Urea decomposition by bacteria in the Southern California Bight and
... the decomposition rates w e measured were representative of the substantial ambient pools of urease-sensitive urea present in the water. If significant pools of condensed urea were also present, then w e have actually underestimated the true rates. Our finding of the significance of bacterial hydrol ...
... the decomposition rates w e measured were representative of the substantial ambient pools of urease-sensitive urea present in the water. If significant pools of condensed urea were also present, then w e have actually underestimated the true rates. Our finding of the significance of bacterial hydrol ...
Enrichment of silicate and CO2 and circulation of the bottom water in
... these maxima are maintained or even enhanced due to the decomposition of sinking organic material. As the remineralization rates vary for different compounds, the vertical distribution of these compounds will also be dissimilar. Especially, for silicate the processes related to its biological cyclin ...
... these maxima are maintained or even enhanced due to the decomposition of sinking organic material. As the remineralization rates vary for different compounds, the vertical distribution of these compounds will also be dissimilar. Especially, for silicate the processes related to its biological cyclin ...
marine debris occurrence and treatment: a review
... are collected. The other end of the barrier is connected to a large float which is tied with a string ...
... are collected. The other end of the barrier is connected to a large float which is tied with a string ...
41 - Association for the Sciences of Limnology and Oceanography
... the solvents, it was necessary to purge the samples in order to avoid a large trough in the chromatograms. Prior to injection, salts were removed from the samples by ion exchange using a mixed anion and cation resin, which was prepared from AG 2-X8 anion exchange resin (20-50 mesh) and AG 5OW-X8 cat ...
... the solvents, it was necessary to purge the samples in order to avoid a large trough in the chromatograms. Prior to injection, salts were removed from the samples by ion exchange using a mixed anion and cation resin, which was prepared from AG 2-X8 anion exchange resin (20-50 mesh) and AG 5OW-X8 cat ...
Spreading of Greenland meltwaters in the ocean revealed by noble
... heating [Chu, 2014]. This Surface Melt Runoff (SMR) flows out from under the base of marine-terminating glaciers mixing with the other types. The most commonly used tracers are temperature and salinity, which, including mass conservation, provide only three constraints for five unknowns—leaving the wat ...
... heating [Chu, 2014]. This Surface Melt Runoff (SMR) flows out from under the base of marine-terminating glaciers mixing with the other types. The most commonly used tracers are temperature and salinity, which, including mass conservation, provide only three constraints for five unknowns—leaving the wat ...
THE SEABIRD COMMUNITY OF THE PERU CURRENT, 1980
... noted previously in these waters. Data were gathered on 14 cruises occurring in both the autumn/winter and spring/summer. The avifauna is described in terms of endemic, resident and migrant species, including those originating (breeding) from both the southern and northern hemispheres. We also delin ...
... noted previously in these waters. Data were gathered on 14 cruises occurring in both the autumn/winter and spring/summer. The avifauna is described in terms of endemic, resident and migrant species, including those originating (breeding) from both the southern and northern hemispheres. We also delin ...
Public Comments on the U.S. Commission on Ocean Policy’s Preliminary Report
... The Association of National Estuary Programs (ANEP) is a not-for-profit organization whose purpose is to promote a common vision for the preservation and responsible stewardship of our nation’s estuaries and bays. Our Board of Directors represents citizens, representatives of state and local governm ...
... The Association of National Estuary Programs (ANEP) is a not-for-profit organization whose purpose is to promote a common vision for the preservation and responsible stewardship of our nation’s estuaries and bays. Our Board of Directors represents citizens, representatives of state and local governm ...
Marine Geology: Exploring the New Frontiers of the Ocean (The
... Erickson presents a fascinating history of ocean exploration. He shows how early explorations were slowly able to reveal data about ocean currents and routes to distant lands and how some dredging operations uncovered huge deposits of metals on the seafloor.Tremendous leaps in our understanding of t ...
... Erickson presents a fascinating history of ocean exploration. He shows how early explorations were slowly able to reveal data about ocean currents and routes to distant lands and how some dredging operations uncovered huge deposits of metals on the seafloor.Tremendous leaps in our understanding of t ...
Microbial Extracellular Enzymes in Marine Sediments: Methods
... The deep biosphere is defined as the subsurface ecosystem in which little energy is available to microorganisms and microorganisms can live for thousands of years. Heterotrophic microbes survive in the deep biosphere even though organic matter is limited and highly recalcitrant in nature. Measuring ...
... The deep biosphere is defined as the subsurface ecosystem in which little energy is available to microorganisms and microorganisms can live for thousands of years. Heterotrophic microbes survive in the deep biosphere even though organic matter is limited and highly recalcitrant in nature. Measuring ...
pdf
... Earth. In this context, the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC, 2007) concluded that changes in global climate over the past 50 years were very likely caused by anthropogenic greenhouse gas emissions and not to known natural causes alo ...
... Earth. In this context, the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC, 2007) concluded that changes in global climate over the past 50 years were very likely caused by anthropogenic greenhouse gas emissions and not to known natural causes alo ...
Climate Change Impacts and Vulnerabilities in Canada`s Pacific
... Changes in climate and oceanography .............................................................................................30 3.1 Temperature..............................................................................................................................................32 3.2 Prec ...
... Changes in climate and oceanography .............................................................................................30 3.1 Temperature..............................................................................................................................................32 3.2 Prec ...
Abundance and ecological implications of microplastic
... Figure 2.9. Numerical abundance and percent cross-sectional area of plastic debris by size and water mass .............................................................................................. 78 Figure 2.10. Circularity vs. feret diameter in microplastic particles ......................... ...
... Figure 2.9. Numerical abundance and percent cross-sectional area of plastic debris by size and water mass .............................................................................................. 78 Figure 2.10. Circularity vs. feret diameter in microplastic particles ......................... ...
