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Nathan Chrismas

@thevagrantlichenologist.com
750 followers 559 following 134 posts

Lichenologist - FRGS - Mountain Leader Working with NTS and RBGE Blog: www.thevagrantlichenologist.com Insta: www.instagram.com/cragology/ Web: www.cragology.rocks

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Nathan Chrismas @thevagrantlichenologist.com · 28/09/2026
Our new short comm introducing Ochrolechia frigida as a system for studying lichen symbiont dynamics is online now in The Lichenologist @lichenologist.bsky.social www.cambridge.org/core/journal...
cambridge.org
Thallus growth stage affects community-wide capacity for carbon metabolism in the alpine heath lichen Ochrolechia frigida | The Lichenologist | Cambridge Core
Thallus growth stage affects community-wide capacity for carbon metabolism in the alpine heath lichen Ochrolechia frigida
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The Lichenologist @lichenologist.bsky.social · 11/09/2026
The latest issue of the #Lichenologist has been published today! Enjoy the latest lichen research, including #OpenAccess articles, online here: www.cambridge.org/core/journal...
cambridge.org
The Lichenologist: Volume 58 - Issue 3-4 | Cambridge Core
Cambridge Core - The Lichenologist - Volume 58 - Issue 3-4
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Nathan Chrismas @thevagrantlichenologist.com · 07/08/2026
Have been a bit quiet on here recently (social media/life overload perhaps?), but licheneering continues. Here's another example of the mega-rare-in-Scotland Catolechia wahlenbergii spotted on a glorious day scrambling Castle Ridge on Ben Nevis a cpuple of weeks back.
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Nathan Chrismas @thevagrantlichenologist.com · 07/08/2026
Very proud to have these hills as part of my extended office. One of the very best places in the country. www.bbc.co.uk/news/article...
bbc.co.uk
Torridon declared Scotland's newest national nature reserve
It is the first since Glen Coe and Mar Lodge Estate were granted the status in 2017.
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Nathan Chrismas @thevagrantlichenologist.com · 13/05/2026
On a climbing trip in Sweden and pretty psyched to see this abundant Umbilicaria crustulosa, a lichen with a super limited distribution in the UK but all over the granite cliffs here where there's a bit of drainage
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Nathan Chrismas @thevagrantlichenologist.com · 31/03/2026
I'm out west this week surveying some patches of woodland on the Balmacara estate outwith the well known Coille Mhor SSSI. There's some amazing lichens about, like these lovely Pseudocyphellaria citrina and P. norvegica. #lichenGBI
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Nathan Chrismas @thevagrantlichenologist.com · 18/03/2026
Had a good day at Glasdrum NNR filling a few gaps in my knowledge of Scottish rainforest lichens with the help of Oliver Moore. This was the find of the day, the nationally rare jelly Leptogium hibernicum. #lichenGBI @plantlifeuk.bsky.social
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Nathan Chrismas @thevagrantlichenologist.com · 14/03/2026
Nice looking gig in Wales for any lichen ecologists interested in old mine sites jobs.miningremediation.co.uk/vacancies/60...
jobs.miningremediation.co.uk
Project Ecologist (Wales) in Homeworker | Mining Remediation
View details and apply for this Project Ecologist (Wales) vacancy in Homeworker. Join Us and Make a Real Impact in Ecological Protection and Enhancement! Do you dream of working day to day as ...
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Nathan Chrismas @thevagrantlichenologist.com · 21/02/2026
Found a lichen lifer today, Catolechia wahlenbergii, one of our rarest arctic-alpines. In Glen Nevis, VC97. Last official record from the area in an adjacent monad was 2003. What a beauty! #lichenGBI
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Nathan Chrismas @thevagrantlichenologist.com · 19/02/2026
I've been out on my first fieldwork with NTS this week looking at some of their woodland sites in Perthshire. Some nice old growth indicators tucked in there, including Lopadium disciforme (black fruits) and Mycobilimbia sphaeroides (brown fruits). Also Oliver Moore.
Oliver looking at a treeA lichen black fruits on a green squamulose thallusA lichen, brown fruits on a green granular thallus
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 12/02/2026
😍 Great to see some lichen love from April Windle of the @britishlichensociety.org.uk, plus our own Bill Bealey explaining how our LicheN app is used for measuring sensitivity to nitrogen pollution Featured on BBC News ⤵️ www.bbc.co.uk/news/article... 🧪
bbc.co.uk
How lichen hold the secret to a breath of fresh air
An app uses lichen to help monitor air quality in places like the New Forest.
