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Ulf Bergström

@ulfbergstrom.bsky.social
648 followers 550 following 41 posts

Marine ecologist at SLU Aqua. Fish, habitats and conservation. Love maps and living by the sea.

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Reposted by Ulf Bergström
Jeannette Eggers @jeannetteeggers.bsky.social · 15/09/2025
41 kända svenskar påminner politikerna om att: - Makt innebär ansvar - Klimatet är inte en partipolitisk fråga - Vetenskapen måste stå i centrum Samt ett medskick till mediehusen: "ställ de kritiska frågorna och ta hjälp av forskarsamhället för att utvärdera de politiska utspel som görs" 🙏🙌🙏
aftonbladet.se
Vi är 89 procent – ni gör klokt i att ta oss på allvar
DEBATT. Om ett år är det riksdagsval. Svenska medborgare står inför den viktigaste valrörelsen under vår livstid. I en värld som kantas av multipla kriser, huma
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Jeannette Eggers @jeannetteeggers.bsky.social · 12/09/2025
Tillsammans med andra forskare uttrycker jag min oro för våra barns framtid i en allt farligare, mer instabil värld, och ber vår landsbygdsminister att fatta beslut med barn i åtanke. Med makt kommer ansvar. Och han har mer makt än de flesta andra medborgare i landet.
aftonbladet.se
Hjälp oss – fatta beslut med barnen i dina tankar
DEBATT. Hej Peter!
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Ulf Bergström @ulfbergstrom.bsky.social · 18/08/2025
Come work with us! 2-year postdoc position open at SLU Aqua, on the role of herring in coastal food webs of the Baltic Sea. Applications due August 25. www.slu.se/om-slu/jobba...
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Gezzer @gezzer3115.bsky.social · 31/07/2025
Motherfucking windfarms
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Ulf Bergström @ulfbergstrom.bsky.social · 02/07/2025
Still a long way to go to 2030.
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The Guardian @theguardian.com · 25/06/2025
Overfishing has caused cod to halve in body size since 1990s, study finds
theguardian.com
Overfishing has caused cod to halve in body size since 1990s, study finds
Evolutionary change driven by intensive fishing led cod to ‘shrink’ from average 40cm length in 1996 to 20cm in 2019 Overfishing has led to a collapse in the eastern Baltic cod population, but over the past three decades the size of the fish themselves has also been dramatically and mysteriously shrinking. Now scientists have uncovered genomic evidence that intensive fishing has driven rapid evolutionary changes that have contributed to these fish roughly halving in average body length since the 1990s. Continue reading...
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Ulf Bergström @ulfbergstrom.bsky.social · 25/06/2025
We tend to shift our baselines fairly quickly. In the 1900s, this June would have been warmer than average.
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Reposted by Ulf Bergström
Helen Czerski @helenczerski.bsky.social · 03/06/2025
Important: if you think that governments should move faster on climate, enacting policies now for a cleaner, greener future, *** you are in the MAJORITY ***. A huge majority. HT to @tomheap.bsky.social for digging out this Nature paper on who actually wants what. www.nature.com/articles/s41...
nature.com
Globally representative evidence on the actual and perceived support for climate action - Nature Climate Change
Global support and cooperation are necessary for successful climate action. Large-scale representative survey results show that most of the population around the world is willing to support climate ac...
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Frida Hylander @fridahylander.bsky.social · 26/04/2025
Från klimatpolitik till kriminalpolitik viftar regeringen undan välbelagd forskning som ”olika åsikter”. Det är inte bara kunskapsförsktande utan lägger grunden för ineffektiv och i värsta fall farlig politik. Bra att dessa drygt 1000 forskare säger ifrån.
dn.se
DN Debatt. ”Vår forskning kan inte viftas bort som åsikter”
I USA ifrågasätts vetenskapen och forskningens frihet undergrävs medvetet av styrande politiker.
