Laminaria hyperborea distribution in Molene archipelagos, France
A habitat distribution modelling approach was used to model the spatial distribution of the two main species of kelp forests along Mol├¿ne archipelagos (France). Lineage: Data represents percentage cover of kelp forest as well as biomass of the 2 main species: L. digitata and L. hyperoborea. The used approach consists in firstly establishing surveys and appropriate processing methods in order to provide a detailed underwater topography of the area and to accurately delineate hard substrates (bedrock) potentially colonized by kelp. Secondly, a habitat suitability model is fitted for each species on some carefully selected field stations, measuring kelp presence/absence and biomass. Predictive maps are produced, based on hard substrate areas previously delineated. Type of occurrence data used: In situ data were acquired in the period from late summer to early autumn. Information on the presence/absence of Laminaria species was acquired by towing a high definition video. Species-specific biomass were sampled at low tide for the intertidal areas and by Scuba diving for the sub-tidal areas. Environmental covariates/explanatory variables: PresenceÔÇôabsence of L. digitata distribution was best determined through the combined effects of depth, sediment proximity along current direction, benthic position index (BPI), immersion rate and winter temperature. The sub-model for biomass of L. digitata where present, was predicted using the additional contribution of several variables, with light being the most important (55.62% of deviance explained) and its interactions withwave exposure and spring temperature. Total suspended matter contributed little and only then through the interaction with light. The best model that explained 78.89% of deviance for the presence of L. hyperborea included depth, winter temperature, sediment proximity along current direction and BPI Biomass where L. hyperborea was present was mainly modeled by the same predictors as presence/absence Algorithm/modelling approach: Kelp biological response (presence/absence or biomass) was estimated using Generalized Additive Models (GAM)
Simple
- Alternate title
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FR300002
- Date (Publication)
- 2015-01-01
- Citation identifier
- IFR_MOLENE_BIOMASSE_MINMEDMAX_PRESENCE_ABSENCE
- Citation identifier
- DOI:10.12770/4adbe32a-8c81-4c18-8da3-4c361889820c
- Citation identifier
- A55DC9D2-821E-4B38-BB0F-CABF867B787F
- Presentation form
- Digital map
- Purpose
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Research
- Credit
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Bajjouk T., Rochette S., Laurans M. Ehrhold A., Hamdi A. and Le Niliot Ph. (2015). Multi-approach mapping to help spatial planning and management of the kelp species L. digitata and L. hyperborea: Case study of the Molène Archipelago, Brittany. Journal of Sea Research. 100:2-21
- Point of contact
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Organisation name Individual name Electronic mail address Role IFREMER
DYNECO
Resource provider Ifremer
Touria Bajjouk
Point of contact
- Theme
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/Biological Environment/Habitats
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Uncategorized
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GEMET - INSPIRE themes, version 1.0
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Marine habitat mapping
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GEMET - INSPIRE themes, version 1.0
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Habitats and biotopes
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- Keywords
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Downloadable Data
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- Use limitation
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Creative Commons license to apply : Attribution + Non Commercial + No Derivs (BY-NC-ND) : http://creativecommons.org/licenses/?lang=en
- Use limitation
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Viewable, not downloadable
- Access constraints
- License
- Use constraints
- License
- Other constraints
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unrestricted
- Spatial representation type
- Grid
- Distance
- 5 meter
- Language
- English
- Character set
- UTF8
- Topic category
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- Environment
- Environment description
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Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.5.1.7333
- Reference system identifier
- EPSG / WGS 84 (EPSG:4326) / 6.14(3.0.1)
- Number of dimensions
- 2
- Dimension name
- Column
- Dimension size
- 5011
- Dimension name
- Column
- Dimension size
- 3044
- Cell geometry
- Area
- Transformation parameter availability
- Yes
- Number of dimensions
- 2
- Dimension name
- Column
- Dimension size
- 4974
- Resolution
- 0.000061 deg
- Dimension name
- Row
- Dimension size
- 2913
- Resolution
- 0.000061 deg
- Cell geometry
- Area
- Transformation parameter availability
- Yes
- Checkpoint Availability
- No
Center point
- Point in Pixel
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- Center
- Distribution format
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Name Version Raster Dataset
- OnLine resource
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Protocol Linkage Name OGC:WMS
http://www.ifremer.fr/services/wms/biologie IFR_MOLENE_PRESENCE_ABSENCE_LH
WWW:LINK-1.0-http--link
https://www.emodnet-seabedhabitats.eu/access-data/launch-map-viewer/?LAYERS=EUSM2016&Y=39&X=-8.525390623910205&zoom=10¢er=-4.900,48.400&layerIds=984&baseLayerId=-3&activeFilters= EMODnet Seabed Habitats interactive map
- OnLine resource
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Protocol Linkage Name OGC:WMS
http://www.ifremer.fr/services/wms/biologie IFR_MOLENE_BIOMASSE_MINMEDMAX_LH
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--metadata-URL
http://dx.doi.org/10.12770/4adbe32a-8c81-4c18-8da3-4c361889820c DOI du jeu de donn├®e
- OnLine resource
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Protocol Linkage Name OGC:WMS
http://www.ifremer.fr/services/wms/biologie IFR_MOLENE_BIOMASSE_MINMEDMAX_LD
- OnLine resource
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Protocol Linkage Name OGC:WMS
http://www.ifremer.fr/services/wms/biologie IFR_MOLENE_PRESENCE_ABSENCE_LD
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Explanation
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See the referenced specification
- Pass
- No
- Statement
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Data represents percentage cover of kelp forest as well as biomass of the 2 main species: L. digitata and L. hyperoborea. The used approach consists in firstly establishing surveys and appropriate processing methods in order to provide a detailed underwater topography of the area and to accurately delineate hard substrates (bedrock) potentially colonized by kelp. Secondly, a habitat suitability model is fitted for each species on some carefully selected field stations, measuring kelp presence/absence and biomass. Predictive maps are produced, based on hard substrate areas previously delineated.
Pixel value 2: Any pixel with a probability of presence greater than 95% is considered as zone of presence.
Pixel value -2: Any pixel with a probability of presence lower than 5% is considered as zone of absence.
Pixel value 1: Any pixel with a probability of presence between 50% and 95% is considered as zone of presence but with a possibility that there are zones of absence.
Pixel value -1: Any pixel with a probability of presence between 5% and 50% is considered as zone of absence but with a possibility that there are zones of presence.
- Content type
- Image
- Descriptor
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Band_1
- Maximum value
- 2
- Minimum value
- -2
- Bits per value
- 32
Metadata
- File identifier
- A55DC9D2-821E-4B38-BB0F-CABF867B787F XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2020-01-15T11:03:37Z
- Metadata standard name
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INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119
- Metadata standard version
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V. 1.2
- Metadata author
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Organisation name Individual name Electronic mail address Role Ifremer
Touria Bajjouk
Point of contact