Presence of Prochlorococcus in the aphotic waters
... cycling of the global ocean. As a phototroph, Prochlorococcus is thought to be confined to the euphotic zone, with commonly observed maximum depths of ∼ 150–200 m, but here we show for the first time the substantial presence of Prochlorococcus populations in the dark ocean (“deep Prochlorococcus” he ...
... cycling of the global ocean. As a phototroph, Prochlorococcus is thought to be confined to the euphotic zone, with commonly observed maximum depths of ∼ 150–200 m, but here we show for the first time the substantial presence of Prochlorococcus populations in the dark ocean (“deep Prochlorococcus” he ...
University of Groningen Ecology of Estuarine Macrobenthos
... Estuaries, in general, are shallow, open and dynamic systems. The small volume of water per square metre of sediment surface, the presence of intertidal flats and very shallow subtidal areas, and the generally well-fixed nature of the water column are physical conditions that intensify the exchange ...
... Estuaries, in general, are shallow, open and dynamic systems. The small volume of water per square metre of sediment surface, the presence of intertidal flats and very shallow subtidal areas, and the generally well-fixed nature of the water column are physical conditions that intensify the exchange ...
the southern ocean observing system
... difficult for organisms to produce shells and other hard parts made of calcium carbonate. Because of the temperature dependence of the saturation state of calcium carbonate, cold waters in the polar regions will be the first to become under-saturated. There is evidence that such changes are already ...
... difficult for organisms to produce shells and other hard parts made of calcium carbonate. Because of the temperature dependence of the saturation state of calcium carbonate, cold waters in the polar regions will be the first to become under-saturated. There is evidence that such changes are already ...
The Southern Ocean Observing System
... difficult for organisms to produce shells and other hard parts made of calcium carbonate. Because of the temperature dependence of the saturation state of calcium carbonate, cold waters in the polar regions will be the first to become under-saturated. There is evidence that such changes are already ...
... difficult for organisms to produce shells and other hard parts made of calcium carbonate. Because of the temperature dependence of the saturation state of calcium carbonate, cold waters in the polar regions will be the first to become under-saturated. There is evidence that such changes are already ...
Depositional Environment of Cherts of the Sikhote
... 1. Far East Federal University, Vladivostok 690950, Russia 2. Far East Geological Institute, Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia ABSTRACT: The first data of geochemical study of the Benevka Section cherty rocks belonging to the Taukha terrane of the Sikhote- ...
... 1. Far East Federal University, Vladivostok 690950, Russia 2. Far East Geological Institute, Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia ABSTRACT: The first data of geochemical study of the Benevka Section cherty rocks belonging to the Taukha terrane of the Sikhote- ...
Microplastics in the ocean
... Plastics are discarded and enter the ocean as a result of many different land- and sea-based activities, but there are no reliable estimates of the quantities involved, at a regional or global scale. Microplastics are distributed throughout the ocean, occurring on shorelines, in surface waters and s ...
... Plastics are discarded and enter the ocean as a result of many different land- and sea-based activities, but there are no reliable estimates of the quantities involved, at a regional or global scale. Microplastics are distributed throughout the ocean, occurring on shorelines, in surface waters and s ...
Linking continental drift, plate tectonics and the thermal state of the
... consequently modifies the body forces that drive the motion of continental blocks. The principal aspects of the dynamic feedback between mantle convection and continents have been investigated and described, but very few studies propose a quantitative framework that allows comparison with geological ...
... consequently modifies the body forces that drive the motion of continental blocks. The principal aspects of the dynamic feedback between mantle convection and continents have been investigated and described, but very few studies propose a quantitative framework that allows comparison with geological ...
Oceanography 1 Workbook Instructor: Katryn Wiese - FOG
... Community – This class is a community. We all have the same objective: to learn. Learning happens more fully when you have to explain the new things you learn with others, when you discuss the new content with others. To make that happen, be sure to engage with your fellow students and bring with yo ...
... Community – This class is a community. We all have the same objective: to learn. Learning happens more fully when you have to explain the new things you learn with others, when you discuss the new content with others. To make that happen, be sure to engage with your fellow students and bring with yo ...
