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Kaz Ohashi

@kazohashilab.bsky.social
888 followers 646 following 145 posts

Pollinator foraging behavior & floral evolution | Assistant Professor @UofTsukuba | AE @jpollecol.bsky.social | Author of “Trade-off mitigation” paper (Biol Rev 2021): bit.ly/TradeoffMitigation | ohashilab.com

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Reposted by Kaz Ohashi
Prof. Jeff Ollerton @jeffollerton.bsky.social · 02/10/2026
Are plant–pollinator interactions more specialised in the tropics? After almost 25 years of thinking about this question, our new global analysis suggests there’s no simple latitudinal rule - it all depends! Read about it here: jeffollerton.co.uk/2026/10/01/a... #pollinators #ecology #biodiversity
jeffollerton.co.uk
Are plant-pollinator interactions more specialised in the tropics? A new global analysis suggests that it’s complicated…
Some scientific questions have a habit of following you around for much of your career. Back in 2002, Louise Cranmer and I published a paper in the journal Oikos asking a deceptively simple questio…
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Jessica Budke 🌱🥼🔬 @mossplants.bsky.social · 03/08/2026
Are you passionate about #naturalhistory #collections? Apply for our open position for the Herbarium Collections Manager @utkherbarium.bsky.social. We will start evaluating applications on Aug 17, so get your application in now. #Botany2026 #herbarium #jobs
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Kaz Ohashi @kazohashilab.bsky.social · 05/08/2026
Just finished reading "Our Fragile Moment” by @michaelemann.bsky.social. A fascinating journey through Earth’s climate history, feedbacks, hysteresis, & their complex interactions, with a message of urgency & agency. Thanks to the translators for making this accessible to Japanese readers!
Book cover of the Japanese edition of Our Fragile Moment: How Lessons from Earth’s Past Can Help Us Survive the Climate Crisis by Michael E. Mann. The cover features the large Japanese title on a white background above an illustration of the Earth with the original English title overlaid. A blue-and-yellow obi (book band) includes the message, “It is not too late—we still have the means to act,” and notes that the book is recommended by Al Gore. Published by NTS.
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Kaz Ohashi @kazohashilab.bsky.social · 21/07/2026
I came across a mating pair of Japanese Oakblue (Narathura japonica) during my morning walk. A phone pic, and no color enhancement or adjustment---this is exactly how they looked. The iridescent blue shimmer in the morning light was simply stunning! #Butterflies
A mating pair of Japanese Oakblue butterflies (Narathura japonica) on the ground, both with their wings open. The upper butterfly (male) is fully visible, displaying brilliant iridescent blue wings with black borders. The lower butterfly (female) is partly hidden beneath it, with part of its blue wings also visible.
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Kaz Ohashi @kazohashilab.bsky.social · 20/07/2026
Although this white paper focuses on the EU, the idea of pollinator stewardship is globally relevant. This is a conversation we should be having everywhere, not only in Europe. #Ecology #Conservation #PollinatorStewardship #Pollinators zenodo.org/records/2071...
zenodo.org
Towards pollinator stewardship in all policies: Policy incoherence in the EU is a major barrier to pollinator restoration
Joint White Paper from Horizon Europe-funded projects Butterfly, VALOR, PollinERA, WildPosh, AGRI4POL, ProPollSoil, RestPoll, and Safeguard Executive summary Pollinators are critical for Europe’s resi...
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Eduardo de la Peña @agricoedu.bsky.social · 08/07/2026
besjournals.onlinelibrary.wiley.com/doi/10.1111/...
besjournals.onlinelibrary.wiley.com
Generalist passerine birds perform a functional role as pollinators in temperate Europe
Nectar-feeding birds are effective pollinators. In temperate Europe, songbirds visit flowers but lack specialist traits, so functional pollination has been discounted. We use observations, pollen ide...
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Kaz Ohashi @kazohashilab.bsky.social · 27/06/2026
www.eurekalert.org/news-release...
eurekalert.org
Even morphologically similar pollinators carry distinct pollen assemblages
Pollinators are commonly classified into functional groups based on similarities in morphology and behavior, under the assumption that such groupings reflect comparable contributions to plant reproduc...
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Kaz Ohashi @kazohashilab.bsky.social · 25/06/2026
Isn’t there a difference between evaluating the quality of a paper and ranking papers against one another? In particular, assessing originality seems far more difficult than assessing validity, as it requires a deep understanding of a field’s history and context.
