrews, J.E., Jickells, T.D., Kroger, S., Diesing, M., … Weston, K. (2019). Quantifying and valuing carbon flows and stores in coastal and shelf ecosystems in the UK. Ecosystem services, 35, 67-76.

Sala, E., Mayorga, J., Bradley, D., Cabral, R., Atwood, T., Auber, A., … Lubchenco, J. (2021). Protecting the global ocean for biodiversity, food and climate. Nature. doi: https://doi.org/10.1038/s41586-021-03371-z

Kaiser, M.J., Clarke , K.R., Hinz , H., Austen, M.C.V., Somerfield, P.J., & Karakassis, I. (2006). Global analysis of response and recovery of benthic biota to fishing. Marine Ecology Progress Series, 311, 1-14.

Stirling, D.A., Boulcott, P., Scott, B.E., & Wright, P.J. (2016). Using verified species distribution models to inform the conservation of a rare marine species. Diversity and Distributions, 22, 808-822.

Hall-Spencer, J.M., & Moore, P.G. (2000). Scallop dredging has profound, long-term impacts on maerl habitats. ICES Journal of marine science, 57, 1407-1415.

Trigg, C., & Moore, C.G. (2009). Recovery of the biogenic nest habitat of Limaria hians (Mollusca: Limacea) following anthropogenic disturbance. Estuarine, Coastal and Shelf Science, 82, 351-356.

Doney, S.C., Fabry, V.J., Feely, R.A., & Kleypas, J.A. (2009). Ocean acidification: the other CO2 problem. Annual review of marine science, 15, 169-192.

Marine Scotland. (2020). Scotland's Marine Assessment: Ocean Acidification. Retrieved from http://marine.gov.scot/sma/assessment/ocean-acidification [accessed 13 February 2021]

Simon-Nutbrown, C., Hollingsworth, P.M., Fernandes, T.F., Kamphausen, L., Baxter, J.M., & Burdett, H.L. (2020). Species Distribution Modeling Predicts Significant Declines in Coralline Algae Populations Under Projected Climate Change With Implications for Conservation Policy. Frontiers in Marine Science , 7.

Findlay, H., Artioli, Y., Navas, J., Hennige, S., Wicks, L., Huvenne, V., … Roberts, M. (2013). Tidal downwelling and implications for the carbon biogeochemistry of cold-water corals in relation to future ocean acidification and warming. Global Change Biology, 19, 2708-2719.

Zhao, X., Guo, C., Han, Y., Che, Z., Wang, Y., Wang, X., … Liu, G. (2017). Ocean acidification decreases mussel byssal attachment strength and induces molecular byssal responses. Marine Ecology Progress Series, 565, 67-77.

Marine Climate Change Impacts Partnership . (2018). Maerl beds. Retrieved from http://www.mccip.org.uk/climate-smart-adaptation/climate-change-and-marine-conservation/ [accessed 12 February 2021]

Queste , B.Y., Fernand, L., Jickells, T.D., & Heywood, K.J. (2013). Spatial extent and historical context of North Sea oxygen depletion in August 2010. Biogeochemistry, 113, 53-68.

Vaquer-Sunyer, R., & Duarte, C.M. (2008). Thresholds of hypoxia for marine biodiversity. PNAS, 105, 15452-15457.

Marine Life Information Network. (2018). Phymatolithon calcareum maerl beds with Neopentadactyla mixta and other echinoderms in deeper infralittoral clean gravel or coarse sand. Retrieved from https://www.marlin.ac.uk/habitats/detail/64 [accessed 14 February 2021]

Marine Scotland. (2013). FEAST - Feature Activity Sensitivity Tool. Retrieved from https://www.marine.scotland.gov.uk/feast/Index.aspx [accessed 13 February 2021]

Crowder, L.B., Ng, C.A., Frawley, T.H., Low, N.H.N., & Micheli, F. (2019). The significance of ocean deoxygenation for kelp and other macroalgae in Ocean deoxygenation: everyone's problem. Retrieved from https://portals.iucn.org/library/sites/library/files/documents/08.3%20DEOX.pdf [accessed 13 February 2021]

Diaz, R.J., & Rosenberg, R. (2008). Spreading dead zones and consequences for marine ecosystems. Science , 321, 926-929.

Scottish Government. (2011). Scotland's Marine Atlas: Information for The National Marine Plan: TEMPERATURE, SALINITY AND OCEAN ACIDIFICATION. Retrieved from https://www.gov.scot/publications/scotlands-marine-atlas-information-national-marine-plan/pages/9/ [accessed 20 February 2021]

Burden, A., Smeaton, C., Angus, S., Garbutt, A., Jones, L., Lewis, H., … Rees, S. (2020). Impacts of climate change on coastal habitats, relevant to the coastal and marine environment around the UK. MCCIP Science Review 2020.

