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Transcriptome and biomineralization responses of the pearl oyster Pinctada fucata to elevated CO2 and temperature

Ocean acidification and global warming have been shown to significantly affect the physiological performances of marine calcifiers; however, the underlying mechanisms remain poorly understood. In this study, the transcriptome and biomineralization...Show More Summary

Effects of high CO2 levels on the ecophysiology of the diatom Thalassiosira weissflogii differ depending on the iron nutritional status

Iron availability in seawater, namely the concentration of dissolved inorganic iron ([Fe?]), is affected by changes in pH. Such changes in the availability of iron should be taken into account when investigating the effects of ocean acidification on phytoplankton ecophysiology because iron plays a key role in phytoplankton metabolism. Show More Summary

Future ocean hypercapnia driven by anthropogenic amplification of the natural CO2 cycle

High carbon dioxide (CO2) concentrations in sea-water (ocean hypercapnia) can induce neurological, physiological and behavioural deficiencies in marine animals1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Prediction of the onset and evolution of hypercapnia in the ocean requires a good understanding of annual variations in oceanic CO2 concentration, but there is a lack […]

Genotypic variation influences tolerance to warming and acidification of early life-stage Fucus vesiculosus L. (Phaeophyceae) in a seasonally fluctuating environment

Global change exposes brown algal Fucus vesiculosus populations to increasing temperature and pCO2, which may threaten individuals, in particular the early life-stages. Genetic diversity of F. vesiculosus populations is low in the Baltic compared to Atlantic populations. Show More Summary

#TBT to young penguin Rey enjoying the sights and sounds of the Aquarium.Rey was hatched here as a...

#TBT to young penguin Rey enjoying the sights and sounds of the Aquarium. Rey was hatched here as a part of Association of Zoos and Aquariums Species Survival Plan—a program that aims to help with the genetic health of their wild cousins. Show More Summary

NOAA webinar: “Why are there so many ‘pH scales’ for measuring seawater ‘pH’ – What do these scales mean for measuring or using seawater ‘pH’?”, 26 January 2016

Date & time: 26 January 2016, 2pm – 3pm Registration: http://tinyurl.com/j4f4s4r Speaker: Andrew Dickson (SIO) Abstract: pH is an important property of aqueous solutions because it affects a wide variety of chemical and biochemical properties through its role in acid-base reactions. This importance and the ease of pH measurement are the reasons why pH is […]

Lack of genetic variation in the response of a trematode parasite to ocean acidification

Ocean acidification is already having measurable impacts on marine ecosystems. Intraspecific variation in the responses of marine organisms to ocean acidification can reveal genetic differences in tolerance to low pH conditions and determine the potential for a species to adapt to a changing environment. This study tests for the existence of genetic variation in both […]

Rapid anthropogenic changes in CO2 and pH in the Atlantic Ocean: 2003-2014

The extended multi-linear regression (eMLR) method is used to determine the uptake and storage of anthropogenic carbon in the Atlantic Ocean based on repeat occupations of 4 cruises from 1989–2014 (A16, A20, A22, and A10), with an emphasis on the 2003–2014 period. The results show a significant increase in basin wide anthropogenic carbon storage in […]

Echinometra sea urchins acclimatised to elevated pCO2 at volcanic vents outperform those under present-day pCO2 conditions

Rising atmospheric CO2 concentrations will significantly reduce ocean pH during the 21st century (ocean acidification, OA). This may hamper calcification in marine organisms such as corals and echinoderms, as shown in many laboratory-based experiments. Show More Summary

Transgenerational responses of molluscs and echinoderms to changing ocean conditions

We are beginning to understand how the larvae of molluscs and echinoderms with complex life cycles will be affected by climate change. Early experiments using short-term exposures suggested that larvae in oceans predicted to increase in acidification and temperature will be smaller in size, take longer to develop, and have a greater incidence of abnormal […]

Host-associated coral reef microbes respond to the cumulative pressures of ocean warming and ocean acidification

Key calcifying reef taxa are currently threatened by thermal stress associated with elevated sea surface temperatures (SST) and reduced calcification linked to ocean acidification (OA). Here we undertook an 8 week experimental exposure...Show More Summary

When, not if: the inescapability of an uncertain climate future

Climate change projections necessarily involve uncertainty. Analysis of the physics and mathematics of the climate system reveals that greater uncertainty about future temperature increases is nearly always associated with greater expected damages from climate change. Show More Summary

Physiological response to elevated temperature and pCO2 varies across four Pacific coral species: Understanding the unique host+symbiont response

The physiological response to individual and combined stressors of elevated temperature and pCO2 were measured over a 24-day period in four Pacific corals and their respective symbionts (Acropora millepora/Symbiodinium C21a, Pocillopora...Show More Summary

A mesocosm concept for the simulation of near-natural shallow underwater climates: The Kiel Outdoor Benthocosms (KOB)

Biogenic, seasonal, and stochastic fluctuations at various scales characterize coastal marine habitats and modulate environmental stress. The relevance of most past studies into climate change impacts is weakened by the usually intentional exclusion of fluctuations from the experimental design. Show More Summary

Shifts in shell mineralogy and metabolism of Concholepas concholepas juveniles along the Chilean coast

Along the west coast of South America, from the tropical zone to the Patagonian waters, there is a significant latitudinal gradient in seawater temperature, salinity and carbonate chemistry. These physical–chemical changes in seawater...Show More Summary

It’s Penguin Awareness Day! Are you aware that wild African penguin colonies are down over 60%...

It’s Penguin Awareness Day! Are you aware that wild African penguin colonies are down over 60% from heir historic numbers? While several factors contribute to their endangered status (from guano collection to oil spills), one you can...Show More Summary

sciencefriday: Happy Penguin Awareness Day! Here’s Ira...

sciencefriday: Happy Penguin Awareness Day! Here’s Ira interviewing some Antarctic experts in 1979.

Where is the best place to put your ocean cleanup device? Not where currently proposed.

You might think that to clean up the problem of plastic in the ocean, you should place your cleanup device where there is the most plastic. And this isn’t a horrible initial assumption, which has been made by “The Ocean Cleanup”. But a slick new modeling study by Peter Sherman and Erik van Sebille show […]

Der kleine Bruder des Klimawandels (audio & text, in German)

Der ph-Wert der Meere sinkt. Seit Beginn der Industrialisierung haben die Ozeane knapp die Hälfte des Kohlendioxids aus der Verbrennung fossiler Energieträger aufgenommen. Welche Folgen die Versauerung für Meeresorganismen hat, untersucht ein Kieler Forscherteam. Show More Summary

An integrated coral reef ecosystem model to support resource management under a changing climate

Millions of people rely on the ecosystem services provided by coral reefs, but sustaining these benefits requires an understanding of how reefs and their biotic communities are affected by local human-induced disturbances and global climate change. Show More Summary

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