Tags » Zooplankton

Withstanding multiple stressors: ephyrae of the moon jellyfish (Aurelia aurita, Scyphozoa) in a high-temperature, high-CO2 and low-oxygen environment

Global change is affecting marine ecosystems through a combination of different stressors such as warming, ocean acidification and oxygen depletion. Very little is known about the interactions among these factors, especially with respect to gelatinous zooplankton. 196 more words


Warm Temperatures and Nutrients May Alter Mercury Contamination in Lakes and Reservoirs

A new US Geological Survey study that was recently featured on Oregon Public Broadcasting is examining why fish in the Hells Canyon Complex of the Snake River have elevated levels of mercury.  385 more words

Development of Euphausia pacifica (krill) larvae is impaired under pCO2 levels currently observed in the Northeast Pacific

Despite the critical importance of euphausiids in marine food webs, little ocean acidification (OA) research has focused on them. Euphausia pacifica is a dominant and trophically important species of euphausiid throughout the North Pacific and the California Current Ecosystem, where low pH conditions are occurring in advance of those in the global ocean. 200 more words


New paper: modeling the sensitivity to climate change

In a new paper out in Scientific Reports, we use a matrix population model to test how sensitive populations of fairy shrimps are to changes in climate. 404 more words

Large Branchiopods

Influence of ocean acidification on a natural winter-to-summer plankton succession: first insights from a long-term mesocosm study draw attention to periods of low nutrient concentrations

Every year, the oceans absorb about 30% of anthropogenic carbon dioxide (CO2) leading to a re-equilibration of the marine carbonate system and decreasing seawater pH. Today, there is increasing awareness that these changes–summarized by the term ocean acidification (OA)–could differentially affect the competitive ability of marine organisms, thereby provoking a restructuring of marine ecosystems and biogeochemical element cycles. 331 more words


Ocean drifters

During your summer vacation on the ocean shore, make a plankton catcher. You need a thin cloth such as a bandana or T-shirt, a clear container and calm water (off a boat dock, from a kayak or wading out beyond the waves). 378 more words

Natural World


— the research teased out these details by using 21,946 fossil specimens from areas of nevada in the us and the yukon in canada that were once ancient sea beds to paint a picture of graptolite evolution.  52 more words