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Andrea Howard @drandreahoward.bsky.social · 07/06/2026
I just returned from two back-to-back conferences. Students, I noticed that a lot of your slide decks had an oddly similar layout structure and I was able to confirm in conversations that these were AI-generated/assisted. Some thought about this for your own professional development: 🧵
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Kaz Ohashi @kazohashilab.bsky.social · 03/06/2026
Great to see elephant hawk moths (Deilephila elpenor) back in our yard, enjoying some fresh nectar from gardenia flowers! #teammoth #Pollinators
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Chelsea Cook @phdbee.bsky.social · 31/05/2026
We (me and @njdowdy.bsky.social) are hiring a PhD student! Come work with us! We seek a PhD student to investigate the evolution of acoustic behavior in Lepidoptera within a comparative evolutionary framework... Job closes this week! Apply ASAP! njdowdy.gitlab.io/balogh-fello...
njdowdy.gitlab.io
Kenneth F. Balogh Graduate Student Fellowship
A PhD position investigating the evolution of acoustic behavior in Lepidoptera, co-advised by Dr. Nicolas J. Dowdy (Milwaukee Public Museum) and Dr. Chelsea Cook (Marquette University). Apply by June ...
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日本の研究.com ニュース @research-er.jp · 28/05/2026
【注目プレスリリース】見た目がよく似た送粉昆虫でも運ぶ花粉の種類や比率は大きく異なる / 筑波大学 research-er.jp/articles/view/156508
research-er.jp
見た目がよく似た送粉昆虫でも運ぶ花粉の種類や比率は大きく異なる
2026.05.28 筑波大学 プレスリリース ハナバチ類やハエ類、甲虫類など見た目がよく似た送粉昆虫は花に及ぼす影響も似ていると考えられがちです。しかし、昆虫...
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Kaz Ohashi @kazohashilab.bsky.social · 26/05/2026
Our new paper out! By comparing body pollen carried by diverse insect pollinators visiting the same Ligustrum flowers, we found striking variation not only among major pollinator groups, but also within them — even between males and females of the same bumble bee species. Free view: rdcu.be/fj68l
rdcu.be
Heterospecificity of body pollen varies across and within trait-based groups of pollinators
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Kaz Ohashi @kazohashilab.bsky.social · 24/05/2026
Nearly complete global phylogeny of all 289 bumble-bee spp.— a large-scale synthesis combining nuclear genes, COI, genomes, and ancient DNA into a single BEAST2 framework. #Bees #Bombus
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Kaz Ohashi @kazohashilab.bsky.social · 22/05/2026
Happy to share that our latest research, led by Kohei Terada, "Heterospecificity of body pollen varies across and within trait-based groups of pollinators," has just been published in Arthropod-Plant Interactions. Read here (free online view): rdcu.be/fj68l or doi.org/10.1007/s118...
A collage photo of insect pollinators on the while tubular flowers of Ligustrum obtusifolium, including beetles, bumble bees, butterflies, a Noctuid moth, a hover fly, and a blow fly.The figure shows the observed relationship between the richness and evenness of body pollen species across 11 insect groups.
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Jeremy Yoder says no war @jbyoder.org · 28/04/2026
Peter H. Raven, co-author of "Escape and Radiate" coevolution with Paul Ehrlich, and then President and Director of the Missouri Botanical Garden for almost four decades, passed away April 25: www.missouribotanicalgarden.org/peter-raven
missouribotanicalgarden.org
Remembering Dr. Peter H. Raven
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Kaz Ohashi @kazohashilab.bsky.social · 20/04/2026
Just saw a queen Bombus diversus diversus looking for a nest site. Lady, you brightened my day! #Bees
A queen of Bombus diversus diversus looking for a place to build a nest.A queen of Bombus diversus diversus looking for a place to build a nest.A queen of Bombus diversus diversus looking for a place to build a nest.A queen of Bombus diversus diversus looking for a place to build a nest.
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日本の研究.com ニュース @research-er.jp · 16/03/2026
【注目プレスリリース】先んずれば花色を制す ―「先客」を確保した地味な花は派手な花にも負けずハチを惹きつける― / 京都大学,筑波大学 research-er.jp/articles/view/154063
research-er.jp
先んずれば花色を制す ―「先客」を確保した地味な花は派手な花にも負けずハチを惹きつける―
2026.03.16 京都大学,筑波大学 プレスリリース 概要川口利奈 工学研究科講師、大橋一晴 筑波大学講師、徳永幸彦 同准教授、小沼明弘 農業環境技術研究所 主任...
