European colonisation of Southeast Asia tightening Turkish control and eventual shut down of the Eastern Mediterranean gateways into Asia first prompted Portuguese, and later Spanish and Dutch sea voyagers to ship around Africa in search of new trading routes and business opportunities. Niccolò de' Conti arrived in Southeast Asia as the earliest documented European in the early 15th century. By 1498 Vasco da Gama, who had sailed round the Cape of Good Hope, established the first direct sea route from Europe to India. Central among the various plannings was to establish direct and permanent trade of the highly priced spices, that were native to Southeast
North Sea sea grass used to coat huge tracts of ocean floor, but have been damaged by trawling and dredging have diminished its habitat and prevented its return. Invasive Japanese seaweed has spread along the shores of the sea clogging harbours and inlets and has become a nuisance. Due to the heavy human populations and high level of industrialization along its shores, the wildlife of the North Sea has suffered from pollution, overhunting, and overfishing. Flamingos and pelicans were once found along the southern shores of the North Sea, but became extinct over the 2nd millennium. Walruses frequented the Orkney Islands through