13 Works

Genomic analysis finds no evidence of canonical eukaryotic DNA processing complexes in a free-living protist

Dayana Salas-Leiva, Eelco Tromer, Bruce Curtis, Jon Jerlström-Hultqvist, Martin Kolisko, Zhenzhen Yi, Joan Salas-Leiva, Lucie Gallot-Lavallée, Shelby Williams, Geert Kops, John Archibald, Alastair Simpson & Andrew Roger
Cells replicate and segregate their DNA with precision. Previous studies showed that these regulated cell-cycle processes were present in the last eukaryotic common ancestor and that their core molecular parts are conserved across eukaryotes. However, some metamonad parasites have secondarily lost components of the DNA processing and segregation apparatuses. To clarify the evolutionary history of these systems in these unusual eukaryotes, we generated a genome assembly for the free-living metamonad Carpediemonas membranifera and carried out...

Climate change exacerbates nutrient disparities from seafood

William Cheung, Eva Maire, Muhammed Oyinlola, James Robinson, Nicholas Graham, Aaron MacNeil & Christina Hicks
Seafood is an important source of bioavailable micronutrients supporting human health, yet it is unclear how climate change will influence its availability. Here, combining observational databases and predictive models, we assess nutrient availability from fisheries and mariculture in the past, and project their future under climate change. Since the 1990s, availability of iron, calcium, omega-3 and protein from seafood has declined, with increasing contributions of invertebrates and mariculture failing to compensate for these loses. Nutrient...

Proteomic traits vary across taxa in a coastal Antarctic phytoplankton bloom

J. Scott P. McCain, Andrew E. Allen & Erin M. Bertrand
Production and use of proteins is under strong selection in microbes, but it is unclear how proteome-level traits relate to ecological strategies. We identified and quantified proteomic traits of eukaryotic microbes and bacteria through an Antarctic phytoplankton bloom using in situ metaproteomics. Different taxa, rather than different environmental conditions, formed distinct clusters based on their ribosomal and photosynthetic proteomic proportions, and we propose that these characteristics relate to ecological differences. We defined and used a...

Niche conservation in copepods between ocean basins

Niall McGinty, Andrew Barton, David Johns, Zoe Finkel & Andrew Irwin
This dataset provides the necessary data to test for niche conservatism as demonstrated in the article "Niche conservatism in copepods between ocean basins; 10.1111/ecog.05690". Our study examined niche conservatism (i.e. a species' niche remains stable in space and time) between populations of the same species of marine copepod in different ocean basins. We used two approaches to test for niche conservatism which can be defined as a Princpial Component Analysis (PCA) and Environmental Niche Model...

Genomic evidence of past and future climate-linked loss in a migratory Arctic fish

Kara K. S. Layton, Paul V. R. Snelgrove, J. Brian Dempson, Tony Kess, Sarah J. Lehnert, Paul Bentzen, Steven J. Duffy, Amber M. Messmer, Ryan R. E. Stanley, Claudio DiBacco, Sarah J. Salisbury, Daniel E. Ruzzante, Cameron M. Nugent, Moira M. Ferguson, Jong S. Leong, Ben F. Koop & Ian R. Bradbury
Despite widespread biodiversity losses, an understanding of how most taxa will respond to future climate change is lacking. Here we integrate genomics and environmental modelling to assess climate change responses in an ecologically and economically important Arctic species. Environmentally associated genomic diversity and machine learning are used to identify highly vulnerable populations of anadromous (migratory) Arctic charr, and we reconstruct estimates of effective population size spanning the twentieth century to identify past climate-associated declines. We...

Enabling conditions for an equitable and sustainable blue economy

Andrés M. Cisneros-Montemayor, Marcia Moreno-Baez, Gabriel Reygondeau, William W.L. Cheung, Katherine M. Crosman, Pedro C. Gonzalez-Espinosa, Vicky W.Y. Lam, Muhammed A. Oyinlola, Gerald G. Singh, Wilf Swartz, Yoshitaka Ota & Chong-Wei Zheng
The future of the global ocean economy is currently envisioned as an advancement towards a ‘Blue Economy’—socially equitable, environmentally sustainable, and economically viable ocean industries. However, there are current tensions between development discourses from perspectives of natural capital versus social equity and environmental justice. Here we show there are stark differences in Blue Economy outlooks when social conditions and governance capacity beyond resource availability are considered, and highlight limits to establishing multiple overlapping industries. The...

Cellular costs underpin micronutrient limitation in phytoplankton

J. Scott P. McCain, Alessandro Tagliabue, Edward Susko, Eric P. Achterberg, Andrew E. Allen & Erin M. Bertrand
Micronutrients control phytoplankton growth in the ocean, influencing carbon export and fisheries. It is currently unclear how micronutrient scarcity affects cellular processes, and how interdependence across micronutrients arises. We show that proximate causes of micronutrient growth limitation and interdependence are governed by cumulative cellular costs of acquiring and using micronutrients. Using a mechanistic proteomic allocation model of a polar diatom focused on iron and manganese, we demonstrate how cellular processes fundamentally underpin micronutrient limitation, and...

