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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 29/07/2026

MEDDLE workshop in Auckland attached to the 6th International Coral Reef Symposium!

Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 01/06/2026

May 4-15, four of the COBS team led a MEDDLE experimental design workshop at CIBNOR (Centro de Investigaciones Biológicas del Noroeste) in La Paz, Mexico, combining MEDDLE with an experiment examining the effects of low pH on scallops during a simulated acute heatshock event.

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 22/05/2026

New paper out by COBS members on our resources for designing better multidriver studies! doi.org/10.1186/s444...

illustrations of different multiple driver experimental designs.

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 11/12/2025

The workshop is aimed at PhD students and ECRs new to multiple driver experiments, and is free but has limited spaces available.

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 11/12/2025

The COBS working group is offering an experimental design workshop before Ocean Sciences in Glasgow in Feb 2026! 🌊 Join us for a day of learning about designing and analysing multiple stressor experiments without getting multiply stressed out. forms.office.com/Pages/Respon...

Date and time: 9:00–15:30, Sunday, February 8, 2026

Location: University of Glasgow, room details TBA

Title of the event: Designing multiple driver experiments

Conveners: Sinéad Collins, University of Edinburgh, Simin Gao, University of Edinburgh, Paul Renaud, Akvaplan-niva

Description: The MEDDLE resources were developed to help researchers design and carry out tractable and comparable multiple driver experiments. In this workshop, participants will learn how to use these resources to design multiple driver experiments. While the concepts and methods discussed can apply to many systems, examples used during the workshop will focus on manipulative experiments rather than observational data.

The workshop is geared mainly towards PhD students, postdocs, and ECRs new to multiple driver research, and focuses heavily on the rationale of different experimental designs, and analysis strategies for multiple driver experiments. A basic working knowledge of statistics is needed (regression analysis), and statistical analysis examples will use R. Participants should bring a laptop with R and R studio installed.

Topics include:
• Defining a research question
• Identifying relevant drivers
• Identifying biological traits and responses
• Experimental designs for multiple driver experiments
• Statistical analysis plans

Hosted by the SCOR project “Changing Ocean Biological Systems”, this free workshop will be led by Sinéad Collins, University of Edinburgh (UK), Simin Gao, University of Edinburgh (UK), Paul Renaud, Akvaplan-niva (Norway). Spaces are limited. If you would like to attend, contact Sinéad Collins (s.collins@ed.ac.uk) by January 15, 2026 to register your interest. Limited to 24 people, so please register early!

Please include a brief (<150 words) statement outlining (a) your experience carrying out Ocean acidification or multiple driver experiments (if any) and (b) how you plan to incorporate multiple driver experiments into your work

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 03/09/2025

Enjoyed teaching this excellent group of young 🌊 oceanographers experimental design and data analysis! Our teaching team was @christinamcgraw.bsky.social, Peter Dillingham, Sam Dupont, @sineadcollins.bsky.social and @mridulkthomas.bsky.social Reach out if you'd be interested in these workshops!

Participants and teachers for a workshop on experimental design at the BECoME 2025 conference

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 15/07/2025

We will be teaching two free training courses at the BECoME-2025 conference in Hong Kong next month🌊 Course 1: Designing Multiple-Driver Experiments Course 2: Data Analysis for Multiple-Driver Experiments Join us! Apply through the conference website: www.become2025.com/registration

Training Course 1: Designing Multiple-Driver Experiments

BECoMe-2025 and SCOR’s Changing Ocean Biological Systems infrastructure group are hosting a free training course for researchers interested in learning how to design and carry out multiple-driver (i.e., multiple stressor) experiments that measure responses in microbes, plants, or animals. This training course will guide participants in using the MEDDLE resources to:

• Define a relevant research question
• Identify key drivers, biological traits, and responses
• Select an appropriate experimental design
• Develop a statistical analysis plan

Training Course Details

Time &Date: 9:30 am - 4:30 pm, 18 August 2025 (Monday)
Location: City University of Hong Kong
Participant Limit: 24 researchers (first-come, first-served)
Eligibility: Participants should have experience in designing and conducting single-driver experiments that study biotic responses (e.g. marine warming, ocean acidification).

Conveners: Christina McGraw, Sam Dupont, Sinéad Collins, Mridul K. Thomas, Peter Dillingham

Training Course 2: Data Analysis for Multiple-Driver Experiments

Researchers work hard to conduct interesting and challenging multi-driver experiments, but are often unaware of how best to analyse their data to take maximum advantage of these experiments. In this training course, participants will:

• Learn some of the common statistical challenges that appear in multi-driver experiments and how to solve them
• Work through an example R vignette for a multi-driver experiment
• Simulate an example dataset based on a proposed experiment
• Perform an appropriate analysis and visualise and interpret its output using “literate programming” via R markdown

Training Course Details

Time &Date: 9:30 am - 1:00 pm, 22 August 2025 (Friday)
Location: City University of Hong Kong
Participant Limit: 12 researchers (first-come, first-served)
Eligibility: Attendance at Training Course 1 (Designing Multiple-Driver Experiments) is required, as Training Course 2 builds directly on the concepts developed in the first training course. Participants should have experience with R and good knowledge of regression. Strong Python skills may also be considered, but Training Course 2 will be conducted using R.

Conveners: Peter Dillingham, Mridul K. Thomas, Sinéad Collins, Christina McGraw

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Reposted by Changing Ocean Biological Systems working group

Chris Cornwall @chrisecornwall.bsky.social · 02/07/2025

Check out some snaps from our recent MEDDLE workshop at #ITRS Brest, France on experimental design. Great participants! @scor-cobs.bsky.social

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 06/05/2025

We've written tutorials in R on how to analyse your experimental data. This includes how your experiment & analyses can be used to answer scientific questions and provide input into mathematical models. bsky.app/profile/scor...

