Ecological network flavors: many-to-many, few-to-many, and few-to-many spatially

Recent conference attendance inspired me to do a quick typology of networks that were presented in various talks. All were done in R using a few different packages.
All were interested in diversity patterns.
None were food webs.


many-to-many: many plant species and many pollinators for instance

few-to-many: mapping the associated set of pollinators to one flowering species

few-to-many: replicated mapping of diversity for one taxa to a single species of another either nested or spatially contrasted.


Network analyses are amazing. I need to learn more!

Can you also map interactions onto other interactions?



Fix-it Facilitation: additional resources

A super fun process exploring how empirical contributions can reshape and embrace theory by addressing gaps in better designs and clear interpretations of findings.

Fix-it Felix: advances in testing plant facilitation as a restoration tool in Applied Vegetation Science.

The original contribution was longer with a more complete set of resources. Here is the full citation list that framed and supported the story and discussion.

Literature cited

Badano, E.I., Bustamante, R.O., Villarroel, E., Marquet, P.A. & Cavieres, L.A. 2015. Facilitation by nurse plants regulates community invasibility in harsh environments. Journal of Vegetation Science: 756-767.

Badano, E.I., Samour-Nieva, O.R., Flores, J., Flores-Flores, J.L., Flores-Cano, J.A. & Rodas-Ortíz, J.P. 2016. Facilitation by nurse plants contributes to vegetation recovery in human-disturbed desert ecosystems. Journal of Plant Ecology 9: 485-497.

Barney, J.N. 2016. Invasive plant management must be driven by a holistic understanding of invader impacts. Applied Vegetation Science 19: 183-184.

Bertness, M.D. & Callaway, R. 1994. Positive interactions in communities. Trends in Ecology and Evolution 9: 191-193.

Bronstein, J.L. 2009. The evolution of facilitation and mutualism. Journal of Ecology 97: 1160-1170.

Bruno, J.F., Stachowicz, J.J. & Bertness, M.D. 2003. Inclusion of facilitation into ecological theory. Trends in Ecology and Evolution 18: 119-125.

Bulleri, F., Bruno, J.F., Silliman, B.R. & Stachowicz, J.J. 2016. Facilitation and the niche: implications for coexistence, range shifts and ecosystem functioning. Functional Ecology 30: 70-78.

Callaway, R.M. 1998. Are positive interactions species-specific? Oikos 82: 202-207.

Chamberlain, S.A., Bronstein, J.L. & Rudgers, J.A. 2014. How context dependent are species interactions? Ecology Letters 17: 881-890.

Filazzola, A. & Lortie, C.J. 2014. A systematic review and conceptual framework for the mechanistic pathways of nurse plants. Global Ecology and Biogeography 23: 1335-1345.

Gomez-Aparicio, L., Zamora, R., Gomez, J.M., Hodar, J.A., Castro, J. & Baraza, E. 2004. Applying plant facilitation to forest restoration: a meta-analysis of the use of shrubs as nurse plants. Ecological Applications 14: 1128-1138.

Holmgren, M. & Scheffer, M. 2010. Strong facilitation in mild environments: the stress gradient hypothesis revisited. Journal of Ecology 98: 1269-1275.

James, J.J., Rinella, M.J. & Svejcar, T. 2012. Grass Seedling Demography and Sagebrush Steppe Restoration. Rangeland Ecology & Management 65: 409-417.

Lortie, C.J., Filazzola, A., Welham, C. & Turkington, R. 2016. A cost–benefit model for plant–plant interactions: a density-series tool to detect facilitation. Plant Ecology: 1-15.

Macek, P., Schöb, C., Núñez-Ávila, M., Hernández Gentina, I.R., Pugnaire, F.I. & Armesto, J.J. 2017. Shrub facilitation drives tree establishment in a semiarid fog-dependent ecosystem. Applied Vegetation Science.

Malanson, G.P. & Resler, L.M. 2015. Neighborhood functions alter unbalanced facilitation on a stress gradient. Journal of Theoretical Biology 365: 76-83.

McIntire, E. & Fajardo, A. 2011. Facilitation within species: a possible origin of group-selected superoorganisms. American Naturalist 178: 88-97.

McIntire, E.J.B. & Fajardo, A. 2014. Facilitation as a ubiquitous driver of biodiversity. New Phytologist 201: 403-416.