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Ulf Bergström @ulfbergstrom.bsky.social · 26/04/2025
Vi ser oroande tendenser till att kunskap och forskning relativiseras eller ignoreras även i Sverige. Den utvecklingen behöver vi vända för att bevara ett välmående och demokratiskt samhälle. Här ett debattinlägg som har undertecknats av över 1000 forskare i landet: www.dn.se/debatt/var-f...
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Alexandra Urisman Otto @alexandrauo.bsky.social · 15/04/2025
Många texter om missade klimatmål nu. Påminner om att målen är långt ifrån tillräckliga för att vara i linje med Parisavtalet. Gäller också på global nivå, se här från IPCC – även om alla länders åtaganden fullgörs helt och hållet, beräknas vi nå 3,2 grader 2100. Det är en värld vi inte känner.
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Ulf Bergström @ulfbergstrom.bsky.social · 15/04/2025
Snart är det påsk, och sillen har en given plats på bordet. Idag äter vi sill/strömming främst till större högtider, men sillen har spelat en enormt viktig roll för Sveriges utveckling. Den skulle dessutom kunna ta plats på vardagsmatbordet igen. Här är 30 fascinerande minuter om havets silver.
sverigesradio.se
Sill — världens vanligaste ryggradsdjur. Varför äter vi inte mer? - Meny
Det finns enormt mycket sill. Och sill är väldigt nyttigt. Ändå äter vi bara en fjärdedel av det som fiskas. Resten blir foder. Hur kan det ändras?
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Ulf Bergström @ulfbergstrom.bsky.social · 09/04/2025
If you have a chance to see the new Swedish documentary on the dire state of fish stocks and fisheries in the Baltic Sea, please do. We need a public debate on this issue also among our neighbours around the Baltic to find the political will to change the current dysfunctional system.
svtplay.se
Uppdrag granskning – Fisken vi ärvde
"När de väl är borta, så är de borta för alltid". För 30 år sedan fiskades våra tre nationalfiskar - torsk, lax och strömming - i mängder i Östersjön. Idag går de knappt att få tag på. Vad är det som ...
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🌊Markus Knigge🐟 @oceanknigge.bsky.social · 25/03/2025
Haven't looked into it, but seems certainly a significant number. news.nationalgeographic.org/study-bottom...
news.nationalgeographic.org
Study: Bottom Trawling in European Waters Costs Society up to €11 Billion Annually
New research shows that bottom trawling — a damaging fishing practice subsidized by European taxpayers — costs billions, largely due to massive carbon dioxide (CO2) emissions. Forbidding the practice ...
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🌊Markus Knigge🐟 @oceanknigge.bsky.social · 20/03/2025
Interesting study linking MPA guide with conservation outcomes. Link ➡️ www.cell.com/cell-reports...
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Ulf Bergström @ulfbergstrom.bsky.social · 14/03/2025
Constructive and encouraging discusions today at the Baltic Sea seminar in Stockholm, on how to strengthen herring populations and restore ecosystem functions. Strong lineup of speakers, with the Swedish fisheries minister Kullgren, EU MEP Isabella Lövin among many others.
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protectbaltic @protectbaltic.bsky.social · 20/02/2025
The full report from last year’s webinar on cost-effective marine restoration in the Nordics, co-hosted by @helcominfo.bsky.social & The Nordic Council of Ministers' Working Group for Environment and Economy (NME) is now available buff.ly/414XrRN
buff.ly
Strategies for cost-effective marine restorations in the Nordics
This report captures the main insights and outcomes of the webinar, serving as a valuable resource for those working in marine restoration and environmental economics. It highlights the collaborative ...
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Ulf Bergström @ulfbergstrom.bsky.social · 13/02/2025
Vill du veta hur det går för Sveriges fiskbestånd så ta en titt på årets version av fiskbarometern
fiskbarometern.se
Fiskbarometern
Fisk- och skaldjursbestånd i svenska hav och vatten.
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Ulf Bergström @ulfbergstrom.bsky.social · 12/02/2025
Land rise, has been a prominent feature of the coastal zone of the northern Baltic Sea since the last glaciation. Not so anymore, as the rate of sea level rise will nullify land rise for the rest of the century. For large portions of our European coasts though, prospects are much bleaker.
