Statistical Modeling of Microbial Communities: Niches, Traits, and Interactions

Andrew Irwin
Dalhousie University

Marine microbial communities form the base of the marine food web and perform about half of the photosynthesis on Earth. They are key components of the global carbon cycle and help to sequester carbon in the deep ocean, removing it from the atmosphere, through the burial of organic matter on the seafloor. The productivity and function of marine microbial communities are determined in part by the biogeography — which species live where.

We will assemble and analyze observations of microbial communities to develop predictive statistical models that describe community composition. Additional statistical models will be developed to determine the physiological and ecological traits of species and groups of species that determine the growth rates of marine microbes.

Finally, we will analyze community composition data to determine sub-communities of species that tend to co-occur or tend to not be found together to better understand the complex interactions among species and the suites of traits of species that form stable communities.

CBIOMES Collaborators in the Irwin Group

News from the Irwin Group

NEW CBIOMES PUBLICATION

Niall McGinty, Andrew D. Barton, Zoe V. Finkel, David G. Johns and Andrew J. Irwin (2021), Niche conservation in copepods between ocean basins, Ecography, doi: 10.1111/ecog.05690 Get the PDF [Requires login]...

September 2021 CBIOMES e-meeting Joe Siddons (Dalhousie)

“Effects of Environmental Factors on Phytoplankton Co-occurrence Patterns” Please note access to this page is restricted to CBIOMES associates. (more…)

August 2021 CBIOMES e-meeting Mohammad Amirian Matlob (Dalhousie)

"Extending the Monod Model of Microbial Growth with Memory" Please note access to this page is restricted to CBIOMES associates. (more…)

Recordings and microtalks from the Irwin. Please note access to this page is restricted to CBIOMES associates. (more…)

March 2021 CBIOMES e-meeting Niall McGinty (Dal)

“Anthropogenic climate change impacts on copepod trait biogeography” Please note access to this page is restricted to CBIOMES associates. (more…)

CBIOMES Welcomes Sing-how Tuo

A warm welcome to postdoc Sing-how Tuo who joins the Irwin/Finkel Dalhousie CBIOMES Group this month. (more…)

NEW CBIOMES PUBLICATION

Niall McGinty, Andrew D Barton, Nicholas R Record, Zoe V Finkel, David G Johns, Charles A Stock, Andrew J Irwin (2020), Anthropogenic climate change impacts on copepod trait biogeography, Global Change Biology, doi: 10.1111/gcb.15499 Get the...

December 2020 CBIOMES (Poster) e-Meeting

To provide an opportunity to "pick up the conversation" and chat with colleagues about where work had gone since our Annual Meeting in June, the December gathering was an all-hands...

2020 Joint Simons Marine Collaborations Meeting

Please note access to this page is restricted to CBIOMES associates only. Besides CBIOMES, the Simons Foundation supports three other marine collaborations: BIOS-SCOPE, PriME, and SCOPE. A joint meeting, October...

Turning to Traits to Understand Phytoplankton Biomass Patterns

The Irwin Group uses statistical modeling techniques to understand niches, traits, and interactions within marine microbial communities. A new paper confirms the value of trait-based approaches in investigating the mechanisms...

NEW CBIOMES PUBLICATION

Mutshinda. C.M., Finkel, Z.V., Widdicombe, C.E. & Irwin, A.J. (2020), A trait-based taxonomy for phytoplankton biomass modeling and prediction, Diversity, doi: 10.3390/d12080295 Get the PDF [Requires login]

NEW CBIOMES PUBLICATION

A.W. Omta, D. Talmy, K. Inomura, A.J. Irwin, Z.V. Finkel, D. Sher, and M.J. Follows (2020), Quantifying nutrient throughput and DOM production by algae in continuous culture, Journal of Theoretical Biology, doi: 10.1016/j.jtbi.2020.110214 Get the PDF [Requires...

The Irwin Group goes to Annual Meeting

Andrew Irwin's Dalhousie-CBIOMES group leads the Statistical Modeling of Microbial Communities: Niches, Traits, and Interactions project which seeks to develop a new trait-based understanding of microbial communities structure. In his...

May 2020 CBIOMES e-meeting – Crispin Mutshinda (Dal)

"Bayesian inference to partition determinants of community dynamics from observational time series" Please note access to this page is restricted to CBIOMES associates. (more…)

NEW CBIOMES PUBLICATION

Crispin M. Mutshinda, Andrew J. Irwin, Mikko J. Sillanpää (2020), A Bayesian Framework for Robust Quantitative Trait Locus Mapping and Outlier Detection, The International Journal of Biostatistics, doi: 10.1515/ijb-2019-0038 Get the PDF...

Seen at Ocean Sciences: CBIOMES Posters

Several CBIOMES members shared posters at this year’s Ocean Sciences conference which took place in San Diego in February. Please note access to this page is restricted to CBIOMES associates....

NEW CBIOMES PUBLICATION

C. Mutshinda, C. Widdicombe, Z.V. Finkel, A.J. Irwin (2019), Bayesian inference to partition determinants of community dynamics from observational time series, Community Ecology, doi: 10.1556/168.2019.20.3.4 Get the PDF [Requires login]

CBIOMES Welcomes Mohammad Amirian Matlob

by Helen Hill for CBIOMES A warm welcome to graduate student Mohammad Amirian Matlob who joins Andrew Irwin's Dalhousie CBIOMES Group this month. (more…)

CBIOMES at CMStatistics2019

In December, several from CBIOMES traveled to London, England, to present their work at CMStatistics2019, a conference organized by the European Research Consortium for Informatics (ERCIM) Working Group on Computational...

CBIOMES Goes to Ocean Sciences 2020

Look out for members of the CBIOMES team, sharing their work at this year’s Ocean Sciences conference taking place February 16-21 in San Diego, California. (more…)

Fall 2019 SCOPE Gradients Workshop

Twelve from CBIOMES attended the 2019 Gradients Workshop held at the Alexis Hotel in Seattle WA October 15 through 17. Please note access to this page is restricted to CBIOMES...

NEW CBIOMES PUBLICATION

Catherine Fiset, Andrew J. Irwin, Zoe V. Finkel (2019), The macromolecular composition of non‐calcified marine macroalgae, Journal of Phycology, doi: 10.1111/jpy.12913 Get the PDF [Requires login]

Phytoplankton Realized Niches Track Changing Oceanic Conditions at a Long-Term Coastal Station off Sydney Australia

by Helen Hill for CBIOMES CBIOMES researchers in the Dalhousie Group looking at changes in phytoplankton biogeography in response to changing climate find mean phytoplankton niches closely tracked changes in mean...

Past Annual Reporting

2020 | 20192018 [login required]