Autumn 2026
 
The International Biogeography Society Newsletter
News from the Board...
-Nicholas Gotelli
TIBS President-Elect
 

In-person TIBS meetings are the primary way that our members meet and interact, but TIBS is also interested in promoting additional connections through on-line training courses and discussion fora.

TIBS has a tradition of offering remote and in-person training courses. They are an opportunity to learn and refine new research tools, especially for computational work. The discussion fora are a new undertaking for TIBS. They are an opportunity for a free-flowing conversation about topics that are of general interest to the membership.

During the next year, we are excited to be offering three computational training courses:

Strategic coding practices: reproducible coding for large open-ended projects.
Dr. Nicholas J. Gotelli
14 - 15 October 2026
 
Take your species distribution models to the next level with Bayesian non-parametric regression trees.
Dr. A. Márcia Barbosa
15 - 17 December 2026
 
Beyond binary maps: fuzzy logic for threshold-free estimates of diversity, similarity and change.
Dr. A. Márcia Barbosa
16 - 17 February 2027

Please see further details for these training courses in this issue of the newsletter. We are keeping costs to a minimum and giving first access to TIBS members. Attendance is limited, so reserve your place now for these rewarding training courses.

The TIBS board is also pleased to introduce new discussion fora as a way to connect our membership for stimulating discussions. The topic of our first discussion forum will be:

Strategies for Successful Publication in Peer-Reviewed Journals.
Hosts: TIBS board members
November 12th 2026

We are excited to present this open discussion forum that will draw on the collective expertise of the TIBS board, whose members have worked as editors and reviewers for a variety of journals in biogeography and macroecology.

We sincerely hope you will join us for one or more of these training courses and discussion fora offered by TIBS!

GET INVOLVED
Online Training Courses
and Discussion Fora
Discussion Forum
Strategies for Successful Publication
in Peer Reviewed Journals

Moderator: Nick Gotelli
Panelists: Ulises Balza, Andressa Cabral, Simon Darroch, Marta Jarzyna, Mark Lomolino, Pablo Marquet, Toby Pennington, Susanne Renner, Alexandria Shupinski

Date: Thursday, November 12, 16:00 UTC

Description:
Peer-reviewed publications are an essential element for success in the sciences. How can you improve your chances of success when you submit your manuscript? Collectively, the entire TIBS board has decades of experience as Editors, Associate Editors, Subject Matter Editors, Reviewers, and Authors for a range of journals that publish papers in biogeography and macroecology. We want to share our suggestions and experiences with you to help you improve your submissions. We will have an open discussion to answer your questions, which you can submit anonymously before the meeting or ask during the discussion.

Potential topics we will cover include:
  • Pipeline and Timeline For Peer-Reviewed Journals
  • Selecting A Journal
  • The Importance Of The Abstract, Cover Letter, and Suggested Reviewers
  • Formatting And Preparing Your Manuscript
  • Dealing With Reviewer Criticisms
  • The Future Of Peer-Reviewed Publications
Open to all participants and free to TIBS members.
Fees
TIBS members: Free; registration is open now!
Non-members: $10USD; registration is open now!

Training Course
Strategic Coding Practices: Reproducible Coding For Large Open-Ended Projects

Moderator: Dr. Nicholas J. Gotelli

Dates
Day 1: Wednesday, October 14, 14:00-16:00 UTC + 17:00–19:00 UTC
Day 2: Thursday, October 15, 14:00-16:00 UTC

Description:
Most researchers know how to write a script of computer code to execute a relatively simple set of instructions. But this kind of coding quickly becomes slow, inefficient, and not reproducible for real-world projects, which may have many different data sets and interacting components. This workshop will teach you how to structure and organize your code into modular units that are flexible and easy to use, no matter how large or complex your project eventually becomes. Although the workshop is taught in R, the principles can and should be applied when working with any scripting language. This strategy of high-level coding is pre-adapted for working with AI: you can “code” the project, and AI can “write the code” for your functions. Although we will be doing a modest amount of coding in the workshop, participants could still get a lot of benefit from the presentation just from listening; doing the in-workshop coding is not essential for learning the basic approach.
  • Format: Remote, with live coding exercises using the RStudio platform
  • Expected Background: Moderate skill in R coding using the RStudio editor
  • Required: Personal computer (Linux, Windows, or Mac OS) with current versions of R and RStudio; internet access
  • Total time: 6 hours spread over two days
  • Maximum attendees: 50
Fees
TIBS members: $20USD; registration is open now!
Non-members: $70USD; registration is open now!

