331,477 Works

Catalog artifacts and quality control

Laura Gulia, Stefan Wiemer & Max Wyss

Large scale selective event dissemination

Sidath Handurukande
Event-based systems usually denote distributed infrastructures that are used to asynchronously disseminate information among geographically distant computing units. In these systems, the information sources (a.k.a. publishers) produce events and the system delivers these events to destinations (a.k.a. subscribers). Subscribers are "decoupled" from publishers in the sense that they do not need to know each other or even be "up" at the same time. The subscribers can specify the kind of information they like to receive...

Study of Tolerance of Saccharomyces Cerevisiae Spp. to Phenols of Lignin and High Level of Sugars

S. Vázquez & M.I. Lopretti Correa
Lignocellulosic materials are one of the most important renewable sources for the energy production. Several transformations are crucial for the use of this type of materials. There are several processes that can be use to turn cellulose into sugar, like aerobic conversion by fungi, such as Trichoderma reesei, acid and basic hydrolysis and radiation. By means of these processes a mixture of glucose and xilose is obtained at a concentration of about 10 g/l, which...

Seawater carbonate chemistry and biological processes duirng experiments with bryozoan Myriapora truncata, 2010, supplement to: Rodolfo-Metalpa, Riccardo; Lombardi, Chiara; Cocito, Silvia; Hall-Spencer, Jason M; Gambi, Christina (2010): Effects of ocean acidification and high temperatures on the bryozoanMyriapora truncata at natural CO2 vents, 2010. Marine Ecology, 31(3), 447-456

Riccardo Rodolfo-Metalpa, Chiara Lombardi, Silvia Cocito, Jason M Hall-Spencer & Christina Gambi
There are serious concerns that ocean acidification will combine with the effects of global warming to cause major shifts in marine ecosystems, but there is a lack of field data on the combined ecological effects of these changes due to the difficulty of creating large-scale, long-term exposures to elevated CO2 and temperature. Here we report the first coastal transplant experiment designed to investigate the effects of naturally acidified seawater on the rates of net calcification...

Seawater carbonate chemistry and biological processes during experiments with early life stages of the blue mussel Mytilus edulis, 2010, supplement to: Gazeau, Frédéric; Gattuso, Jean-Pierre; Dawber, Caroline F; Pronker, A E; Peene, F; Peene, J; Heip, Carlo H R; Middelburg, Jack J (2010): Effect of ocean acidification on the early life stages of the blue mussel Mytilus edulis. Biogeosciences, 7(7), 2051-2060

Frédéric Gazeau, Jean-Pierre Gattuso, Caroline F Dawber, A E Pronker, F Peene, J Peene, Carlo H R Heip & Jack J Middelburg
Several experiments have shown a decrease of growth and calcification of organisms at decreased pH levels. There is a growing interest to focus on early life stages that are believed to be more sensitive to environmental disturbances such as hypercapnia. Here, we present experimental data, acquired in a commercial hatchery, demonstrating that the growth of planktonic mussel (Mytilus edulis) larvae is significantly affected by a decrease of pH to a level expected for the end...

Seawater carbonate chemistry and aerobic performance of coral reef fishes during experiments, 2009, supplement to: Munday, Philip L; Crawley, Natalie E; Nilsson, Göran E (2009): Interacting effects of elevated temperature and ocean acidification on the aerobic performance of coral reef fishes. Marine Ecology Progress Series, 388, 235-242

Philip L Munday, Natalie E Crawley & Göran E Nilsson
Concerns about the impacts of ocean acidification on marine life have mostly focused on how reduced carbonate saturation affects calcifying organisms. Here, we show that levels of CO2-induced acidification that may be attained by 2100 could also have significant effects on marine organisms by reducing their aerobic capacity. The effects of temperature and acidification on oxygen consumption were tested in 2 species of coral reef fishes, Ostorhinchus doederleini and O. cyanosoma, from the Great Barrier...

Seawater carbonate chemistry and Globigerinoides sacculifer biological processes during experiments, 2010, supplement to: Lombard, Fabien; da Rocha, R E; Bijma, Jelle; Gattuso, Jean-Pierre (2010): Effect of carbonate ion concentration and irradiance on calcification in planktonic foraminifera. Biogeosciences, 7(1), 247-255

Fabien Lombard, R E da Rocha, Jelle Bijma & Jean-Pierre Gattuso
The effect of carbonate ion concentration ([CO3]) on calcification rates estimated from shell size and weight was investigated in the planktonic foraminifera Orbulina universa and Globigerinoides sacculifer. Experiments on G. sacculifer were conducted under two irradiance levels (35 and 335 µmol photons m-2 s-1). Calcification was ca. 30% lower under low light than under high light, irrespective of the [CO3]. Both O. universa and G. sacculifer exhibited reduced final shell weight and calcification rate under...

