Blog Profile / Ocean Acidification

Filed Under:Biology / Marine Biology
Posts on Regator:4713
Posts / Week:19
Archived Since:July 23, 2010

Blog Post Archive

Threatened Caribbean coral is able to mitigate the adverse effects of ocean acidification on calcification by increasing feeding rate

Global climate change threatens coral growth and reef ecosystem health via ocean warming and ocean acidification (OA). Whereas the negative impacts of these stressors are increasingly well-documented, studies identifying pathways to resilience are still poorly understood. Show More Summary

SOCAN webinar: “Crumbling Coral: Cold-water Reefs in the Acidic Northeast Pacific and their Implications for Other Regions of the USA”, 5 May 2015

Date & time: Tuesday, 5 May 2015, 12:00 pm ET Speaker: R. Christopher Chambers, Research Fishery Biologist, NOAA Northeast Fisheries Science Center, Howard Marine Sciences Laboratory, Highlands, New Jersey Registration: ...Show More Summary

Quantifying the influence of CO2 seasonality on future ocean acidification

Ocean acidification is a predictable consequence of rising atmospheric carbon dioxide (CO2), and is highly likely to impact the entire marine ecosystem – from plankton at the base to fish at the top. Factors which are expected to be impacted include reproductive health, organism growth and species composition and distribution. Predicting when critical threshold values […]

Optimising methodology for determining the effect of ocean acidification on bacterial extracellular enzymes

To fully understand the impact of ocean acidification on biogeochemical cycles, the response of bacterial extracellular enzymes needs to be considered as they play a central role in the degradation and distribution of labile organic matter. Show More Summary

Antarctic seafloor ocean acidification measured for first time by Australian divers

Scientists have dived under the Antarctic ice to complete the world’s first seafloor ocean acidification experiment in Antarctica – and findings show life in the deep appears to have changed in response to the acidic water. The team from the Australian Antarctic Division Project were looking to study the impact of ocean acidification on marine […]

Rising carbon dioxide levels stunt sea shell growth

Scientists have discovered that stunted growth can be a genetic response to ocean acidification, enabling some sea creatures to survive high carbon dioxide levels, both in the future and during past mass extinctions. Using natural CO2 seeps as test sites, the international team of marine scientists and palaeontologists have studied the way in which sea […]

Acidifying oceans could affect sea life, visiting researcher warns

Rising carbon emissions causing acidifying oceans will affect humans, a visiting researcher warns. Doctoral candidate and former Craighead Diocesan School student Allanah Paul spoke at Aoraki Polytechnic in Timaru on Monday about the effects of Earth’s oceans absorbing carbon dioxide. Paul, who has been studying for a PhD at the GEOMAR Helmholtz Centre for Ocean Research […]

Miniature sea snails found in acidic sea near volcanic seeps

It’s the survival of the smallest. As ocean acidification begins to bite, some marine species might adapt by shrinking – threatening the profitability of commercial fisheries. Carbon dioxide emissions lead to ocean acidification. When...Show More Summary

Physiological advantages of dwarfing in surviving extinctions in high-CO2 oceans

Excessive CO2 in the present-day ocean–atmosphere system is causing ocean acidification, and is likely to cause a severe biodiversity decline in the future1, mirroring effects in many past mass extinctions2, 3, 4. Fossil records demonstrate that organisms surviving such events were often smaller than those before5, 6, a phenomenon called the Lilliput effect7. Here, we […]

Ocean acidification effects on stable isotope signatures and trophic interactions of polychaete consumers and organic matter sources at a CO2 shallow vent system

The U/Ca ratio of aragonite coral skeleton exhibits coherent patterns of seasonal and interannual variability. In field-sampled corals and those grown in controlled culture experiments, strong correlations have been found between coral skeleton U/Ca and water temperature, pH, carbonate ion concentration, and salinity. Show More Summary

Experimental determination of factors controlling U/Ca of aragonite precipitated from seawater: Implications for interpreting coral skeleton

The U/Ca ratio of aragonite coral skeleton exhibits coherent patterns of seasonal and interannual variability. In field-sampled corals and those grown in controlled culture experiments, strong correlations have been found between coral skeleton U/Ca and water temperature, pH, carbonate ion concentration, and salinity. Show More Summary

How marine predators evolved with changing oceans

For more than 250 million years, four-limbed land animals known as tetrapods have repeatedly conquered the Earth’s oceans. Now new research is revealing just how these marine predators successfully evolved amidst this ever-changing environment. Show More Summary

Grant to VIU’s Deep Bay station is a ‘big step forward’ for ocean acidity research

A $667,000 government grant will help VIU Deep Bay Marine Field Station “design a hatchery of the future” mitigating ocean acidification, according to station manager Brian Kingzett. It’s an ambitious goal made possible by a grant announced last week in Nanaimo by the Honourable Michelle Rempel, Minister of State for Western Economic Diversification. Kingzett said […]

Ask the real experts about ocean acidification, not climate science deniers

Scientists review column on ocean acidification in The Australian newspaper and find it was ‘misleading’, ‘very wrong’ and ‘ill informed’. If you try hard enough – and sometimes you don’t have to try hard at all – you can find all sorts of crazyballs evidence-free misleading gumph out there on the intertubes. Many of the […]

The Southern Ocean ecosystem under multiple climate change stresses – an integrated circumpolar assessment

A quantitative assessment of observed and projected environmental changes in the Southern Ocean (SO) with a potential impact on the marine ecosystem shows: (i) large proportions of the SO are and will be affected by one or more climate change processes; areas projected to be affected in the future are larger than areas that are […]

Effect of climate change on crustose coralline algae at a temperate vent site, White Island, New Zealand

Natural CO2 vents allow study of the effects of climate change on marine organisms on a different scale from laboratory-based studies. This study outlines a preliminary investigation into the suitability of natural CO2 vents near White Island, Bay of Plenty, New Zealand (37°31.19?S, 117°10.85?E) for climate change research by characterising water chemistry from two vent […]

Subaqueous soils and coastal acidification: a hydropedology perspective with implications for calcifying organisms

In the coastal zone, biological and biogeochemical processes, influenced by anthropogenic inputs, drive pH variability and contribute to coastal acidification. Spatial patterns of these processes across coastal estuaries are unknown....Show More Summary

Environmental physiology of the jumbo squid, Dosidicus gigas (d’Orbigny, 1835) (Cephalopoda: Ommastrephidae): implications for changing climate

Dosidicus gigas (d’Orbigny, 1835) is a large, active squid that undergoes a diel vertical migration in the Eastern Tropical and Temperate Pacific. It is a voracious predator on zooplankton and micronekton and supports a large fishery. It is further preyed upon by large vertebrate predators, including whales. Its horizontal distribution is closely tied to productive […]

Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System

We tested the sensitivity of the vertical distributions and shell dissolution patterns of thecosome pteropods to spatial gradients associated with an eddy-associated front in the southern California Current System. The aragonite saturation horizon (?arag = 1.0) shoaled from >200 to <75 m depth across the front. Show More Summary

Morphology and classification of hemocytes in Pinctada fucata and their responses to ocean acidification and warming

Hemocytes play important roles in the innate immune response and biomineralization of bivalve mollusks. However, the hemocytes in pearl oysters are poorly understood. In the present study, we investigated the morphology and classification of hemocytes in the pearl oyster, P. Show More Summary

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