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Ulf Bergström @ulfbergstrom.bsky.social · 11/02/2025
If you haven't followed the documentary Fiskarnas rike, you are in for a treat. Important tales about the world of fishes, with absolutely marvellous, BBC-quality, sequences of our Nordic species. Seven episodes in total, the last one broadcasted tomorrow.
svtplay.se
Fiskarnas rike
Följ med på en magisk resa i Sveriges sjöar, hav och vattendrag. Naturfilmaren Martin Falklind tar oss med under ytan och låter oss träffa vattenvarelser vi knappt trodde fanns. Som flera hundra kilo ...
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Ulf Bergström @ulfbergstrom.bsky.social · 26/01/2025
A Sunday cartoon - The epic conflict between fish and man
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Lachlan Fetterplace @fiskeforbrains.bsky.social · 14/01/2025
Post doc at SLU Aqua - Mapping aquatic resources in a changing climate (based at our Uppsala, Sweden campus). Fluency in English & R programming skills are key requirements. I can highly recommend working with A/Prof Charlotte Berkström & @ulfbergstrom.bsky.social 🦑🧪🌎🐠 www.slu.se/en/about-slu...
A four story building slightly obscured by 5 large trees. In front of the building is concrete paving and a long (horizontally) set of ca. 10 steps. The building is grey except for a prominent section sticking out towards the camera that is bright yellow with lots of glass windows.
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Peter Gleick @petergleick.bsky.social · 11/01/2025
If you think slowing or stopping #climate change is too expensive, you have it backwards. Failing to slow or stop #climatechange is what's expensive. www.bbc.com/news/article...
bbc.com
LA wildfire damages set to cost record $135bn
Some of the most expensive properties in the US have been wiped out by the fires.
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Ed Hawkins @edhawkins.org · 10/01/2025
Mapping changes in temperature: 2024 edition
175 maps showing temperature change from 1850 to 2024
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Ulf Bergström @ulfbergstrom.bsky.social · 08/01/2025
Bra att länsstyrelserna lyfter problemen i Västerhavet. Man föreslår följande åtgärder: - Reglera fiske så att överfiskade bestånd kan återhämta sig - Inrätta fler marina reservat med omfattande reglering - Mer miljöövervakning och uppföljning för att säkra nödvändig kunskap
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Ulf Bergström @ulfbergstrom.bsky.social · 08/01/2025
Atlantic herring is one of the most abundant fishes in the world. In two new studies, we show that some herring in the Baltic Sea have become fish eaters. These piscivorous herring are genetically unique, grow fast, and play an important role in regulating stickleback populations.
slu.se
Piscivorous herring – a unique fish in the Baltic Sea ecosystem | slu.se
In the coastal areas of the Baltic Sea, unusually large herring are sometimes caught, which has long raised questions. Are these large herring a separate population, or are they individuals that ha...
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Ulf Bergström @ulfbergstrom.bsky.social · 06/01/2025
Beautiful way of drawing attention to an important message
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Protected Planet @protectedplanet.bsky.social · 03/01/2025
#ProtectedPlanet January 2025 Update: 🌍 WDPA: is 305,195 (303,312 #ProtectedAreas), covering 244 countries & territories. WD-OECM: is 6,484 (6,463 #OECMs), covering 15 countries & territories. GD-PAME: No updates for January 2025. buff.ly/400d9Nt
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Climatologist49 @climatologist49.bsky.social · 05/01/2025
🚨🚨🚨 2024 was the warmest year on record globally. An astounding 32% of the Earth had it's single warmest year since 1940. 🔥🔥🔥
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Prof Michael Meredith 🌊🧪🥼❄️ @oceanandice.bsky.social · 04/01/2025
The densest water in the world ocean forms around Antarctica, and then spreads out to flood the global abyss. We’ve seen the production of this water dwindle over the past few decades, a change that is now impacting the North Atlantic. 🌊🧪❄️ www.nature.com/articles/s41...
nature.com
Weakening of the Atlantic Meridional Overturning Circulation abyssal limb in the North Atlantic - Nature Geoscience
Mooring observations and hydrographic data suggest the Atlantic Meridional Overturning Circulation abyssal limb has weakened over the past two decades in the North Atlantic, most likely due to reduced...
