Samantha Rumschlag

PFAS levels in Great Lakes fish are dropping, study finds A new study shows PFAS levels in Great Lakes fish are on the decline as manufacturers have phased out some chemicals in recent decades.

PFAS levels in #GreatLakes fish are dropping, study finds

The declining levels were driven by an industry phase-out of legacy PFAS chemicals

www.wpr.org/news/pfas-le...

06.02.2026 20:10 — 👍 100    🔁 31    💬 0    📌 5

Image of river protection status in the United States

National assessment of river protection in the U.S.

Article: doi.org/10.1038/s418...
Policy Brief: doi.org/10.1038/s418...
Rivers Explorer: map.myriver.americanrivers.org

Collaboration b/t American Rivers, Conservation Science Partners, Univ WA @americanrivers.bsky.social

Thread 👇 | DM for PDF

09.01.2026 18:18 — 👍 38    🔁 25    💬 1    📌 0

Climate change is reshaping fish communities in the United States Rising temperatures and the introduction of non-native fishes have been linked to rapid changes in fish communities across the United States.

How #climatechange is reshaping fish communities in the United States as temperatures rise and non-native fishes proliferate: @ian-vaughan.bsky.social overviews recent extensive work by @rumschsl.bsky.social www.nature.com/articles/d41... www.nature.com/articles/s41...

29.09.2025 10:18 — 👍 18    🔁 7    💬 0    📌 0

Climate change is reshaping fish communities in the United States | Nature Rising temperatures and the introduction of non-native fishes have been linked to rapid changes in fish communities across the United States. Rising temperatures and the introduction of non-native fishes have been linked to rapid changes in fish communities across the United States.

Climate change is reshaping the fish communities of rivers across the US - my commentary in @nature.com to accompany the new study led by @rumschsl.bsky.social rdcu.be/eHY6B 🌍🧪

25.09.2025 19:37 — 👍 21    🔁 8    💬 1    📌 1

Photo of field crew conducting electroshock sampling for fish as part of the US EPA National Rivers and Streams Assessment in Little Hunting Creek in Virginia, USA. Photographer: Kevin Biallas

Changing water temperatures and human-driven introductions of fish have altered the composition of fish populations in streams and rivers across the USA over the past three decades, a study in Nature suggests. go.nature.com/47ZCcWH 🧪

24.09.2025 22:30 — 👍 49    🔁 24    💬 1    📌 0

Diverging fish biodiversity trends in cold and warm rivers and streams - Nature In the past three decades, fish abundance, richness and uniqueness have diverged across cold and warm streams, and the effects on native fish communities of stream warming and increases in introduced fishes have magnified each other.

Fish communities in US rivers have changed a lot since the 1990s, linked to climate change and species introductions - new research in @nature.com led by @rumschsl.bsky.social www.nature.com/articles/s41...

25.09.2025 17:44 — 👍 1    🔁 1    💬 1    📌 0

Really enjoyed your article! Thanks! Thought you made great points about limitations and future/alternative analyses.

25.09.2025 18:43 — 👍 0    🔁 0    💬 1    📌 0

Sometimes you set out to ask one question and you end up addressing something different. Here is an example of that where we set out to synthesize US biomonitoring data and pesticide data and ended up asking a biodiversity question. Fun working with this team!

24.09.2025 20:48 — 👍 7    🔁 1    💬 0    📌 0

Our research group just published a study in Nature on how fish biodiversity in U.S. rivers and streams has been changing over the past 27 years (1993–2019). The results show sharply diverging trends depending on historic and changing water temperature. 🧵 rdcu.be/eH0l8

24.09.2025 17:08 — 👍 39    🔁 12    💬 1    📌 3

Diverging fish biodiversity trends in cold and warm rivers and streams - Nature In the past three decades, fish abundance, richness and uniqueness have diverged across cold and warm streams, and the effects on native fish communities of stream warming and increases in introduced fishes have magnified each other.

Exciting collaboration with colleagues from the US and Frederik de Laender - lead by S. Rumschlag and Mike Mahon - on how climate change has lead to alterations in US fish diversity over the last decades. Paper just out: www.nature.com/articles/s41...

24.09.2025 16:20 — 👍 9    🔁 6    💬 2    📌 0