Short, F.T., Polidoro, B., Livingstone, S.R., Carpenter, K.E., Bandeira, S., Bujang, J.S., … Erftemeijer, P.L. (2011). Extinction risk assessment of the world’s seagrass species. Biological Conservation, 144, 1961-1971.

Martin, S., & Hall-Spencer, J.M. (2017). Effects of ocean warming and acidification on rhodolith/maërl beds. In Rhodolith/maërl beds: A global perspective. Cham: Springer.

Smale, D. (2020). Impacts of ocean warming on kelp forest ecosystems. New Phytologist, 225, 1447-1454.

Fernández, C. (2011). The retreat of large brown seaweeds on the north coast of Spain: the case of Saccorhiza polyschides. European Journal of Phycology, 46, 352-360.

Morris, R., Reach, I., Duffy, M., Collins, T., & Leafe, R. (2004). On the loss of saltmarshes in south-eas England and the relationship with Nereis diversicolor. Journal of Applied Ecology, 41.

van Lent, F., Verschuure, J.M., & van Veghel, M.L. (1995). Comparative study on populations of Zostera marina L.(eelgrass): in situ nitrogen enrichment and light manipulation. Journal of Experimental Marine Biology and Ecology, 185, 55-76.

Fraser, M.W., & Kendrick, G.A. (2017). Belowground stressors and long-term seagrass declines in a historically degraded seagrass ecosystem after improved water quality. Scientific Reports, 7, 14469.

Davison, D.M., & Hughes, D.J. (1998). Zostera Biotopes (volume I). An overview of dynamics and sensitivity characteristics for conservation management of marine SACs. Scottish Association for Marine Science (UK Marine SACs Project).

Preen, A., & Marsh, H. (1995). Response of dugongs to large-scale loss of seagrass from Hervey Bay, Queensland Australia . Wildlife Research, 22, 507.

Scottish Government. (n.d.) Priority Marine Features. Retrieved from https://www.gov.scot/policies/marine-environment/priority-marine-features/

Nature Scot . (2016). Descriptions of Scottish Priority Marine Features (PMFs) . Retrieved from https://www.nature.scot/sites/default/files/Publication%202016%20-%20SNH%20Commissioned%20Report%20406%20-%20Descriptions%20of%20Scottish%20Priority%20Marine%20Features%20%28PMFs%29.pdf

Scottish Government . (2017). Guidelines for Selecting & Developing MPAs. Retrieved from https://www.webarchive.org.uk/wayback/archive/3000/https://www.gov.scot/Resource/0051/00515466.pdf

Carruthers, M., Chaniotis, P.D., Clark, L., Crawford-Avis, O., Gillham, K., Linwood, M., … Wilson, E. (2011). Contribution of existing protected areas to the MPA network and identification of remaining MPA search feature priorities. Internal report produced by Scottish Natural Heritage, the Joint Nature Conservation Committee and Marine Scotland for the Scottish Marine Protected Areas Project.

Scottish Natural Heritage and the Joint Nature Conservation Committee. (2012). Advice to the Scottish Government on the selection of Nature Conservation Marine Protected Areas (MPAs) for the development of the Scottish MPA network. Scottish Natural Heritage Commissioned Report No. 547.

Nature Scot. (2019). Habitats (listed on Annex I) and species (listed on Annex II) of the Habitats Directive which occur in Scotland and for which Special Areas of Conservation are selected. Retrieved from https://www.nature.scot/sites/default/files/2019-02/Common%20names%20for%20Annex%20I%20habitats%20and%20Annex%20II%20species.pdf

Scottish Government. (2020). The North-east Lewis Nature Conservation Marine Protected Area Order 2020. Retrieved from https://consult.gov.scot/marine-conservation/smallislesdoconsultation2016/supporting_documents/Small%20Isles%20DO%202014.pdf [accessed 21 February 2021]

Nature Scot. (2014). South Arran MPA diver survey of maerl beds, kelp and seaweed communities on sublittoral sediment, and seagrass beds 2014. Retrieved from https://www.nature.scot/sites/default/files/2018-12/Publication%202018%20-%20SNH%20Research%20Report%20882%20-%20South%20Arran%20MPA%20diver%20survey%20of%20maerl%20beds%2C%20kelp%20and%20seaweed%20communities%20on%20sublittoral%20sediment%20and%20seagrass%20beds%202014.pdf [accessed 21 February 2021]

Harrison, J. (2019). Saving our Seas through Law Briefing No. 1 - The Establishment and Expansion of the Scottish Marine Protected Area Network. Edinburgh Law School.