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Kaz Ohashi @kazohashilab.bsky.social · 25/03/2026
Congratulations, Kentaro on this great achievement and on earning your PhD!
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Functional Ecology @funecology.bsky.social · 24/03/2026
⭐️Shortlisted for the 2025 Haldane Prize!⭐️ Kentaro Takagi investigated realised flower constancy as an adaptive strategy where pollinators balance the effort of recalling information with travel costs in various environments🐝 buff.ly/ITNR5ov 🧪🌍️
buff.ly
Haldane Prize 2025 | Kentaro Takagi: Realized flower constancy in bumble bees: Optimal foraging strategy balancing cognitive and travel costs and its possible consequences for floral diversity
2025 HALDANE PRIZE SHORTLIST: Kentaro Takagi discusses the paper “Realized flower constancy in bumble bees: Optimal foraging strategy balancing cognitive and travel costs and its possible con…
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Kaz Ohashi @kazohashilab.bsky.social · 23/03/2026
Paul Ehrlich and The Bet "Markets don’t work when the things we care about don’t have market prices." legal-planet.org/2026/03/19/p...
legal-planet.org
Paul Ehrlich and The Bet - Legal Planet
Paul Ehrlich died last weekend at the age of 93. Here is the real lesson everyone misses about Ehrlich and his famous wager.
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Kaz Ohashi @kazohashilab.bsky.social · 18/03/2026
ct.moreover.com?a=5910247119...
ct.moreover.com
Not So Pretty But Plenty Of Likes
Kyoto, Japan -- If you were a bee, how would you choose a flower to land on? You might go to the most beautiful one, as pollination biologists have
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Kaz Ohashi @kazohashilab.bsky.social · 17/03/2026
ct.moreover.com?a=5908949354...
ct.moreover.com
Las abejas eligen las flores como si fuera una foto de Instagram: por la cantidad de “likes” que tiene
Un estudio sugiere que las abejas no siempre eligen la corola más vistosa: a veces siguen a las primeras comensales, y ese gesto colectivo podría influir en la evolución misma de las plantas.
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Kaz Ohashi @kazohashilab.bsky.social · 17/03/2026
scienmag.com/not-the-most...
scienmag.com
Not the most attractive, but definitely popular: this science news is
In the intricate dance of nature, the relationship between pollinators and flowering plants is fundamental to ecosystems worldwide. Conventional wisdom in pollination biology has long emphasized the
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Science X / Phys.org @sciencex.bsky.social · 13/03/2026
Bumblebees often choose flowers based on the presence of other bees rather than color alone, suggesting social cues can outweigh visual attraction in pollinator foraging decisions. doi.org/hbsjc2
phys.org
Not so pretty but plenty of likes: A bumblebee bandwagon effect prioritizes busy flowers over beautiful ones
If you were a bee, how would you choose a flower to land on? You might go to the most beautiful one, as pollination biologists have long suggested that flowers with striking colors attract pollinators more easily.
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Kaz Ohashi @kazohashilab.bsky.social · 17/03/2026
www.eurekalert.org/news-release...
eurekalert.org
Not so pretty but plenty of likes
Kyoto, Japan -- If you were a bee, how would you choose a flower to land on? You might go to the most beautiful one, as pollination biologists have long suggested that flowers with striking colors att...
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Kaz Ohashi @kazohashilab.bsky.social · 16/03/2026
www.kyoto-u.ac.jp/en/research-... doi.org/10.1111/1365... @britishecologicalsociety.org
kyoto-u.ac.jp
Not so pretty but plenty of likes
Kyoto, Japan -- If you were a bee, how would you choose a flower to land on? You might go to the most beautiful one, as pollination biologists have long suggested that flowers with striking colors att...
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Kaz Ohashi @kazohashilab.bsky.social · 13/03/2026
Excited to learn that our flower constancy paper is shortlisted for the 2025 Haldane Prize, Functional Ecology’s award for early career researchers. Congratulations, Kentaro Takagi! #Ecology #Bees #AnimalBehaviour #FlowerConstancy buff.ly/Te56j18
Functional Ecology’s web page where they show 13 short-listed papers for Haldane Prize 2025.
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Kaz Ohashi @kazohashilab.bsky.social · 19/02/2026
Some flowers aren’t the flashiest, but they can still get a crowd. Our study shows less colourful flowers can attract as many pollinators as bright ones by getting early visitors—a floral “bandwagon effect” like a popular restaurant drawing the next wave of customers. bit.ly/4aq7WVL #Ecology #Bees
bit.ly
Bandwagon effects in a floral market: Early pollinator acquisition offsets colour disadvantages in less attractive flowers
Read the free Plain Language Summary for this article on the Journal blog.
