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Figure
• The figure shows the number and the ratios of the number of Lusitanian species to the number Boreal species (L:B ratios) observed by year.
• It also shows sea surface temperature (SST) anomalies centred and scaled so that SST series and L:B ratios have the same mean and variance, to aid comparison.
• Data for 1969 are not displayed as the North Sea International Bottom Trawl Survey (NS-IBTS) survey used theHerring Bottom Trawl 180 feet (H18) herring bottom trawl instead of the Grande Ouverture Verticale (GOV) trawl in that year.
Geographical coverage
Marine Strategy Framework Directive (MSFD) sub-regions: Baltic Sea, Bay of Biscay and the Iberian Coast, Celtic Seas, Greater North Sea, and widely distributed
For references, please go to https://www.eea.europa.eu/data-and-maps/figures/temporal-development-in-the-number-2 or scan the QR code.
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