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USGS study links mercury and stress hormones to seal health markers

A 10-year study of adult female northern elephant seals found associations between mercury, cortisol and several immune, thyroid and reproductive biomarkers.

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https://davids.news/s/usgs-study-links-mercury-and-stress-hormones-to-seal-health-markers-855315b9
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·Single primary source·First edition
  • Researchers analyzed tissue samples and 10 blood biomarkers; the reported relationships varied by marker.
Why it matters

The findings describe links in seals, not proof that mercury or cortisol caused the measured changes.

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U.S. Geological SurveyMercury contamination interacts with stress hormones to influence the immune and endocrine systems of adult northern elephant seals
Primary source · www.usgs.gov

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  1. USGS study links mercury and stress hormones to seal health markers

    1 source group · Primary source included

  2. A 10-year study of adult female northern elephant seals found associations between mercury, cortisol and several immune, thyroid and reproductive biomarkers.

    1 source group · Primary source included

  3. Researchers analyzed tissue samples and 10 blood biomarkers; the reported relationships varied by marker.

    1 source group · Primary source included

  4. The findings describe links in seals, not proof that mercury or cortisol caused the measured changes.

    1 source group · Primary source included
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Science/3 hr agoRead30 sec

USGS study links elephant seal pups’ mercury exposure to mothers’ foraging

The agency says a 10-year collaborative effort examined how maternal foraging strategies affect mercury transfer to offspring.

U.S. Geological SurveyRead briefClose brief
  • USGS researchers studied mercury exposure in northern elephant seal pups before birth and its relationship to their mothers’ ocean foraging.
Why it matters

The findings described by USGS connect maternal foraging behavior with mercury exposure in seal pups in utero.

Single primary sourceU.S. Geological Survey
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Science/6 hr agoRead30 sec

Study estimates wildfires increased water flow in California watershed

A USGS-led model found the 2020 and 2021 fires left more water in soil or streams in the upper Feather River watershed.

U.S. Geological SurveyRead briefClose brief
  • The watershed drains into Lake Oroville, which helps supply water to more than 27 million people, USGS says.
Why it matters

The study examines how fires affected water movement in a watershed that feeds a key part of California’s State Water Project.

Single primary sourceU.S. Geological Survey
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AI-written · AI source-checkedv1
Science/1 hr agoRead30 sec

NASA unveils X-70 experimental aircraft for flight research

The agency says the crewed, reconfigurable aircraft can carry up to 2,000 pounds of research payloads.

NASARead briefClose brief
  • NASA says it expects the aircraft’s first flight under its banner within the next two years.
Why it matters

NASA describes the X-70 as a platform for testing flight-control systems, maneuverability and other aviation technologies.

What’s next

NASA expects the X-70’s first flight within the next two years.

Single primary sourceNASA
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