RADseq data for Atlantic Halibut in the Northwest Atlantic

Tony Kess, Anthony Einfeldt, Brendan Wringe, Sarah Lehnert, Kara Layton, Meghan McBride, Dominique Robert, Jonathan Fisher, Arnault Le Bris, Cornelia Den Heyer, Nancy Shackell, Daniel Ruzzante, Paul Bentzen & Ian Bradbury
Characterizing the nature of genetic differentiation among individuals and populations and its distribution across the genome is increasingly important to inform both conservation and management of exploited species. Atlantic Halibut (Hippoglossus hippoglossus) is an ecologically and commercially important fish species, yet knowledge of population structure and genomic diversity in this species remains lacking. Here, we use restriction-site associated DNA sequencing and a chromosome-level genome assembly to identify over 86,000 single nucleotide polymorphisms mapped to 24...

Allee effects and the allee-effect zone in a northwest atlantic cod

Tommi Perälä, Anna Kuparinen & Jeffrey Hutchings
According to the theory of compensatory dynamics, depleted populations should recover when the threat responsible for their decline is removed because per capita population growth is assumed to be highest when populations are at their smallest viable sizes. Yet, many seriously depleted fish populations have failed to recover despite threat mitigation. Atlantic cod (Gadus morhua) off Newfoundland despite thirty years of dramatically reduced fishing mortality and numerous fishery closures has not recovered suggesting that drivers...

Multiple-batch spawning as a bet-hedging strategy in highly stochastic environments: an exploratory analysis of Atlantic cod

Sara Hocevar, Jeffrey A. Hutchings & Anna Kuparinen
Stochastic environments shape life-history traits and can promote selection for risk-spreading strategies, such as bet-hedging. Although the strategy has often been hypothesised to exist for various species, empirical tests providing firm evidence have been rare, mainly due to the challenge in tracking fitness across generations. Here, we take a ‘proof of principle’ approach to explore whether the reproductive strategy of multiple-batch spawning constitutes a bet-hedging. We used Atlantic cod (Gadus morhua) as the study species...

Data from: Cannabis labelling is associated with genetic variation in terpene synthase genes

Sophie Watts, Michel McElroy, Zoë Migicovsky, Hugo Maassen, Robin Van Velzen & Sean Myles
Genetic data consisting of >100,000 single nucleotide polymorphisms (SNPs) collected using genotype-by-sequencing, from 137 drug-type Cannabis samples from the Netherlands. This genetic data along with terpene and cannabinoid content data collected with GC-FID, was used to analyze Cannabis labelling and to perfom a genome-wide association study.

Protecting the global ocean for biodiversity, food and climate

Enric Sala, Juan Mayorga, Darcy Bradley, Reniel Cabral, Trisha Atwood, Arnaud Auber, William Cheung, Francesco Ferretti, Alan Friedlander, Steven Gaines, Cristina Garilao, Whitney Goodell, Benjamin Halpern, Audra Hinson, Kristin Kaschner, Kathleen Kesner-Reyes, Fabien Leprieur, Jennifer McGowan, Lance Morgan, David Mouillot, Juliano Palacios-Abrantes, Hugh Possingham, Kristin Rechberger, Boris Worm & Jane Lubchenco
The ocean contains unique biodiversity, provides valuable food resources, and is a major sink for anthropogenic carbon. Marine protected areas (MPAs) are an effective tool for restoring ocean biodiversity and ecosystem services but at present only 2.7% of the ocean is highly protected. This low level of ocean protection is due largely to conflicts with fisheries and other extractive uses. To address this issue, here we developed a conservation planning framework to prioritize highly protected...

ISIMIP3b fishing input data

Yannick Rousseau, Julia Blanchard & Derek Tittensor
The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) provides a framework for the collation of a consistent set of climate impact data across sectors and scales. It also provides a unique opportunity for considering interactions between climate change impacts across sectors through consistent scenarios.
The ISIMIP3b part of the third simulation round is dedicated to a quantification of climate-related risks at different levels of global warming and socio-economic change. ISIMIP3b group I simulations are based on historical...

Registration Year

  • 2021
    13

Resource Types

  • Dataset
    13

Affiliations

  • Dalhousie University
    13
  • University of British Columbia
    3
  • Fisheries and Oceans Canada
    2
  • Memorial University of Newfoundland
    2
  • Scripps Institution of Oceanography
    2
  • University of Jyväskylä
    2
  • Parks Canada
    1
  • University of Washington
    1
  • The Nature Conservancy
    1
  • Utah State University
    1