NatureScot. (2020, August 3). Sites of Special Scientific Interest (SSSIs). Retrieved from https://www.nature.scot/professional-advice/protected-areas-and-species/protected-areas/national-designations/sites-special-scientific-interest-sssis#:~:text=Scotland%20has%201%2C422%20SSSIs%2C%20covering,to%20more%20than%2029%2C000%20hectares. [accessed 18 March 2021]

Rees, S., Angus, S., Creer, J., Lewis, H., & Mills, R. (2019). Guidelines for the selection of biological SSSIs. Part 2 Detailed guidelines for Habitats and Species. Chapter 1a Coastlands (coastal saltmarsh, sand dune, machair, shingle, and maritime cliff and slopes, habitats). Retrieved from https://hub.jncc.gov.uk/assets/36b59d93-8487-471d-9428-bc3d7dff0423

Brazier, D.P., Hiorns, N., Kirkham, E., Singfield, C., Street, M., Steel, L., … Kent, F. (2019). Guidelines for the selection of biological SSSIs. Part 2 Detailed guidelines for Habitats and Species. Chapter 1b Marine Intertidal and Shallow Subtidal Habitats. Retrieved from https://hub.jncc.gov.uk/assets/3e8b58d8-ff6b-4bc6-ba4f-aeed92710e14 [accessed 28 February 2021]

Nature Scot. (2017). Saltmarsh. Retrieved from https://www.nature.scot/landscapes-and-habitats/habitat-types/coast-and-seas/coastal-habitats/saltmarsh [accessed 17 February 2021]

Scottish Natural Heritage. (2014). NatureScot Commissioned Report 747: NatureScot's advice on selected responses to the 2013 Marine Scotland consultation on Nature Conservation Marine Protected Areas (MPAs). Retrieved from https://www.nature.scot/naturescot-commissioned-report-747-naturescots-advice-selected-responses-2013-marine-scotland [accessed 13 March 2021]

Scottish Government. (2018). Marine Protected Area Network - 2018 Report to the Scottish Parliament. Retrieved from https://www.gov.scot/publications/marine-protected-area-network-2018-report-scottish-parliament/ [accessed 13 March 2021]

Environment, Climate Change and Land Reform Committee. (2021, February 2). Official Report. Retrieved from http://www.parliament.scot/parliamentarybusiness/report.aspx?r=13096&mode=pdf

Environment, Climate Change and Land Reform Committee. (2021, February 21). 4th Meeting Agenda - Climate Change Plan: Evidence sessions with stakeholders. Retrieved from https://www.parliament.scot/S5_Environment/Meeting%20Papers/ECCLR_2021.02.02_Meeting_papers_(public).pdf

Environment, Climate Change and Land Reform Committee. (2021, March 4). ECCLR Committee response to the draft updated climate change plan (CCPu). Retrieved from https://www.parliament.scot/S5_Environment/Reports/ECCLR_2021.03.04_OUT_CS_CCPu_Report.pdf

National Academies of Sciences, Engineering, and Medicine. (2019). Negative Emissions Technologies and Reliable Sequestration: A Research Agenda. Washington, DC: The National Academies Press.

Worthington, T., & Spalding, M. (2018). Mangrove Restoration Potential: A global map highlighting a critical opportunity. Retrieved from https://oceanwealth.org/wp-content/uploads/2019/02/MANGROVE-TNC-REPORT-FINAL.31.10.LOWSINGLES.pdf

Maynard, C., McManus, J., Crawford, R.M., & Paterson, D. (2011). A comparison of short-term sediment deposition between natural and transplanted saltmarsh after saltmarsh restoration in the Eden Estuary (Scotland). Pkant Ecology & Diversity , 4, 103-113.

Taylor, B. (2019). Saltmarsh restoration and blue carbon dynamics in a Scottish estuary. Retrieved from https://research-repository.st-andrews.ac.uk/handle/10023/20891 [accessed 15 February 2021]

Wade, K. (2018). The biodiversity, ecosystem functioning and value of restored salt marshes in the Eden Estuary, Scotland. Retrieved from https://research-repository.st-andrews.ac.uk/handle/10023/17541 [accessed 12 February 2021]

Hansom, J.D., Fitton, J.M., & Rennie, A.F. (2017). Dynamic Coast - National Coastal Change Assessment: Coastal Erosion Policy Context, CRW2014/2. Retrieved from http://www.dynamiccoast.com/files/reports/NCCA%20-%20Coastal%20Erosion%20Policy%20Context.pdf [accessed 24 February 2021]

Chung, I.K., Sondak, C.F.A., & Beardall, J. (2017). The future of aquaculture in a rapidly changing world. European Journal of Phycology, 52, 495-505.

GESAMP. (2019). High level review of a wide range of proposed marine geoengineering techniques”. (Boyd, P.W. and Vivian, C.M.G., eds.). (IMO/FAO/UNESCO-IOC/UNIDO/WMO/IAEA/UN/UN Environment/ UNDP/ISA Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection). Retrieved from http://www.gesamp.org/publications/high-level-review-of-a-wide-range-of-proposed-marine-geoengineering-techniques

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