During the past two decades, the subantarctic diatom flora has been the subject of several detailed taxonomic revisions, resulting in the description of a large number of new species. During a survey of the freshwater diatom flora of Macquarie Island (southern Pacific Ocean), an unknown Navicula species was observed showing resemblance to Navicula gottlandica. Populations of similar diatoms (previously reported as N. gottlandica) from Tasmania were also investigated. We here present a detailed morphological analysis of these diatoms, and compare it with the type material of N. gottlandica.
Australian and New Zealand scientific research organisations have recently established the first formal collaboration aimed at promoting the safe, efficient and environmentally responsible operation of research ships.Called RVONZA (Research Vessels Of New Zealand and Australia), the group’s inaugural meeting was held in Wellington last month, spearheaded by NIWA’s manager of marine resources, Rob Christie.It was attended by representatives from: National Institute of Water and Atmospheric Research (NIWA), Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Antarctic Division (AAD), Australian Institute of Marine Science (AIMS), Australian Maritime Collage (AMC).Jointly these organisations manage over $1 billion of marine assets and equipment, and carry out scientific research in the Southern Hemisphere, from vessels such as Tangaroa, Kaharoa the Aurora Australis, Investigator, Solander and Cape Ferguson.The group has also agreed to look at the possibility of sharing equipment and vessels and will use their collective expertise to ensure the best practice for design, management and operation of research ships.The meeting comes at a time when the Australian Antarctic Division is building a new AU$500-million icebreaking research ship called Nuyina, and NIWA has begun the process of replacing its mid fleet vessel Kaharoa.“The formation of RVONZA means we can now work together in a much more coordinated way sharing valuable lessons on the vessels design, build and operation or research vessels,” Rob Christie said.