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Posts by Alex Courtiol ๐Ÿ˜๐Ÿฆ‡๐Ÿฆ…๐Ÿ‘จโ€๐Ÿ’ป

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Led by Viktoriia Radchuk, an international collaboration shows phenological shifts in response to changing temperatures allow populations to remain stable or even increase in numbers.
Support from #sDiv @idiv-research.bsky.social

2 months ago 31 17 1 6
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Sebastiรฃo Salgadoโ€™s impressive photos: This was Brazilโ€™s largest & most dangerous gold mine Salgadoโ€™s Serra Pelada Serra Pelada is a series of photographs taken in 1986 depicting endless numbers of mine workers distributed on various parts of aโ€ฆ

- 3. gold: publicdelivery.org/sebastiao-sa...

Feel free to link to others!!

8 months ago 0 0 0 0
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The Dramatic Impact of Illegal Amber Mining in Ukraineโ€™s Wild West A chaotic scene in Ukraine has miners pitted against each other and the government, often with deadly consequences and significant environmental harm.

- 2. amber: www.nationalgeographic.com/history/article/illegal-amber-mining-ukraine

8 months ago 0 0 1 0
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The Mammoth Pirates In Russia's Arctic north, a new kind of gold rush is under way.

Enjoying my low carbon footprint form of travel toward #ecobhvr2025, I am re-reading some accounts of environmental/societal destruction caused by the extraction of rare natural products that dazzle most of us...

My selection of illustrated stories:
- 1. mammoth ivory: www.rferl.org/a/the-mammot...

8 months ago 1 0 1 0

It turns out that since the 2 legs (Berlin -> Paris and Paris -> Montpellier) had not been purchased together, the SNCF could not put me up in an hotel at their own cost. They did, after a smile, gave me a free 1st class ticket for the next day, so I am now in a fast train towards Montpellier ๐Ÿ›ค๏ธ

8 months ago 0 0 0 0

It looks like that the direct train between Berlin and Paris is so delayed that I will miss my connection to the night train... So I'll spent a night in Paris, exciting... The adventure continues. #SlowTravel & #SustainableTravel to #ecobhvr2025!!

8 months ago 0 0 0 0
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Just boarded a train with my bike in Berlin. If all goes smoothly I should reach Montpellier within 21 hours, with plenty of time before the launch of #ecobhvr2025. Only one change in Paris... So, time to unpack the laptop and check my slides (perhaps after an episode of Wednesday #2...).

8 months ago 3 0 2 0
The Anti-Autocracy Handbook: A Scholars' Guide to Navigating Democratic Backsliding The Anti-Autocracy Handbook is a call to action, resilience, and collective defence of democracy, truth, and academic freedom in the face of mounting authoritarianism. It tries to provide guidance to ...

I have just read the Anti-Autocracy Handbook and I think everyone else should too:
sks.to/autocracy
Thanks to @lewan.bsky.social and others for putting this together!!

9 months ago 11 5 0 0
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9 months ago 3 0 0 0
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using R & Rstudio using podman.md GitHub Gist: instantly share code, notes, and snippets.

I just wrote a tutorial about how to use #Rstats & RStudio using a container system (podman): gist.github.com/courtiol/ce0...
I did this for myself (a linux user), but it may be useful to others too.
Let me know what you think of it.

10 months ago 4 0 0 0
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Do Spix's macaws really behave as they do in the animated films Rio? To find out, read our new preprint: doi.org/10.1101/2025...

11 months ago 1 0 0 0
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Shorter and Warmer Winters Expand the Hibernation Area of Bats in Europe Our study pioneers a methodology integrating empirical physiology measurements with climate models, enabling accurate predictions of the distribution of hibernating animals under projected climate ch....

Our paper on how climate change impacts bat hibernation is out๐ŸŽ‰ It was a long journey paved with many desk rejections despite a huge amount of work put in collecting and analysing the data, but we are proud of the result and very happy with the one journal that did review it: doi.org/10.1111/ele....

11 months ago 1 1 0 0
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who-protects-the-ocean formr survey framework. chain simple surveys into long runs, use the power of R to generate pretty feedback and complex designs

The survey link: workforce-survey.marine-conservation.org/who-protects...

11 months ago 0 0 0 0
MPA Workforce Study 2025 โ€” Overview | ๐ŸŒŠeOceansยฎ๐Ÿฆ€
MPA Workforce Study 2025 โ€” Overview | ๐ŸŒŠeOceansยฎ๐Ÿฆ€ YouTube video by eOceans

Working in or with Marine Protected Areas?๐ŸŒŠ
We need your help! In this video, Christine Ward-Paige, introduces our workforce survey:
youtu.be/M3Nm5KuyN_Q?...
This is an effort involving Blue Nature Alliance, MCI, IUCN, @rewildorg.bsky.social, Leibniz-IZW and others.
Please share!!