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Kevin Connor @kevintconnor.bsky.social · 26/12/2024
A trophic cascade of 🦦&🦀: "Sea otters ate multiple crab species, allowing snails, which crabs eat, to thrive. The snails then ate more algae that had blocked sunlight from reaching the sea grass. More sea grass provided protection for young fish and food for migratory birds."🧪🦑🎁 wapo.st/4gUouFX
wapo.st
Green crabs have invaded habitats. Sea otters might be the solution.
A recent study found sea otters are eating thousands of green crabs at a California reserve, reducing the invasive species’ population.
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Ulf Bergström @ulfbergstrom.bsky.social · 23/12/2024
The curious case of piscivorous herring in the Baltic Sea
scitechdaily.com
Baltic Herring Turn Predators: A Stunning Evolutionary Shift
A new study reveals a genetically distinct type of Baltic herring that thrives on a fish diet, unlike its Atlantic counterpart. This adaptation has likely occurred due to the unique conditions of the ...
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Ulf Bergström @ulfbergstrom.bsky.social · 23/12/2024
Sillen och strömmingen har inte bara en central plats på julbordet, utan framför allt i ekosystemet. Nu visar vi i två nya studier att en del strömming längs Östersjökusten är utpräglade rovfiskar. Denna rovströmming är genetiskt unik, växer snabbt och bidrar till att hålla storspiggen i schack.
slu.se
Rovströmmingen – en unik fisk i Östersjöns ekosystem | slu.se
I Östersjöns kustområden fångas ibland ovanligt stora strömmingar, vilket länge väckt frågor. Utgör dessa storväxta strömmingar ett separat bestånd, eller handlar det om individer som haft tillgång...
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Assaad Razzouk @assaadrazzouk.bsky.social · 21/12/2024
The new @IPBES report has some jaw-dropping data everywhere, e.g: >The private sector spends $5.3 trillion/year directly damaging biodiversity >Government spend $1.7 trillion/year incentivizing destroying biodiversity We are a self-destructive species ipbes.canto.de/index_mobile...
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Fanny The Prez @fannytheprez.bsky.social · 21/12/2024
Och här kommer första texten: om en riggad skogspolitik www.aftonbladet.se/ledare/a/Vze...
aftonbladet.se
Såklart den svenska skogspolitken är riggad
Nu avslöjar den ideella föreningen Skydda Skogen att ett av Sveriges största skogsbolag, SCA, vars avverkning är FSC-certifierad, hugger ner skyddsvärd skog.
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Ulf Bergström @ulfbergstrom.bsky.social · 21/12/2024
Science ftw!
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Ulf Bergström @ulfbergstrom.bsky.social · 19/12/2024
Exciting postdoc position open at SLU Aqua, on species distribution modelling, climate change, nutrition and conservation. The postdoc will be doing spatial modelling in the Indian Ocean and the Baltic Sea, get a broad network and a bunch of fantastic colleagues: lnkd.in/dXG2Zm4m
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 22/11/2024
Bluesky is emerging as the new platform for science - Mike Young Academy buff.ly/3YTslLW
buff.ly
Bluesky is emerging as the new platform for science - Mike Young Academy
Scientific Twitter is about to find its true successor. And it is not X. This, our latest release, shows that the Bluesky network of scientists is growing — and growing.
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Mazeson @mazeson.bsky.social · 13/12/2024
www.svenskafiskeregler.se är för den som vill se vart man får fritidsfiska och framförallt under vilka tider man får fiska i havet, Vänern, Vättern, Mälaren, Hjälmaren och Storsjön, framtagen av Länsstyrelserna och HaV. För fiske i övrigt vatten har en annan webbplats tagits fram, Fiskekartan.se.
svenskafiskeregler.se
Startsida - Svenska fiskeregler
Svenska fiskeregler Svenska fiskeregler är länsstyrelsernas och Havs- och vattenmyndighetens gemensamma publika webbplats där du kan ta del av vilka regler som gäller för fritidsfiske i svenska havsom...
