Josephine Z. Rapp

"These changes threaten water supply and infrastructure for billions of people"

@leti-polar.bsky.social, @zoraur0ra.bsky.social, and @pxh.bsky.social warn that the Earth’s frozen regions are approaching irreversible tipping points, and call for urgent action at COP30: www.landclimate.org/...

18.11.2025 12:59 — 👍 5    🔁 4    💬 1    📌 2

Phyloecology of sea ice bacteria and archaea This chapter takes a phylogenetic ecological approach to the introduction to sea ice microbes by weaving together our current knowledge of the diversity, distribution, and functions of individual tax....

Never thought I’d end up writing a chapter for my favorite textbook from my student days ❄️📚 Honored to co-author Chapter 11 "Phyloecology of sea ice bacteria and archaea" in the 4th edition of Sea Ice. Huge thanks to my awesome co-authors! doi.org/10.1002/9781...

#SeaIce #Microbes

23.08.2025 17:00 — 👍 7    🔁 3    💬 0    📌 0

Life in the Frozen Ocean | Annual Reviews Present seasonally or year-round in polar and subpolar seas, sea ice is one of the most complex and biologically rich ecosystems on Earth. Throughout the history of our planet, sea ice has periodicall...

Our new review "Life in the Frozen Ocean" is out in Annual Review of Marine Science — on microbes, algae & viruses thriving in sea ice, and what this reveals about evolution and life beyond Earth. Plus: my favorite figure I’ve ever drawn! ❄️🧬🌌
www.annualreviews.org/content/jour...

#seaice #microbes

04.08.2025 08:20 — 👍 9    🔁 3    💬 0    📌 0

Chemoautotrophy in subzero environments and the potential for cold-adapted Rubisco | Applied and Environmental Microbiology Autotrophy, or the fixation of inorganic carbon to biomass, is a key factor in life’s ability to thrive on Earth. Research on autotrophy has focused on plants and algae, but many bacteria are also aut...

Excited to share our new study exploring chemoautotrophy in subzero Arctic brines. We identified cold-adapted Rubisco enzymes in Thiomicrorhabdus species, suggesting unique adaptations for carbon fixation in extreme conditions. Read more: journals.asm.org/doi/10.1128/... #Microbiology #Astrobiology

02.06.2025 14:13 — 👍 14    🔁 4    💬 0    📌 0

Hi 🧊bsky
I'll be chairing the GRS on Polar Marine Science in Italy this March!
We still have 10 seats available & 5 days left to apply!
Join our ECR community to share your research and discuss the role of sea ice in ecosystem dynamics!

www.grc.org/polar-marine...
#polarresearch #marinescience

03.02.2025 12:02 — 👍 10    🔁 3    💬 0    📌 1