About this Research Topic
Distribution of dissolved oxygen in the ocean is controlled by a combination of physical and biogeochemical processes. Recent observations show a declining trend in the inventory of dissolved oxygen in the ocean and the ongoing expansion and intensification of OMZs. Up to 40% of the fixed nitrogen loss from the ocean is estimated to occur in the OMZs, which in turn affect primary production. The expansion/intensification of OMZs have the potential to impact living resources and is therefore of socio-economic relevance. Furthermore, microbially mediated production of the greenhouse gases methane and nitrous oxide is enhanced under anoxic or low-oxygen conditions. Coastal upwelling systems connected to OMZs (e.g., off Peru and Chile) have thus been identified as the main oceanic source of these greenhouse gases to the atmosphere. In view of this, there is an immediate need to further our understanding of the biogeochemical cycles in OMZs to better predict future impacts from human-induced global warming to plan necessary mitigation/adaptation measures.
This Research Topic welcomes papers on the following specific themes:
• Novel biogeochemical processes and pathways in OMZs and their controlling factors
• Greenhouse gas cycling in OMZs
• Anthropogenic perturbations and intensification of OMZs
• Biogeochemical modelling
• OMZs and global climate change
• Emerging technologies to study the biogeochemistry of OMZs
• Microbial ecology of oxygen-deficient waters
Keeping in mind the above-mentioned themes, this Research Topic will seek (i) review articles that synthesize available information on OMZ biogeochemistry, (ii) recent developments that direct future research activities, and (iii) the impact of global warming and climate change on OMZ expansion and its biogeochemical feedbacks
Keywords: OMZ biogeochemistry, microbial ecology, carbon and nitrogen cycling, dissolved gases, climate change
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.