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

Feedback welcome! We plan to update these, and to add more in the future.

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

7. Model-averaging, by Peter Dillingham: Explore how model-averaging enhances the analysis of multi-driver marine experiments with nested and crossed designs, using Arthrocardia under future ocean conditions as a case study:  nzoac.nz/s/Model-aver....

nzoac.nz

Model-averaging for experiments

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

6. Multiple driver response surfaces, by @mridulkthomas.bsky.social and @sineadcollins.bsky.social Learn 3 ways to analyse data from a temperature x nutrients response surface experiment, and use the output to understand where in the oceans the species does well. nzoac.nz/s/Response_s...

nzoac.nz

Fitting a response surface to data from multiple-driver experiments

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

5. Single-driver response curves, by @mridulkthomas.bsky.social and @sineadcollins.bsky.social Learn how to fit a temperature response curve to a simulated phytoplankton growth rate experiment. Then use the curve to learn about how the species performs across space & time. nzoac.nz/s/Single_dri...

nzoac.nz

Fitting a response curve (reaction norm) to data from single-driver experiments

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

4. Time-response variables, by Sam Dupont, Peter Dillingham & christinamcgraw.bsky.social Dive into modelling time-response data with R, using a sea urchin experiment to explore how environmental factors shape growth over time: nzoac.nz/s/Time_respo...

christinamcgraw.bsky.social

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

3. Blocking in time, by Steeve Comeau and @chrisecornwall.bsky.social Learn how to estimate the effects of two drivers on a response when your experiment is ‘blocked’ i.e. experimental units grouped in time, often because it’s not feasible to do all at once. nzoac.nz/s/Blocking_i...

nzoac.nz

Blocking in time

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

2. Analysing scenarios, by Steeve Comeau and @chrisecornwall.bsky.social Learn how to estimate the effects of two drivers on a response when your experimental treatments are designed to reflect future climate scenarios. nzoac.nz/s/Scenario_a...

nzoac.nz

Scenario approach

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

1. Statistical power, by Peter Dillingham: Explore how to use R's built-in functions and simulations to assess the statistical power of a study on sea urchin growth under changing ocean conditions. nzoac.nz/s/Power-vign...

nzoac.nz

Power calculation using built-in R functions or via simulation

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 28/04/2025

Ever wondered how to analyse your experimental data? 🌊🧪🌍 We’ve developed a series of tutorials in R to guide you through analysing & visualising data from single & multiple driver experiments. Beginners and experts, we've got something for all of you. Please share! meddle-scor149.org/vignettes/

meddle-scor149.org

Vignettes - Meddle

The MEDDLE data analysis tutorials illustrate statistical approaches for single and multiple driver experiments. The tutorials are not meant as an exhaustive list, nor do they replace formal statistic...

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 25/02/2025

We have a few slots free in our experimental design workshop at the International Temperate Reefs Symposium on June 30th in Brest, France 🌊 If you're attending the conference and are interested in honing your skills in climate change research/design, please sign up! itrs-home.org/designing-mu...

itrs-home.org

Designing multiple driver experiments – ITRS 2025

The MEDDLE resources were developed to help researchers design and carry out tractable, intercomparable multiple driver experiments. In this workshop, participants will learn how to use these…

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 12/12/2024

We are excited to host a virtual workshop about how to design & conduct multiple-driver experiments for Western Indian Ocean Marine Science Association researchers. blog.wiomsa.net/2024/12/11/v... Applications due 23 December! Contact @christinamcgraw.bsky.social for more information. 🌊

blog.wiomsa.net

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 02/12/2024

And Jason Hall-Spencer was at COP29, sharing insights on why the ocean is important for our future climate and therefore ongoing climate negotiations. www.linkedin.com/posts/plymou...

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 02/12/2024

Several of our members contributed to a couple of international meetings recently: The Sixth International Workshop on Bridging the Gap Between Ocean Acidification Impacts and Economic Valuation in Monaco, organised by the Centre Scientifique de Monaco and the IAEA.

Photo of COBS members and others at the Sixth International Workshop on Bridging the Gap Between Ocean Acidification Impacts and Economic Valuation in Monaco.

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 17/11/2024

We are leading workshops on designing multiple driver experiments, at upcoming seaweed and temperate reef conferences 🌊

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 15/11/2024

Thank you, and likewise! We are of course very interested in the tropics too, and had a meeting about coral reefs this past summer as well.

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 12/11/2024

We've written papers/guides about how to improve experimental design so that we learn more from experiments. We also teach workshops and build tools based on these principles. 🌊 onlinelibrary.wiley.com/doi/10.1111/... www.sciencedirect.com/science/arti... www.annualreviews.org/content/jour...

onlinelibrary.wiley.com

Experimental strategies to assess the biological ramifications of multiple drivers of global ocean change—A review

Marine life is controlled by multiple physical and chemical drivers and by diverse ecological processes. Many of these oceanic properties are being altered by climate change and other anthropogenic p...

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 12/11/2024

Thanks for this, David. Could you add us to the list as well?

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 12/11/2024

Hello all! We're a working group studying how interacting drivers (or "multiple stressors") like temperature, acidification, etc. shape marine life. Follow us for new research and workshops, as well as tools to improve experimental design, data analysis, mathematical models, and more. 🌊

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Changing Ocean Biological Systems working group @scor-cobs.bsky.social · 12/11/2024

Hi David - could you please add us to the feed? Thanks!

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