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Metadata: Abundance of microlitter (including microplastics) in riverine samples (sediment, surface waters and biota) at selected locations across the Orange-Senqu River basin and associated land use data 2021
Abstract:
Abundance data of microlitter (including microplastics) in riverine samples (sediment, surface waters and biota) were collected at selected locations across the Orange-Senqu River basin and associated land use in 2021. The file entitled 'List microlitter biota' presents the abundance of microplastics in riverine biota at selected locations across the Orange-Senqu River basin. The file entitled 'List microlitter sediment' presents the abundance of microplastics in riverine sediments at selected locations across the Orange-Senqu River basin. The file entitled 'List microlitter surface waters' presents the abundance of microplastics in riverine surface waters at selected locations across the Orange-Senqu River basin. The file entitled 'LU' summarises the local watershed traits including population density, land use, rainfall and flows.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 10487 |
| 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. | Abundance of microlitter (including microplastics) in riverine samples (sediment, surface waters and biota) at selected locations across the Orange-Senqu River basin and associated land use data 2021 |
| 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. | CEFASad9d2021-7281-44e5-80db-369ac15f2c61 |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS22014 |
| 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 | 2021-10-04 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2021-10-15 |
| 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. | Abundance data of microlitter (including microplastics) in riverine samples (sediment, surface waters and biota) were collected at selected locations across the Orange-Senqu River basin and associated land use in 2021. The file entitled 'List microlitter biota' presents the abundance of microplastics in riverine biota at selected locations across the Orange-Senqu River basin. The file entitled 'List microlitter sediment' presents the abundance of microplastics in riverine sediments at selected locations across the Orange-Senqu River basin. The file entitled 'List microlitter surface waters' presents the abundance of microplastics in riverine surface waters at selected locations across the Orange-Senqu River basin. The file entitled 'LU' summarises the local watershed traits including population density, land use, rainfall and flows. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The riverine sediment samples were analysed using a LUMOS II Fourier transform infrared spectroscopy (FTIR) microscope with focal plane array (FPA) detector (Bruker, UK) at the Cefas microplastics laboratory. Dried sediments were digested using the dropwise addition of filtered (0.2 µm) H2O2 (30%). Following digestion, density separation used a 1.5 g.mL-1 solution of ZnCl2 . Centrifugated supernatant was transferred to a previously cleaned filtration unit and filtered using a 25 mm diameter 0.2 µm porosity Whatman Anodisc (VWR, UK). Each filter was then carefully transferred to previously cleaned glass petri dish and transported to a drying cabinet for drying under 50 °C prior to analysis using a LUMOS II micro-FTIR with FPA detector (Bruker, UK). FTIR spectra were collected using FPA detector in transmission mode using a single scan in the range 4000-1300 cm-1 at a resolution of 8 cm-1 using a 4x4 binning (limit of detection [LOD] ~20 µm). Spectra were converted using a macro in Bruker OPUS (version 8.5) and particle identification was carried out using the siMPle software developed by Aalborg University (Denmark). The riverine water samples were vacuum filtered and stained with Nile Red solution for 30 minutes. Visual examination of filters under a Leica MZ10F with GXCAM-U3PRO-20 camera attachment microscope using both blue and white light was conducted. A subset of suspected microlitter was identified for confirmation and polymer identification using a LUMOS II micro-FTIR. The riverine biota samples were chemically digested using a 30% KOH:NaClO v:v solution. Beakers were sonicated for 5 minutes (VWR ultrasonic cleaner, T2020SX26782) and placed in an incubator shaker (VWR incubating mini shaker, 980151UK) at 40 °C, 50 rpm for three days. On the fourth day, 40 mL of degreaser (Elbow Grease all-purpose degreaser) was added to each beaker and incubated for a further 24 hours. Following digestion, filtration, visual examination, and FTIR analysis of digested fish was completed in the same manner as surface water samples. Each item was imaged in GXCapture-T software (version x64, 4.10.16968.20200415). The second file (LU) containing the most recent land cover data (updated in 2020) for South Africa were extracted from the Department of Forestry, Fisheries, and the Environment (DFFE) open source South African National Land Cover database ( `https://egis.environment.gov.za/sanationallandcoverdatasets`_). The database has 73 land cover classes which were reclassified using the ‘reclass’ tool in ArcGIS into six land use types: agriculture, industrial, natural and plantation, semi-urban, urban, and waterbody .. `https://egis.environment.gov.za/sanationallandcover_datasets`: https://egis.environment.gov.za/sanationallandcoverdatasets |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Freshwater ecosystem | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Freshwater monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Freshwater pollution | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Human impacts | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Laboratory experiment | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Micro-litter in sediments | |
| 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 | Unknown | |
| 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 | data.gov.uk | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | -20 |
| East | The eastern-most limit of the data resource in decimal degrees | 30 |
| South | The southern-most limit of the data resource in decimal degrees | -40 |
| West | The western-most limit of the data resource in decimal degrees | 10 |
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
| defra.helpline@defra.gov.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/22014 |
| Locator name | Name of the web resource | Cefas Data Portal |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | noLimitations | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_RestrictionCode | |
| 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. | 2024-08-23 |
| Date of last revision | The most recent date that the resource was revised. | 2025-04-11 |
| Date of creation | The date that the resource was created. | 2024-08-22 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2025-04-11 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.1 |