Faculty profile

Julie LaRoche

ResearcherbiologyDalhousie University

This profile is built from public research funding records (CIHR, NSERC and SSHRC) and PubMed. We have not imported them from a Dalhousie University directory, so their courses may be missing. Find their university profile.

Julie LaRoche

Researcher

biology

Natural Sciences

Dalhousie University

Halifax, Nova Scotia, Canada

Supervision signals

Has led research grants, which requires an independent research appointment. Ask their department whether they supervise graduate students.
21 publications in the last five years, latest in 2026.
Senior (last) author on 12 recent papers, a sign of leading a research group.
Principal investigator on 14 research grants (13 NSERC, 1 CIHR), most recently in 2022.

These signals come from public records, including CIHR, NSERC and SSHRC funding decisions. Ask the professor or the graduate program whether they are taking new students.

Academic metrics

Publications

Collaborators

Grants

Publications by year

Counts cover the publications linked to this profile. Citations and the h-index appear when the source records them.

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Signals and details

Research

dinitrogen fixation heterotrophic diazotrophs marine biogeochemistry marine nitrogen cycle microbial communities microbial observatory microbiome nitrification

Latest papers

Automated eDNA and eRNA profiling for biodiversity monitoring in marine and freshwater ecosystems.
Scientific reports · 2026 · senior author
Comparison of Spatio-Temporal Dynamics and Composition in Size-Fractionated and Unfractionated Northwestern Atlantic Microbial Communities.
Environmental microbiology reports · 2026 · senior author
Diverse community of rhizobia-diatom symbioses fixes nitrogen in the South Pacific gyre.
ISME communications · 2025

All 37 publications

Latest funding

BELAS: Biological Carbon Export in the Labrador Sea
NSERC · 2023 · Co-investigator
$340,313
Quantifying sediment carbon dynamics in situ and the implication for the ocean alkalinity enhancement approach to marine carbon dioxide removal.
NSERC · 2023 · Co-investigator
$163,800
OFI SF7 Assessing the effects of Ocean Alkalinity Enhancement (OAE) on the marine microbiome
NSERC · 2022 · Principal investigator
$29,000

All 19 grants and awards

37 publications.

Automated eDNA and eRNA profiling for biodiversity monitoring in marine and freshwater ecosystems.

Beiko RG, Tolman J, Barawi SS, Fares M, Murthy SSN, Knox T, Mackie CM, Grundke I, Jeffery NW, Stanley RRE, Sieben V, LaRoche J

Scientific reports2026Senior author

DOI: 10.1038/s41598-026-58421-1 PMID: 42350494

Comparison of Spatio-Temporal Dynamics and Composition in Size-Fractionated and Unfractionated Northwestern Atlantic Microbial Communities.

Haider D, Tolman J, Beiko RG, LaRoche J

Environmental microbiology reports2026Senior author

DOI: 10.1111/1758-2229.70206 PMID: 41652859

Diverse community of rhizobia-diatom symbioses fixes nitrogen in the South Pacific gyre.

Esti M, Philippi M, Duerschlag J, Ferdelman TG, Tolman J, LaRoche J, Martínez-Pérez C, Lavik G, Tschitschko B, Wong HL, Kraberg A, Littmann S, Kidane AT, Mohr W, Kuypers MMM

ISME communications2025

DOI: 10.1093/ismeco/ycaf207 PMID: 41334095

Organellar Genomes of Three Globally Important Nanoplanktonic Diatoms Refine Their Taxon-Specific Distribution and Succession Patterns in the Northwest Atlantic.

Stevens-Green R, Chénard C, Mordret S, MacKinnon J, Robicheau BM, LaRoche J

The Journal of eukaryotic microbiology2025Senior author

DOI: 10.1111/jeu.70033 PMID: 40765478

Metagenomics reveals the genetic diversity between sublineages of UCYN-A and their algal host plastids.

Kantor EJH, Robicheau BM, Tolman J, Archibald JM, LaRoche J

ISME communications2024Senior author

DOI: 10.1093/ismeco/ycae150 PMID: 39670058

Production and utilization of pseudocobalamin in marine Synechococcus cultures and communities.

Bannon CC, Soto MA, Rowland E, Chen N, Gleason A, Devred E, LaRoche J, Bertrand EM

Environmental microbiology2024

DOI: 10.1111/1462-2920.16701 PMID: 39445547

Marine microbiology: How to evolve a nitrogen-fixing organelle.

LaRoche J, Archibald JM

Current biology : CB2024First author

DOI: 10.1016/j.cub.2024.07.071 PMID: 39255767

Nitrogen fixation in the widely distributed marine γ-proteobacterial diazotroph Candidatus Thalassolituus haligoni.