Seawater carbonate chemistry and biological processes during experiments with Limacina helicina, 2009

Steeve Comeau, Ross Jeffree, Jean-Louis Teyssié & Jean-Pierre Gattuso
Thecosome pteropods (pelagic mollusks) can play a key role in the food web of various marine ecosystems. They are a food source for zooplankton or higher predators such as fishes, whales and birds that is particularly important in high latitude areas. Since they harbor a highly soluble aragonitic shell, they could be very sensitive to ocean acidification driven by the increase of anthropogenic CO2 emissions. The effect of changes in the seawater chemistry was investigated...

Seawater carbonate chemistry and biological processes during experiments with common cuttlefish Sepia officinalis, 2010

Magdalena A Gutowska, Hans-Otto Pörtner & Frank Melzner
Ocean acidification and associated changes in seawater carbonate chemistry negatively influence calcification processes and depress metabolism in many calcifying marine invertebrates. We present data on the cephalopod mollusc Sepia officinalis, an invertebrate that is capable of not only maintaining calcification, but also growth rates and metabolism when exposed to elevated partial pressures of carbon dioxide (pCO2). During a 6 wk period, juvenile S. officinalis maintained calcification under ~4000 and ~6000 ppm CO2, and grew at...

Carbonate system data on the Molokai reef flat, supplement to: Yates, Kimberly Kaye; Halley, Roberet B (2006): CO3**2- concentration and pCO2 thresholds for calcification and dissolution on the Molokai reef flat, Hawaii. Biogeosciences, 3, 357-369

Kimberly Kaye Yates & Roberet B Halley
The severity of the impact of elevated atmospheric pCO2 to coral reef ecosystems depends, in part, on how seawater pCO2 affects the balance between calcification and dissolution of carbonate sediments. Presently, there are insufficient published data that relate concentrations of pCO2 and CO3**2- to in situ rates of reef calcification in natural settings to accurately predict the impact of elevated atmospheric pCO2 on calcification and dissolution processes. Rates of net calcification and dissolution, CO3**2- concentrations,...

Seawater carbonate chemistry and biological processes during experiments with barnacle Semibalanus balanoides, 2010, supplement to: Findlay, Helen S; Kendall, Michael A; Spicer, John I; Widdicombe, Stephen (2010): Relative influences of ocean acidification and temperature on intertidal barnacle post-larvae at the northern edge of their geographic distribution. Estuarine, Coastal and Shelf Science, 88(4), 675-682

Helen S Findlay, Michael A Kendall, John I Spicer & Stephen Widdicombe
The Arctic Ocean and its associated ecosystems face numerous challenges over the coming century. Increasing atmospheric CO2 is causing increasing warming and ice melting as well as a concomitant change in ocean chemistry ("ocean acidification"). As temperature increases it is expected that many temperate species will expand their geographic distribution northwards to follow this thermal shift; however with the addition of ocean acidification this transition may not be so straightforward. Here we investigate the potential...

Seawater carbonate chemistry and biological processes during experiments with common cuttlefish Sepia officinalis, 2008, supplement to: Gutowska, Magdalena A; Pörtner, Hans-Otto; Melzner, Frank (2008): Growth and calcification in the cephalopod Sepia officinalis under elevated seawater pCO2. Marine Ecology Progress Series, 373, 303-309

Magdalena A Gutowska, Hans-Otto Pörtner & Frank Melzner
Ocean acidification and associated changes in seawater carbonate chemistry negatively influence calcification processes and depress metabolism in many calcifying marine invertebrates. We present data on the cephalopod mollusc Sepia officinalis, an invertebrate that is capable of not only maintaining calcification, but also growth rates and metabolism when exposed to elevated partial pressures of carbon dioxide (pCO2). During a 6 wk period, juvenile S. officinalis maintained calcification under ~4000 and ~6000 ppm CO2, and grew at...

Seawater carbonate chemistry and biological processes during experiments with clownfish Amphiprion percula, 2009, supplement to: Munday, Philip L; Dixson, Danielle L; Donelson, Jennifer M; Jones, G P; Pratchett, M S; Devitsina, G V; Doving, K B (2009): Ocean acidification impairs olfactory discrimination and homing ability of a marine fish. Proceedings of the National Academy of Sciences of the United States of America, 106(6), 1848-1852

Philip L Munday, Danielle L Dixson, Jennifer M Donelson, G P Jones, M S Pratchett, G V Devitsina & K B Doving
The persistence of most coastal marine species depends on larvae finding suitable adult habitat at the end of an offshore dispersive stage that can last weeks or months. We tested the effects that ocean acidification from elevated levels of atmospheric carbon dioxide (CO2) could have on the ability of larvae to detect olfactory cues from adult habitats. Larval clownfish reared in control seawater (pH 8.15) discriminated between a range of cues that could help them...