Nutrient gradients in the western North Atlantic Ocean
... concentration was correlated with temperature was Prochlorococcus, and its abundance was unrelated to the concentrations of nutrients measured at the surface. We combined our transect results with time-series measurements from the BATS site and data from select depth profiles, and contrasted these No ...
... concentration was correlated with temperature was Prochlorococcus, and its abundance was unrelated to the concentrations of nutrients measured at the surface. We combined our transect results with time-series measurements from the BATS site and data from select depth profiles, and contrasted these No ...
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... as it relates to the carbon cycle; 2) Determine the environmental limits of deep life; and 3) Determine the interactions between deep life and carbon cycling. Each of these goals addresses aspects of Quantities, Movements, Origins, and Forms (QMOF): Quantities (concentrations of cells that constitut ...
... as it relates to the carbon cycle; 2) Determine the environmental limits of deep life; and 3) Determine the interactions between deep life and carbon cycling. Each of these goals addresses aspects of Quantities, Movements, Origins, and Forms (QMOF): Quantities (concentrations of cells that constitut ...
Geochemical conditions in continental margin - E
... Assuming steady state conditions, simple budget calculations indicate that release and transformation rates of phosphate associated to iron phases are not directly represented in the detected solid-phase concentration profiles. Based on pore water gradients, release rates of ferrous iron during redu ...
... Assuming steady state conditions, simple budget calculations indicate that release and transformation rates of phosphate associated to iron phases are not directly represented in the detected solid-phase concentration profiles. Based on pore water gradients, release rates of ferrous iron during redu ...
Do fracture zones define continental margin segmentation
... nature of the along-strike transition between these end-member types is poorly known. Similarly, these margins are structurally segmented by rift- and transform-style structures; the latter related to long-lived first- and second-order offsets in the Mid-Atlantic Ridge (MAR) which can be traced to ea ...
... nature of the along-strike transition between these end-member types is poorly known. Similarly, these margins are structurally segmented by rift- and transform-style structures; the latter related to long-lived first- and second-order offsets in the Mid-Atlantic Ridge (MAR) which can be traced to ea ...
New perspectives in benthic deep-sea microbial ecology
... In recent years, a much wider portion of the seafloor has been sampled to investigate deep-sea microbes. The analysis of these samples has revealed that at least 2.9 × 1029 prokaryotes inhabit the first few meters of sediment depth (Kallmeyer et al., 2012) suggesting that half of the microbial cells ...
... In recent years, a much wider portion of the seafloor has been sampled to investigate deep-sea microbes. The analysis of these samples has revealed that at least 2.9 × 1029 prokaryotes inhabit the first few meters of sediment depth (Kallmeyer et al., 2012) suggesting that half of the microbial cells ...
Phosphorus Cycling in the Sargasso Sea: Investigation Using the
... productivity in these regions. We explore the use of oxygen isotopic signature of dissolved phosphate (d18OPO4) to investigate biogeochemical cycling of P in the Sargasso Sea, Atlantic Ocean. Additional techniques for studying P dynamics including 33P-based DIP turnover time estimates and percent of ...
... productivity in these regions. We explore the use of oxygen isotopic signature of dissolved phosphate (d18OPO4) to investigate biogeochemical cycling of P in the Sargasso Sea, Atlantic Ocean. Additional techniques for studying P dynamics including 33P-based DIP turnover time estimates and percent of ...
First Meeting of the joint IOC-ICES Study Group - Archimer
... France on 23–24 March 2010. It focused on the ongoing activity of SGONS and plans for extended international collaborations to establish global comparability of the nutrient data from the world’s ocean. Thirty-two scientists and experts from 11 countries and 2 delegates from IOC attended the meeting ...
... France on 23–24 March 2010. It focused on the ongoing activity of SGONS and plans for extended international collaborations to establish global comparability of the nutrient data from the world’s ocean. Thirty-two scientists and experts from 11 countries and 2 delegates from IOC attended the meeting ...
