A broad ecological approach to study the biological uptake of dissolved organic matter (DOM) and DOM-flocculates in the rapidly changing Arctic coastal ecosystems

Información del proyecto

FlocDOM

Identificador del acuerdo de subvención: 800371

DOI

10.3030/800371

Proyecto cerrado

Fecha de la firma de la CE 9 Marzo 2018

Fecha de inicio 1 Febrero 2019

Fecha de finalización 16 Febrero 2022

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 200 194,80

Aportación de la UE

€ 200 194,80

Coordinado por

AARHUS UNIVERSITET
Denmark

Objetivo

The Arctic Ocean receives a vast amount of organic carbon via runoff from surrounding glaciers and thawing permafrost soils. This dissolved organic matter (DOM) comprises one of the world’s largest active carbon pools, i.e. can be respired to CO2 by heterotrophic organisms. Yet our understanding of how well this terrestrial carbon is degraded in the marine environment is poor. As recent climate warming accelerates the input of carbon to the coastal Ocean it becomes more urgent to study this matter as it may play a major part in determining whether the Arctic Ocean becomes a sink or a source of CO2 in the future. In the saltwater-freshwater interface of coastal environments, the salinity change causes the charge of the DOM molecules to change causing about 10-20% of this carbon pool to aggregate/flocculate into larger particles. Bacteria are the main degraders of DOM, however, with flocculation, a great proportion of the carbon becomes available to larger heterotrophic organisms, such as pelagic protists and benthic filter feeders. Via these flocs the carbon enters the food web at a higher level and escapes the microbial loop. This path is however rarely considered. The overall aim of this project is to improve the knowledge on the response of heterotrophic organisms to terrestrial organic carbon supply (both from glaciers and soils) with focus on the coastal ecosystems of Greenland. I will track the degradation paths of both DOM and flocculated DOM using a combination of controlled laboratory studies and field studies using radioisotope tracers. The project ‘FlocDOM’ proposes a much-needed effort for a holistic ecological approach to assess the effects of increased runoff in the Arctic and to quantify for the first time the salt-induced aggregation, subsequent mineralization and burial of various terrestrial DOM pools in the Arctic.

Ámbito científico (EuroSciVoc)

• ciencias naturales › ciencias biológicas › microbiología › bacteriología
• ciencias naturales › ciencias biológicas › ecología › ecosistemas › ecosistemas costeros

Programa(s)

• H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions PROGRAMA PRINCIPAL
  
• H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
  

Tema(s)

• MSCA-IF-2017 - Individual Fellowships
  

Régimen de financiación

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

Convocatoria de propuestas

H2020-MSCA-IF-2017

Coordinador

AARHUS UNIVERSITET

• Aportación neta de la UEn: € 200 194,80
• Dirección: NORDRE RINGGADE 1 ; 8000 Aarhus C ; Dinamarca
• Región: Danmark › Midtjylland › Østjylland
• Tipo de actividad: Higher or Secondary Education Establishments
• Coste total: € 200 194,80