Phosphorus Cycling in the Sargasso Sea: Investigation Using the
... turnover time estimates and percent of cells expressing alkaline phosphatase (AP) activity as measured by enzyme-labeling fluorescence are also used. In surface waters, d18OPO4 values were lower than equilibrium by 3–6%, indicative of dissolved organic phosphorous (DOP) remineralization by extracellu ...
... turnover time estimates and percent of cells expressing alkaline phosphatase (AP) activity as measured by enzyme-labeling fluorescence are also used. In surface waters, d18OPO4 values were lower than equilibrium by 3–6%, indicative of dissolved organic phosphorous (DOP) remineralization by extracellu ...
Get PDF - Wiley Online Library
... Thousands of scleractinian corals were collected from the New England Seamounts by deep submergence vehicle Alvin and remotely operated vehicle Hercules during a series of cruises between 2003 and 2005 [Robinson et al., 2007; Thiagarajan et al., 2013]. Colonial corals (Solenosmilia, Lophelia, and En ...
... Thousands of scleractinian corals were collected from the New England Seamounts by deep submergence vehicle Alvin and remotely operated vehicle Hercules during a series of cruises between 2003 and 2005 [Robinson et al., 2007; Thiagarajan et al., 2013]. Colonial corals (Solenosmilia, Lophelia, and En ...
The comparative estimation of phytoplanktonic, microphytobenthic
... and processes pertaining to all the categories of producers in marine and freshwaters (Hall and Moll, 1975) and several reviews devoted more specifically to one or another group of algae (see the relevant section below). As for comparative assessments of benthic vs. planktonic production, only rough ...
... and processes pertaining to all the categories of producers in marine and freshwaters (Hall and Moll, 1975) and several reviews devoted more specifically to one or another group of algae (see the relevant section below). As for comparative assessments of benthic vs. planktonic production, only rough ...
New perspectives in benthic deep-sea microbial ecology
... in deep-sea surface sediments the abundance of archaea can be more relevant than previously thought (ca. 107 –108 per gram of sediment dry weigh), contributing in some cases, up to more than 50% of the entire prokaryotic assemblage (Giovannelli et al., 2013; Molari et al., 2013). In quantitative ter ...
... in deep-sea surface sediments the abundance of archaea can be more relevant than previously thought (ca. 107 –108 per gram of sediment dry weigh), contributing in some cases, up to more than 50% of the entire prokaryotic assemblage (Giovannelli et al., 2013; Molari et al., 2013). In quantitative ter ...
Mantle plumes, plumes and “plumes”: do we
... compared with depleted mid-oceanic ridge basalts, hence source is primitive in composition (Earth’s lower mantle); 5. Hot spots lie atop of localized thermal upwellings referred to as plumes; 6. Plumes represent the major part of upraising convective flow; 7. Plumes give the force for plate tectonic ...
... compared with depleted mid-oceanic ridge basalts, hence source is primitive in composition (Earth’s lower mantle); 5. Hot spots lie atop of localized thermal upwellings referred to as plumes; 6. Plumes represent the major part of upraising convective flow; 7. Plumes give the force for plate tectonic ...
Sites of significance for indigenous marine biodiversity in the
... information that describe features of the marine ecosystem in the Wellington region. The territorial seas within the Wellington region encompass a very wide range of marine habitats, from sheltered harbours to the deep waters and canyons of Cook Strait. Consequently, the task of collating and review ...
... information that describe features of the marine ecosystem in the Wellington region. The territorial seas within the Wellington region encompass a very wide range of marine habitats, from sheltered harbours to the deep waters and canyons of Cook Strait. Consequently, the task of collating and review ...
Cenozoic mass extinctions in the deep sea
... assemblage and its position within the sediments was discussed by Jorissen et al. (1995) in the “TROX-model,” and modified and refined by various authors (Jorissen et al., 1998; Jorissen, 1999; Fontanier et al., 2002; and Gooday, 2003). In this model, microhabitat occupancy (the places where foramin ...
... assemblage and its position within the sediments was discussed by Jorissen et al. (1995) in the “TROX-model,” and modified and refined by various authors (Jorissen et al., 1998; Jorissen, 1999; Fontanier et al., 2002; and Gooday, 2003). In this model, microhabitat occupancy (the places where foramin ...
Contributions of anoxygenic and oxygenic phototrophy and
... about metabolic pathways when the genes involved are components of more than one pathway. The CCMs are one sort of carbon pump; ecologically, there is an ecosystem-scale biological carbon pump resulting from sedimentation of particulate organic carbon from oxygenic primary production down the water ...
... about metabolic pathways when the genes involved are components of more than one pathway. The CCMs are one sort of carbon pump; ecologically, there is an ecosystem-scale biological carbon pump resulting from sedimentation of particulate organic carbon from oxygenic primary production down the water ...
Contributions of anoxygenic and oxygenic phototrophy and
... about metabolic pathways when the genes involved are components of more than one pathway. The CCMs are one sort of carbon pump; ecologically, there is an ecosystem-scale biological carbon pump resulting from sedimentation of particulate organic carbon from oxygenic primary production down the water ...
