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food webs

Un lago rodeado por montañas rocosas
Posted inNews

El ADN de los sedimentos lacustres revelan el impacto de los peces introducidos

by Jasmin Galvan 5 March 20255 March 2025

La trucha no nativa ha alterado la diversidad del zooplancton que habita en los lagos de gran elevación.

A lake surrounded by rocky mountains
Posted inNews

DNA in Lake Sediment Reveals the Impact of Introduced Fish

by Jasmin Galvan 13 December 20245 March 2025

Non-native trout have altered the diversity of zooplankton that live in high-elevation lakes.

Aerial image of a small stingray in a wide area of open water
Posted inNews

Hungry Stingrays Shift Serious Amounts of Sediment

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 14 August 202414 August 2024

While digging for food on estuary bottoms, rays push around literally tons of sediment, changing their habitat in profound ways.

A man holds a clear cylinder that is about 3 feet tall and holds ocean sediment and water.
Posted inNews

Toxic Metal on the Rise in the Baltic Sea

by Amy Mayer 17 June 202417 June 2024

Postwar reconstruction is likely the cause of elevated thallium levels, but low-oxygen, high-sulfide conditions keep the material, which is extremely dangerous to mammalian health, from moving into the human food chain.

A large, goose-shaped lake stretches across Canada’s Northwest Territories. Two red circles and two yellow triangles mark sites where samples were taken from the lake, and the Slave River and the Hay River are both labeled.
Posted inNews

Arctic Warming Triggers Abrupt Ecosystem Shift in North America’s Deepest Lake

Cheryl Katz, Science Writer by Cheryl Katz 24 October 202330 October 2023

Great Slave Lake’s huge cold water mass shielded it from impacts of the rapidly warming climate—until now.

The Sun rising above Arctic sea ice; view of a meltwater pond and pressure ridges in the foreground
Posted inNews

Arctic Ice Loss Could Shorten Winter Feeding Time for Zooplankton

by Veronika Meduna 2 October 20232 October 2023

The Arctic’s thinning sea ice allows more light to penetrate deeper into the ocean, holding zooplankton far beneath the surface.

A bright green, oval-shaped organism with short hairs protruding from its exterior is surrounded by smaller circular organisms.
Posted inNews

Ambidextrous Microbes May Pump Out CO2 as Temperatures Rise

Katherine Kornei, Science Writer by Katherine Kornei 7 July 20237 July 2023

Certain microbes that engage in both photosynthesis and predation are more likely to do the latter as the planet warms, resulting in a net release of carbon dioxide.

A group of penguins stand on ground streaked with yellow-white droppings. The sea is in the background.
Posted inNews

Penguin Poop May Flush Iron into the Southern Ocean

by Carolyn Wilke 23 May 202323 May 2023

Nutrients from the seabirds’ guano fuels the growth of carbon-storing phytoplankton, but penguin populations have plunged in the past 4 decades.

View through a microscope of yellow spheres and white shapes with thin lines
Posted inNews

Marine Life May Be Headed to Higher Latitudes

by Mackenzie White 19 April 202319 April 2023

Researchers tracked plankton through a changing climate over 8 million years. Now, that knowledge is helping scientists understand the coming effects of warming oceans.

A collage of different diatom species
Posted inNews

Ocean Acidification May Drive Diatom Decline

by Clarissa Wright 28 June 202212 September 2022

Diatoms contribute to global oxygen production, marine food webs, and carbon sequestration, but scientists predict that diatom populations will decline due to ocean acidification associated with climate change.

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