News

To solve climate change, remember the ocean

Abstract.

"More than two-thirds of the planet is covered by ocean, but these waters have not received their due in terms of research dollars or public attention. That means the dangers that the seas face from climate change — and the solutions that they offer — are often overlooked. [...]"

Source: Nature
Authors: Janis Searles Jones
DOI: 10.1038/d41586-019-02832-w

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Anaerobic nitrogen cycling on a Neoarchaean ocean margin

Abstract.

"A persistently aerobic marine nitrogen cycle featuring the biologically mediated oxidation of ammonium to nitrate has likely been in place since the Great Oxidation Event (GOE) some 2.3 billion years ago. Although nitrogen isotope data from some Neoarchaean sediments suggests transient nitrate availability prior to the GOE, these data are open to other interpretations. [...]"

Source: Earth and Planetary Science Letters
Authors: C.Mettam et al.
DOI: 10.1016/j.epsl.2019.115800

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Marine fish kill in Jurien Bay Marina is being investigated

"Investigations are underway following the report of a fish kill at the Jurien Bay Marina, where large numbers of dead fish from a range of species have been found.

Department of Primary Industries and Regional Development officers are investigating the event, to gather information and assess the extent of the fish kill. They have also gathered suitable fish and water samples for laboratory testing. [...]"

Source: Department of Primary Industries and Regional Development (Australia)

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Microbial metabolite fluxes in a model marine anoxic ecosystem

Abstract.

"Permanently anoxic regions in the ocean are widespread and exhibit unique microbial metabolic activity exerting substantial influence on global elemental cycles and climate. Reconstructing microbial metabolic activity rates in these regions has been challenging, due to the technical difficulty of direct rate measurements. In Cariaco Basin, which is the largest permanently anoxic marine basin and an important model system for geobiology, long‐term monitoring has yielded time series for the concentrations of biologically important compounds; however, the underlying metabolite fluxes remain poorly quantified. [...]"

Source: Geobiology
Authors: Stilianos Louca et al.
DOI: 10.1111/gbi.12357

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Constraining the Oceanic Uptake and Fluxes of Greenhouse Gases by Building an Ocean Network of Certified Stations:

The Ocean Component of the Integrated Carbon Observation System, ICOS-Oceans

Abstract.

"The European Research Infrastructure Consortium “Integrated Carbon Observation System” (ICOS) aims at delivering high quality greenhouse gas (GHG) observations and derived data products (e.g., regional GHG-flux maps) for constraining the GHG balance on a European level, on a sustained long-term basis. The marine domain (ICOS-Oceans) currently consists of 11 Ship of Opportunity lines (SOOP – Ship of Opportunity Program) and 10 Fixed Ocean Stations (FOSs) spread across European waters, including the North Atlantic and Arctic Oceans and the Barents, North, Baltic, and Mediterranean Seas. [...]"

Source: Frontiers in Marine Science
Authors: Tobias Steinhoff et al.
DOI: 10.3389/fmars.2019.00544

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Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification

Abstract.

"Natural variability in pH in the diffusive boundary layer (DBL), the discrete layer of seawater between bulk seawater and the outer surface of organisms, could be an important factor determining the response of corals and coralline algae to ocean acidification (OA). Here, two corals with different morphologies and one coralline alga were maintained under two different regimes of flow velocities, pH, and light intensities in a 12 flumes experimental system for a period of 27 weeks. [...]"

Source: Scientific Reports
Authors: S. Comeau et al.
DOI: 10.1038/s41598-019-49044-w

Read the full article here.


Ocean Sciences Meeting

ABOUT THE OCEAN SCIENCES MEETING 2020

The Ocean Sciences Meeting (OSM) is the flagship conference for the ocean sciences and the larger ocean-connected community.  As we approach the UN Decade of Ocean Science for Sustainable Development, beginning in 2021, it is increasingly important to gather as a scientific community to raise awareness of the truly global dimension of the ocean, address environmental challenges, and set forth on a path towards a resilient planet. 

The Ocean Sciences Meeting 2020 is co-sponsored by AGU, the Association for the Sciences of Limnology and Oceanography (ASLO), and The Oceanography Society (TOS).  Through the combined power of these three organizations, along with the broader conservation-focused community, this meeting provides attendees the opportunity to bridge disciplines, connect communities, and make lasting partnerships. 

Visit the event homepage for more information and submit abstracts here.


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Combined effects of ocean acidification and temperature on larval and juvenile growth, development and swimming performance of European sea bass

Abstract.

"Ocean acidification and ocean warming (OAW) are simultaneously occurring and could pose ecological challenges to marine life, particularly early life stages of fish that, although they are internal calcifiers, may have poorly developed acid-base regulation. This study assessed the effect of projected OAW on key fitness traits (growth, development and swimming ability) in European sea bass (Dicentrarchus labrax) larvae and juveniles. [...]"

Source: PLoS One
Authors: Louise Cominassi etal.
DOI: 10.1371/journal.pone.0221283

Read the full article here.


Dinitrogen fixation across physico‐chemical gradients of the Eastern Tropical North Pacific oxygen deficient zone

Abstract.

"The Eastern Tropical North Pacific (ETNP) Ocean hosts one of the world's largest oceanic oxygen deficient zones (ODZs). Hotspots for reactive nitrogen (Nr) removal processes, ODZs generate conditions proposed to promote Nr inputs via dinitrogen (N2) fixation. In this study, we quantified N2 fixation rates by 15N‐tracer bioassay across oxygen, nutrient and light gradients within and adjacent to the ODZ. [...]"

Source: Global Biogeochemical Cycles
Authors: C.R. Selden et al.
DOI: 10.1029/2019GB006242

Read the full article here.


Chinese Scientists Develop Online Monitoring Instruments for Ocean Environmental Safety

"Chinese scientists have developed an online system to monitor marine-biochemical elements, according to Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, who led the project. The research team developed the online monitoring instruments by integrating three measurement modules namely, the chlorophyll module, productivity module and dissolved oxygen module, which are all developed by the team itself. [...]"

Source: Chinese Academy of Sciences

Read the full article here.


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