Michalet, R., Brooker, R.W., Cavieres, L.A., Kikvidze, Z., Lortie, C.J., Pugnaire, F.I., Valiente‐Banuet, A. & Callaway, R.M. 2006. Do biotic interactions shape both sides of the humped‐back model of species richness in plant communities? Ecology Letters 9: 767-773.

Michalet, R., Le Bagousse-Pinguet, Y., Maalouf, J.-P. & Lortie, C.J. 2014. Two alternatives to the stress-gradient hypothesis at the edge of life: the collapse of facilitation and the switch from facilitation to competition. Journal of Vegetation Science 25: 609-613.

Noumi, Z., Chaieb, M., Michalet, R. & Touzard, B. 2015. Limitations to the use of facilitation as a restoration tool in arid grazed savanna: a case study. Applied Vegetation Science 18: 391-401.

O’Brien, M.J., Pugnaire, F.I., Armas, C., Rodríguez-Echeverría, S. & Schöb, C. 2017. The shift from plant–plant facilitation to competition under severe water deficit is spatially explicit. Ecology and Evolution 7: 2441-2448.

Pescador, D.S., Chacón-Labella, J., de la Cruz, M. & Escudero, A. 2014. Maintaining distances with the engineer: patterns of coexistence in plant communities beyond the patch-bare dichotomy. New Phytologist 204: 140-148.

Rydgren, K., Hagen, D., Rosef, L., Pedersen, B. & Aradottir, A.L. 2017. Designing seed mixtures for restoration on alpine soils: who should your neighbours be? Applied Vegetation Science.

Sheley, R.L. & James, J.J. 2014. Simultaneous intraspecific facilitation and interspecific competition between native and annual grasses. Journal of Arid Environments 104: 80-87.

Silliman, B.R., Schrack, E., He, Q., Cope, R., Santoni, A., van der Heide, T., Jacobi, R., Jacobi, M. & van de Koppel, J. 2015. Facilitation shifts paradigms and can amplify coastal restoration efforts. Proceedings of the National Academy of Sciences 112: 14295-14300.

Stachowicz, J.J. 2001. Mutualism, facilitation, and the structure of ecological communities. Bioscience 51: 235-246.

von Gillhaussen, P., Rascher, U., Jablonowski, N.D., Plückers, C., Beierkuhnlein, C. & Temperton, V.M. 2014. Priority Effects of Time of Arrival of Plant Functional Groups Override Sowing Interval or Density Effects: A Grassland Experiment. PLoS ONE 9: e86906.

Went, F.W. 1942. The dependence of certain annual plants on shrubs in southern California deserts. Bulletin of the Torrey Botanical Club 69: 100-114.

Xiao, S. & Michalet, R. 2013. Do indirect interactions always contribute to net indirect facilitation? Ecological Modelling 268: 1-8.

Why read a book review when you you can read the book (for free via #oa #openscience)?


Reviews, recommendations, and ratings are an important component of contemporary online consumption. Rotten Tomatoes, Metacritic, and reviews and recommendations increasingly shape decisions. Science and technical books are no exception. Increasingly, I have checked reviews for a technical book on a purchasing site even before I downloaded the free book. Too much information, not too little informs many of the competing learning opportunities (#rstats ) for instance).  I used to check the book reviews section in journals and enjoyed reading them (even if I never read the book). My reading habits have changed now, and I rarely read sections from journals and focus only on target papers. This is an unfortunate. I recognize that reviews are important for many science and technical products (not just for books but packages, tools, and approaches). Here is my brief listicle for why reviews are important  for science books and tools.

benefit description
curation Reviews (reviewed) and published in journals engender trust and weight critique to some extent.
developments and rate of change A book review typically frames the topic and offering of a book/tool in the progress of the science.
deeper dive into topic The review usually speaks to a specific audience and helps one decide on fit with needs.
highlights The strengths and limitations of offering are described and can point out pitfalls.
insights and implications Sometimes the implications and meaning of a book or tool is not described directly. Reviews can provide.
independent comment Critics are infamous. In science, the opportunity to offer praise is uncommon and reviews can provide balance.
fits offering into specific scientific subdiscpline Technical books can get lost bceause of the silo effect in the sciences. Reviews can connect disciplines.

