A cryptic invader of the genus Persicaria has recently increased in damper, northern parts La Palma and Gran Canaria Canary Islands (Spain) locally behaves as an invasive species. Examination historical herbarium specimens showed this species to be present since 1960s same probably applies Palma. Up now, had been assigned Old World weed P. maculosa. However, morphologically, these plants clearl...

In one proposed use of digital watermarks, the owner of a document D sells slightly diierent documents, D 1 ; D 2 ; : : : to each buyer; if a buyer posts his/her document D i to the web, the owner can identify the source of the leak. More general attacks are however possible in which k buyers create some composite document D ; the goal of the owner is to identify at least one of the conspirator...

Abstract Oceanic islands have long been considered engines of differentiation and speciation for terrestrial organisms. Here we investigated colonisation radiation processes in the Madeira Archipelago Canary Islands Andrena wollastoni group bees (subgenus Micrandrena ), which comprises six endemic species five subspecies on islands. Mitochondrial COI sequences support monophyly four two suggest...

The interaction between climate change and biological invasions is a global conservation challenge with major consequences for invasive species management. However, our understanding of this has substantial knowledge gaps; particularly relevant snakes on islands because they can be serious threat to island ecosystems. Here we evaluated the potential influence distribution islands, using invasio...