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Nathan Chrismas @thevagrantlichenologist.com · 19/01/2026
I'll be spending a bit more time here from now on, pretty neat to have access to all the specimens in the RBGE herbarium
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Nathan Chrismas @thevagrantlichenologist.com · 18/01/2026
Ever seen Pseudevernia furfuracea fruiting before? I'm not sure I have, but here it is on Pinus sylvestris on the shore of Loch Gamhna, Rothiemurchus VC96
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Nathan Chrismas @thevagrantlichenologist.com · 11/01/2026
Big new start for me tomorrow - after a decade in the research world, for the next two years I'm going to be working with National Trust for Scotland learning what it takes to be an independent lichen surveyor.
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Nathan Chrismas @thevagrantlichenologist.com · 04/01/2026
Another one from the Tafraout granite. This looks superficially like some images of Acarospora strigata (I've never seen this in person so just having a stab...)
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Nathan Chrismas @thevagrantlichenologist.com · 03/01/2026
Some neat Psoras from near Tafraout in Morocco. The first I'm guessing is P. decipiens complex (I was wondering if P. savizcii given the pink squamules, but uncertain of the gypsum content of the soil). The second, looking very green after rain, I'm unsure. @annevankow.bsky.social any thoughts?
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peteconvey.bsky.social @peteconvey.bsky.social · 13/12/2025
Ecography - Wiley Online Library nsojournals.onlinelibrary.wiley.com/doi/10.1002/...
nsojournals.onlinelibrary.wiley.com
How the small host the small: cryptogam trait‐mediated structuring of Antarctic microarthropod communities
Primary producers shape terrestrial biodiversity, but most research has focused on vascular plants, while the role of cryptogams (mosses, lichens and algae) remains under-explored. Cryptogams dominat....
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Elia Guariento @eliaguariento.bsky.social · 09/12/2025
Want to work on biodiversity in the Alps? ⛰️ We are offering several internship positions for the upcoming spring and summer in collaboration with the Biodiversity Monitoring South Tyrol 🕷️🦋🦇🐜🌼🦗🪱 biodiversity.eurac.edu/interns-want...
biodiversity.eurac.edu
Interns wanted! - Biodiversity Monitoring South Tyrol
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Agristok @agristok.bsky.social · 06/12/2025
PhD Position in Taxonomic and Molecular Diversity of Epiphytic Lichens, Bryophytes & Microorganisms at Future Forests, University of Freiburg The University of Freiburg’s Excellence Cluster Future Forests invites applications for a PhD position researching the taxonomic and molecular diversity of…
agristok.net
PhD Position in Taxonomic and Molecular Diversity of Epiphytic Lichens, Bryophytes & Microorganisms at Future Forests, University of Freiburg
The University of Freiburg’s Excellence Cluster Future Forests invites applications for a PhD position researching the taxonomic and molecular diversity of lichens, bryophytes, and associated microorganisms. Learn more about the project, tasks, requirements, salary, and how to apply by January 12, 2026.
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Howard Lee @hlee.bsky.social · 25/11/2025
This paper raises the possibility that lichens had evolved by the late Ordovician, contemporary with earliest vascular plants 🧪⚒️ www.science.org/doi/10.1126/...
science.org
The rise of lichens during the colonization of terrestrial environments
Evidence reveals Spongiophyton as one of the earliest and most widespread lichens in Earth’s history.
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Nathan Chrismas @thevagrantlichenologist.com · 22/11/2025
Great article about fieldwork in Iceland this summer (in Icelandic but Google Translate does a decent job). I was invited to join by lichenologist Starri Heiðmarsson who I met thanks to the @ukarcticoffice.bsky.social UK-Iceland Arctic Science Partnership Scheme heimildin.is/grein/25295/...
heimildin.is
Hver vill búa á hrikalegu jökulskeri?
Í sumar gekk fjölþjóðlegur hópur náttúrufræðinga yfir Breiðamerkurjökul og upp í afskekktu jökulskerin Esjufjöll. Þau voru þangað komin til að skoða hvernig líf þróast og tekur land undan hopandi jökl...
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Nathan Chrismas @thevagrantlichenologist.com · 22/11/2025
Nitrates can really mess up lichens, but Xanthoria seems to deal with it pretty well. This article suggests that hydration plays a role, with Xanthoria better able to cope with stress when moist and metabollically active. #lichenresearch www.sciencedirect.com/science/arti...
sciencedirect.com
Hydration-driven metabolic activity enhances the resilience of Xanthoria parietina (L.) Th. Fr. to nitrate stress
Lichens can utilise nitrogen in molecular, reduced, and oxidized forms, but they preferentially use ammonium due to low energetic cost of its assimila…
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Nathan Chrismas @thevagrantlichenologist.com · 20/11/2025
A while ago I did a little experiment in getting a LLM to write some code to draw pictures of lichens. It was very apparent that it had no idea what it was doing. Looks like the situation hasn't gotten any better.
