JDS was an initiative by the ICPDR to investigate the whole Danube river both with biological and chemical parameters. Goal: chemical status / biological status assessment; www.icpdr.org
2001:
94 sites along the Danube river incl. some larger tributiaries at confluence
benthic invertebrate data,qualitative sampling
2007:
96 sites
benthic invertebrate data, airlift sampling
More information on this dataset can be found in the Freshwater Metadatabase - BF21 (http://www.freshwatermetadata.eu/metadb/bf_mdb_view.php?entryID=BF21).