... about metabolic pathways when the genes involved are components of more than one pathway. The CCMs are one sort of carbon pump; ecologically, there is an ecosystem-scale biological carbon pump resulting from sedimentation of particulate organic carbon from oxygenic primary production down the water ...
Scotian Shelf in Context
... Fundy and Gulf of Maine with the rest of the Northwest Atlantic. Strong tidal currents carried through the channel helped shape its seafloor. Surficial geology The sediments covering the Scotian Shelf seafloor are an important structural and functional component of the marine ecosystem. Areas with a ...
... Fundy and Gulf of Maine with the rest of the Northwest Atlantic. Strong tidal currents carried through the channel helped shape its seafloor. Surficial geology The sediments covering the Scotian Shelf seafloor are an important structural and functional component of the marine ecosystem. Areas with a ...
I. Introduction
... the upper 200 metres of the water (e.g., Longhurst provinces, or the GOODS report and follow-on work by Spalding and co-authors). Data on the deep pelagic zones have been so sparse that these areas have generally not been included in monitoring and management schemes or in conservation planning. How ...
... the upper 200 metres of the water (e.g., Longhurst provinces, or the GOODS report and follow-on work by Spalding and co-authors). Data on the deep pelagic zones have been so sparse that these areas have generally not been included in monitoring and management schemes or in conservation planning. How ...
Western Pacific Air-Sea Interaction Study © by TERRAPUB 2014.
... were 16 and 18 mg m–3 at the end. Bacterial abundance showed a decrease at first, reached minimum at the day 4 (40.4 ¥ 106 and 0.5 ¥ 106 cells ml–1) and then increased during the latter half of the experiment. DMS concentration quickly increased at day 2, maintained a high concentration for several ...
... were 16 and 18 mg m–3 at the end. Bacterial abundance showed a decrease at first, reached minimum at the day 4 (40.4 ¥ 106 and 0.5 ¥ 106 cells ml–1) and then increased during the latter half of the experiment. DMS concentration quickly increased at day 2, maintained a high concentration for several ...
Rare earth elements and neodymium isotopes in sedimentary
... Lee et al., 2004, Meyers and Ishiwatari, 1993 and Wakeham and Lee, 1989). The organic compounds present in natural waters are generally derived from photosynthetic processes, with the exception of deep-sea extreme environments, such as submarine hydrothermal systems and methane seeps, where organic ...
... Lee et al., 2004, Meyers and Ishiwatari, 1993 and Wakeham and Lee, 1989). The organic compounds present in natural waters are generally derived from photosynthetic processes, with the exception of deep-sea extreme environments, such as submarine hydrothermal systems and methane seeps, where organic ...
Distribution of barium in the Weddell Gyre: Impact of circulation and
... The most conspicuous feature in the Bad distribution is the difference between the upper 500–1000 m and the deep basin (Fig. 3). Concentrations below about 500–1000 m mainly range between 90 and 105 nmol kg− 1, which appears to be the background level of Bad of the deep Weddell–Enderby basin. At the ...
... The most conspicuous feature in the Bad distribution is the difference between the upper 500–1000 m and the deep basin (Fig. 3). Concentrations below about 500–1000 m mainly range between 90 and 105 nmol kg− 1, which appears to be the background level of Bad of the deep Weddell–Enderby basin. At the ...
Ocean Science - International Science Center
... year. It is strongest in the tropics and decreases to non-existent in the polar winter season. ...
... year. It is strongest in the tropics and decreases to non-existent in the polar winter season. ...
Paleoceanographic applications of trace
... analysis of paleomarine systems. Algeo and Maynard (2008) showed that it was possible to assess whether a given paleomarine system had a restricted or unrestricted deep watermass on the basis of covariation or lack thereof among trace metals in sedimentary successions. Strong covariation of trace-me ...
... analysis of paleomarine systems. Algeo and Maynard (2008) showed that it was possible to assess whether a given paleomarine system had a restricted or unrestricted deep watermass on the basis of covariation or lack thereof among trace metals in sedimentary successions. Strong covariation of trace-me ...
Organic carbon and humic acids in sediments of the
... influenced by the monsoon. This event causes seasonal reversais in the surface circulation in the Northern lndian Ocean (Wyrtki, 1971). In the Arabian Sea the result is an upwelling phenomenon of varying intensity ali along the coast of the western continental margin of lndia (Sharma, 1976). Upwelli ...
... influenced by the monsoon. This event causes seasonal reversais in the surface circulation in the Northern lndian Ocean (Wyrtki, 1971). In the Arabian Sea the result is an upwelling phenomenon of varying intensity ali along the coast of the western continental margin of lndia (Sharma, 1976). Upwelli ...
3.1 Sediments and Water Quality
... mineralized deposits carried by rivers and through man-made inputs that often contribute amounts substantially above natural levels. The metals of greatest concern are cadmium, chromium, mercury, lead, selenium, arsenic, and antimony because they bioaccumulate, are toxic to biota at low concentratio ...
