Lennert TYBERGHEIN : “EModnet regional gridded abundance products : from multi-source data to ecosystem assessment support”

lundi 12 octobre 2015
par  Romain DAVID

Lennert Tyberghein1, Olivier Beauchard2, Peter Herman2, Sylvain Watelet3, Jean-Marie Beckers3, Francisco Hernandez1 and Simon Claus1

1 Flanders Marine Institute (VLIZ), Innovocean Site, Wandelaarkaai 7, B-8400 Oostende, Belgium ; Email : lennert.tyberghein@vliz.be
2 Royal Netherlands Institute for Sea Research, Korringaweg 7, 4401 NT Yerseke, Netherlands
3 GeoHydrodynamics and Environment Research, University of Liège, Sart Tilman B5a, 4000, Liège, Belgium

The European Marine Observation and Data Network (EMODnet) is a network of organisations supported by the EU’s integrated maritime policy. These organisations work together to assemble marine data, products and metadata to make these fragmented resources more available to public and private users relying on quality-assured, standardised and harmonised marine data which are interoperable and free of restrictions on use. Within EMODnet Biology, a set of gridded map layers is being produced showing the average abundance of several species per species group for different time windows (seasonal, annual or multi-annual as appropriate). For this purpose we use a the modeling tool DIVA (Data-Interpolating Variational Analysis). DIVA allows the spatial interpolation of in situ data in an optimal way, comparable to optimal interpolation in order to create high quality statistically optimised gridded maps.
Initial products were developed for well-known and published taxa. This selection was based on the data-availability within the EurOBIS database, reference to existing literature and relevance for the project. Resulting data products are currently accessible for more than 40 species from North Sea, Baltic Sea, Mediterranean Sea and North East Atlantic representing benthos, zoo – and phytoplankton, birds, fish and mammal species.
In a second phase we are working towards a more automated way of data selection and preparation. The data collected within the framework of EurOBIS are currently subjected to a more thorough process of quality control. Records are checked on data format, completeness and validity of information, taxonomic quality, geographic correctness and more. This quality controlled database is automatically screened for datasets which contain abundance data within regional areas of interest that can be used for EMODnet gridded product development. This selection enables us to select and model species across different datasets and sources. In this way we create a way for semi-automatic gridding of biological abundance data. As a final step, the products are published and made accessible via OGC webservices.


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