11 months ago 1 0 1 0
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Breeding site fidelity in the concrete jungle: implications for the management of urban mallards Abstract. Understanding the selection of breeding sites in cities is key for the effective management of urban bird populations. We analysed 16โ€‰years of da

Our paper on ducks in the city is out! Using 16 yrs of data (>1000 breeding events) collected by NABU Berlin (berlin.nabu.de), we looked at why many ducks nest on buildings. The landscape doesn't matter much, it's more an individual choice and the appeal of the breeding site: doi.org/10.1093/jue/...

1 year ago 1 0 0 0
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Yes, strict double blind requirements from the journal.

1 year ago 0 0 0 0

Anonymizing an #rstats ๐Ÿ“ฆ for a submission to Methods in Eco Evo, I replaced names in DESCRIPTION, README, vignettes, doc... But calling packageDescription("pkg.tar.gz") revealed that the computer name is used as metadata ๐Ÿคจ
Solution: build your tar.gz in a terminal using R CMD build --user=anonymous

1 year ago 3 0 1 0

Done! I reworked the filters and reduced the rate of both false positives and false negatives. It should now catch your pics @matkempphotos.bsky.social

1 year ago 1 0 1 0

Na, to find wildlife pics I should make sure that #wildlifephotography is enough. I personally like the combo ๐Ÿชถ๐Ÿ“ท as it is short and pertinent albeit bird biased.

1 year ago 1 0 1 0

To repost wildlife pics I simply detect messages with at least one element among "#photography #picture #pics #camera ๐Ÿ“ท ๐Ÿ“ธ ๐Ÿ–ผ๏ธ" AND one among "#wildlife #bird #animal ๐Ÿชถ". I also try to remove messages with keywords that tend to be associated with false positives. These rules could be expanded!

1 year ago 2 0 1 0

What do you call usual? Using c_across? If so, lay runs much faster. Check the vignette or README on GitHub.

1 year ago 0 0 0 0
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Landed in Budapest. About to spend a week with the Finnish national team of horseback archery! ๐Ÿน๐Ÿด๐Ÿ‡ซ๐Ÿ‡ฎ

1 year ago 1 0 0 0
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Effects of environmental change on population growth: monitoring time-varying carrying capacity in free-ranging spotted hyenas bioRxiv - the preprint server for biology, operated by Cold Spring Harbor Laboratory, a research and educational institution

Why a growing population is not necessary a sign of its environment getting better?
Check out our latest preprint:
doi.org/10.1101/2024...
-> huge amount of work from former postdoc Liam Bailey, now data wizard for WWF.
It is also the result of the amazing data collected by hyena-project.com

1 year ago 1 1 0 0
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I've just created a feed called "wildlife photography".
It catches posts with pictures that are about wildlife through a collection of hashtags that I will continuously refine to improve the feed.
It was easy thanks to skyfeed.app
Please pin/save and let me know what you think.
#wildlifephotography

2 years ago 2 0 1 0
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I took that photo in Tokyo (Higashi-Yukigaya 2002). The birds sometimes install such nests on power lines of Japan Railways and need to be removed in order to avoid power outages.

2 years ago 43 10 4 1

If people wonder why {terra} and not {stars}. My main answer would be that all plotting functionalities of the #rstats ๐Ÿ“ฆ IsoriX are based on {lattice} via {rasterVis}. The latter ๐Ÿ“ฆ now handles {terra} objects very well. Had I switched to {stars}, all plotting functions would have had to be recoded.

2 years ago 0 0 0 0

Without {raster}, the #rstats ๐Ÿ“ฆ IsoriX lost the ability to store objects it creates as binaries. So I had to implement S3 & S4 methods for that, building on {terra}'s wrapping functionalities. I also discovered that `raster::aggregate` and `terra::aggregate` have different default `na.rm` behaviour.

2 years ago 2 0 0 0

I thought that the transition would be trivial, but it turned out not to be. Without {sp}, IsoriX initially lost the ability to plot oceans, which are polygons with holes (i.e. polypaths). So we had to add this feature in #rstats ๐Ÿ“ฆ {lattice} and {rasterVis}, which IsoriX uses.
More ๐Ÿ‘‡

2 years ago 0 0 2 0

IsoriX v0.9.2 -- an #rstats ๐Ÿ“ฆ for building isoscapes using mixed models and inferring the geographic origin of samples based on their isotopic ratios -- is now on CRAN.
The main change between v0.9.1/v0.9.2 and earlier versions is that it no longer imports {raster} & {sp}, but {terra}.
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2 years ago 1 0 1 0

You should not decide based on the effect sizes but on how well it fits. If you impose a continuous effect, it can indeed artificially increase effect sizes if the real effect is not linear. Then the predict functions can sample different values along the continuum, hence your problem. -> factor

2 years ago 2 0 0 0