... mineralized deposits carried by rivers and through man-made inputs that often contribute amounts substantially above natural levels. The metals of greatest concern are cadmium, chromium, mercury, lead, selenium, arsenic, and antimony because they bioaccumulate, are toxic to biota at low concentratio ...
ohrlls unesco un-doalos - Sustainable Development Knowledge
... many cases emphasised the dire necessity of technology transfer as a priority area to achieve sustainable development. ...
... many cases emphasised the dire necessity of technology transfer as a priority area to achieve sustainable development. ...
Day 13 - Home Page
... • Identify physical, geographical, chemical, and biological aspects of the marine environment • Describe major types of marine ecosystems • Outline historic and current human uses of marine resources • Assess human impacts on marine environments • Review the current state of ocean fisheries and reas ...
... • Identify physical, geographical, chemical, and biological aspects of the marine environment • Describe major types of marine ecosystems • Outline historic and current human uses of marine resources • Assess human impacts on marine environments • Review the current state of ocean fisheries and reas ...
Opportunities for Low-Cost CO2 Mitigation in Electricity, Oil, and
... ocean could benefit marine life. The acidity of seawater is currently increasing and carbonate alkalinity decreasing because of the ongoing passive, air-to-sea diffusion of excess anthropogenic CO2 into the ocean [15,16]. Projecting business-as-usual CO2 emission rates through this century, signific ...
... ocean could benefit marine life. The acidity of seawater is currently increasing and carbonate alkalinity decreasing because of the ongoing passive, air-to-sea diffusion of excess anthropogenic CO2 into the ocean [15,16]. Projecting business-as-usual CO2 emission rates through this century, signific ...
Seasonal variation in marine C:N:P stoichiometry
... markedly during spring and summer, with the lowest concentrations usually detected for DIP (notice the relatively high detection limit for DIP at the Jomfruland station). The spring blooms at both stations showed large inter-annual variability but generally peaked in March, and in some years an autu ...
... markedly during spring and summer, with the lowest concentrations usually detected for DIP (notice the relatively high detection limit for DIP at the Jomfruland station). The spring blooms at both stations showed large inter-annual variability but generally peaked in March, and in some years an autu ...
Icefield-to-Ocean Linkages across the Northern Pacific Coastal
... (m) per year and peaking at over 7 m per year, (figure 2; Daly et al. 2008), arrives primarily in autumn and winter, predominantly as snow at higher elevations (McAfee et al. 2013). As a result, the northern PCTR is densely ice covered, or glacierized (72,320 km2, Pfeffer et al. 2014), with all but ...
... (m) per year and peaking at over 7 m per year, (figure 2; Daly et al. 2008), arrives primarily in autumn and winter, predominantly as snow at higher elevations (McAfee et al. 2013). As a result, the northern PCTR is densely ice covered, or glacierized (72,320 km2, Pfeffer et al. 2014), with all but ...
the monaco ocean acidification action plan
... OCEAN ACIDIFICATION presents a very real threat to all those depending on the sea and its resources around the world in the coming decades. My interest in this issue goes back many years. In 2008 I hosted the Second International Symposium on The Ocean in a High-CO2 World in Monaco. That meeting was ...
... OCEAN ACIDIFICATION presents a very real threat to all those depending on the sea and its resources around the world in the coming decades. My interest in this issue goes back many years. In 2008 I hosted the Second International Symposium on The Ocean in a High-CO2 World in Monaco. That meeting was ...
The Wadden Sea in an international perspective
... The Biologische Anstalt Helgoland, founded in 1892 and since 1998 part of the AWI, has as its main research aim to investigate pelagic ecological processes in pelagic shallow water systems, reaching out into the Wadden Sea. Another important focus lies on studies of organisms and processes of the un ...
... The Biologische Anstalt Helgoland, founded in 1892 and since 1998 part of the AWI, has as its main research aim to investigate pelagic ecological processes in pelagic shallow water systems, reaching out into the Wadden Sea. Another important focus lies on studies of organisms and processes of the un ...
Marine pollution
Marine pollution occurs when harmful, or potentially harmful, effects result from the entry into the ocean of chemicals, particles, industrial, agricultural and residential waste, noise, or the spread of invasive organisms. Most sources of marine pollution are land based. The pollution often comes from nonpoint sources such as agricultural runoff, wind-blown debris and dust. Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients. It is a primary cause of eutrophication of surface waters, in which excess nutrients, usually nitrogen or phosphorus, stimulate algae growth.Many potentially toxic chemicals adhere to tiny particles which are then taken up by plankton and benthos animals, most of which are either deposit or filter feeders. In this way, the toxins are concentrated upward within ocean food chains. Many particles combine chemically in a manner highly depletive of oxygen, causing estuaries to become anoxic.When pesticides are incorporated into the marine ecosystem, they quickly become absorbed into marine food webs. Once in the food webs, these pesticides can cause mutations, as well as diseases, which can be harmful to humans as well as the entire food web.Toxic metals can also be introduced into marine food webs. These can cause a change to tissue matter, biochemistry, behaviour, reproduction, and suppress growth in marine life. Also, many animal feeds have a high fish meal or fish hydrolysate content. In this way, marine toxins can be transferred to land animals, and appear later in meat and dairy products.