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Functional Ecology @funecology.bsky.social · 19/02/2026
📰Published📰Conveying a sense of buzz: how plain flowers benefit from early pollinators in winning followers🐝 buff.ly/ldxNWh9 🧪🌍️
buff.ly
Conveying a sense of buzz: how plain flowers benefit from early pollinators in winning followers
Lina G. Kawaguchi, Kazuharu Ohashi, Akihiro Konuma, Yukihiko Toquenaga This is a plain language summary of a Functional Ecology research article which can be found here. Why do some flowers invest …
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Kaz Ohashi @kazohashilab.bsky.social · 20/02/2026
Our new paper is out! Here’s the lay summary. #Ecology #Pollination #AnimalBehavior #SocialInformation #FloralEcology #BandwagonEffects #Bumblebees
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Kaz Ohashi @kazohashilab.bsky.social · 19/02/2026
Some flowers aren’t the flashiest, but they can still get a crowd. Our study shows less colourful flowers can attract as many pollinators as bright ones by getting early visitors—a floral “bandwagon effect” like a popular restaurant drawing the next wave of customers. bit.ly/4aq7WVL #Ecology #Bees
bit.ly
Bandwagon effects in a floral market: Early pollinator acquisition offsets colour disadvantages in less attractive flowers
Read the free Plain Language Summary for this article on the Journal blog.
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British Beekeepers Association @bbka.org.uk · 27/01/2026
The findings found that managed stingless bees can “markedly enhance coffee production” www.gcrmag.com/brazilian-be...
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Royal Society Publishing @royalsocietypublishing.org · 06/02/2026
Review in #ProcB - Flower constancy in #pollinators: a bouquet of agendas shapes interactions among mutualistic partners #OpenAccess @chrisleduck.bsky.social royalsocietypublishing.org/rspb/article...
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Mariella Herberstein (she/her) 🌈 @mherberstein.bsky.social · 03/02/2026
I am looking for a PhD working on tracking trait changes in insects/spiders at the Leibniz Institute for the Analysis of Biodiversity change @leibnizlib.bsky.social and the University of Hamburg. Apply here: www.uni-hamburg.de/en/stellenan...
uni-hamburg.de
Job advertisement
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Kaz Ohashi @kazohashilab.bsky.social · 01/01/2026
2026 Happy New Year!
Four swans swiftly descending toward a pond, with a quote by Gary Snyder reading, “Nature is not a place to visit; it is home.”
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Chris Thorogood @christhorogood.bsky.social · 20/11/2025
Earlier on the expedition we found the most beautiful flower, and here, my friends, is the biggest: Rafflesia arnoldi seen in full bloom today in the Sumatran jungle. This is the largest flower on earth and one of the greatest wonders of the natural world.
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Mario Vallejo-Marin @nicrodemo.bsky.social · 03/11/2025
Too warm to buzz? Check out our newest paper on how warming temperatures affect bee buzzes in the Arctic. Well done to Charlie and Guadalupe and other coauthors for this nice study in the Swedish Arctic! @hfspo.bsky.social www.nature.com/articles/s41...
nature.com
Increasing temperatures affect thoracic muscle performance in Arctic bumblebees - Nature Communications
Increasing temperatures threaten cold-adapted pollinators such as Arctic bumblebees by disrupting their physiology. This study found that thorax acceleration during non-flight vibrations peaks at 25 °...
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Avery Russell @draverbee.bsky.social · 23/10/2025
I cannot believe our work is finally out there and in @journal-evo.bsky.social ! This was an enormous group effort! We provide an updated estimate of the number of buzz pollinated angiosperm species, genera, and families, look at consequences for diversification, number of transitions, and more!
Circular phylogeny showing the branching pattern of 30k plant species with lineages with poricidal and non poricidal taxa indicated. A small subset of poricidal taxa are illustrated around the phylogeny.
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Mario Vallejo-Marin @nicrodemo.bsky.social · 23/10/2025
How many plant species are buzz pollinated? After more than six years in the making, our paper on the convergent evolution of buzz pollinated flowers is out in @journal-evo.bsky.social. Thanks @draverbee.bsky.social @roszenil.bsky.social and all co-authors for your hard work! doi.org/10.1093/evol...
