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anthropogenic

This tag is associated with 30 posts

Are Fisheries Scientists Ringing the Dinner Bell for Marine Mammals?

Acoustic telemetry is a valuable technique used by fisheries scientists to track fish movements. However, a new study suggests that these anthropogenic signals may make tagged fish an easy target for marine mammal predators like dolphins and seals. Derrick AlcottDerrick is pursuing a Ph.D. in the Organismic and Evolutionary Biology Program at the University of […]

The Great Barrier Reef is worth $15 billion – $20 billion AUS a year: A quick lesson in ecosystem economics

When discussing the value of an ecosystem, tensions run high. Some people evaluate ecosystems with heavy emphasis on non-use values, like aesthetics and spiritual appreciation. Other people value ecosystems based on things like natural resource availability and the potential for direct monetary revenue. It is difficult to assess the relative importance (or value) of these […]

Catfish sharks on catnip? Nope, just ocean acidification

Researchers from the University of Gothenburg in Sweden found that ocean acidification may cause hyperactivity in catfish sharks. Lis HendersonI am studying for my doctoral degree at the Stony Brook University School of Marine and Atmospheric Sciences. My research addresses fisheries and climate change in the Northwest Atlantic. In my free time, I like to […]

Deep Blue Reads: The Sixth Extinction, by Elizabeth Kolbert

As a novelist writing about oceanography, I spend a decent amount of time parsing scientific studies. Over the past several years my vocabulary has expanded to include terms like band saturation, turbidity currents, and foraminifera—phrases and words that had not existed in my wildest dreams when I first started writing. I’ve relied on studies and […]

Too much acid in the mahi: Ocean acidification and larval dolphinfish

How will increased atmospheric carbon dioxide affect your dinner? Larval dolphinfish (or, ‘mahi mahi’) are apparently very sensitive to increased ocean acidification, a product of rising atmospheric CO2. This is one of the first studies of the effects of ocean acidification on the early life stage of a pelagic fish species. Lis HendersonI am studying […]

Fight of the Century: CO2 vs. Calcifying Phytoplankton

From the very first sentence of the abstract, these scientists make clear they are not messing around, “Ocean acidification is a result of the uptake of anthropogenic CO2 from the atmosphere into the ocean and has been identified as a major environmental and economic threat.” In other words, humans are causing ocean acidification and the […]

The problem with data sets: Cuvier’s beaked whales vs. Navy acoustic testing

Congratulations on the longest and deepest dive EVER! Please, ignore the regular acoustic testing…. The elusive Curvier’s beaked whale (Ziphius cavirostris) is officially the deepest diver in the sea mammal community, annihilating both the sperm whale and southern elephant seal for the illustrious title. Until now, its diving abilities have been underestimated owing to the […]

Baby Beluga is at Heightened Risk: Pollutant Accumulation in Arctic Predators Affects Gene Expression

Analyzing changes in gene transcription is a way to detect adverse effects in organisms before they are observable on the whole organism level. Here, a Canadian research group set out to determine whether beluga whales in the relatively pristine Beaufort Sea are accumulating toxic pollutants at levels that could affect the future health of the […]

Now you see it, now you don’t!

BRMs (Burial Recording Mines) are cylindrical instruments that capture 4-D data of small scale sediment position on the sea floor in intervals as close as every 15 minutes. Scientists can use the information they collect to model the evolution of sediment geomorphology on the sea floor in response to normal and extreme conditions and use […]

Waiter, there’s a whale in my soup: investigating the South Pacific garbage patch

Plastic debris has been found in both the North Pacific and North Atlantic since the early 1970s. It accumulates in naturally forming gyres located in the subtropical zones of the world’s oceans, creating a “plastic soup.” Recent investigations have confirmed the presence of a similar garbage patch in the South Pacific. Zoe RugeI have a […]

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