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Metadata: 1998-2000 Stour and Orwell Estuaries Unicomarine Limited macrobenthos survey
Abstract:
Marine benthic species abundance data from ecological survey of the Stour and Orwell estuaries. Trial placements of dredged fine sediment were undertaken, during the winter of 1998-1999 and 1999-2000, at several sites in the Stour estuary. Unicomarine Ltd carried out three macrobenthos surveys to assess the impact of sediment replenishment on fauna. The first survey was carried out in October 1998, stations were sampled round the placement site with additional reference stations further away from the placement site (39 stations in total). The survey was repeated in April 1999, after placement of sediment over the winter of 1998-1999, and again in May 2000 after a second placement of sediment. During the 2000 survey 43 stations were sampled including three additional reference stations towards the banks. In 1999 there was an increase in coarse material, compared with 1998, and some species associated with stones were more common. In 2000 the sediment data indicated that production of coarse sediment was similar to 1998 but the amount of silt/clay material had increased slightly, as would be expected from the fine sediments deposited in the area. The dominant community groups, biotopes and taxa found were similar for all surveys and there was little change in total numbers of taxa and individuals between years. Two major community groups were discernible in all years. Minor changes in community structure could be traced from year to year and related to fluctuating populations of dominant taxa. The reasons for the small changes could not be confidently identified. Some were clearly the result of changes in the sediment regime but it is not clear whether those changes may have been a result of sediment placement or of natural fluctuations.
Data holder:
Data Archive for Seabed Species and Habitats (DASSH)
Click on the red button for resource contact details:
- Click on the red button for resource contact details
Use constraints:
Released under DASSH terms and conditions https://www.dassh.ac.uk/terms-and-conditions
| Other details | ||
| Internal code | Internally assigned metadata identifier | 2905 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 1998-2000 Stour and Orwell Estuaries Unicomarine Limited macrobenthos survey |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | c297d901c896065253182035a3c77aa4 |
| Resource Identifier | This is the code assigned by the data owner. | DASSH-554 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 1998-01-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2000-12-31 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Marine benthic species abundance data from ecological survey of the Stour and Orwell estuaries. Trial placements of dredged fine sediment were undertaken, during the winter of 1998-1999 and 1999-2000, at several sites in the Stour estuary. Unicomarine Ltd carried out three macrobenthos surveys to assess the impact of sediment replenishment on fauna. The first survey was carried out in October 1998, stations were sampled round the placement site with additional reference stations further away from the placement site (39 stations in total). The survey was repeated in April 1999, after placement of sediment over the winter of 1998-1999, and again in May 2000 after a second placement of sediment. During the 2000 survey 43 stations were sampled including three additional reference stations towards the banks. In 1999 there was an increase in coarse material, compared with 1998, and some species associated with stones were more common. In 2000 the sediment data indicated that production of coarse sediment was similar to 1998 but the amount of silt/clay material had increased slightly, as would be expected from the fine sediments deposited in the area. The dominant community groups, biotopes and taxa found were similar for all surveys and there was little change in total numbers of taxa and individuals between years. Two major community groups were discernible in all years. Minor changes in community structure could be traced from year to year and related to fluctuating populations of dominant taxa. The reasons for the small changes could not be confidently identified. Some were clearly the result of changes in the sediment regime but it is not clear whether those changes may have been a result of sediment placement or of natural fluctuations. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Trial placements of dredged fine sediment were undertaken, during the winter of 1998-1999 and 1999-2000, at several sites in the Stour estuary. Unicomarine Ltd carried out three macrobenthos surveys to assess the impact of sediment replenishment on fauna. Three 0.04m2 Shipek grab samples were taken at each station, two for benthic analysis and one for partical size analysis. Biological samples were sieved through a 0.5mm sieve. The first survey was carried out in October 1998. Stations were sampled round the placement site with additional reference stations further away from the placement site (39 stations in total). The survey was repeated in April 1999, after placement of sediment over the winter of 1998-1999, and again in May 2000 after a second placement of sediment. During the 2000 survey 43 stations were sampled including three additional reference stations towards the banks. In 1999 there was an increase in coarse material, compared with 1998, and some species associated with stones were more common. In 2000 the sediment data indicated that production of coarse sediment was similar to 1998 but the amount of silt/clay material had increased slightly, as would be expected from the fine sediments deposited in the area. The dominant community groups, biotopes and taxa found were simmilar for all surveys and there was little change in total numbers of taxa and individuals between years. Two major community groups were discernible in all years. Minor changes in community structure could be traced from year to year and related to fluctuating populations of dominant taxa. The reasons for the small changes could not be confidently identified. Some were clearly the result of changes in the sediment regime but it is not clear whether those changes may have been a result of sediment placement or of natural fluctuations. |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | Dyer, M.F, 2000. Stour estuary. Benthic survey of sediment placement sites. Results of pre and post placement benthic sampling in 1998 and 1999. Report to Harwich Haven Authority. Unicomarine report, Str_pl-Jan00; Dyer, M.F. and Worsfold, T.M. 2001. Stour estuary. Benthic survey of sediment placement sites. Results of pre and post placement benthic sampling in 1998, 1999 and 2000. Report to Harwich Haven Authority. Unicomarine report, StrPl98990 |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geology | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zoobenthos generic abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fauna abundance per unit area of the bed | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Shellfish abundance and biomass in water bodies | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sediment grain size parameters | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52.0913 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.4282 |
| South | The southern-most limit of the data resource in decimal degrees | 51.8765 |
| West | The western-most limit of the data resource in decimal degrees | 0.997 |
| Regional sea | Southern North Sea | |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Individual name | Becky Seeley | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Individual name | Dan Lear | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Individual name | M. F. Dyer | |
| Position name | Unicomarine | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Individual name | Becky Seeley | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| dassh.enquiries@mba.ac.uk | ||
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | Released under DASSH terms and conditions https://www.dassh.ac.uk/terms-and-conditions |
| 21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Released under DASSH terms and conditions |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2000-12-31 |
| Date of last revision | The most recent date that the resource was revised. | 2000-12-31 |
| Date of creation | The date that the resource was created. | 1998-01-01 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2019-08-09 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery metadata standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |