Ecoloog vacatures in Nijmegen

Ph-positieD: Biominerals, Crystals and Climate

• Op locatie
• • 't Horntje, Texel , Noord-Holland , Nederland
• Ocean systems (OCS)

Vacature details Solliciteren

Functieomschrijving

The department of Ocean Systems (OCS: . ) at the Royal Netherlands Institute of Sea Research (NIOZ) is looking for a highly motivated PhD student with a background in cell biology/ (bio)geochemistry/ chemical oceanography to investigate biomineralization in foraminiferal calcite and its relation to climate change.

ROYAL NIOZ

NWO-NIOZ Royal Netherlands Institute for Sea Research is the Dutch national oceanographic institute and principally performs academically excellent multidisciplinary, fundamental, and frontier applied marine research addressing important scientific and societal questions pertinent to the functioning of the ocean and seas. NIOZ includes the National Marine research Facilities (NMF) department that operates a fleet of research vessels and the national pool of large seagoing equipment, and supports excellence in multidisciplinary marine research, education, and policy development.

THE DEPARTMENT

The department of Ocean Systems (OCS) studies the role of the ocean in a changing climate, from equator to pole, from the continental shelf to the deep ocean and from the past to the present. The ocean is Earth's largest reservoir of CO2 and heat; circulation, mixing, biogeochemistry and other marine processes strongly impact global climate. Advanced ocean observations allow us to decipher the current and future functioning of the ocean. Furthermore, seafloor sediments have recorded past changes in conditions on land and in the ocean, in the form of biological residues or physical and chemical signals, which allow us to reconstruct feedbacks between oceanic processes and climate in the (ancient) past. Today, the ocean is changing rapidly because of (human) stressors such as excess CO2, warming and eutrophication. This impacts on the strongly linked but poorly understood ocean processes that control marine ecosystem functioning and thereby climate. The OCS department investigates ocean functioning by means of sea-going expeditions, during which data and samples are collected from the water column and the seafloor. The samples are analyzed in on-board and on-shore laboratories and we have collected a large information and sample repository over past decades.

THE PROJECT

Within the BICYCLE research project (for a PhD position at the NIOZ and an accompanying position at the Radboud UMC in Nijmegen) we the basics of calcification by one of the most important marine calcifying organisms, the foraminifera. This is directly relevant for marine carbon cycling, atmospheric CO2 levels and thereby, Earth's climate. Our inability to predict how marine calcification will be impacted by climate change, is due to our incomplete understanding of the calcification process. Marine calcification consists of cellular machinery that 1) takes up ions from seawater (i.e. calcium and carbon) and 2) controls how these ions precipitate into crystalline calcium carbonate (i.e. the shell or skeleton). This project will investigate these two aspects in foraminifera with the aim to construct a complete model of the calcification process. We will specifically identify which parts of the calcification pathway are (most) affected by changes in temperature and CO2, to be able to predict how calcification is affected by climate change. This in turn, will place a biologically important process into global carbon cycle models and thereby improve predictions of the consequences of ongoing CO2 emissions.

YOUR ROLE

Within this project, you will focus on biochemical/ cellular processes responsible for calcium carbonate precipitation, in particular in relation to seawater p CO2 and temperature. Using a broad array of (analytical) equipment at NIOZ (e.g. confocal laser scanning microscopy laser ablation-ICP-MS,) you will investigate ion uptake mechanism and crystallization dynamics: this will help predicting future marine calcification rates and thereby help understanding carbon cycling in a changing ocean. Close collaboration with the group of Sommerdijk at Radboud UMC will allow nanometer-scale resolution analysis of the calcifying microenvironment in these foraminifera. Novel techniques including high-pressure freezing and fluorescent/ cry-FIB SEM imaging will be applied and will complement experiments at the NIOZ. Handling living foraminifera is an essential part of this project in combination with high-resolution analysis of marine inorganic carbon chemistry. Affinity with chemistry/crystallography and (cell) biology is therefore of added value. You are expected to contribute pro-actively to open and effective exchange of ideas and results within our department and with other (inter)national colleagues. You present the data from experiments and at (international) conferences and you prepare scientific articles for publication in peer-reviewed journals. Within OCS, you share your knowledge and expertise with your colleagues in an open, safe and inclusive environment.

Vereisten

THE CANDIDATE

We seek an enthusiastic and energetic student who has a keen interest in marine biogeochemistry, cell biology and microscopy. You are a team player, with:

• An MSc degree in biology, earth sciences, marine scienes or a related field

• Experience and affinity with biogeochemistry and marine research

• Passion for chemical laboratory work and data analysis

• An open, communicative and collaborative attitude

• Strong communication skills in English

We want to be a transparent institute with a healthy working climate and an inclusive culture, where people from diverse backgrounds and gender bring their talents and further develop these talents. We aim for inclusive decision-making processes and expect our leadership to show visible commitment, awareness of bias, and cultural intelligence.

THE CONDITIONS

• Employment of this full-time position at Royal NIOZ is by NWO-I , for a total duration of 4 years. You start with an appointment for the duration of 1 year, that, after a positive evaluation in the 9th month (Go-No go), will be extended to the full period of 4 years.

• Salary compliant with scales for PhD candidate (OIOs) CAO-WVOI (Collective Labour Agreement for Dutch Research Institutes).

• An appointment at NIOZ as a PhD candidate means working and learning simultaneously conform the NIOZ PhD policy.

• 338 annualized holiday hours for a full-time 40-hour work week.

• Pension scheme via ABP, 8% holiday allowance and a year-end bonus of 8.33%.

• 2nd class public transportation travel is reimbursed 100%.

• Employment benefits plan to exchange a portion of your salary for days off or vice versa, or can be used to purchase a bicycle with tax benefits.

• We offer relocation expenses for employees coming from abroad and support with finding accommodation.

For additional information about this vacancy, please contact . For additional information about the procedure, please send an e-mail to