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Thomas R. Holtz, Jr. @arctomet.bsky.social · 04/11/2025
Remote sensing of lichens with drones for detecting dinosaur bones: Current Biology www.cell.com/current-biol...
cell.com
Remote sensing of lichens with drones for detecting dinosaur bones
Brian Pickles and colleagues show that exposed dinosaur bones can be remote sensed with drones by virtue of colored lichens growing on them.
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Nathan Chrismas @thevagrantlichenologist.com · 04/11/2025
I wasn't sure what I was going to get with this lumpy lecidioid thing (mica schist at ~800m VC96). I was half expecting a mutant Rhizo, but microscopy said otherwise.... #lichenGBI
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MycoKeys @mycokeys.pensoft.net · 30/10/2025
Based on morphology and molecular data, sixteen new species are described as part of a study on the taxonomy of Protoblastenia in Finland. 🔗 doi.org/10.3897/myco...
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Botanical Society of America @botsocamerica.bsky.social · 29/10/2025
#Fire avoidance & long-term population decline in the endangered Florida ground #lichen #Cladonia perforata within a pyrogenic habitat New #AJB research by @sterlingherron.bsky.social, Katherine Charton, Sarah Haller Crate, Stacy Smith, et al. doi.org/10.1002/ajb2... #botany #plantscience
 Cladonia perforata fragment in Florida rosemary scrub. (Credit: Scott G. Ward.)
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Melaine Le Roy @subfossilguy.bsky.social · 28/10/2025
UTTERLY SURREAL LOW ANGLE GLACIER SLIDE!! 😮😱 On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊 asiaplustj.info/en/node/354309 📽️ via @volcaholic1
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Trevor Heywood @metroscapes.ca · 24/10/2025
There are 110 other posts in the vicinity and I took a closer look at about 40 of them. The original one I noticed still happened to be the best in my opinion, in terms of "terrain" and diversity.
A selection of 24 wooden post tops with varying degrees of wood decomposition and moss / lichen growth.
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Pavel Skaloud @skaloud.bsky.social · 21/10/2025
In this paper, we show that photobiont diversity increases as lichens age. Interestingly, as the thallus grows, autosporine algae become more prevalent at the expense of zoosporine algae, likely because the latter play a key role in lichen establishment. 1url.cz/@Proto
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Nathan Chrismas @thevagrantlichenologist.com · 21/10/2025
Stereocaulon condensatum. This is a thing frequently associated with mine spoil so really nice to see it in a more natural setting - exposed soil flushed by mineral rich rock at ~800m VC96 #lichenGBI
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Nathan Chrismas @thevagrantlichenologist.com · 18/10/2025
Some very fine looking Trapeliopsis pseudogranulosa VC106 #LichenGBI
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Ashish Malik @ashish-malik.bsky.social · 17/10/2025
PhD opportunity with me at University of Edinburgh linked with Forest Research, funded by E5 DTP. On the microbial mechanisms of soil carbon cycling in tree-planted upland soils. Apply before 14th Dec. Please share with your network. Pic: one of our Scottish sites. e5-dtp.ed.ac.uk/project?item...
An upland landscape in Scotland with trees and open areas.
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MycoKeys @mycokeys.pensoft.net · 17/10/2025
Part of: Exploring the Hidden Fungal Diversity: Biodiversity, Taxonomy, and Phylogeny of Saprobic Fungi doi.org/10.3897/myco...
doi.org
Exploring the Hidden Fungal Diversity: Biodiversity, Taxonomy, and Phylogeny of Saprobic Fungi
Saprobic fungi, also known as saprophytic fungi, are considered the “key players” in decomposition and essential ecosystem components. They have a cosmopolitan distribution and can oc...
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Nathan Chrismas @thevagrantlichenologist.com · 17/10/2025
Nice new study from Veronika Kantnerova and @skaloud.bsky.social - lichen photobionts are not fixed from the 'birth' of a thallus and increase in diversity as a lichen ages academic.oup.com/femsec/artic...
academic.oup.com
Validate User
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The British Lichen Society @britishlichensociety.org.uk · 04/09/2025
BLS will welcome applications from members for travel grants to attend IAL10 next summer. The full details of the application process and closing date for applications are on the website. britishlichensociety.org.uk/the-society/....
