OFI mobilizes knowledge by sharing the results of our research through contributions in journals, books, papers and other scientific publications.

Jun 11, 2019 | Anya Waite

Production and ecosystem structure in cold-core vs. warm-core eddies: Implications for the zooplankton isoscape and rock lobster larvae

Anticyclonic (warm-core) mesoscale eddies (WCEs) in the Eastern Indian Ocean carry higher surface chlorophyll signatures than cyclonic (cold-core) eddies (CCEs). Paradoxically, WCEs host rock lobster larvae (phyllosomas) with lower lipid stores and protein reserves than phyllosomas in CCEs, suggesting a poorer nutritional status. We assess primary productivity and zooplankton isotopic data from eight eddies across four research voyages (2003–2011) to determine how this contradiction might occur.

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May 10, 2019 | Paul Winger

Comparing size selectivity of traditional and knotless diamond-mesh codends in the Iceland redfish (Sebastes spp.) fishery

OFI researcher Paul Winger co-authored a paper in Science Direct that enhances understanding of fishing gear selectivity and provides guidance on what strategies can be used to limit the capture of small redfish.

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May 10, 2019 | Paul Winger Annie Mercier

Active buoyancy adjustment increases dispersal potential in benthic marine animals

While the study of dispersal and connectivity in the ocean typically centres on pelagic species and planktonic larval stages of benthic species, the present work explores an overlooked locomotor means in post‐settlement benthic stages that redefines their dispersal potential.

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Mar 26, 2019 | Douglas W. R. Wallace Elizabeth Kerrigan Claire Normandeau

A rare intercomparison of nutrient analysis at sea: lessons learned and recommendations to enhance comparability of open-ocean nutrient data

An intercomparison study has been carried out on the analysis of inorganic nutrients at sea following the operation of two nutrient analysers simultaneously on the GO-SHIP A02 trans-Atlantic survey in May 2017. Both instruments were Skalar San++ Continuous Flow Analyzers, one from the Marine Institute, Ireland and the other from Dalhousie University, Canada, each operated by their own laboratory analysts following GO-SHIP guidelines while adopting their existing laboratory methods. There was high comparability between the two data sets and vertical profiles of nutrients also compared well with those collected in 1997 along the same A02 transect by the World Ocean Circulation Experiment.

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Mar 20, 2019 | Julie LaRoche Debany Fonseca-Batista

Evidence of high nitrogen fixation rates in the temperate northeast Atlantic

Dinitrogen (N2) fixation is the major pathway of nitrogen (N) input to the global ocean and thereby contributes to sustaining oceanic primary productivity (Falkowski, 1997). The conversion by N2-fixing micro-organisms (diazotrophs) of dissolved N2 gas into bioavailable nitrogen also contributes to new production in the euphotic layer and, as such, to the subsequent sequestration of atmospheric carbon dioxide into the deep ocean (Gruber, 2008). Estimating the overall contribution of N2 fixation to carbon sequestration in the ocean requires an assessment of the global marine N2 fixation.

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Mar 12, 2019 | Julie LaRoche

Drivers of Regional Bacterial Community Structure and Diversity in the Northwest Atlantic Ocean

The fundamental role of bacteria in global biogeochemical cycles warrants a thorough understanding of the factors controlling bacterial community structure. In this study, the integrated effect of seasonal differences and spatial distribution on bacterial community structure and diversity were investigated at the regional scale.

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