DEMNA-DNE : Occurrences of Diatoms (Bacillariophyceae) in running waters of Wallonia, Belgium

Maryse Msaaf1, Hydrobiology Unit and collaborators2, Maryse Msaaf3, Maxime Coupremanne4

1 Départment d'étude du milieu naturel et agricole, biological water quality controller, 5030, Gembloux, Belgium; 2 DEMNA and partners, ; 3 Départment d'étude du milieu naturel et agricole, Avenue Maréchal Juin 23, 5030, Gembloux, Belgium; 4 Belgian Biodiversity Platform - DEMNA, Avenue Maréchal Juin 23, 5030, Gembloux, Belgium

Corresponding author(s): Maryse Msaaf (maryse.msaaf@spw.wallonie.be)Hydrobiology Unit and collaborators, Maryse Msaaf

Received {date}; Revised {date}; Accepted {date}; Published {date}

Citation: Combination of authors, year of data paper publication (in parentheses), Title, Journal Name, Volume, Issue number (in parentheses), and doi of the data paper.

Resource Citation

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&amp;v=1.0

Abstract

'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.

Keywords: Occurrence, diatoms, rivers, biological quality, Wallonia, DEMNA, algae, Observation

Data published through GBIF: https://ipt.biodiversity.be/resource?r=demnadiatoms

Taxonomic coverage

General taxonomic coverage description: Diatoms
Taxonomic ranks
Kingdom: Chromista
Class: Bacillariophyceae Dangeard, 1933[1]
Common names: Kelp, Diatoms, And Allies, diatoms

Spatial coverage

General spatial coverage: The sampling network is composed of about 440 sites in Wallonia
Coordinates: 49°30'21.6''N and 50°58'40.8''N Latitude; 2°56'24''E and 6°20'27.6''E Longitude 

Temporal coverage: June 17, 2005 - November 16, 2021

Methods

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
Study extent description: 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.
Sampling description: 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.
Quality control description: 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.

Datasets

Dataset description
Object name: Darwin Core Archive DEMNA-DNE : Occurrences of Diatoms (Bacillariophyceae) in running waters of Wallonia, Belgium
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: https://ipt.biodiversity.be/archive.do?r=demnadiatoms
Publication date of data: 2023-11-21
Language: English
Licences of use: Creative Commons Attribution (CC-BY 4.0) License

Metadata language: English
Date of metadata creation: 2023-09-29
Hierarchy level: Dataset