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Metadata: 2001 Scottish Natural Heritage (SNH) Loch laxford sublittoral habitats joint broad-scale mapping survey
Abstract:
A comprehensive biotope mapping survey of the sublittoral habitats was undertaken in July 2001, by a collaborative research group comprising staff from the University of St Andrews, Heriot-Watt University and SNH. Rapid broadscale remote acoustic mapping techniques were utilised and 'groundtruth' data were collected to enable the interpretation of of acoustically classed seafloor maps. Groundtruthing data were collected in the field using a range of sampling techniques including diver-based observations with video and still cameras (19 stations), video imagery collected by remotely operated vehicle (ROV) or drop-down video (60 stations) and grab sampling of sedimentary habitats for infaunal and sediment analyses (23 stations). It is the diver survey data which is present in Marine Recorder.
Data holder:
NatureScot (HQ Inverness)
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 11622 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2001 Scottish Natural Heritage (SNH) Loch laxford sublittoral habitats joint broad-scale mapping survey |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | e70062ddfaa7dbbfde3fd57c04a363f4 |
| Resource Identifier | This is the code assigned by the data owner. | GB-SCT-SNH-ME-000065-MRSNH00100000002-LAXSUB |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2001-07-05 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2001-07-18 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | A comprehensive biotope mapping survey of the sublittoral habitats was undertaken in July 2001, by a collaborative research group comprising staff from the University of St Andrews, Heriot-Watt University and SNH. Rapid broadscale remote acoustic mapping techniques were utilised and 'groundtruth' data were collected to enable the interpretation of of acoustically classed seafloor maps. Groundtruthing data were collected in the field using a range of sampling techniques including diver-based observations with video and still cameras (19 stations), video imagery collected by remotely operated vehicle (ROV) or drop-down video (60 stations) and grab sampling of sedimentary habitats for infaunal and sediment analyses (23 stations). It is the diver survey data which is present in Marine Recorder. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Diver survey: 19 stations were sampled many using MNCR phase II recording methodology, diver vido at 9 stations and still photography at 2 stations. The level of survey quality was set as adequate for both flora and fauna. MNCR survey, site and habitat forms were completed. N.B. this is the data currently present in this Survey for Marine Recorder. ROV sampling: deployed at 28 stations predominantly in sedimentary areas, using dGPS for position fixing. At 16 stations ROV was used to record biotope zonation in infralittoral and circalittoral zones on the fringes of the Loch. N.B. this data does not appear to have been entered into Marine Recorder. Drop-down video sampling: deployed at 16 staions a drop-down video system was used with position fixing by means of non-differential GPS. Digital vido recordings of the sea bed were made for 5-20 minutes at each station. N.B. this data does not appear to have been entered into Marine Recorder. Grab sampling: Samples for macrobenthic infauna were taken at 23 stations. Single 0.1m2 Van Veen grab samples were taken. A subsample of around 100-150ml of sediment was taken from each sediment sample for grain size analysis before sieving the remainder through a 0.5mm mesh. The screenings were buffered on 10% formalin. N.B. this data does not appear to have been entered into Marine Recorder. Acoustic survey: Bathymetric sidescan and single beam acoustic mapping techniques were used at near 100% coverage to develop acoustically classed seafloor maps. AGDS and sidescan data were simultaneously acquired. A Furuno FCV292 dual frequency echosounder with 28kHz and 200kHz transducers and a Lowrence 300A with 50 kHz transducers. The use of alternative frequencies with different echosounders was undertaken in order to test AGDS methods for discriminating particular biotopes. The bathymetric sidescan used was a Submetricz System 2000 with 117kHz transducers. Acquisition settings varied with transmit lengths of 18-100cps (77-424?sec), a ping rate of 3-5 per second and 2048 sample receiver length. Sound velocity measurements were acquired at the site but no depth stratification was noted and thus velocities of 1498ms-1 were used for ray tracing throughout the site. The transducers were bow-mounted on the survey vessel with the motion reference unit permanently fixed immediately above the transducers. The motion reference unit was a TSS DMS-05 dynamic motion sensor which used solid state sensing elements to measure instantaneous linear accelerations and angular rates of motion change to 0.05°. Differential global positioning system (dGPS) was used alnog with a fluxfate magnetic compass. Survey line spacing was chosen to give a minimum 50% overlap on bathymetric sidescan data, and was further reduced where sea floor change was rapid or of important interest. AGDS was calibrated for depth, E1 and E2 values. Sidescan was roll calibrated. Tidal corrections were applied to both the bathymetric sidescan data and ADGS from 10minute tidal curves modelled using information from Admiralty Tide tables and the Hydrographic Office. |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | Bates, C. R., Moore, C. G., Harries, D. B., Austin, W. and Mair, J. (2004). Broad scale mapping of sublittoral habitats in Loch Laxford, Scotland. Scottish Natural Heritage Commissioned Report No. 004 (ROAME No. F01AA401A). |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | NDGO0005 | |
| Keyword title | data.gov.uk | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat extent | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Macroalgae and seagrass taxonomy-related counts | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sediment grain size parameters | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zoobenthos taxonomic abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zoobenthos taxonomy-related counts | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 58.4667 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.9833 |
| South | The southern-most limit of the data resource in decimal degrees | 58.35 |
| West | The western-most limit of the data resource in decimal degrees | -5.1667 |
| Regional sea | Minches and Western Scotland | |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | NatureScot (HQ Inverness) | |
| data_supply@nature.scot | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Scottish Natural Heritage (SNH), Headquaters | |
| Individual name | Scottish Natural Heritage (SNH) | |
| Position name | Data Manager | |
| Phone | 01463 725000 | |
| data_supply@nature.scot | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | NatureScot (HQ Inverness) | |
| Position name | NatureScot Data Manager | |
| data_supply@nature.scot | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Scottish Natural Heritage (SNH), Headquaters | |
| Individual name | Scottish Natural Heritage (SNH) | |
| Position name | Data Manager | |
| Phone | 01463 725000 | |
| data_supply@nature.scot | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Individual name | Esther Hughes | |
| Position name | Data Manager | |
| Phone | 01752 633102 | |
| dassh.enquiries@mba.ac.uk | ||
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | Not for navigational use; SNH copyright data which is available for re-use under government licence terms: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | no restrictions to public access |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Database (Marine Recorder) |
| Format in which digital data can be provided for transfer | Documents (Published report) | |
| Format in which digital data can be provided for transfer | Image | |
| Format in which digital data can be provided for transfer | Geographic Information System (shapefiles) | |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2003-01-01 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2025-06-10 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |
| Metadata parent | bfbc0bbe648f7dd06ab776cb8f06eaba | |