Ocean Science - International Science Center
... This surface layer is also called the sunlight zone and extends from the surface to 660 feet (200 meters). It is in this zone that most of the visible light exists. http://www.srh.noaa.gov/jetstream/ocean/layers_ocean.htm With the light comes heating from sun. This heating is responsible for wide ch ...
... This surface layer is also called the sunlight zone and extends from the surface to 660 feet (200 meters). It is in this zone that most of the visible light exists. http://www.srh.noaa.gov/jetstream/ocean/layers_ocean.htm With the light comes heating from sun. This heating is responsible for wide ch ...
the International Oceanographic Commission of UNESCO
... organizations like the IOC, and partners such as the World Meteorological Organization, to help bring together the nations of the world to develop that system and operate it effectively. It’s such a powerful concept to have the IOC as a neutral, interested party where the governments can get togethe ...
... organizations like the IOC, and partners such as the World Meteorological Organization, to help bring together the nations of the world to develop that system and operate it effectively. It’s such a powerful concept to have the IOC as a neutral, interested party where the governments can get togethe ...
Hot spot activity and the break-up of Pangea (PDF
... and geological observations. Major hot spots helped to determine the longitudinal position of Pangea and to construct a model of plate motion during the Pangean break-up. The position of the northern part of Pangea was constrained using Iceland and Jan Mayen hot spots. The Iceland hot spot was trace ...
... and geological observations. Major hot spots helped to determine the longitudinal position of Pangea and to construct a model of plate motion during the Pangean break-up. The position of the northern part of Pangea was constrained using Iceland and Jan Mayen hot spots. The Iceland hot spot was trace ...
W. M. White Geochemistry Chapter 9: Stable Isotopes Chapter 9
... (4) The elements exist in more than one oxidation state (C, N, and S), form a wide variety of compounds (O), or are important constituents of naturally occurring solids and fluids. (5) The abundance of the rare isotope is sufficiently high (generally at least tenths of a percent) to facilitate analy ...
... (4) The elements exist in more than one oxidation state (C, N, and S), form a wide variety of compounds (O), or are important constituents of naturally occurring solids and fluids. (5) The abundance of the rare isotope is sufficiently high (generally at least tenths of a percent) to facilitate analy ...
The Intergovernmental Oceanographic Commission of UNESCO
... suggest there is a significant return on this investment across multiple sectors of the global economy. In the United States alone it is estimated that the improved El Niño forecasting supported by information from GOOS could be worth at least USD 100 million a year to the producers of staples such ...
... suggest there is a significant return on this investment across multiple sectors of the global economy. In the United States alone it is estimated that the improved El Niño forecasting supported by information from GOOS could be worth at least USD 100 million a year to the producers of staples such ...
Stable Isotope Methods for the Study of the Nitrogen Cycle
... needs to decide how to interpret the initial time point, as there is often a substantial time between tracer addition and filtration (often 30 min). During this interval, the population may experience abnormal conditions (e.g., high light exposure or rush uptake due to nutrient perturbation) prior t ...
... needs to decide how to interpret the initial time point, as there is often a substantial time between tracer addition and filtration (often 30 min). During this interval, the population may experience abnormal conditions (e.g., high light exposure or rush uptake due to nutrient perturbation) prior t ...
Anoxic event
Oceanic anoxic events or anoxic events (Anoxia conditions) refer to intervals in the Earth's past where portions of oceans become depleted in oxygen (O2) at depths over a large geographic area. During some of these events, euxinia develops - euxinia refers to anoxic waters that contain H2S hydrogen sulfide. Although anoxic events have not happened for millions of years, the geological record shows that they happened many times in the past. Anoxic events coincide with several mass extinctions and may contribute to these events. These mass extinctions include some that geobiologists use as time markers in biostratigraphic dating. It is believed oceanic anoxic events are strongly linked to slowing of ocean circulation, climatic warming and elevated levels of greenhouse gases. Enhanced volcanism (through the release of CO2 and other greenhouse gases) is the proposed central external trigger for the development of these events.