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Archive for March, 2017

Figure 1 from Volkov et al. 2017. Map of path along which deep-ocean temperature measurements were taken in 2005 and 2014 (labeled on map as P16).

Is the Deep Ocean Warming Too?

It’s been shown that the surface of the South Pacific Ocean has been warming by absorbing excess heat from the atmosphere, but is this heat making it down to the deep ocean? Deep-ocean warming can lead to more rapid global warming in the future, but detecting it is tricky. Despite the challenges, a team of researchers shows that the Deep South Pacific has indeed been warming.

Figure 2: A nearly transparent hyperiid amphipod is only visible by its large orange eyes taking up most of its head and a few internal organs. Image credit: National Geographic (http://news.nationalgeographic.com/2016/12/oceans-animals-invisible-physics/)

Now You See Me, Now You Don’t: Using an Invisibility Cloak for Deep-Sea Camouflage

You may not have to go to Hogwarts to find an invisibility cloak of your own. Although, the trip to this extreme environment full of transparent crustaceans may be just as tricky to get to. Read more to find out how hyperiid amphipods are able to make themselves invisible!

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Dawn of the age of Aquarius…total alkalinity measurements

While not as exciting as the new era of peace predicted by 5th Dimension, it is pretty cool that scientists can measure ocean chemistry from space. The marvels of modern technology, amiright?

An Australian Giant Cuttlefish (Sepia apama) crosses a seagrass bed. Shelly Beach, Manly, NSW (Credit: Photo credit: Richard Ling, CC BY-NC-ND)

Seagrasses reduce the risk of disease outbreaks

Seagrasses are one of humans’ greatest sidekicks. They are nursery areas for many species including commercially important ones, they protect coastal communities from extreme weather, they absorb carbon dioxide and release oxygen via photosynthesis and much more. Now, research shows that seagrasses can also reduce rates of disease in humans, fishes and invertebrates such as corals. Read more to find out how!

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Cervezas del Oceano

Traducido y modificado por SANDRA SCHLEIER, Artículo original por ERIN MCLEAN Como una persona que aprecia mucho la cerveza, podemos decir que cualquier día de fiesta, como el Día de San Patricio (St. Patrick’s Day) es una maravillosa excusa para beberla. Uno de mis pasatiempos favoritos y el de mi compañera quien escribió este artículo, […]

Fig. 4: Ringed seal pup. Author: Shawn Dahle, NOAA, Polar Ecosystems Program research cruise. Source: Public Domain, Wikimedia Commons. https://commons.wikimedia.org/wiki/File:Pusa_hispida_pup.jpg

Throwing Babies out with the Sea Ice: Ringed Seals Response to Ice Decline

As the Earth warms, sea ice declines. What happens to those animals who rely on the ice? Today’s oceanbites looks at one animal, the ringed seal, and how it may be affected by climate change!

Conservationists are scrambling to save the species of the world, but where should they start

‘The conservationist is ready to see you’: triaging marine ecosystems in times of climate change

Climate change affects ecosystems worldwide, but how do conservationists decide which of planet earth’s ecosystems are most in need?

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An Ocean in Your Beer

This St. Patrick’s Day, think outside the green beer and whiskey and try an ocean-inspired beer! Didn’t know there were beers brewed with ocean life? Read on to learn more about how our oceans and your beer are intertwined.

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Looking into the crystal ball of statistics, or how number crunching debunks the natural variability argument skeptics love

Have that one relative who always argues that current climate change symptoms are part of natural variability? Check out this article and be prepared with some nifty statistics next time they try to make that claim!

Figure 1: Cows are not the only source of methane! (Source: Jean-Luc Bailleul (own work), via Wikicommons)

More than cow burps: the many sources of methane

Methane is an important, and often forgotten, greenhouse gas. It comes from a variety of sources including wetlands, rice paddies, and natural gas operations. This article explores methane’s role in our changing climate and investigates some natural and anthropogenic sources.