Here is an estimate of the frequency of publication of book reviews in some of the journals I read regularly.

journal recent
American Naturalist 12967 9
Conservation Biology 1327 74
Journal of Applied Ecology 270 28
Journal of Ecology 182 0
Methods in Ecology & Evolution 81 19
Oikos 211 22

Details of journal data scrape here:


A good novel tells us the truth about its hero; but a bad novel tells us the truth about its author.

–Gilbert K. Chesterton

Tips for rapid scientific recordings


If a picture is worth a thousand words, a video is worth 1.8 million words. Like all great summary statistics, this has been discussed and challenged (Huffington Post supporting this idea and a nice comment at Replay Science reminding the public it is really a figure of speech).

Nonetheless, short scientific recordings, posted online are an excellent mechanism to put a face to a name, share your inspirations in science, and provide the public with a sense of connection to scientists. It is a reminder that people do science and that we care. I love short videos that provide the viewer with insights not immediately evident in the scientific product. Video abstracts with slide decks are increasingly common. I really enjoy them. However, sometimes I do not get to see what the person looks like (only the slide deck is shown) or how they are reacting/emoting when they discuss their science. Typically, we are not provided with a sense why they did the science or why they care. I think short videos that share a personal but professional scientific perspective that supplements the product is really important. I can read the paper, but if clarifications, insights, implications, or personal challenges in doing the research were important, it would be great to hear about them.

In that spirit, here are some brief suggestions for rapid scientific communications using recordings.


  1. Keep the duration at less than 2 minutes. We can all see the slider at the bottom with time remaining, and if I begin to disconnect, I check it and decide whether I want to continue. If it is <2mins, I often persist.
  2. Use a webcam that supports HD.
  3. Position the webcam above you facing down. This makes for a better angle and encourages you to look up.
  4. Ensure that you are not backlit. These light angles generally lead to a darker face that makes it difficult for the viewer to see any expressions at all.
  5. Viewers will tolerate relatively poor video quality but not audio. Do a 15 second audio test to ensure that at moderate playback volumes you can be clearly understood.
  6. Limit your message to three short blocks of information. I propose the following three blocks for most short recordings. (i) Introduce yourself and the topic. (ii) State why you did it and why you are inspired by this research. (iii) State the implications of the research or activity. This is not always evident in a scientific paper for instance (or framed in a more technical style), and in this more conversational context, you take advantage of natural language to promote the desired outcome.
  7. Prep a list of questions to guide your conversation. Typically, I write up 5-7 questions that I suspect the audience might like to see addressed with the associated product/activity.
  8. Do not use a script or visual aids. This is your super short elevator pitch. Connect with the audience and look into the camera.
  9. Have a very small window with the recording on screen, near the webcam position, to gently self-monitor your movement, twitches, and gestures. I find this little trick also forces me to look up near the webcam.
  10. Post online and use social media to effectively frame why you did the recordings. Amplify the signal and use a short comment (both in the YouTube/Vimeo field) and with the social media post very lightly promoting the video.

Happy rapid recording!

A set of #rstats #AdventureTime themed #openscience slide decks


I recently completed a set of data science for biostatistics training exercises for graduate students. I extensively used R for Data Science and Efficient R programming to develop a set of Adventure Time R-statistics slide decks. Whilst I recognize that they are very minimal in terms of text, I hope that the general visual flow can provide a sense of the big picture philosophy that R data science and R statistics offer contemporary scientists.

Slide decks

  1. WhyR? How tidy data, open science, and R align to promote open science practices.
  2. Become a data wrangleR. An introduction to the philosophy, tips, and associated use of dplyr.
  3. Contemporary data viz in R. Philosophy of grammar of graphics, ggplot2, and some simple rules for effective data viz.
  4. Exploratory data analysis and models in R. An explanation of the difference between EDA and model fitting in R. Then, a short preview of how to highlighting modelR.
  5. Efficient statistics in R. A visual summary of the ‘Efficient R Programming’ book ideas including chunk your work, efficient planning, efficient planning, and efficient coding suggestions in R.

Here is the knitted RMarkdown html notes from the course too, and all the materials can be downloaded from the associated GitHub repo.

I hope this collection of goodies can be helpful to others.