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Kathrin Rousk @kathrinrousk.bsky.social · 24/09/2025
Come to Copenhagen to work on #moss #cyanobacteria interactions! Still time to apply for this postdoc position!! 👇
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Nathan Chrismas @thevagrantlichenologist.com · 14/10/2025
Orphniospora moriopsis on gneissose granite, Strath Vaich. I think this thing is pretty underrecorded on account of it being a fairly mysterious black crust, but when it's mature it develops a distinct orange pruina which can help to tell it apart from other things
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Nathan Chrismas @thevagrantlichenologist.com · 14/10/2025
Instagram is driving me insane and I'm missing the old days of Twitter so I'm going to try and start being a bit more active on here.
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Nathan Chrismas @thevagrantlichenologist.com · 03/07/2025
Some super lichens here in the Dolomites. A favourite of the trip so far is Bellemerea alpina, a species that's incredibly scarce in the Cairngorms but in the heart of its range here.
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Nathan Chrismas @thevagrantlichenologist.com · 29/06/2025
En route to the First Symposium of Alpine Lichenology. Very excited for this! I'll be discussing work from our Scottish hills and looking forward to putting it in the context of mountain environments on a wider scale.
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Nathan Chrismas @thevagrantlichenologist.com · 09/05/2025
Interesting looking study on the effects of seabird droppings on plant communities. Not read properly yet, but a quick skim and lichens are only mentioned once, despite being the only 'plant' visible in the lead photo (yes I know they're not plants, but)
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Nathan Chrismas @thevagrantlichenologist.com · 07/05/2025
Female Belted Beauty moth. This is the Scottish subspecies, Lycia zonaria atlantica, found on machair grassland in the Hebrides (here on Mingulay)
A wingless female belted beauty moth, Lycia zonaria.
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Nathan Chrismas @thevagrantlichenologist.com · 28/03/2025
In Birmingham for our workshop on lichen microbiomes thanks to the NERC Arctic Office. Here's @ingeborgklarenberg.bsky.social talking about her work on lichen associated communities in Antarctica
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Nathan Chrismas @thevagrantlichenologist.com · 13/03/2025
Good to see the BBS has made it over here too
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c0nc0rdance @c0nc0rdance.bsky.social · 28/02/2025
A map that centers on New Zealand, which I guess is reparation for all the maps that leave New Zealand off entirely.
It's a map that projects the globe of the Earth in a way that distorts the Americas and Eurasia, but accurately represents Australasia.  It's got white whispy clouds, blue water, and green to sand-yellow color on the landmasses.

Stolen from a Reddit post on /MapPorn, posted by user 'molfarus' in 2022.
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Lennart Bach @bachlennart.bsky.social · 19/02/2025
Aquatic photosynthesis knowledge would be at a considerably lower level without John Raven. What a life and legacy! 🌊 link.springer.com/article/10.1...
link.springer.com
John Raven, FRS, FRSE: a truly great innovator in plant physiology, photosynthesis and much more - Photosynthesis Research
This is a tribute to a truly inspirational plant biologist, Prof. John A. Raven, FRS, FRSE (25th June 1941– 23rd May 2024), who died at the age of 82. He was a leader in the field of evolution and phy...
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Nathan Chrismas @thevagrantlichenologist.com · 27/02/2025
Lots of this lovely Usnea ciliata to be found on the Grand Traverse of the Remarkables above Queenstown. A New Zealand endemic, one of its defining characteristics is the purple-black pigmentation at the ends of its branches
A man climbing on a mountain A black-tipped bushy lichen
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Nathan Chrismas @thevagrantlichenologist.com · 27/02/2025
Want a quick overview before diving into @metalichen.bsky.social et al's new work on Xanthoria -omics in @currentbiology.bsky.social? Read our commentary here www.cell.com/current-biol...
cell.com
Genomics: A window into the molecular mystery box of lichen symbiosis
How is a symbiosis built? Lichen metagenomic and metatranscriptomic surveys comparing growth stages, experimental treatments and environmental settings identify a catalogue of candidate genes — and mi...
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Nathan Chrismas @thevagrantlichenologist.com · 20/02/2025
Currently in New Zealand and blown away by the lichen assemblages here. Many familiar genera, but new species to me and boy are those macrolichens BIG. Here are Sticta latifrons, Yarrumia colensoi, and Stereocaulon ramulosum from the Mt Aspiring national park.
Sticta latifronsYarrumia colensoiStereocaulon ramulosum
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