next
previous
items

Figure

Temporal development in the number of species of each biogeographical affinity group (top) and of the ratio between Lusitanian and Boreal species with sea surface temperature by marine region (bottom)

Figure Created 01 Aug 2022 Published 05 Aug 2022 Last modified 05 Aug 2022
3 min read
The charts show: - Top figures: the temporal development in the number of species of each biogeographical affinity group (Atlantic, Boreal, Lusitania and Unknown) by marine region (Greater North Sea, Baltic Sea, Celtic Seas and Bay of Biscay and Iberian Coast). - Bottom figures: the temporal development of the ratio between Lusitanian and Boreal species and sea surface temperature by marine region to investigate correlations.

European data

Metadata

Additional information

• 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 shown as the NS-IBTS survey used the H18 herring bottom trawl instead of the 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.

Permalinks

Geographic coverage

Temporal coverage

Document Actions