The present book is an updated version of Phytoplankton of Norwegian Coastal Waters (2007) with taxonomical changes based on molecular biology and more recent nomenclature investigations. The change of title reflects the actual area covered. Though sequencing techniques have revealed important information regarding higher-level taxonomy, the light microscope, as the basic tool for routine microplankton investigations, still offers the most reliable comparative data for qualitative and quantitative studies.
Jahn Throndsen is a professor emeritus in marine botany from the University of Oslo and has, using culture methods, studied non-preservable species in marine coastal and oceanic waters by light and electron microscopy. In addition to being editor of the previous version, he was also responsible for the content, exclusive of dinoflagellates and diatoms. Together with Wenche Eikrem, he is responsible for updating the present version.
Grethe Rytter Hasle (1920-2013) was a professor in marine botany at the University of Oslo, and was, throughout a very active career in scientific research, also leading a number of international expert courses. She kept a strong position in international diatom research and was honoured with several prizes. Her valuable collection of permanent diatom preparations is now at the Natural History Museum. Grethe Hasle was responsible for the diatom section in the original version of the book.
Karl Tangen is a now-retired senior scientist from SINTEF Fisheries and Aquaculture in Trondheim, where his main duty was the surveillance of phytoplankton in coastal areas. He has extensive international experience in research and teaching. Tangen's research speciality was dinoflagellates and harmful algae, and he was responsible for the dinoflagellate section in the original version of the book.
Wenche Eikrem is an associate professor at the University of Oslo, specialising in microprotists, while also curating the Hasle diatom collection at the Natural History Museum, and is a senior scientist at the Norwegian Institute for Water Research. Her experience extends from picoplankton to microplankton taxonomy with an emphasis on harmful species, using light and electron microscopy to reveal microanatomy and identity. Together with Jahn Throndsen, she is responsible for updating the present version.