Modelled biomass, production and species richness of benthic invertebrate communities in Welsh coastal waters
Biomas, cynhyrchiant a thoreithrwydd rhywogaethau wedi'u modelu o gymunedau infertebratau benthig yn nyfroedd arfordirol Cymru

  • English
  • wel
  • All

Soft-sediment benthic invertebrate communities in the coastal zone of Wales were modelled using a size-based model. Biomass, production and species richness were modelled as a function of local environmental conditions and bottom trawling disturbance. Countryside Council for Wales (CCW) contributed to a PhD at the School of Ocean Sciences, Bangor University entitled. The socio-economic and ecological implications of inshore fisheries management (project FC 73-02-740). The final part of this PhD includes an evaluation of the economic impacts of different types of fisheries management, including No Take Zones (NTZs) and areas where no fishing with towed gears is permitted. In order to base this economic analysis on realistic scenarios, data was needed concerning the locations which would most benefit from the protection described. The state of the benthic community was modelled using bottom trawl data up to 2003 and therefore represents the state in 2003. Predictions for a situation without trawling are not time specific. Values represent a yearly average. The model that was used was validated for the North Sea and explained 39% of the observed variation there. No data was available for validation of model predictions in the Irish Sea.

Identification

Dynodydd
Identifier
NRW_DS110042
Teitl Amgen
Alternative Title
  • Modelling the state of soft-sediment benthic communities in Welsh coastal waters
Laith Metadata
Metadata Language
English
Lineage

A size-based model of the response of soft-sediment benthic communities to trawling disturbance was used to predict the recovery time of these communities after trawling was used. The model contained 32 state variables, in two faunal groups (soft and hard bodied macrofauna). Growth of the population biomass in each body mass - organism type compartment was modelled by modifying Lotka-Volterra competition equations to give the population biomass flux for a compartment. The interaction between habitat type and trawling effects was modelled by including relationships between growth and mortality and the environment in the model. We included the effect of sediment type on trawling mortality, the effect of bed shear stress on population growth rate, the effects of chlorophyll a content of the sediment on carrying capacity and the effects of sediment erosion on mortality. Recovery in the model can only take place through growth of the local populations, as the model assumes that there is no migration between adjacent areas.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2006-03-31

Temporal Extent

Begin date
1998-01-01
End date
2004-12-31
 
Categori pwnc
Topic category
  • Environment
    Environment
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Hiddink -
School of Ocean Sciences, University of Wales, Bangor, Menai Bridge, Anglesey, LL59 5AB
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ( )

    Specification

    [A] Published summary report - Paper and electronic version (PDF & MS Word) [B] Map of distribution of biomass, production and species richness of benthic invertebrate communities, with and without trawling [C] Paper maps in report and digital polygon data (Arcview 3 shapefile)

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

A size-based model of the response of soft-sediment benthic communities to trawling disturbance was used to predict the recovery time of these communities after trawling was used. The model contained 32 state variables, in two faunal groups (soft and hard bodied macrofauna). Growth of the population biomass in each body mass - organism type compartment was modelled by modifying Lotka-Volterra competition equations to give the population biomass flux for a compartment. The interaction between habitat type and trawling effects was modelled by including relationships between growth and mortality and the environment in the model. We included the effect of sediment type on trawling mortality, the effect of bed shear stress on population growth rate, the effects of chlorophyll a content of the sediment on carrying capacity and the effects of sediment erosion on mortality. Recovery in the model can only take place through growth of the local populations, as the model assumes that there is no migration between adjacent areas.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • production
  • marine and freshwater inventory
  • Irish Sea
  • Biomass
  • benthic communities
  • bottom trawling
  • benthic species
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
NONE
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Modelling the state of soft-sediment benthic communities in Welsh coastal waters
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW 1999. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313130303432 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-09-28T11:51:27.607Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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