Description
'DEMNA-DNE : Occurrences of Diatoms (Bacillariophyceae) in running waters of Wallonia, Belgium' is a presence-only occurrence dataset resulting of the biological monitoring of surface water bodies carried out by the hydrobiology unit of the Département d'Etude du Milieu Naturel et Agricole and its partners (SPW-ARNE-DEMNA).
The diatoms monitoring is running since 2005, in order to assess the trends of the biological status of surface water bodies in Wallonia, together with macrohpytes, fishes and macro invertebrates indicators. The current monitoring network is composed of more than 440 sites, distributed among all streams from the hydrographic districts of the Meuse, the Scheldt, the Rhine and the Seine in Wallonia.
The monitoring is ongoing in the context of the EU Water Framework Directive, and thus follows standardised sampling protocols (IPS -Specific Pollution Sensitivity Index, according a methodology derived from the French standard AFNOR XP T90-354).
The data has been cleaned for quality issues prior to GBIF publication and thus is not prefectly comparable to the expertised data basis used for the IPS calculation and biological quality reporting. Please feel free to get in touch for any request or return regarding this dataset or the underlying monitoring work.
Data Records
The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 125,374 records.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
| Version | Published on | Records | Change summary | DOI handle | Last modified by |
|---|---|---|---|---|---|
 1.2 | 2023-11-21 12:42:59 | 125,374 | minor metadata update | Maxime Coupremanne | |
| 1.1 | 2023-11-21 12:04:58 | 125,374 | minor metadata updates - doubtful individual count updated by data collector | Maxime Coupremanne | |
| 1.0 | 2023-11-17 14:06:06 | 125,374 | first publication. Updates more likely to follow | Maxime Coupremanne |
How to cite
Researchers should cite this work as follows:
Msaaf M, DEMNA-DNE hydrobiology unit and collaborators (2023). "DEMNA-DNE : Occurrences of Diatoms (Bacillariophyceae) in running waters of Wallonia, Belgium." Version 1.0. Service Public de Wallonie – Département d’Etude du Milieu Naturel et Agricole (SPW – DEMNA). Occurrence dataset. https://ipt.biodiversity.be/resource?r=demnadiatoms&v=1.0
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Service Public de Wallonie – Département d’Etude du Milieu Naturel et Agricole (SPW – DEMNA). This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: 658e39ee-33ea-40e5-b1d3-b0c0282e20d7. Service Public de Wallonie – Département d’Etude du Milieu Naturel et Agricole (SPW – DEMNA) publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Belgian Biodiversity Platform.
Keywords
Occurrence; diatoms; rivers; biological quality; Wallonia; DEMNA; algae; Observation
Contacts
- Metadata Provider
- Biodiversity expert -biological water quality
- biological water quality controller
- (+32) 81626451
- Originator
- Biodiversity experts
- Metadata Provider
- Biodiversity expert -biological water quality
- Avenue Maréchal Juin 23
- (+32) 81626451
- Publisher
- Data liaison officer
- Avenue Maréchal Juin 23
- +32479865082
https://orcid.org/0000-0002-9052-9500
Geographic Coverage
The sampling network is composed of about 440 sites in Wallonia
| Bounding Coordinates | South West [49.506, 2.94], North East [50.978, 6.341] |
|---|
Taxonomic Coverage
Diatoms
| Kingdom | Chromista (Kelp, Diatoms, And Allies) |
|---|---|
| Class | Bacillariophyceae Dangeard, 1933[1] (diatoms) |
Temporal Coverage
| Start Date / End Date | 2005-06-17 / 2021-11-16 |
|---|
Sampling Methods
The sampling methodology is derived from the french standard (NF T90-354). Sampling is generally carried out on well-lit sections, preferably on submerged stones, pebbles or boulders, so as to present a diatomic population representative of environmental conditions. Biofilm is collected by scraping the substrate surface with a toothbrush or scraper over a total area of at least 100 cm².
| Study Extent | The current monitoring network is composed of more than 440 sampling stations distributed among the Wallonia. The concerned habitats include lentic and lotic brooks, streams, largest rivers and canals from the hydrographic districts of the Meuse, the Scheldt, the Rhine and the Seine. |
|---|---|
| Quality Control | The Department is ISO9001 certified. Some sampling was performed by external contractors, also certified. Data are submitted to a procedural validation by experts during samling, sorting, identification and encoding of records within the AQUABIO database. |
Method step description:
- Choice of surfaces to be sampled
- Diatom film sampling according to NF T90-354 standard
- Recovery of the biofilm in a pillbox with alcohol
- Mounting on microscope coverslips
- Identification and counting
- Import of the samling results into the AQUABIO Database
- Control and validation of content
- Cleaning and DarwinCore transformation of validated data and publication to GBIF
Additional Metadata
| Maintenance Description | the dataset will be updated annually, to incorporate validated field season data. |
|---|---|
| Alternative Identifiers | 658e39ee-33ea-40e5-b1d3-b0c0282e20d7 |
| https://ipt.biodiversity.be/resource?r=demnadiatoms |