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Epibenthic Communities


Metadata
File Identifier: B4204031-D19A-4B50-B39D-FC9C7CFB0A27
Metadata Language: English
: utf8
Resource Type: Service
Responsible Party:
Individual Name: Dr. Hermann Neumann
Organisation Name: Senckenberg am Meer
Role: Point Of Contact
Contact Info:
Delivery Point: Südstrand 40
City: 26382 Wilhelmshaven
Country: DE
E-Mail Address: Hermann.Neumann@senckenberg.de
Responsible Party:
Individual Name: Ulrike Kleeberg
Organisation Name: HZG Helmholtz-Zentrum Geesthacht
Role: Point Of Contact
Contact Info:
City: Max-Planck Str. 1
Administrative Area: 21502 Geesthacht
Country: DE
E-Mail Address: ulrike.kleeberg@hzg.de
Metadata Date: 2018-08-23
Metadata Standard Name: INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119
Metadata Standard Version: V. 1.2
Service Identification
Abstract: Data from nearly 400 stations were compiled for the study.Eight distinct epibenthic communities were found in the south-eastern North Sea by using multivariate analysis. Distribution modelling with eight environmental variables (bottom temperature and salinity, temperature differences between summer and winter, mud content of sediments, maximum bottom shear stress, stratification, water depth and annual primary production) and one human pressure (fishing effort) was used to extrapolate probable spatial distributions and to identify associated habitat characteristics of the communities in the south-eastern North Sea. Three large epibenthic communities “Coast”,“Oyster-ground” and “Tail End”reflect a gradual habitat change from the coast towards offshore regions, expressed in gradients of bottom salinity, seasonal temperature differences and stratification as the dominant environmental factors. Five smaller communities (“Amrum Bank”, “Frisian Front”, “Deeps”,“Dogger Bank” and “Dogger Slope”) outline specific habitats in the south-eastern North Sea. The “Dogger Slope”community has not been recognized before, but has a predicted spatial extent of 7118 km2.
Purpose: Data from nearly 400 stations were compiled for the study. Eight distinct epibenthic communities were found in the south-eastern North Sea by using multivariate analysis.
Thumbnail:
Browse Graphic: https://coastmap.hzg.de/server/rest/directories/thumbs//EpibenthicThumb700.png
Citation:
Title: Epibenthic Communities
Date:
Date: 2018-08-23
Date Type: Publication Date
Identifier: B4204031-D19A-4B50-B39D-FC9C7CFB0A27-DI
Individual Name: Dr. Hermann Neumann
Organisation Name: Senckenberg am Meer
Role: Processor
Contact Info:
Delivery Point: Südstrand 40
City: 26382 Wilhelmshaven
Country: DE
E-Mail Address: hneumann@senckenberg.de
Point Of Contact:
Individual Name: Dr. Hermann Neumann
Organisation Name: Senckenberg am Meer
Role: Processor
Contact Info:
Delivery Point: Südstrand 40
City: 26382 Wilhelmshaven
Country: DE
E-Mail Address: Hermann.Neumann@senckenberg.de
Keyword Collection:
Keyword: NOAH
Keyword: benthicKey6
Keyword: Epifauna
Keyword: Abundance
Keyword: Epibenthic
Keyword: Live Data and Maps
Service Type: ESRI ArcGIS Mapping Service
Extent:
West Bounding Longitude: 2.5
East Bounding Longitude: 8.5
North Bounding Latitude: 57
South Bounding Latitude: 53
Constraints: The definition of community boundaries in the map is based on expert knowledge and the “10 percentile training presence logistic threshold”provided by the MAXENT analyses. Occurrence probability for each community within the coloured area is always higher than 50%. In nature, the transition between communities is rather gradual and lacks conspicuous boundaries. See publication for more information.
Constraints: Not to be used for commercial purposes
Legal Constraints:
Access Constraints: Intellectual Property Rights
Other Constraints: no limitations on public access
Distribution
Distribution Format:
Format Name: ArcGIS Service
Format Version: 10.6
Transfer Options:
URL: http://coastmap.hzg.de/server/rest/services/Epibenthic_Communities/MapServer
Protocol:
Application Profile:
Function: Information
Transfer Options:
URL: http://coastmap.hzg.de/server/services/Epibenthic_Communities/MapServer/WMSServer?
Protocol:
Application Profile:
Function: Information
Quality
Scope: Service
Conformance Result:
Validation Performed: true
Explanation:
Specification:
Title: INSPIRE requirements
Date:
Date: 2018-08-23
Date Type: Publication Date
Lineage: Acquisition and Processing Description: Epibenthic invertebrates were sampled at 398 stations in the south-eastern North Sea. Sampling took place from 2000 to 2015 (except 2001 and 2002) with a standardized 2 m beam trawl fitted with a 20 mm net and a cod end of 4 mm mesh size. In total, 119 species/taxa were used for epibenthic community analysis. Hierarchical cluster analysis (group-average linking) and non-metric multidimensional scaling (nmMDS) were applied on square-root-transformed abundance data to separate groups of stations with similar community structure. For modelling a maximum entropy approach (MAXENT) was used based on eight environmental variables: bottom temperature and salinity, temperature differences between summer and winter, mud content of sediments, maximum bottom shear stress, stratification, depth and annual primary production. In addition, fishing activities by bottom-contacting gears were quantified, representing the most important human pressure on benthic species in the southern North Sea. Fifteen replicate runs were performed for every community and averaged afterwards. The logistic output of the model is a distribution map, which shows the probability of occurrence of epibenthic communities in the south-eastern North Sea ranging from 0 to 100%. The MAXENT analyses provide the “10 percentile training presence logistic threshold”, which was used to define areas where the occurrence of the communities was most likely (the minimum probability of suitable habitat). See publication for more information.
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