Rose SA, Robicheau BM, Tolman J, Fonseca-Batista D, Rowland E, Desai D, Ratten JM, Kantor EJH, Comeau AM, Langille MGI, Jerlström-Hultqvist J, Devred E, Sarthou G, Bertrand EM, LaRoche J

Science advances2024Senior author

DOI: 10.1126/sciadv.adn1476 PMID: 39083619

Mock microbial community meta-analysis using different trimming of amplicon read lengths.

Haider D, Hall MW, LaRoche J, Beiko RG

Environmental microbiology2024

DOI: 10.1111/1462-2920.16566 PMID: 38149467

Marine nitrogen-fixers in the Canadian Arctic Gateway are dominated by biogeographically distinct noncyanobacterial communities.

Robicheau BM, Tolman J, Rose S, Desai D, LaRoche J

FEMS microbiology ecology2023Senior author

DOI: 10.1093/femsec/fiad122 PMID: 37951299

BELAS: Biological Carbon Export in the Labrador Sea

Co-investigatorNSERC2023Discovery Grants Program - Ship Time

Principal investigators: Bertrand, Erin E

Keywords: BGC Argo; biological carbon pump; carbon export; climate change; international collaboration; Labrador Sea; molecular indicies; phytoplankton bloom

$340,313

Quantifying sediment carbon dynamics in situ and the implication for the ocean alkalinity enhancement approach to marine carbon dioxide removal.

Co-investigatorNSERC2023Discovery Grants Program - Ship Time

Principal investigators: Musgrave, Ruth RC

Keywords: allkalinity; biogeochemistry; carbonate chemistry; carbon change; carbon dioxide; fluxes; geoengineering; microbial diversity; sediments

$163,800

OFI SF7 Assessing the effects of Ocean Alkalinity Enhancement (OAE) on the marine microbiome

Principal investigatorNSERC2022Alliance Grants

Principal investigators: LaRoche, Julie J

$29,000

Integrated measurements of GHG emissions at an intermediate port

Co-investigatorNSERC2022Alliance Grants

Principal investigators: Wiacek, Aldona A

Keywords: air-sea ghg flux measurements; anthropogenic marine ghg emissions; ghg flux sensors; greenhouse gas measurements; marine edna sampling; marine microbial ghg production; open-path ftir spectroscopy; port and harbour ghg instrumentation; ports and harbours ghg emissions

$983,068

OFI SF6 Biosurveillance of MSX and other oyster diseases in the Bras d'Or Lakes: Establishment of an end-to-end platform for rapid on-site detection of known oyster parasites from environmental DNA

Principal investigatorNSERC2021Alliance Grants

Principal investigators: LaRoche, Julie

$20,613

The impact of oceanic microbial communities on marine biogeochemistry now and in the future

Principal investigatorNSERC2021Discovery Grants Program - Individual

Principal investigators: LaRoche, Julie

Keywords: microbial communities; dinitrogen fixation; nutrient limitation; microbiome; marine biogeochemistry; microbial observatory; phytoplankton; marine nitrogen cycle; nitrification; heterotrophic diazotrophs

$132,000

Renewal of essential flow cytometry instrumentation for the study of marine microbes

Principal investigatorNSERC2021Research Tools and Instruments

Principal investigators: LaRoche, Julie

$105,789

An autonomous submersible profiling and incubation system to investigate in-situ microbial activity and function in low oxygen waters

Co-investigatorNSERC2020Research Tools and Instruments

Principal investigators: MaldonadoPareja, Maria

$150,000

Marine Microbial Genomics and Biogeochemistry

Principal investigatorNSERC2018Canada Research Chairs

Principal investigators: LaRoche, Julie

Keywords: N2-fixation; microbial community; climate change; Northwest Atlantic; Labrador Sea; Time-series observations; genomics; metagenomics; transcriptomics; proteomics; Next generation sequencing; bioinformatics; diazotroph

$800,000

Marine Microbial Genomics and Biogeochemistry

Principal investigatorNSERC2018Canada Research Chairs

Principal investigators: Laroche, Julie

$200,000

From CIHR, NSERC and SSHRC funding decisions: CIHR since 2008, NSERC since 1991 and SSHRC since 1998, including their latest published competition results.

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Julie LaRoche

Research

Latest papers

Latest funding

Automated eDNA and eRNA profiling for biodiversity monitoring in marine and freshwater ecosystems.

Comparison of Spatio-Temporal Dynamics and Composition in Size-Fractionated and Unfractionated Northwestern Atlantic Microbial Communities.

