Royal Netherlands Institute for Sea Research
Phone number
+31 (0)222 36 9446
Location
Texel
Department
Ocean Systems (OCS)
Function
Postdoc
University
Universiteit Gent
Promotor
Karline Soetaert
Expertise
  • Pulse-chase experiments with stable isotopes (SI)
  • Compound-specific isotope analysis (fatty acids, amino acids)
  • Linear inverse modelling of benthic food-webs
  • Absorbance and fluorescence measurements of DOM (CDOM, FDOM)
  • Annotation of still images and processing of video material

Dr. Tanja Stratmann

Postdoc

(photo courtesy: ROV Kiel 6000, Geomar, Kiel, Germany)

Research interests

  •            Carbon cycling in polar waters and sea ice
  •       Structure and stability of deep-sea food webs
  •       Nutrient and oxygen fluxes of benthic megafauna (e.g. Porifera, Holothuroidea)
  •       Environmental impact of deep-sea mining
  •       Deep-sea diversity and ecology

Linked news

Friday 07 July 2023
Dossier: deep sea
Two-thirds of the earth's surface consists of oceans and seas. The deep-sea is the largest biome on earth, making up 90% of the ocean’s volume. Below 200 meters depth it is dark, as hardly any sunlight can penetrate, the pressure increases and food…
Thursday 22 June 2023
Deep seabed mining stakeholders meet to discuss how to protect hydrothermal vents
Stakeholder event: Current developments on deep seabed mining and the use of area-based management tools to protect hydrothermal vents
Monday 03 April 2023
"It is too early for commercial deep-sea mining"
"Extracting manganese nodules or other valuable metals from the bottom of the oceans is still fraught with many uncertainties. It is therefore far too early to proceed with commercial deep-sea mining at this time." So says marine biologist Sabine…
Monday 21 March 2022
Deep sea mining might start soon, still research needed
If it's up to mining companies, deep sea mining had already started many years ago. The International Seabed Authority (ISA) council 27th assembly starts today. Under pressure of several countries mining regulations are discussed. Independent…
Thursday 16 December 2021
2 Veni-grants for NIOZ researchers
The Netherlands Organisation for Scientific Research (NWO) has awarded a Veni grant worth 280,000 euros to 2 highly promising early career NIOZ scientists. The grant provides them with the opportunity to further elaborate their own ideas during a…
Thursday 10 June 2021
Sponges on valuable nodules enable high biodiversity ocean floor
Researchers from NIOZ and Germany have discovered that sponges, which like to settle on metallic nodules on the ocean floor, also provide a home for many other animals. Without the sponges, species richness in these deep-sea regions would be…
Tuesday 29 October 2019
Largest mapping of breathing ocean floor key to understanding global carbon cycle
Marine sediments play a crucial role in the global carbon cycle due to the oxygen consumption and CO2 respiration of the organisms that live in and on the ocean floor. To help predict the changing contribution of this respiration to the carbon cycle…
Thursday 27 September 2018
Diepzeemijnbouw veroorzaakt langdurige schade aan het ecosysteem
[English below Dutch] Het winnen van mangaanknollen in de diepzee levert langdurige milieuschade op. Dat concludeert NIOZ-onderzoekster Tanja Stratmann in haar proefschrift 'Benthic ecosystem response to polymetallic nodule extraction in the deep…
Tuesday 06 June 2017
Short-term effects of deep-sea mining waste on microbes and meiofauna at the seafloor
The addition of waste particles from deep-sea mining (iron ore mine tailings) affected the activity of nematodes and the microbial community in microcosm experiments with natural sediments collected at 200m depth in the Hardanger fjord (Norway).…

Linked blogs

Tuesday 13 December 2022
Deep sea mining would change the seafloor ecosystem for up to millions of years
“The unique and vulnerable ecosystems of the deep sea are the last ecosystems on earth that haven't been degraded by humans yet. In this muddy environment, potato-sized polymetallic nodules are the only hold-fast for immobile animals like corals,…

NIOZ publications

Linked projects

MIDAS_Managing Impacts of Deep-seA reSource exploitation
Supervisor
Dick van Oevelen
Funder
European Community
Project duration
1 Nov 2013 - 16 Feb 2018
Role of deep-sea sponges on carbon and nitrogen flows in deep-sea food webs
Supervisor
Tanja Stratmann
Funder
The Royal Netherlands Academy of Arts and Sciences
Project duration
1 Jan 2017 - 30 Jun 2017