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Ulf Bergström @ulfbergstrom.bsky.social · 11/12/2024
Protected areas not only increases abundances, but also decreases shyness to lures in a large predatory fish
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Climate Action @climateaction.bsky.social · 08/12/2024
“With increased certainty, this meta-analysis suggests that extinctions will accelerate rapidly if global temperatures exceed 1.5°C.” www.science.org/doi/10.1126/...
science.org
Climate change extinctions
Climate change is expected to cause irreversible changes to biodiversity, but predicting those risks remains uncertain. I synthesized 485 studies and more than 5 million projections to produce a quant...
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Mazeson @mazeson.bsky.social · 08/12/2024
”Bottom trawling represents the most widespread anthropogenic physical disturbance to seafloor sediments on continental shelves.” Read this article: www.nature.com/articles/s41...
nature.com
Long-term carbon storage in shelf sea sediments reduced by intensive bottom trawling - Nature Geoscience
Intensive bottom trawling causes a long-term reduction of organic carbon stored in seafloor sediments, suggesting a need for more effective management, according to observations and biogeochemical mod...
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Nicolas Mouquet @nmouquet.bsky.social · 29/11/2024
Updating the #IUCN status of marine fish using AI shows that x5 more species are threatened with extinction than previously thought! see our study in Plos Biol with @nloiseau.bsky.social 👉 doi.org/10.1371/jour... 🔑 This silent extinction affects 12,7% of marine fishes (1337 species) ! 🧪🌐🌍🦤🦑
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Colin Simpfendorfer @sharkcolin.bsky.social · 06/12/2024
Yesterday our new #globalsharktrends paper came out in @science.org @nickdulvy.bsky.social did a great thread on the paper and included some GIFs that we had made but they did not play here on @bsky.app I'm hoping this now works. Status change through time... science.org/doi/10.1126/...
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Steven Beschloss @stevenbeschloss.bsky.social · 04/12/2024
What Banksy says…
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David Ullrich @davidullrich202.bsky.social · 05/12/2024
We finally have an explanation for 2023’s record-breaking temperatures A decline in cloud cover means Earth is absorbing more solar radiation which could explain the 0.2°C of missing heat scientists are struggling to account for www.newscientist.com/article/2458... docs.google.com/document/d/1...
newscientist.com
We finally have an explanation for 2023’s record-breaking temperatures
A decline in low-lying cloud cover means Earth is absorbing more solar radiation, which could explain 0.2°C of missing heat scientists have been struggling to account for
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Ulf Bergström @ulfbergstrom.bsky.social · 14/02/2024
New study out showing that plenty of neighbours and few top predators make predatory fish populations more resilient to a coastal regime shift. Read it here: www.nature.com/articles/s41....
nature.com
Predation and spatial connectivity interact to shape ecosystem resilience to an ongoing regime shift - Nature Communications
This study finds that habitat connectivity can increase resilience to ecosystem regime shifts. The authors used >7,000 fish samplings from the Baltic Sea to study a spatially propagating shift from...
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Eric Holthaus @ericholthaus.com · 11/02/2024
Global ocean temperatures have officially gone off the chart. We are in a climate emergency.
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Ulf Bergström @ulfbergstrom.bsky.social · 01/02/2024
För er som vill hålla koll på hur det går för fisk och kräftdjur i svenska vatten - nu är årets bedömning av beståndsstatus ute www.slu.se/ew-nyheter/2...
slu.se
Fiskbarometern: senaste trenden för svensk fisk och skaldjur | slu.se
På Fiskbarometern presenterar Sveriges lantbruksuniversitet tillstånd och trender för fisk- och skaldjursbestånd i svenska hav och sötvatten. Nu är bedömningarna för 2023 klara.
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Ulf Bergström @ulfbergstrom.bsky.social · 03/01/2024
On fantastic tiny beasts, like this larval gargoyle cusk, and how to find them www.smithsonianmag.com/science-natu...
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