Zostera marina, marine eelgrass (photo by Ronald C. Philips, Wikimedia) https://commons.wikimedia.org/wiki/File:Eelgrass.jpg

Life Finds a Way: Eelgrass Beds Respond in Surprising Ways to Extreme Warming Events

Article: Reynolds LK, DuBois K, Abbott JM, Williams SL, Stachowicz JJ (2016) Response of a Habitat-Forming Marine Plant to a Simulated Warming Event Is Delayed, Genotype Specific, and Varies with Phenology. PLoS ONE 11(6): e0154532. doi:10.1371/journal.pone.0154532 Climate change is poised to dramatically alter the make-up and functioning of Earths’ ecosystems, including those in the oceans. […]

So cute!

It’s a trap! African penguins impacted by climate change

Young penguins living along the southwestern coast of Africa typically follow cool, nutrient rich water to find food as they grow up. This used to lead them to ‘delicious’ fish such as anchovies and sardines. However, in this ecosystem – the Benguela Upwelling Zone – climate change and overfishing have reduced these fish populations. This forces the young penguins to eat less nutritious fish so fewer of them survive to adulthood. This threatens the African penguin’s future. Conservation efforts are needed to ensure this important (and adorable!) species survives.

¿Deberíamos prohibir toda pesca de tiburones?

Traducido por Sandra Schleier, artículo original por MEGAN CHEN Artículo: Simpfendorfer, CA, Dulvy, NK (2017).  Bright spots of sustainable shark fishing.  Current Biology. 27:R83-R102.  doi: dx.doi.org/10.1016/j.cub.2016.12.017 El Reto: Intenta nombrar todas las especies de tiburones que puedas. Aunque solo tendemos a pensar en los tiburones blancos, martillos y toros, existen sobre 1,000 especies de tiburones y sus […]

Cover Photo (source: freakingnews.com)

Hunter-Chiller: Multiple feeding strategies for some of the world’s smallest organisms

Because of their ability to conduct photosynthesis, most of our planet’s oxygen comes from microscopic organisms in the ocean called algae. In addition to photosynthesis, some of these algae can also hunt and consume prey to supplement their energy needs. In this study a group of scientists has set out to determine just how their hunting strategy works, and why each strategy has its own set benefits and drawbacks.

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Oceans absorb more carbon with weaker ocean circulation

A team of researchers investigate why the ocean has been absorbing more carbon from the atmosphere in recent decades, and find ocean circulation could be responsible.

Atlantic cod (Gadus morhua) [Wikimedia]

Now we got bad blood: Oxygen binding is not affected by haemoglobin subtype in Atlantic cod

Why do northern and southern populations of Atlantic cod have different haemoglobin subtypes? A recent study upsets over 50 years of theory.

Container Ship Departing New York Harbor

MARPOL-ling in the Right Direction

Posted by Steven Koch Research article: Zetterdahl, M., Jana Moldanov, J., Xiangyu Pei, X., Pathak, R. K., Demirdjian, B. (2016). Impact of the 0.1% fuel sulfur content limit in SECA on particle and gaseous emissions from marine vessels. Elseveir, Atmospheric Environment, 145 (2016) 338-345. doi: http://dx.doi.org/10.1016/j.atmosenv.2016.09.022 Background Air pollution is an important issue that adversely […]

An anatomically incorrect sketch of an elasmosaurian plesiosaur. Sketched by Charles Robert Knight, 1897.

A look into the past…and into a gnarly set of teeth

New discoveries are made every day, but ‘new’ does not always mean current. In this case, scientists are using technology to reconstruct the jaws of a creature that dominated the oceans over 70 million years ago and are solving the mystery of how its strange teeth allowed for a diverse diet. Intrigued?

A Greenland ice core segment, extracted from the ice sheet. Ice cores trap past climate conditions, allowing researchers to study paleoclimates. Credit: wikicommons.

The Bipolar See-Saw: Dansgaard-Oeschger Events and the Antarctic Climate

Within large timescales of glacial and interglacial periods, mini, rapid climate shifts may occur thanks to oceanic circulation processes and balancing global ocean budgets. The events in question originate in the North Atlantic; but, how do they affect the Antarctic?

Sharks, tuna and barracuda at a fish market in Oman (Image credit: piknik via flickr, CC BY-NC-ND).

Should all shark fishing be banned?

It might seem like a no-brainer to ban shark fishing as well as the sale and trade of shark products. But scientists wonder: is there a more effective management strategy? Read more to find out!

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