Training Course
Take your species distribution models to the next level with Bayesian non-parametric regression trees

Moderator: Dr A. Márcia Barbosa

Dates:
Day 1: Tuesday, December 15, 14:00-16:30 UTC
Day 2: Wednesday, December 16, 14:00-16:30 UTC
Day 3: Thursday, December 17, 14:00-16:30 UTC

Description:
Bayesian Additive Regression Trees (BART) are a powerful machine learning technique with very promising applications in ecology and biogeography in general, and in species distribution modelling (SDM) in particular. BART can produce highly accurate predictions without overfitting to noise or to particular cases in the data. Notably, unlike most SDM methods, BART generally shows a well-balanced performance regarding both main aspects of predictive accuracy: discrimination (i.e., distinguishing presence from absence localities) and calibration (i.e., having predicted probabilities reflect gradual occurrence frequencies across space and environment). Moreover, the Bayesian framework inherently handles prediction uncertainty, and it has a built-in complexity penalty with very sensible defaults, freeing the user from arbitrary or intensively cross-validated parameter choices. This workshop will take participants through a worked example, from essential data preparation to model output analysis, using sample data and annotated R scripts. These scripts can be adapted on-the-spot by participants to work on any species’ presence-only (e.g. from GBIF) or presence-(pseudo)absence data and predictor variables (but mind that computation time can be very large for large datasets). We’ll prepare species occurrence and environmental data, compute and evaluate BART distribution models, identify influential predictors, map prediction uncertainty, plot partial response curves with Bayesian credible intervals, and map relative presence probability regarding particular predictors. All sessions include both theoretical lectures and hands-on practice with R.
  • Format: Live online lessons on Zoom, with a Slack space for workshop materials, questions and discussion.
  • Expected Background: This workshop requires familiarity with R at the user level; Basic knowledge about species distribution (or ecological niche) models.
  • Required: A computer with recent versions of R, RStudio, and R packages ‘embarcadero’ and ‘terra’ already installed; A good enough internet connection for live video sessions, and preferably a webcam for enhanced interactivity.
  • Total time: 7.5 hours spread over three days
  • Maximum attendees: 20
Fees
TIBS members: $80USD; registration is open now!
Non-members: $120USD; registration opens November 1.

Training Course
Beyond binary maps: fuzzy logic for threshold-free estimates of diversity, similarity and change

Moderator: Dr A. Márcia Barbosa

Dates
Day 1: Tuesday, February 16, 14:00-16:30 UTC
Day 2: Wednesday, February 17, 14:00-16:30 UTC

Description:
Species have continually changing distributions, and they occur with varying frequency across space. Categorical occurrence maps, whether observed or model-derived, are thus incomplete and oversimplified representations of species’ actual distributions. Moreover, categorical occurrence derived from model predictions normally relies on largely arbitrary but outcome-determining user-specified thresholds. Analyses that build on such categorical maps, such as most indices of diversity, overlap, (dis)similarity and change, thus omit important gradations in species occurrence and can be visibly conditioned by threshold choice. Fuzzy logic is a simple tool to eliminate the need for such thresholds and formally incorporate the location uncertainty and gradual variations that characterize natural biodiversity patterns. This workshop will show how fuzzy logic can be easily integrated into biogeographical analyses to improve the depiction and combination of species distribution patterns, with applications in macroecological interactions, global change, biotic regionalization and other biodiversity studies.

We will use presence-(pseudo)absence models that produce presence probability values (e.g. generalized linear and generalized additive models; tree-based classification and regression methods), which can be converted to favourability or fuzzy membership values. We will see how these values allow direct comparison and combination of gradual distribution patterns across species, regions and time periods; and how common indices of diversity, overlap and (dis)similarity can also be generalized to work with fuzzy (degree of) occurrence values. This allows the use of presence probability models without depending on thresholds to force them into binary predictions, thus avoiding the compounded effects of threshold choice on results and conclusions.

The workshop includes concise theoretical lessons explaining the concepts behind the described procedures, and practical hands-on sessions where participants put these procedures into practice using R. Note that we will not cover data preparation and model building; We will provide some already-made species distribution models as examples for participants to work with. Participants are also encouraged to bring their own presence-(pseudo)absence data and presence probability predictions, for different (ecologically related) species or time periods.
  • Format: Live online lessons on Zoom, with a Slack space for workshop materials, questions and discussion.
  • Expected Background: This workshop requires familiarity with R at the user level and basic knowledge about species distribution (or ecological niche) models.
  • Required: A computer with recent versions of R, RStudio, and R packages ‘fuzzySim’ and ‘terra’ already installed; A good enough internet connection for live video sessions, and preferably a webcam for enhanced interactivity.
  • Total time: 5 hours spread over two days
  • Maximum attendees: 20
Fees
TIBS members: $80USD; registration is open now!
Non-members: $120USD; registration opens November 1.

UPCOMING EVENTS
Funk Biogeography Seminar Series:
October 28, 2026
The next Funk Biogeography Seminar will take place on October 28! Our speaker this month is Dr. I-Ching Chen from the National Cheng Kung University, Taiwan.

More details will be coming soon!
 

Look ahead at our last speaker for 2026:
November 18
University of Montréal, Canada

Mark your calendars! November's seminar is a week earlier than usual to avoid conflicts with American Thanksgiving.

