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

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

Research
Credit

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
Organisation name Individual name Electronic mail address Role

IFREMER

DYNECO

sismer@ifremer.fr

Resource provider

Ifremer

Touria Bajjouk

Touria.Bajjouk@ifremer.fr

Point of contact
Theme

  • /Biological Environment/Habitats

  • Uncategorized

  • GEMET - INSPIRE themes, version 1.0

  • Marine habitat mapping

GEMET - INSPIRE themes, version 1.0

  • Habitats and biotopes
Keywords

  • Downloadable Data
Use limitation

Creative Commons license to apply : Attribution + Non Commercial + No Derivs (BY-NC-ND) : http://creativecommons.org/licenses/?lang=en

Use limitation

Viewable, not downloadable
Access constraints
License
Use constraints
License
Other constraints

unrestricted
Spatial representation type
Grid
Distance
5  meter
Language
English
Character set
UTF8
Topic category
  • Environment
Environment description

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.5.1.7333
N
S
E
W
thumbnail




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
  • Center
Distribution format
Name Version

Raster Dataset
OnLine resource
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&center=-4.900,48.400&layerIds=984&baseLayerId=-3&activeFilters=

EMODnet Seabed Habitats interactive map
OnLine resource
Protocol Linkage Name

OGC:WMS

 		http://www.ifremer.fr/services/wms/biologie

IFR_MOLENE_BIOMASSE_MINMEDMAX_LH
OnLine resource
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
Protocol Linkage Name

OGC:WMS

 		http://www.ifremer.fr/services/wms/biologie

IFR_MOLENE_BIOMASSE_MINMEDMAX_LD
OnLine resource
Protocol Linkage Name

OGC:WMS

 		http://www.ifremer.fr/services/wms/biologie

IFR_MOLENE_PRESENCE_ABSENCE_LD
Hierarchy level
Dataset

Conformance result

Title

R├êGLEMENT (UE) N o 1089/2010 DE LA COMMISSION du 23 novembre 2010 portant modalit├®s d'application de la directive 2007/2/CE du Parlement europ├®en et du Conseil en ce qui concerne l'interop├®rabilit├® des s├®ries et des services de donn├®es g├®ographiques

Date (Publication)
2010-12-08
Explanation

See the referenced specification
Pass
No
Statement

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

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

dataset
Date stamp
2020-01-15T11:03:37Z
Metadata standard name

INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119
Metadata standard version

V. 1.2
Metadata author
Organisation name Individual name Electronic mail address Role

Ifremer

Touria Bajjouk

Touria.Bajjouk@ifremer.fr

Point of contact
 
 

Overviews

overview

Spatial extent

thumbnail

Keywords

/Biological Environment/Habitats GEMET - INSPIRE themes, version 1.0 Marine habitat mapping Uncategorized
GEMET - INSPIRE themes, version 1.0

Habitats and biotopes


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