Alternate title

NO300001

Date (Publication)

2006-01-01

Citation identifier

DBFDB54C-2670-44B3-967D-546E5CEF49FB

Presentation form

Digital map

Other citation details

ÔÇó Bekkby T, Rinde E, Erikstad L, Bakkestuen V, Longva O, Christensen O, Is├ªus M, Isachsen PE. 2008. Spatial probability modelling of eelgrass Zostera marina L. distribution on the West coast of Norway. ICES J Mar Sci 65:1093-1101. https://academic.oup.com/icesjms/article/65/7/1093/643728 ÔÇó Bekkby, T., and Is├ªus, M. 2008. Mapping large shallow inlets and bays - modelling a Natura 2000 habitat with digital terrain and wave exposure models. ICES Journal of Marine Science, 65: 238-241. https://academic.oup.com/icesjms/article/65/2/238/736559 ÔÇó Bekkby, T., Erikstad, L., Bakkestuen, V., and Bj├©rge, A. 2002. A landscape ecological approach to coastal zone applications. Sarsia, 87: 396-408. www.tandfonline.com/doi/abs/10.1080/0036482021000155845

Purpose

The model represents the potential distribution of habitat areas of seagrass (eelgrass, Zostera marina) in an area in Nord├©yane, M├©re og Romsdal county, the West coast of Norway. Field data (35 seagrass presences, 560 absences) was collected in 2003. The model was run in 2006 and published in Bekkby et al. (2008). The five predictor variables used were depth, slope, ÔÇ£enclosednessÔÇØ, wave exposure and current speed. The depth model (DTM) was developed at a spatial resolution of 10 m using the linear algorithm of the software Surfer (version 6.1, Bekkby et al., 2002), based on point data and contour intervals purchased from the Norwegian Mapping Authority. Slope was calculated from the DTM using the function available in ArcView 3.3. ÔÇ£EnclosednessÔÇØ (Bekkby and Is├ªus, 2008), i.e. the degree to which an area is situated in an inlet or bay, was modelled at a spatial resolution of 10 m. Wave exposure was modelled, with a spatial resolution of 10 m, as an index using data on fetch (distance to nearest shore, island or coast), averaged wind speed and wind frequency (estimated as the amount of time that the wind came from one of 16 direction). Current speed was estimated by the numerical ocean model ROMS at a 100 m spatial resolution. The model (fivefold cvROC = 0.89) was developed using GAM analysis and AICc model selection, in the statistical program S-PLUS 2000. "Look up tables" and the program Grasp were used to transfer the predictions to ArcView GIS 3.3.

Credit

ÔÇó Bekkby T, Rinde E, Erikstad L, Bakkestuen V, Longva O, Christensen O, Is├ªus M, Isachsen PE. 2008. Spatial probability modelling of eelgrass Zostera marina L. distribution on the West coast of Norway. ICES J Mar Sci 65:1093-1101. https://academic.oup.com/icesjms/article/65/7/1093/643728 ÔÇó Bekkby, T., and Is├ªus, M. 2008. Mapping large shallow inlets and bays - modelling a Natura 2000 habitat with digital terrain and wave exposure models. ICES Journal of Marine Science, 65: 238-241. https://academic.oup.com/icesjms/article/65/2/238/736559 ÔÇó Bekkby, T., Erikstad, L., Bakkestuen, V., and Bj├©rge, A. 2002. A landscape ecological approach to coastal zone applications. Sarsia, 87: 396-408. www.tandfonline.com/doi/abs/10.1080/0036482021000155845

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Norwegian Institute for Water Research (NIVA)	Trine Bekkby	trine.bekkby@niva.no	Point of contact

Theme

• GEMET - INSPIRE themes, version 1.0

Theme

• Uncategorized

Theme

• Marine habitat mapping

Theme

• Habitats and Biotopes

Keywords

• Downloadable Data

Use limitation

The model is not downloadable (only viewer access), but can be inquired via e-mail to trine.bekkby@niva.no.

Access constraints

License

Use constraints

License

Spatial representation type

Grid

Distance

10  m

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

Reference system identifier

EPSG / 4326 / 6.14(3.0.1)

Number of dimensions

2

Dimension name

Column

Dimension size

7117

Resolution

0.000138  deg

Dimension name

Row

Dimension size

2239

Resolution

0.000138  deg

Cell geometry

Area

Transformation parameter availability

Yes

Checkpoint Availability

No

Point in Pixel

• Center

Distribution format

Name	Version
Raster Dataset

Hierarchy level

Dataset

Statement

The model represents the potential distribution of habitat areas of seagrass (eelgrass, Zostera marina) in an area in Nord├©yane, M├©re og Romsdal county, the West coast of Norway. Field data (35 seagrass presences, 560 absences) was collected in 2003. The model was run in 2006 and published in Bekkby et al. (2008). The five predictor variables used were depth, slope, ÔÇ£enclosednessÔÇØ, wave exposure and current speed. The depth model (DTM) was developed at a spatial resolution of 10 m using the linear algorithm of the software Surfer (version 6.1, Bekkby et al., 2002), based on point data and contour intervals purchased from the Norwegian Mapping Authority. Slope was calculated from the DTM using the function available in ArcView 3.3. ÔÇ£EnclosednessÔÇØ (Bekkby and Is├ªus, 2008), i.e. the degree to which an area is situated in an inlet or bay, was modelled at a spatial resolution of 10 m. Wave exposure was modelled, with a spatial resolution of 10 m, as an index using data on fetch (distance to nearest shore, island or coast), averaged wind speed and wind frequency (estimated as the amount of time that the wind came from one of 16 direction). Current speed was estimated by the numerical ocean model ROMS at a 100 m spatial resolution. The model (fivefold cvROC = 0.89) was developed using GAM analysis and AICc model selection, in the statistical program S-PLUS 2000. "Look up tables" and the program Grasp were used to transfer the predictions to ArcView GIS 3.3.

Content type

Image

Descriptor

Band_1

Maximum value

0.42758

Minimum value

0

Bits per value

32

Metadata

File identifier

DBFDB54C-2670-44B3-967D-546E5CEF49FB XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2020-01-15T12:23:05

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
Norwegian Institute for Water Research (NIVA)	Trine Bekkby	trine.bekkby@niva.no	Point of contact