HIGHLIGHTED PAPER
The potential of sedimentary ancient DNA to increase understanding of island ecosystem dynamics.
 
Xaali O'Reilly Berkeley - Postdoctoral Researcher

Universitat Autònoma de Barcelona &
Centre de Recerca Ecològica i Aplicacions Forestals
About the study: Sedimentary ancient DNA (sedaDNA) is being increasingly used to reconstruct past ecosystems. However, we found sedaDNA has been sampled from only a handful of islands worldwide and that these were mostly arctic. We crossed a plant DNA reference database with the known flora of archipelagos across the globe, the results of which suggest there is good potential of identifying island flora from sedaDNA where quality DNA can be obtained. Additionally, we used a case study from Iceland to illustrate what information can be obtained when reference databases are exhaustive and DNA quality is good.

What do you consider to be the most significant finding of this study?
"The most significant result of our study is that the DNA reference database for the chloroplast trnL (UAA) intron – which is used for metabarcoding and identifying plant ancient DNA – has surprisingly good coverage on islands worldwide at genus level. This suggests that we can potentially obtain high resolution palaeoecological vegetation data from sedaDNA, which is currently largely lacking for islands outside the Arctic."
 
What was the most surprising result?
"The coverage of the the trnL reference database is surprising because we expected that the flora of tropical islands would be poorly represented. However, it is worth cautioning that although coverage at the genus level was high worldwide, this could still hide much intrageneric diversity on islands where species radiations have occurred. It is also worth pointing out that the representation of genera or species in the reference database does not mean that the sequences were obtained from an island, but could have been sampled from a mainland specimen. Inevitably, the island flora database (GIFT) that we used had some gaps, though we are convinced that we used the most complete global database available."
 
Why are you particularly interested in this group of organisms?
"We focused our reference database analysis and case study (largely) on plants. This was partly because they are the most extensively studied group in sedaDNA research, as indicated by the literature review in the first part of the paper. Additionally, the composition of vegetation provides a more complete picture of a terrestrial habitat than do animal or microbial communities."
Lake Torfdalsvatn, Iceland, the location of the paper's case study.
Image credit: Nordic Adventure Travel.
 
What led you to this study, and did the direction of the project change as it progressed?
"This study began with discussions about how sedaDNA could help answer long-standing questions in island biogeography. Sandra Nogué and Inger G. Alsos realised that although sedimentary ancient DNA was rapidly advancing elsewhere, its potential for island research had never been synthesised. Our original goal was to review the field, but the project soon evolved into a broader assessment of global opportunities and challenges."
 
What was the most challenging problem you had to solve?
"The most challenging problem was convincing ourselves that our methodology was rigorous enough to draw our conclusions regarding the reference database coverage. However, we reviewed and repeated the comparisons several times with the same result. As mentioned, we also checked how complete the flora database we used was and did find some discrepancies with other existing local floras but concluded that at the global scale we worked at, GIFT is the most complete database we could have used."
 
How does this work fit into your broader research interests?
"Before this project, my background was in contemporary environmental DNA (eDNA) and community genetics. The chance to work with ancient eDNA from sediments, in other words sedaDNA, combined my expertise in eDNA and my long held interest in palaeoecology. The idea that we can go back so far in time with what is essentially a type of eDNA was one that fascinated me and so I leapt at the opportunity."
 
How did this collaboration among the authors come about?
"I came onto this project as a postdoctoral researcher, working with Sandra Nogué at the Universitat Autònoma de Barcelona and Inger G. Alsos of the Arctic University Museum of Norway. One of our aims was to evaluate how well DNA reference databases cover island floras worldwide. This required a global inventory of island plant species, which brought together the co-authors who had developed and curated these datasets. The collaboration was built on the complementary expertise of the team and a shared interest in advancing the study of island biodiversity through better data and research tools."
 
What are you working on next?
"Since my postdoctoral position came to an end, I have been working on project proposals to continue working with sedaDNA to answer ecological questions. Understanding the past will be essential to understand where contemporary ecosystems are heading under future climate change and continued human impacts."

Opportunities
 
Get involved with TIBS and find out about other opportunities in the world of biogeography!
International Congress for Conservation Biology (ICCB) 2027
ICCB 2027 will feature over 140 sessions during the main scientific program, including symposia, contributed sessions, poster sessions, and plenary talks. ICCB will also host a variety of pre-congress workshops, training sessions, and round table discussions.

The Society for Conservation Biology will be opening their call for abstracts for ICCB2027 soon!

Keep an eye on the ICCB webpage!
 

Looking for a place to share your work in biogeography?
PUBLISH WITH US!
 
Frontiers of Biogeography is the journal of
The International Biogeography Society.
 
All taxa and all branches
of biogeography are welcome.
 
Visit biogeography.pensoft.net
to view more articles!
 
International - Peer reviewed - Open access - 2.4 Impact factor