Seawater carbonate chemistry and nutrient fluxes during experiments with brittlestar Amphiura filiformis, 2009, supplement to: Wood, Hannah; Widdicombe, Stephen; Spicer, John I (2009): The influence of hypercapnia and the infaunal brittlestar Amphiura filiformis on sediment nutrient flux – will ocean acidification affect nutrient exchange? Biogeosciences, 6(10), 2015-2024

Hannah Wood, Stephen Widdicombe & John I Spicer
Rising levels of atmospheric carbon dioxide and the concomitant increased uptake of this by the oceans is resulting in hypercapnia-related reduction of ocean pH. Research focussed on the direct effects of these physicochemical changes on marine invertebrates has begun to improve our understanding of impacts at the level of individual physiologies. However, CO2-related impairment of organisms' contribution to ecological or ecosystem processes has barely been addressed. The burrowing ophiuroid Amphiura filiformis, which has a physiology...

Seawater carbonate chemistry and biological processes during experiments with spider crab Hyas araneus, 2009, supplement to: Walther, Kathleen; Sartoris, Franz-Josef; Bock, C; Pörtner, Hans-Otto (2009): Impact of anthropogenic ocean acidification on thermal tolerance of the spider crab Hyas araneus. Biogeosciences, 6(10), 2207-2215

Kathleen Walther, Franz-Josef Sartoris, C Bock & Hans-Otto Pörtner
Future scenarios for the oceans project combined developments of CO2 accumulation and global warming and their impact on marine ecosystems. The synergistic impact of both factors was addressed by studying the effect of elevated CO2 concentrations on thermal tolerance of the cold-eurythermal spider crab Hyas araneus from the population around Helgoland. Here ambient temperatures characterize the southernmost distribution limit of this species. Animals were exposed to present day normocapnia (380 ppm CO2), CO2 levels expected...

Seawater carbonate chemistry and trace element accumulation during experiments with common cuttlefish, Sepia officinalis, 2009, supplement to: Lacoue-Labarthe, Thomas; Martin, Sophie; Oberhänsli, F; Teyssié, Jean-Louis; Markich, S; Ross, J; Bustamante, P (2009): Effects of increased pCO2 and temperature on trace element (Ag, Cd and Zn) bioaccumulation in the eggs of the common cuttlefish,Sepia officinalis. Biogeosciences, 6(11), 2561-2673

Thomas Lacoue-Labarthe, Sophie Martin, F Oberhänsli, Jean-Louis Teyssié, S Markich, J Ross & P Bustamante
Cephalopods play a key role in many marine trophic networks and constitute alternative fisheries resources, especially given the ongoing decline in finfish stocks. Along the European coast, the eggs of the cuttlefish Sepia officinalis are characterized by an increasing permeability of the eggshell during development, which leads to selective accumulation of essential and non-essential elements in the embryo. Temperature and pH are two critical factors that affect the metabolism of marine organisms in the coastal...

EPOCA/EUR-OCEANS data compilation on the effects of ocean acidification, 2011, supplement to: Nisumaa, Anne-Marin; Pesant, Stephane; Bellerby, Richard G J; Delille, Bruno; Middelburg, Jack J; Orr, James C; Riebesell, Ulf; Tyrrell, Toby; Wolf-Gladrow, Dieter A; Gattuso, Jean-Pierre (2010): EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification. Earth System Science Data, 2(2), 167-175

Anne-Marin Nisumaa, Jean-Pierre Gattuso, Richard G J Bellerby, Bruno Delille, Richard J Geider, Jack J Middelburg, James C Orr, Ulf Riebesell, Toby Tyrrell & Dieter A Wolf-Gladrow
The uptake of anthropogenic CO2 by the oceans has led to a rise in the oceanic partial pressure of CO2, and to a decrease in pH and carbonate ion concentration. This modification of the marine carbonate system is referred to as ocean acidification. Numerous papers report the effects of ocean acidification on marine organisms and communities but few have provided details concerning full carbonate chemistry and complementary observations. Additionally, carbonate system variables are often reported...

Seawater carbonate chemistry, pigments and biological processes during experiments with coralline alga Corallina sessilis, supplement to: Gao, Kunshan; Zheng, Y (2010): Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta). Global Change Biology, 16(8), 2388-2398

Kunshan Gao & Y Zheng
Previous studies have shown that increasing atmospheric CO2 concentrations affect calcification in some planktonic and macroalgal calcifiers due to the changed carbonate chemistry of seawater. However, little is known regarding how calcifying algae respond to solar UV radiation (UVR, UVA+UVB, 280-400 nm). UVR may act synergistically, antagonistically or independently with ocean acidification (high CO2/low pH of seawater) to affect their calcification processes. We cultured the articulated coralline alga Corallina sessilis Yendo at 380 ppmv (low)...