Diverse community of rhizobia-diatom symbioses fixes nitrogen in the South Pacific gyre.

Organellar Genomes of Three Globally Important Nanoplanktonic Diatoms Refine Their Taxon-Specific Distribution and Succession Patterns in the Northwest Atlantic.

Metagenomics reveals the genetic diversity between sublineages of UCYN-A and their algal host plastids.

Production and utilization of pseudocobalamin in marine Synechococcus cultures and communities.

Marine microbiology: How to evolve a nitrogen-fixing organelle.

Nitrogen fixation in the widely distributed marine γ-proteobacterial diazotroph Candidatus Thalassolituus haligoni.

Mock microbial community meta-analysis using different trimming of amplicon read lengths.

Marine nitrogen-fixers in the Canadian Arctic Gateway are dominated by biogeographically distinct noncyanobacterial communities.

BELAS: Biological Carbon Export in the Labrador Sea

Quantifying sediment carbon dynamics in situ and the implication for the ocean alkalinity enhancement approach to marine carbon dioxide removal.

OFI SF7 Assessing the effects of Ocean Alkalinity Enhancement (OAE) on the marine microbiome

Integrated measurements of GHG emissions at an intermediate port

OFI SF6 Biosurveillance of MSX and other oyster diseases in the Bras d'Or Lakes: Establishment of an end-to-end platform for rapid on-site detection of known oyster parasites from environmental DNA

The impact of oceanic microbial communities on marine biogeochemistry now and in the future

Renewal of essential flow cytometry instrumentation for the study of marine microbes

An autonomous submersible profiling and incubation system to investigate in-situ microbial activity and function in low oxygen waters

Marine Microbial Genomics and Biogeochemistry

Marine Microbial Genomics and Biogeochemistry

Frequent collaborators

Vincent Sieben

Maycira Costa

Douglas Wallace

Paul Hill

Marlon Lewis

Hong Gu

Rich Pawlowicz

Danielle Way

Hugh MacIntyre

William Cheung

Thomas Trappenberg

Helmuth Thomas

Julie LaRoche

Research

Latest papers

Latest funding

Automated eDNA and eRNA profiling for biodiversity monitoring in marine and freshwater ecosystems.

Comparison of Spatio-Temporal Dynamics and Composition in Size-Fractionated and Unfractionated Northwestern Atlantic Microbial Communities.

Diverse community of rhizobia-diatom symbioses fixes nitrogen in the South Pacific gyre.

Organellar Genomes of Three Globally Important Nanoplanktonic Diatoms Refine Their Taxon-Specific Distribution and Succession Patterns in the Northwest Atlantic.

Metagenomics reveals the genetic diversity between sublineages of UCYN-A and their algal host plastids.

Production and utilization of pseudocobalamin in marine Synechococcus cultures and communities.

Marine microbiology: How to evolve a nitrogen-fixing organelle.

Nitrogen fixation in the widely distributed marine &#x3b3;-proteobacterial diazotroph Candidatus Thalassolituus haligoni.

Mock microbial community meta-analysis using different trimming of amplicon read lengths.

Marine nitrogen-fixers in the Canadian Arctic Gateway are dominated by biogeographically distinct noncyanobacterial communities.

BELAS: Biological Carbon Export in the Labrador Sea

Quantifying sediment carbon dynamics in situ and the implication for the ocean alkalinity enhancement approach to marine carbon dioxide removal.

OFI SF7 Assessing the effects of Ocean Alkalinity Enhancement (OAE) on the marine microbiome

Integrated measurements of GHG emissions at an intermediate port

OFI SF6 Biosurveillance of MSX and other oyster diseases in the Bras d'Or Lakes: Establishment of an end-to-end platform for rapid on-site detection of known oyster parasites from environmental DNA

The impact of oceanic microbial communities on marine biogeochemistry now and in the future

Renewal of essential flow cytometry instrumentation for the study of marine microbes

An autonomous submersible profiling and incubation system to investigate in-situ microbial activity and function in low oxygen waters

Marine Microbial Genomics and Biogeochemistry

Marine Microbial Genomics and Biogeochemistry

Frequent collaborators

Vincent Sieben

Maycira Costa

Douglas Wallace

Paul Hill

Marlon Lewis

Hong Gu

Rich Pawlowicz

Danielle Way

Hugh MacIntyre

William Cheung

Thomas Trappenberg

Helmuth Thomas

Nitrogen fixation in the widely distributed marine γ-proteobacterial diazotroph Candidatus Thalassolituus haligoni.