Wolfgang Cramer
@wolfgangcramer.net
13K followers 2.4K following 870 posts
#Climate & #biodiversity emeritus scientist, professor of global #ecology, #CNRS, MedECC, #IPCC, Acad. d'Agriculture de France, Chief Editor Regional Environmental Change. Occasional rail travel and bicycle geek. 🇩🇪 🇫🇷 🇬🇧 🇸🇪 🇳🇴 https://tinyurl.com/wcrame
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wolfgangcramer.net
Just out: "Climate change risks on key open marine and coastal mediterranean ecosystems" rdcu.be/evGGx

@jpgattuso.bsky.social www.medecc.org

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title, authors and abstract of the paper

Climate change risks on key open marine and coastal mediterranean
ecosystems

Abed El Rahman Hassoun1, Meryem Mojtahid, Mohammad Merheb, Piero Lionello, Jean-Pierre Gattuso & Wolfgang Cramer
Mediterranean open marine and coastal ecosystems face multiple risks that impact their unique biodiversity, with climate change representing a major ongoing threat. While these ecosystems are also under pressure from non-climatic anthropogenic drivers (e.g., overfishing, pollution), this study primarily focuses on risks related to climate change. To assess these risks and evaluate their confidence levels, we adopt the scenario-based approach of the Intergovernmental Panel on Climate
Change (IPCC), relying on a review of literature projecting changes in Mediterranean Sea ecosystems.
The main drivers of environmental change are sea level rise, ocean warming and acidification. Similar to global conditions, all Mediterranean ecosystems face high risks under all climate scenarios, with coastal ecosystems being more strongly impacted than open marine ecosystems. For these coastal ecosystems, risk levels are expected to become very high already once global warming exceeds 0.8 °C with respect to the 1976–2005 period. A few Mediterranean ecosystems (e.g., coralligenous and rocky coasts) are relatively more resilient compared to others, probably because of their long evolutionary history and the presence of a variety of climatic and hydrological conditions. However, high-emission scenarios in specific sub-basins, in addition to acidification impacts, could reduce this resilience, decreasing both habitat extent and ecosystem function dramatically. Overall, due to the higher observed and projected rates of climate change in the Mediterranean, compared to global trends, for
variables such as seawater temperature and pH, marine ecosystems (particularly coastal) are projected to be under higher risks compared to the global ocean.
Reposted by Wolfgang Cramer
pmarques35.bsky.social
[1/5] Jérôme Morinière décrit un tournant dans la lutte contre les algues vertes en Côtes-d’Armor. Sur 1300 exploitations situées dans les trois baies touchées, près de 300 ne respectent pas les engagements de réduction des nitrates. Des sanctions pourraient tomber dès 2026. #geography #Brittany
Lutte contre les algues vertes : l’étau se resserre pour 300 exploitations dans les Côtes-d’Armor
Le comité départemental de lutte contre les algues vertes se réunit jeudi 9 octobre 2025. Alors que la saison algues vertes 2025 a donné des résultats encourageants, en Côtes-d’Armor, avec une baisse ...
www.ouest-france.fr
Reposted by Wolfgang Cramer
pmarques35.bsky.social
[1/8] Annah Lake Zhu (Univ. Wageningen) et Amadou Ndiaye (Univ. Mahtar Mbow) évaluent l’impact réel de la Grande Muraille Verte africaine. Leur étude montre que, malgré 20 milliards $ promis depuis 2007, la reforestation au Sénégal reste très limitée. #geography #GreatGreenWall #Sahel
Africa’s ‘great green wall’ is stalling: in Senegal very few planted areas show progress
Africa’s Great Green Wall of 6,000km of trees was launched 18 years ago, promising to halt desertification. But in Senegal, it’s been very slow to progress.
theconversation.com
Reposted by Wolfgang Cramer
dougparr.bsky.social
Carbon offsetting suffers from deep-seated systemic problems that incremental change will not solve says review paper from Oxford Uni

“We have assessed 25 years of evidence and almost everything up until this point has failed”

www.theguardian.com/environment/...
Carbon offsets fail to cut global heating due to ‘intractable’ systemic problems, study says
Analysis of 25 years of evidence shows most schemes are poor quality and fail to lower emissions
www.theguardian.com
wolfgangcramer.net
no further explanation needed
Foldable bicycle near the beach of the Baltic, Warnemünde, Germany
Reposted by Wolfgang Cramer
markvmd.bsky.social
Carbon capture is the filtered cigarette of our time
Reposted by Wolfgang Cramer
globalecoguy.bsky.social
We have decided to ban the use of GenAI for research, writing & creative work at our organization.

In fact, we make people sign an agreement saying that their research, analysis, writing, and creative work are *theirs* and not done by GenAI.
Reposted by Wolfgang Cramer
scientifiquesenrebellion.fr
Cet acharnement judiciaire contre des scientifiques ayant mené des actions essentiellement symboliques illustre une dynamique dangereuse plus large de répression des mouvements écologistes dénoncée par @amnestyfrance.bsky.social et le rapporteur spécial des Nations Unies @michelforst.bsky.social.
Reposted by Wolfgang Cramer
scientifiquesenrebellion.fr
Le 10 octobre, 4 membres de @scientifiquesenrebellion.fr et de @xrfrance.bsky.social comparaîtront devant la Cour d’appel de Paris, suite à une action au Muséum national d'histoire naturelle en 2022. Le parquet avait fait appel de la relaxe au nom de l'état de nécessité en première instance.
Reposted by Wolfgang Cramer
scientifiquesenrebellion.fr
Le 7 octobre, six scientifiques français·es comparaîtront devant le tribunal de district de Munich suite à des actions menées contre BMW et BlackRock en 2022 lors d'une campagne internationale de @scientistrebellion.bsky.social. Des amendes allant jusqu’à 12 800 euros ont été requises !
Reposted by Wolfgang Cramer
scientistrebger.bsky.social
This October, two scientist trials will be held in France and Germany.

