The churning seas are slowing down: The Atlantic Ocean circulation at its weakest in millennia

In the Atlantic Ocean there is a giant “river” that affects many aspects of life for us terrestrial dwellers, from the regional climates we enjoy to the sea level at our shore. This “river” is the Atlantic Meridional Overturning Circulation (AMOC), one of the planet’s major ocean circulation systems. The ocean has been churning for millenia through this circulation system, but now there are signs of change.

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Increasing Temperatures and Decreasing Insect Populations

Without insects, we wouldn’t have all of the edible plants that we rely on as important parts of our diets and entire ecosystems would be in trouble. Despite their importance, insects face many threats, including climate change. Through a literature review, a group of scientists found that increasing temperatures due to climate change and the resulting ecosystem changes are a leading cause of insect population declines globally. Some species have disappeared completely. However, different species respond to climate change differently. Monitoring and understanding their responses can help us prevent their loss.

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The “Heartbreaking” Effect of Algal Blooms – Heart disease and the Southern Sea Otter

Our favorite hand-holding marine mammals, sea otters, are threatened by environmental toxins. Chemicals produced by algae blooms move up the food chain and cause a multitude of diseases in top predators. A new study documented how algae blooms cause heart disease in sea otters, what this means for our own seafood consumption, and proposes solutions to our pollution.

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Dead plants breathe new life into botanical research

I’ll never forget the first time that I stepped into a herbarium. Picture a room full of towering metal cabinets. Inside, there are thousands of pressed plants carefully glued onto special paper upon which thoughtfully recorded field notes describe the plant’s habitat, location, life stage, and more. At a moment’s notice I can still recall the unique smell of preserved plants, reminiscent of the comforting scent that lofts when ruffling the pages of an old book. In those days, as a budding botanist, I never questioned the immense value of these collections. Then, when I learned that one herbarium in seven has closed in the last twenty-five years (Deng 2015), I realized that we simply aren’t talking enough about all the unique ways that old plants can fuel modern science.

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Industrial Revolution Pollution Suppresses Succession in Lichen Communities

Lichens are indicators of air pollution and ecosystem health. In London parks, researchers found that historical pollution may have decreased the lichen diversity. Sulfur emissions from the Industrial Revolution and modern nitrogen emissions stall the growth of lichens on urban trees hinting at larger effects on ecosystem health.

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