Seawater carbonate chemistry and biological processes during experiments with calcifiing organisms, 2009, supplement to: Ries, Justin B; Cohen, Anne L; McCorkle, Daniel C (2009): Marine calcifiers exhibit mixed responses to CO2-induced ocean acidification. Geology, 37(12), 1131-1134

Justin B Ries, Anne L Cohen & Daniel C McCorkle
Anthropogenic elevation of atmospheric carbon dioxide (pCO2) is making the oceans more acidic, thereby reducing their degree of saturation with respect to calcium carbonate (CaCO3). There is mounting concern over the impact that future CO2-induced reductions in the CaCO3 saturation state of seawater will have on marine organisms that construct their shells and skeletons from this mineral. Here, we present the results of 60 d laboratory experiments in which we investigated the effects of CO2-induced...

Seawater carbonate chemistry and processes during experiments with benthic foraminifera Ammonia tepida, supplement to: Dissard, Delphine; Nehrke, Gernot; Reichart, Gert-Jan; Bijma, Jelle (2010): Impact of seawater pCO2 on calcification and Mg/Ca and Sr/Ca ratios in benthic foraminifera calcite: results from culturing experiments with Ammonia tepida. Biogeosciences, 7(1), 81-93

Delphine Dissard, Gernot Nehrke, Gert-Jan Reichart & Jelle Bijma
Evidence of increasing concentrations of dissolved carbon dioxide, especially in the surface ocean and its associated impacts on calcifying organisms, is accumulating. Among these organisms, benthic and planktonic foraminifera are responsible for a large amount of the globally precipitated calcium carbonate. Hence, their response to an acidifying ocean may have important consequences for future inorganic carbon cycling. To assess the sensitivity of benthic foraminifera to changing carbon dioxide levels and subsequent alteration in seawater carbonate...

Seawater carbonate chemistry and shell length of Mediterranean pteropod Cavolinia inflexa larvae during experiments, supplement to: Comeau, Steeve; Gorsky, Gabriel; Alliouane, Samir; Gattuso, Jean-Pierre (2010): Larvae of the pteropod Cavolinia inflexa exposed to aragonite undersaturation are viable but shell-less. Marine Biology, 157(10), 2341-2345

Steeve Comeau, Gabriel Gorsky, Samir Alliouane & Jean-Pierre Gattuso
Larvae of the Mediterranean pteropod Cavolinia inflexa were maintained at controlled pHT values of 8.1, 7.82 and 7.51, equivalent respectively to pCO2 levels of 380, 857 and 1713 µatm. At pHT 7.82 larvae exhibited malformations and lower shell growth, compared to the control condition. At pHT 7.51 the larvae did not make shells but were viable and showed a normal development. However, smaller shells or no shells will have both ecological (food web) and biogeochemical...

Impact of ocean acidification and warming on the larval development of the spider crab Hyas araneus from different latitudes (54° vs 79°N), 2010, supplement to: Walther, Kathleen; Anger, Klaus; Pörtner, Hans-Otto (2010): Impact of ocean acidification and warming on the larval development of the spider crab Hyas araneus from different latitudes (54° vs 79°N). Marine Ecology Progress Series, 417, 159-170

Kathleen Walther, Klaus Anger & Hans-Otto Pörtner
The combined impacts of future scenarios of ocean acidification and global warming on the larvae of a cold-eurythermal spider crab, Hyas araneus L., were investigated in one of its southernmost populations (living around Helgoland, southern North Sea, 54°N) and one of the northernmost populations (Svalbard, North Atlantic, 79°N). Larvae were exposed at temperatures of 3, 9 and 15°C to present day normocapnia (380 ppm CO2) and to CO2 conditions expected for the near or medium-term...

Seawater carbonate chemistry and biological processes during experiments with oyster Crassostrea gigas, 2009, supplement to: Havenhand, Jonathan N; Schlegel, Peter (2009): Near-future levels of ocean acidification do not affect sperm motility and fertilization kinetics in the oyster Crassostrea gigas. Biogeosciences, 6(12), 3009-3015

Jonathan N Havenhand & Peter Schlegel
An increasing number of studies are now reporting the effects of ocean acidification on a broad range of marine species, processes and systems. Many of these are investigating the sensitive early life-history stages that several major reviews have highlighted as being potentially most susceptible to ocean acidification. Nonetheless there remain few investigations of the effects of ocean acidification on the very earliest, and critical, process of fertilization, and still fewer that have investigated levels of...

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