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Kathy Darragh @kdarragh.bsky.social · 11/09/2025
I'm looking for PhD students to join the lab starting August 2026. We study the evolution of insect chemical signals so if you're interested in evolutionary biology, chemical ecology, molecular biology, behavior, or genetics, this could be a good fit for you! More info here: tinyurl.com/mrxchwfm
Green butterfly sat on a flower.
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New Phytologist @newphyt.bsky.social · 22/09/2025
#Viewpoint: Exploring the importance of aromatic #plants' extrafloral volatiles for #pollinator attraction Kantsa et al. 👇 📖 nph.onlinelibrary.wiley.com/doi/10.1111/... #LatestIssue #PlantScience
Known and proposed ecological functions of aboveground aromatic emissions (i.e. constitutive volatile emissions from vegetative plant tissues) in mediating biotic interactions with arthropods, other plants, and microorganisms.
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Prof Sam Illingworth @samillingworth.com · 17/09/2025
🐜 Ants on flowers A meta-analysis shows protective ants reduce flower visits, especially by bees, but usually do not harm plant reproduction. Effects depend on nectary location and visitor type. 🔗 doi.org/10.1111/1365... #SciComm 🧪 #Ecology #Pollination
doi.org
Ants on flowers: Protective ants impose a low but variable cost to pollination, moderated by location of extrafloral nectaries and type of flower visitor
Individuals who engage in multiple mutualisms often have to pay indirect costs because of the interference of one mutualism on another. We found that protective ants had a low but variable impact on ....
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JPE - Journal of Pollination Ecology @jpollecol.bsky.social · 17/09/2025
"The fate of pollen in two morphologically contrasting buzz-pollinated Solanum flowers" by Vasquez-Castro et al. freshly published! doi.org/10.26786/192...
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Prof. Jeff Ollerton @jeffollerton.bsky.social · 12/09/2025
A new review gives us a deeper understanding of the evolution of plant-pollinator interactions! A brilliant critical review of the Grant–Stebbins model of how plants evolve by Kathleen Kay and Bruce Anderson just published. Read more about it here: jeffollerton.co.uk/2025/09/12/a...
jeffollerton.co.uk
A new review gives us a deeper understanding of the evolution of plant-pollinator interactions
If you’ve read my book Birds & Flowers: An Intimate 50 Million Year Relationship, you’ll know that I spend a few pages discussing the long-standing paradigm of how interactions betw…
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Martin Giurfa @martingiurfa.bsky.social · 10/09/2025
See last article on "The cognitive side of communication in social insects", just published in @TrendsCognSci . Free access under this link! authors.elsevier.com/sd/article/S...
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Peter Stronach @macstronach.bsky.social · 08/09/2025
Spent hours being spellbound by Convolvulus Hawk Moths last night as they nectared on Nicotiana plants in my highland garden!. Up to 3 feeding at a time, their entire abdomens glowing red hot in the thermal from flight muscle use!! #teammoth @migrantmothuk.bsky.social @savebutterflies.bsky.social
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Dan Sloan @sloanevolab.bsky.social · 08/09/2025
The Department of Biology at Colorado State University is hiring an Assistant Professor in the area of plant-microbe interactions! Please spread the word! jobs.colostate.edu/postings/165...
jobs.colostate.edu
Assistant Professor Plant-Microbe Interactions
We seek a creative, collaborative, and visionary plant biologist to establish an internationally recognized research program at the forefront of plant-microbe interactions aimed at understanding how t...
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Kaz Ohashi @kazohashilab.bsky.social · 24/08/2025
Scott Loarie talks about #iNaturalust at #TED | The surprising power of your nature photos www.ted.com/talks/scott_... #Wildlife #CitizenScience #Conservation #Biodiversity
ted.com
The surprising power of your nature photos
Scott Loarie has a challenge for you: go outside and take a picture of a living thing. He introduces the global community of people building a living atlas of the natural world by sharing their nature...
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Kathleen Kay @kathleenmkay.bsky.social · 08/08/2025
Is the Most Effective Pollinator Principle a zombie idea? How do plants adapted to one pollinator shift to another without traversing an adaptive valley? How should we measure fitness in pollinator selection studies? We explore these questions and more in a new review doi.org/10.1093/aob/...
doi.org
Beyond the Grant–Stebbins model: floral adaptive landscapes and plant speciation
AbstractBackground. Floral diversity, a striking feature of angiosperm evolution, provides the impetus and rationale for linking pollinator-driven selectio
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