In April 2022, around thirty scientists and activists took over a gallery at the National Museum of Natural History in Paris to raise awareness, without violence, damage or public disturbance.

In October 2022, ...

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Sustainability Café
What can we learn from non-violent climate action?
Beliefs, values, consequences.
Monday, Oct 6th, 2025 | 7:00pm
Room 3220 | Leopoldstr. 13, München
Scientists from the climate action group
ScientistRebellion (SR) will face trial
on October 7 in Munich.
Join our café night to hear about their experiences in climate activism and to exchange ideas about climate action.
The event is open to everyone interested-especially students and academic staff.
Reposted by Wolfgang Cramer
scientifiquesenrebellion.fr
Historique : alors que la COP30 et les dix ans de l'Accord de Paris sur le climat approchent, dix scientifiques passeront en procès en France et en Allemagne cette semaine pour avoir alerté sur la crisé écologie en cours !
Une scientifique en blouse blanche portant une pancarte « Climate crisis = Health Crisis. Scientist Rebellion » encadrée par quatre policiers allemands en uniforme portant la mention « polizei ». Une douzaine de scientifiques en blouse blanche tenant une banderole « Dire la vérité n'est pas un crime » et des drapeaux Extinction Rebellion dans une salle du Muséum national d'histoire naturelle, devant plusieurs squelettes dont un de mammouth.
wolfgangcramer.net
Ganz klar ein Winzer der boykottiert gehört.
Reposted by Wolfgang Cramer
Reposted by Wolfgang Cramer
bonpote.com
Arrêtée par l'armée israélienne, Greta Thunberg a été tirée par les cheveux, battue et forcée d'embrasser le drapeau israélien.

Soutien à Greta dont le courage et l'engagement pour dénoncer le génocide sont sans faille depuis bientôt 2 ans.
Reposted by Wolfgang Cramer
maxkoch.bsky.social
“They dragged little Greta [Thunberg] by her hair before our eyes, beat her, and forced her to kiss the Israeli flag. They did everything imaginable to her, as a warning to others”

According to another observer, she was “wrapped in the Israeli flag and paraded like a trophy”
Israel accused of detaining Greta Thunberg in infested cell and making her hold flags
Activist tells Swedish officials she has been subjected to harsh treatment, including insufficient food and water
www.theguardian.com
Reposted by Wolfgang Cramer
leadohm.bsky.social
Ganz, ganz übel. Und wie schön wäre es, wenn die SPD mal wieder eine Sozialpolitik angeht, die Menschen in schwierigen Lagen real positiv erreicht?
Das betrifft auch sehr viele psychisch Erkrankte. Wohnen ist ein Grundrecht.
www.fr.de/wirtschaft/b...
Bürgergeld-Reform von Bas verschärft Wohnungsnot: Expertinnen warnen – „Nicht bedacht“
Der Gesetzesentwurf zur Bürgergeld-Reform sieht vor, die Karenzzeit für Wohnungen zu streichen. Die Sozialverbände kritisieren diese Maßnahme scharf.
www.fr.de
Reposted by Wolfgang Cramer
pmarques35.bsky.social
[1/8] 🔒 Thomas Piketty (École des hautes études en sciences sociales) appelle l’Europe à rompre avec le libre-échange absolu. Face à la montée du protectionnisme américain, il défend une refondation écologique et sociale du commerce mondial. #geography #trade #Europe
Thomas Piketty : « Si l’Europe n’abandonne pas sa religion du libre-échange, elle court le risque d’un désastre social et industriel »
CHRONIQUE. Dans sa chronique, l’économiste appelle l’Union européenne à instaurer des droits de douane en vue de taxer le CO₂ du transport de marchandises et de contrer les ravages du dumping chinois.
www.lemonde.fr
wolfgangcramer.net
🚂 A peine lancés et déjà supprimés ? Sauvons les trains de nuit Paris-Berlin et Paris-Vienne, un voyage bas-carbone largement plébiscité par ses utilisateurs
agir.greenvoice.fr/petitions/sa...
🚂 Sauvons les trains de nuit Paris-Berlin et Paris-Vienne
Signez la pétition maintenant !
agir.greenvoice.fr
Reposted by Wolfgang Cramer
kuminaidoo.bsky.social
“A picture paints a thousand words.” 🕊️❄️

Deep gratitude to Pope Leo XIV for this powerful reminder through art and spirit: if we do not act now, we risk destroying not only our present but also our past and our future.
Reposted by Wolfgang Cramer
alterneteurope.bsky.social
"We didn’t just learn; we built bonds across disciplines, cultures, and generations that I know will last far beyond Peyresq."

2025 Alternet Summer School alum Songül Sönmez shares reflections on her experience in Peyresq. 🌞 Read her testimonial here: alterneteurope.eu/updates/testimonial2025/
Alternet Summer School Testimonial by Songül Sönmez - Alternet
How To Build a “Network for Life” an Alternet Summer School Student Testimonial by Songül Sönmez How do you build a Network for Life? Recipe: ✨ Bring together early-career researchers...
alterneteurope.eu
Reposted by Wolfgang Cramer
dpcarrington.bsky.social
Pope Leo condemns climate change critics

- "Some have chosen to deride the increasingly evident signs of climate change, to ridicule those who speak of global warming, and even to blame the poor"

Story by @mattmcgrathbbc.bsky.social
HT @carbonbrief.org
www.bbc.co.uk/news/article...
Pope Leo hits out at critics of global warming
In his first major statement on climate change, the pontiff criticises those who minimise climate change.
www.bbc.co.uk