Per Juel Hansen

Per Juel Hansen

Professor

Physiology and function biology of marine plankton
I am generally interested in physiology and function biology (ecology) of planktonic organisms, community structure and function of microbial communities in marine environments. Recently, I have worked on effects of acidification (low pH) as well as on alkalinification (elevated pH) on plankton organisms. While acidification of the sea is an effect of our use of fossil fuels, alkalinification occurs in fjords and embayments during algal blooms due to high primary production.

The focus of my research group is presently on 1) Toxic algae associated with fish kills. We work with natural product chemists to discover new algal toxins associated with fish kills, and with fish physiologists on the mechanisms behind fish kills and possible immunological reactions of fish towards algal toxins. Finally, we study the costs and benefits of toxin production of marine phytoplankton, 2) Mixotrophy, which is the ability of organisms to simultaneous photosynthesize and eat. We usually split plankton organisms in to phytoplankton (“plants”) and zooplankton (animals). However, we are now aware of that many plankton organisms are in fact mixotrophs. We study the functional biology and physiology in both “algae” that eat as well as “animals” that utilize chloroplasts, which they steal from their algal prey.  

Current main projects
1) Bringing the paradigm for marine pelagic production into the 21st century: incorporating mixotrophy into mainstream marine research (MixITiN; EU-ITN Project, 2017-2021)

2) MarineBasisDisko. A marine monitoring programme in Disko Bay, Greenland. Part of the Greenland Environmental Monitoring programme (GEM) (MarineBasisDisko, Ministry of the Environment, since 2018)

Current Lab members
Maira Maselli, PhD Student (2018-2021)
Bringing the paradigm for marine pelagic production into the 21st century: incorporating mixotrophy into mainstream marine research (MixITiN; EU-ITN Project, 2017-2021)

Nikola Medic, PhD Student (2018-2021)
Bringing the paradigm for marine pelagic production into the 21st century: incorporating mixotrophy into mainstream marine research (MixITiN; EU-ITN Project, 2017-2021)

Kistine Drumm, PhD Student (2015-2020)
Photophysiology and nutrient dynamics among protists with acquired phototrophy 
(AQ-mix, FNU-DFF-2 project)

Erin Ann Hughes, MSc Student (2019-2020). Effects of light and prey starvation on the physiology of plastidic ciliates

Former Lab members
Post docs
Ruth Anderson (2015-2018)
Miran Kim (2016)
Nikolai Gedsted Andersen (2012-2015)
Terje Berge (2011-2014)
Louise K.Poulsen (2008-2009)
Anne-Lise Middelboe (2003-2006)
Nina Lundholm (2003-2006)
Harry Havskum (2002-2004)
Alf Skovgaard (2000-2002)

PhD students
Sofie Bjørnholt Binzer (2015-2019)
Hannah Blossom (2014-2018)
Lasse T. Nielsen (2008-2012)
Nikolaj Andersen (2008-2012)
Kristine Engel Arendt Hansen (2007-2011)
Terje Berge (2007-2011)
Lydia Garcia (2007-2011)
WorapornTarangkoon (2007-2010)
Morten Moldrup (2007-2010)
SureeSatapoomin (1999-2002)
Hans Henrik Jakobsen (1997-2000)
Alf Skovgaard (1996-1999) 

MSc students 
2016: Pernille Rusterholz
2015: Marcell Elo Petersen, Trine Callesen, Nicolai Andreas Munk Fassel,
Sofie Bjørnholt Mogensen
2014: Marina Pancic, Frededrik Wolff Teglhus, Thomas Bech-Thomassen 
2013: Christina Thoisen, Kirstine Drumm, Mette Liebst, Tine Bædkel
2012: Eleonora Bruno, Betinna Balling Andersen
2011: Julie Cornelius Grenvald, Hannah Blossom
2010: Rasmus Jakobsen
2009: Dorte Søgaard, Morten Kristensen
2008: Brian Christensen, Karen Riisgaard, Lasse T Nielsen
2006: Morten Smith, Lone Munk, Anders Jonsson, Terje Berge, Søren Parnas
2005: Mia Kristensen
2003: Kristine Engel Hansen
2002: Maria Fenger Pedersen
2000: Høgni Debes, Morten Hjorth
1998: Lisa Ejbye Smidth
1996: Hans Henrik Jakobsen
1995: Alf Skovgaard

ID: 10120