What can supraspecies richness tell us?

Biogeographers, ecologists, palaeontologists, and conservation managers often deal with checklists in which not all individuals have been identified to a species level, or the accuracy of species identification is questionable. Is it possible and credible to investigate species richness based on such checklists? Studies on macrofauna in the Far Eastern seas, eastern Arctic seas, and adjacent waters of the Pacific and Arctic Oceans suggest that in different habitats and for diverse taxa, species, and higher taxa richness strongly correlate with each other and increase with an expansion in the study area and sample size according to the species–area law. Such an increase is higher in the bottom zone than in the pelagic. Species and higher taxa richness also show a decrease from lower to higher latitudes, which is in line with the Humboldt–Wallace’s law. According to Willis’ law and self-similarity in the organisation of taxonomic levels, species richness can be assessed based on the genus, family, and order richness. In other words, supraspecies richness itself can tell us the same as species richness and therefore certain global patterns revealed at the species level may also be revealed at the supraspecies level. Such a concordance in general trends among richness parameters at different taxonomic levels in practice implies that species richness can be studied based on lists that lack species identifications or lists with doubtful species identification. We suggest bolder use of supraspecies richness in science and practice, discussing the disadvantages and advantages of this approach.     

‘That Moral League of Nations against the United States’: The Origins of the 1856 Declaration of Paris

The Declaration of Paris, signed by seven European powers on 16 April 1856, is almost forgotten today. Yet it marks the beginning of modern international law as we know it: multilateral treaties open for accession by all powers with the intention of creating new universal rules. Its extension of neutral rights to trade undisturbed in peace-time was a radical reversal of the centuries-old British tradition of extensive belligerent rights. But there is no convincing explanation why Britain signed this treaty and lobbied for its global acceptance. This article shows that the Declaration was a package deal in which Britain accepted broader neutral rights but gained the abolition of privateering. Privateering was no anachronism, but the linchpin of US strategy in case of a conflict with Britain. The Declaration of Paris closed most of the world's ports to privateers and thus ended the practice. The Declaration was also the first multi-lateral law-making treaty and marks the invention of the main instrument we use today to create international law.