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Physiological compensation for environmental acidification is limited in the deep-sea urchin Strongylocentrotus fragilis Anthropogenic CO2 is now reaching depths over 1000 m in the Eastern Pacific, overlapping the Oxygen Minimum Zone (OMZ). Deep-sea animals â particularly, calcifiers â are suspected to be especially sensitive to environmental acidification associated with global climate change. We have investigated the effects of hypercapnia and hypoxia on the deep-sea urchin Strongylocentrotus fragilis, during [â¦]  May 22, 2013 5:47 AM CO2-driven ocean acidification reduces larval feeding efficiency and change food selectivity in the mollusk Concholepas concholepas We present experimental data obtained from an experiment with newly hatched veliger larvae of the gastropod Concholepas concholepas exposed to three pCO2 levels. Egg capsules were collected from two locations in northern and central Chile, and then incubated throughout their entire intra-capsular life cycle at three nominal pCO2 levels, â¼400, 700 and 1000 ppm (i.e. [â¦]  May 22, 2013 5:14 AM Tidal downwelling and implications for the carbon biogeochemistry of cold-water corals in relation to future ocean acidification and warming Cold-water coral (CWC) reefs are recognised as ecologically and biologically significant areas that generate habitats and diversity. The interaction between hydrodynamics and CWCs has been well-studied at the Mingulay Reef Complex, a relatively shallow area of reefs found on the continental shelf off Scotland, UK. Within âMingulay Area 01â a rapid tidal downwelling of surface [â¦]  May 22, 2013 4:47 AM Multiple physiological responses to multiple environmental challenges: an individual approach The injection of anthropogenically-produced CO2 into the atmosphere will lead to an increase in temperature and a decrease in pH at the surface of the oceans by 2100. Marine intertidal organisms possess the ability to cope in the short term with environmental fluctuations exceeding predicted values. However, how they will cope with chronic exposure to [â¦]  May 22, 2013 4:36 AM Effects of ocean warming and acidification on survival, growth and skeletal development in the early benthic juvenile sea urchin (Heliocidaris erythrogramma) Co-occurring ocean warming, acidification and reduced carbonate mineral saturation have significant impacts on marine biota, especially calcifying organisms. The effects of these stressors on development and calcification in newly metamorphosed juveniles (ca. 0.5 mm test diam) of the intertidal sea urchin Heliocidaris erythrogramma, an ecologically important species in temperate Australia, were investigated in context with [â¦]  May 22, 2013 4:29 AM The effect of ocean acidification on early algal colonization stages at natural CO2 vents Marine algae exhibit different responses to ocean acidification, suggesting that a decrease in pH does not always favour marine photosynthetic organisms. In order to understand the effect of acidification on algal community development, early colonization stages were investigated using carbon dioxide vents around the Castello Aragonese (Ischia, Italy) as a natural laboratory. Settlement tiles were [â¦]  May 22, 2013 4:17 AM Arctic rhodolith beds and their environmental controls (Spitsbergen, Norway) Coralline algae (Corallinales, Rhodophyta) that form rhodoliths are important ecosystem engineers and carbonate producers in many polar coastal habitats. This study deals with rhodolith communities from Floskjeret (78°18â²N), Krossfjorden (79°08â²N), and Mosselbukta (79°53â²N), off Spitsbergen Island, Svalbard Archipelago, Norway. Strong seasonal variations in temperature, salinity, light regime, sea-ice coverage, and turbidity characterize these localities. The [â¦]  May 22, 2013 4:05 AM Occurrence of a cold-water coral along natural pH gradients (Patagonia, Chile) Increasing dissolution of anthropogenic-released carbon dioxide into the worldâs oceans is causing ocean acidification (OA). OA is thought to negatively affect most marine-calcifying organisms, notably cold-water corals (CWC), which may be especially sensitive due to the deep and cold waters they normally thrive in. However, the impact of OA on CWC is difficult to predict. [â¦]  May 22, 2013 3:58 AM Results of laboratory and field experiments of the direct effect of increasing CO2 on net primary production of macroalgal species in brackish-water ecosystems Studies on the effects of increasing acidification on marine communities have been previously mostly carried out in truly marine areas whereas brackish-water ecosystems such as the Baltic Sea have been less studied. The current study analyses how acidification induced by elevated atmospheric carbon dioxide affects the photosynthetic net production of different macroalgal species in the [â¦]  May 22, 2013 3:51 AM The central carbon and energy metabolism of marine diatoms Diatoms are heterokont algae derived from a secondary symbiotic event in which a eukaryotic host cell acquired an eukaryotic red alga as plastid. The multiple endosymbiosis and horizontal gene transfer processes provide diatoms unusual opportunities for gene mixing to establish distinctive biosynthetic pathways and metabolic control structures. Diatoms are also known to have significant impact [â¦]  | |||||||||||||
