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Phytoplankton

This tag is associated with 16 posts
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Studying plankton from an atmospheric satellite

Scientists found a way to repurpose data from an atmospheric satellite to study the tiny creatures at the base of most ocean food webs. The instrument, originally designed to study aerosols, allowed researchers to build the most complete record of polar plankton activity ever assembled.

The recent work of Echeveste et al. seeks to provide more realistic information about the impact of POP mixtures on phytoplankton, such as these pennate and centric diatoms from Antarctica. Photo credit: Wikipedia

Not better together: complex pollutant soup spells trouble for marine phytoplankton

A group of international researchers have found that marine phytoplankton communities are susceptible to impairment from complex mixtures of organic pollutants found in oceanic environments.

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Tiny but tough: calcification in marine phytoplankton

Coccolithophores stand out from other marine phytoplankton in their ability to form calcified plates. Why is it beneficial for coccolithophores to calcify and how may these plates hold up under future ocean conditions?

Credit: Gérald Tapp.

Iceberg Buffet: How giant icebergs bring food to plankton

While icebergs are calving from Antarctic glaciers at alarming rates, they may provide a negative feedback for the carbon cycle. Giant icebergs bring large amounts of iron to iron-poor areas of the Southern Ocean, stimulating primary productivity and boosting carbon sequestration.

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Plankton fill up ice-free summer homes

Source: Li, Y., R. Ji, S. Jenouvrier, M. Jin, and J. Stroeve (2016), Synchronicity between ice retreat and phytoplankton bloom in circum-Antarctic polynyas, Geophys. Res. Lett., 43, 2086–2093, doi:10.1002/2016GL067937. Antarctic coasts Despite the dark winters and freezing cold conditions, the coastline of Antarctica is a hotspot for growth of phytoplankton, the tiny, photosynthesizing organisms that […]

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Killer food: the harmful effects of a diatom diet

What if a single bite out of your favorite cheeseburger was toxic to your health? In the ocean, copepods are faced with this issue when they feed on certain types of diatoms. Some diatoms produce toxins as a way to defend themselves from predators. How do these toxins effect hungry copepods?

The ship’s marine technician Mike and I deploying the first SOCCOM float in rough conditions in the Southern Ocean.

Sailing the Southern Ocean for science

Hear about my adventures living on an icebreaker on the Southern Ocean, deploying ocean robots to understand the chemistry and biology of the Southern Ocean.

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Always follow your gut, or in this case, follow the fish guts

Following the guts of fish species is sometimes the best way to track small, mobile crustacean prey.

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Tiny plankton make big clouds brighter

Scientists use ocean color from satellites to show that tiny ocean plankton may be responsible for making clouds brighter around Antarctica.

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Carbon sinks: Diatoms in the deep sea

Fast-sinking phytoplankton particles deliver carbon from the surface to the deep ocean. Are plankton cells still able to survive when they sink to the deep ocean? If so, how long may they survive without any sunlight?

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Time to rethink the role of ocean’s microbes?

Have you ever wondered what may live inside the tiniest drops of seawater? Global oceans are dominated by organisms we cannot even see. Marine microbes are resilient, incredibly diverse, and ecologically important. These microbes deserve a closer look.

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Sewage pollution running amuck in Florida’s Indian River Lagoon

Harmful algal blooms are common events that occur in coastal waters. In Florida’s Indian River Lagoon, nutrient groundwater runoff initiates massive and highly toxic bloom events. Harmful blooms spell trouble for the environmental health and economic value of the lagoon. How bad has this issue become and what can be done to minimize the severity of future blooms?

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Zooplankton versus Phytoplankton: a trophic seesaw

NASA satellites reveal artistic swirls of phytoplankton dancing across the ocean surface. This new study explains the dynamic predator-prey imbalances that occur to create these spectacular space-worthy images.

Figure 3. A coccolithovirus (pink dot) infects an Emiliana huxleyi cell.

Determining viral controls of phytoplankton blooms

Article: Lehahn, Y. et al. Decoupling Physical from Biological Processes to Assess the Impact of Viruses on a Mesoscale Algal Bloom.Current Biology, 2014; DOI: 10.1016/j.cub.2014.07.046 Background Despite their small size, phytoplankton play an incredibly large role in maintaining ocean food webs and can even contribute to global climate. As plants, phytoplankton consume carbon dioxide and fix it […]

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Volcanic ash, fertilizer for the ocean?

Volcanic ash may be an important source of the valuable micronutrients iron and manganese to phytoplankton populations in areas with low chlorophyll, such as the Southern Ocean.

Akashiwo sanguinea featured in the picture is a dinoflagellate, which is a type of phytoplankton that typically produces high concentrations of MAAs. Image taken by Françoise Morison using Flowcam® imaging.

Sunscreen for marine microbes

Humans are not the only species that apply suntan lotion to prevent sunburns. Microbes all over the globe produce their own suntan lotion, called MAAs, to protect themselves from the sun’s harmful rays.

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