| Scotland |
Scottish Natural Heritage |
S1377 |
<I>Phymatolithon calcareum</I> |
Maerl (Phymatolithon calcareum) |
Yes |
No |
No |
Estimate based on partial data with some extrapolation and/or modelling |
1993-2012 |
No |
No |
MATL - Atlantic Marine |
"Bates, C. R., Moore, C. G., Harries,D. B., Austin, W. and Lyndon, A.R. (2004). Broad scale mapping of sublittoral habitats in Loch Sunart, Scotland. Scottish Natural Heritage Commissioned Report No. 006 (ROAME No. F01AA401C) www.snh.gov.uk/publications-data-and-research/publications/search-the-catalogue/publication-detail/?id=422
Birkett, D.A., Maggs, C.A. & Dring, M.J. (1998). Maerl (Volume V). An overview of dynamic and sensitivity characteristics for conservation management of marine SACs. Scottish Association for Marine Science (UK Marine SAC Project) www.ukmarinesac.org.uk/pdfs/maerl.pdf
Davies, J. and Hall-Spencer, J.M. (1996). Mapping of the benthic biotopes in the proposed Sound of Arisaig Special Area of Conservation. Scottish Natural Heritage / Biomar Research Survey and Monitoring Report no. 83.
Howson, C.M. and Donnan, D.W. (2000) Trials of monitoring techniques for biotopes in the Sound of Arisaig cSAC. Scottish Natural Heritage Commissioned Report F98PAO9
Kamenos, N.A., Moore, P.G. & Hall-Spencer, J.M. (2003). Substratum heterogeneity of dredged vs un-dredged maerl grounds. J.Mar.Biol.Ass.UK, 83, 411-413
Mercer, T., Howson, C. M., and Moore, J. J. (2007). Site Condition Monitoring: Loch Sunart marine SAC and SSSI. Scottish Natural Heritage Commissioned Report No. 286 (ROAME No. R06AC701) www.snh.gov.uk/publications-data-and-research/publications/search-the-catalogue/publication-detail/?id=1332
Moore, C.G., Lyndon, A.R. and Mair, J.M. (2004). The establishment of site condition monitoring of marine sedimentary habitats in the Sound of Arisaig cSAC. Scottish Natural Heritage Commissioned Report No. 071 (ROAME No. F02AA409) www.snh.gov.uk/publications-data-and-research/publications/search-the-catalogue/publication-detail/?id=488
Moore, C.G., Saunders, G., Mair, J.M. and Lyndon, A.R. (2006). The inauguration of site condition monitoring of marine features of Loch Maddy Special Area of Conservation. Scottish Natural Heritage Commissioned Report No. 152 (ROAME No. F02AA409) www.snh.gov.uk/publications-data-and-research/publications/search-the-catalogue/publication-detail/?id=576"
|
11600 |
Estimate based on partial data with some extrapolation and/or modelling |
|
unknown |
|
|
|
unknown |
|
|
|
|
Yes |
As previous report - based on best expert judgement current range is sufficient to be considered suitable for survival of maerl for the forseeable future |
No |
Yes |
No |
area covered by population in m2 |
6870000 |
6870000 |
number of localities |
6 |
6 |
SAC sites: there are a total of 6 SACS with marine component which contain maerl as a feature (as per the CSM spreadsheet). The population size above, i.e 6.87 km2, is based on the extent of maerl in these sites.
This is only a portion of the maerl in Scotland but there is no information to provide a more robust idea of the total extent and localition of maerl in Scotland.
Data on the comparative extent of live and dead maerl in Scotland is not available. |
|
A large caveat should be assigned to this feature as we currently have little information regarding the size and condition of beds within Scottish waters and only data within protected sites has been included within this assessment. Also live and dead maerl has not been separated in this assessment. |
2012-2012 |
Estimate based on partial data with some extrapolation and/or modelling |
2001-2012 |
unknown |
|
|
|
Estimate based on partial data with some extrapolation and/or modelling |
|
unknown |
|
|
|
2 |
|
|
Yes |
|
No |
Yes |
No |
6.87 |
2012-2012 |
Estimate based on expert opinion with no or minimal sampling |
Unknown |
As noted in previous report. It is estimated that the quality of the P. calcareum beds is likely to have been affected by activities such as aquaculture and fishing. This based on published studies, knowledge of the activities and expert jusdgement. However, the extent of this is unknown. |
2001-2012 |
unknown |
|
unknown |
6.87 |
No |
Yes |
No |
mainly based on expert judgement and other data |
expert opinion |
|
|
|
|
|
|
|
|
| Northern Ireland |
Northern Ireland Environment Agency |
S1377 |
<I>Phymatolithon calcareum</I> |
Maerl (Phymatolithon calcareum) |
Yes |
Yes |
No |
Estimate based on partial data with some extrapolation and/or modelling |
1980-2012 |
No |
No |
MATL - Atlantic Marine |
"ADEY, W.H. & MCKIBBEN, D.L. 1970. Studies on maerl species
Phymatolithon calcareum (pallas) nov. comb. and Lithothamnium
corallioides Crouan in Ria de Vigo. Bot. Mar., 13, 100-106.
BARBERA, C. et al 2003. Conservation and management of northeast
Atlantic and Mediterranean maerl beds. Aquatic Conservation: Marine and
Freshwater Ecosystems, 13, S65-S76.
BIOMAERL team, 2003. Conservation and management of N.E Atlantic and
Mediterranean maerl beds. Aquatic Conservation: Marine and Freshwater
Ecosystems, 13 (S1): 65-76.
BIRKETT, D.A. MAGGS, C.A. & DRING, M.J. 1998. Maerl (volume V).
An overview of dynamic and sensitivity characteristics for conservation
management of marine SACs. Scottish Association for Marine Science (UK
Marine SACs Project). 116 pp.
BLAKE, C. & MAGGS, C. 2003. Comparative growth rates and internal
banding periodicity of maerl species (Corallinales, Rhodophyta) from
northern Europe. Phycologia, 42 (6), 606-612.
BLAKE, C., REIMER, P. & MAGGS, C. 2005. Radiocarbon dating of maerl
beds in the British Isles. The 10th International Conference on Accelerator
Mass Spectrometry, Berkeley, CA..
BOSENCE, D. & WILSON, J. 2003. Maerl growth, carbonate production
and accumulation rates in the northeastern Atlantic. Aquatic Conservation:
Marine and Freshwater Ecosystems, 13, S21- S31.
BROWN, R.A. CURRY, R., DONAGHY, A., HUGHES, D., KITCHEN,
J.,MELLON, C. & NELSON, B. 1997. Biodiversity in Northern Ireland.
Priorities for Wildlife Conservation: A Discussion Document. RSPB,
Belfast.
CANALS, M. & BALLESTEROS, E. 1997 . Production of carbonate
particles by phytobenthic communities on the Mallorca-Menorca
shelf,northwestern Meditterean Sea. Deep-sea Res II, 44, 611-629.
COSTELLO, M.J. TIERNEY, P. & EMBLOW, C. 1997. Observations on
maerl records made during the biomar survey. Abstracts, Irish Maerl
Workshop, Martin Ryan Institute / University College Galway, 30 May
1997.
DAVIS, J. & HALL-SPENCER, J.M. 1996. Mapping of the benthic biotopes
in the proposed Sound of Arisaig Special Area of Conservation. Scottish
Natural Heritage / Biomar Research Survey and Monitoring Report no.83
|