Ecosystem service mapping in the Severn Estuary and inner Bristol Channel


The Severn Estuary and Bristol Channel provide a diverse range of benefits that underpin our economy and wellbeing, from fisheries to ports and shipping to recreation and cultural heritage. These benefits stem from ecosystem services that rely on the continued maintenance of the environment, making it important that we identify key areas in order to support marine planning.

This project, conducted in partnership between Plymouth Marine Laboratory and the RSPB, explored methods for the assessment and mapping of five key ecosystem services within the Severn estuary and Bristol Channel.

The project reports and maps (including ARC GIS shapefiles) are provided below:

Impact


Download the full report from this project

Download the non-technical summary from this project


Mapped results: Supply levels of key ecosystem service benefits

The five key ecosystem services were (click to scroll to the maps for each service):

  1. Ports and shipping

  2. Carbon storage

  3. Flood risk management

  4. Wild food and fish, including migratory fish

  5. Archaeological resource (cultural service)


Using the files

ARC GIS shapefiles and KMZ files can be downloaded through the link beside each map.

If you choose to download the shapefiles they will appear with uniform colours in each planning cell (hexagon). Suggested symbology, as appears in the images below can be achieved (in ARC GIS 10 or later versions) through selecting: > properties > symbology > quantities > graduated colours > click on the ‘value’ tab in the ‘fields’ box and select ‘Supply_lev’ from the drop down list > select the desired colour ramp, eg. green to yellow to orange to red > select ‘classes’ as 6 > right click on the associated colour box for the ‘0’ supply level in the Arc Map index of layers (representing ‘no data’) and select no colour.
 

Extra Downloads

Symbology (for ArcGIS users)

How to install style/colour scheme (readme)

Click here to view a metadata record from MEDIN (Marine Environmental Data & Information Network) which gives a lineage record.

The MEDIN logo





1. Ports and Shipping

Ports and shipping data
Shipping traffic intensity reproduced from MMO marine planning portal data, shipping intensity values (vessels per year) applicable to the supply levels 1 (lowest) to 5 (highest) are given in the following table.
Download ARC GIS shapefile

Download KMZ file
Shipping traffic
Data confidence for shipping traffic assessment
 
Goods handled map

Tonnage of goods handled annually (both imports and exports) in major ports, tonnage ranges applicable to the supply levels 1 (lowest) to 5 (highest) are given in the following table.
Download ARC GIS shapefile

Download KMZ file


2. Carbon storage

Carbon storage map
Carbon storage supply levels based on detailed habitat type (substratum and species) using supply level categories designated by Potts et al., (2013, 2013a) and Jacobs et al., (2013), displayed in the table.
Download ARC GIS shapefile

Download KMZ file
Data confidence map - carbon storage
Data confidence levels (predicted habitat only =1, substratum only provided by surveys =2, substratum and species provided by surveys =3).
 


3. Flood risk management

In respect to methods provided by Jacobs et al., (2013, TIDE project) ‘flood risk management’ was separated into 4 categories reliant on environmental and habitat specific properties: (1) flood water storage, (2) water current reduction, (3) wave reduction, (4) river water drainage. 
 
Flood water storage
Flood water storage map
Habitat supply levels for the environmental benefit from flood water storage, habitats associated with supply levels are given in the following table (levels 4 and 5 are not present as only 3 criteria were used).

 
Download ARC GIS shapefile

Download KMZ file
Water current reduction
Water current reduction
Habitat supply levels for provision of the benefit of water current reduction, habitats associated with supply levels are given in the following table (level 5 is not present as only 4 criteria were used).

 
Download ARC GIS shapefile

Download KMZ file
Wave reduction
Wave reduction map
Habitat supply levels for the environmental benefit from wave reduction, habitats associated with supply levels are given in the following table (levels 4 and 5 are not present as only 3 criteria were used).

 
Download ARC GIS shapefile

Download KMZ file
Flood water drainage
Flood water drainage map
Habitat supply levels for the environmental benefit from drainage of river water dependent upon bathymetry, bathymetry related to supply levels is provided in the following table (levels 4 and 5 are not present as only 3 criteria were used).

 
Download ARC GIS shapefile

Download KMZ file
Data confidence levels for habitat data
Data confidence levels for habitat data relating to flood risk management (1= lowest confidence, 3 = highest confidence)


4. Wild food, fish and migratory fish

Wild food and fisheries; habitat supply levels
Wild food fisheries; habitat supply levelsHabitat related benefit supply levels for fisheries and wild food, benefit levels extend between 1 – 5, with level 5 the highest, habitats related to supply levels are provided in the following table.
Download ARC GIS shapefile

Download KMZ file
Habitat data ES supply assessment
Habitat data utilised in ES supply assessment for fisheries and wild food.
   
Migratory salmon
Migratory salmon
Juvenile (year one) salmon benefit supply level for tributary rivers, data from monitoring surveys (mean no. salmon, per survey effort values) associated with each supply level are provided in the following table.

 
Download ARC GIS shapefile

Download KMZ file
 


5. Archaeological resource

The archaeological resource, indicated by historic environment records for the study region is extensive, incorporating cultural links from prehistoric to modern, twentieth century history. To express this, (1) the number of regional historic environmental records were mapped, (2) a case study of Mesolithic to Bronze Age finds in the outer Severn estuary was produced and (3) the relationships of habitat types to the provision of the archaeological resource were estimated and mapped.
 
All regional historic environment records
All regional historic environment records
Total number of archaeological sites from pre-historic to modern periods recorded for the inner Bristol Channel and Severn estuary region (records taken from Historic Environment Records and EH PastScape data).
 
Mesolithic to Bronze Age case study: outer Severn estuary
Mesolithic map
Mesolithic to Bronze Age sites identified within the outer Severn estuary by Bell et al., (2010), and Chadwick et al., (2013). Confidence levels in data resources are provided in the following map. 

 
Download ARC GIS shapefile

Download KMZ file
Mesolithic data confidence
Level of confidence in detail of data supporting supply level of archaeological finds (0=no data, 1=low confidence, limited to reports and popular literature, 2=moderate confidence, some reports and grey literature, 3=high confidence, in field surveys and published literature retrieved).

 
 
Estimated association of habitat types to the provision of the archaeological resource
Archaeological benefit map
Map of archaeological benefit supply scores based on habitat type, estimated relationships of habitat to supply levels are provided in the following table.
Download ARC GIS shapefile

Download KMZ file

 

This project has been completed


Key information

Funder: NERC Renewable Energy Knowledge Exchange Programme

Project start date: April 2014

Project end date: March 2015



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Contact

Dr Tara Hooper
Environmental Economist