The annual cycle of surface CO2 and O2 in the Ross Sea
... TCO2 values of ~2075 mol kg-1 which are ~150 mol kg-1 below the pre- phytoplankton bloom values of 2233 mol kg-1 (Figure 3b). By the time winter sea ice concentration have reached a winter average of 80%, the pCO2 and TCO2 concentrations appear to be returning to winter values. Measurements in la ...
... TCO2 values of ~2075 mol kg-1 which are ~150 mol kg-1 below the pre- phytoplankton bloom values of 2233 mol kg-1 (Figure 3b). By the time winter sea ice concentration have reached a winter average of 80%, the pCO2 and TCO2 concentrations appear to be returning to winter values. Measurements in la ...
Rare earth elements and neodymium isotopes in sedimentary
... sediments collected from various depositional environments, i.e. rivers (n=25), estuaries (n=18), openocean settings (n=15), and cold seeps (n=12). Sedimentary Organic Matter (SOM) was extracted using a mixed hydrogen peroxide/nitric acid solution (20%-H2O2 – 0.02M-HNO3), after removal of carbonate ...
... sediments collected from various depositional environments, i.e. rivers (n=25), estuaries (n=18), openocean settings (n=15), and cold seeps (n=12). Sedimentary Organic Matter (SOM) was extracted using a mixed hydrogen peroxide/nitric acid solution (20%-H2O2 – 0.02M-HNO3), after removal of carbonate ...
Sea-Floor Massive Sulphides 1A - SPC
... Hydrothermal vents were first discovered at the Galapagos Rift in 1977 (Corliss et al 1979). Observations made in 1979 from the manned submersible Alvin on the East Pacific Rise revealed vents where superheated water was emerging from the sea floor at temperatures exceeding 350°C. These vents were a ...
... Hydrothermal vents were first discovered at the Galapagos Rift in 1977 (Corliss et al 1979). Observations made in 1979 from the manned submersible Alvin on the East Pacific Rise revealed vents where superheated water was emerging from the sea floor at temperatures exceeding 350°C. These vents were a ...
Status of US Harmful Algal Blooms
... green, red, or brown, and shade bottom plants and animals. ...
... green, red, or brown, and shade bottom plants and animals. ...
requirements for an ecosystem approach to fisheries management
... A healthy marine ecosystem is a prerequisite for realising the full potential of the oceans and seas in terms of income and jobs. Maintaining a healthy marine ecosystem is about maintaining the size and diversity of life within it, including fish stocks. Human activities that impact marine ecosystem ...
... A healthy marine ecosystem is a prerequisite for realising the full potential of the oceans and seas in terms of income and jobs. Maintaining a healthy marine ecosystem is about maintaining the size and diversity of life within it, including fish stocks. Human activities that impact marine ecosystem ...
The South Atlantic Anticyclone as a key player for the representation
... vertical resolution, regional climate models imply a sharper focus on selected domain location (Sein et al. 2015). The freedom of choice regarding the domain allows not only simulating the coupled interactions between components of the climate system, but also to either include or exclude some of th ...
... vertical resolution, regional climate models imply a sharper focus on selected domain location (Sein et al. 2015). The freedom of choice regarding the domain allows not only simulating the coupled interactions between components of the climate system, but also to either include or exclude some of th ...
REGIONAL WORKSHOP ON MARINE SPATIAL PLANNING (MSP
... rated Management of Estuarine, Coastal and Marine Environments in Canada provide the policy framework and guide Canada’s approach to oceans management. As mentioned above, the approach is centered on the principle of Integrated Management (IM), which seeks to establish decision-making structures tha ...
... rated Management of Estuarine, Coastal and Marine Environments in Canada provide the policy framework and guide Canada’s approach to oceans management. As mentioned above, the approach is centered on the principle of Integrated Management (IM), which seeks to establish decision-making structures tha ...
It is believed that the hearth stones were originally used to line
... for authigenic uranium uptake is incorporated into the dose rate model. Authigenic uranium uptake ...
... for authigenic uranium uptake is incorporated into the dose rate model. Authigenic uranium uptake ...
Marine Algal Toxins: Origins, Health Effects, and
... marine mammals, birds, and other animals dependent on the marine food web. The impacts of algal toxins are generally observed as acute intoxications, whereas the environmental health effects of chronic exposure to low levels of algal toxins are only poorly documented and are an emerging issue (2-5). ...
... marine mammals, birds, and other animals dependent on the marine food web. The impacts of algal toxins are generally observed as acute intoxications, whereas the environmental health effects of chronic exposure to low levels of algal toxins are only poorly documented and are an emerging issue (2-5). ...
wgfast12
... meso and submeso scales is increasingly suspected to play a fundamental role in the functioning of marine ecosystems. The method allows for the resolution of a large range of meso and submesoscale structures such as eddies, filaments and internal waves. This information is used to estimate the habit ...
... meso and submeso scales is increasingly suspected to play a fundamental role in the functioning of marine ecosystems. The method allows for the resolution of a large range of meso and submesoscale structures such as eddies, filaments and internal waves. This information is used to estimate the habit ...
Organic carbon and humic acids in sediments of the
... done on humic substances in the Arabian Sea, which is 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 weste ...
... done on humic substances in the Arabian Sea, which is 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 weste ...
NGF GEOHAB 2009 Abstracts and Proceedings of the Geological Society of Norway
... providing a truly multidisciplinary and exciting forum for exchange of knowledge and ideas. As shown by the quality of the abstracts, it is obvious that the conference will give a global state-of-the-art perspective on habitat mapping. It is our intention that this GeoHab conference combines high qu ...
... providing a truly multidisciplinary and exciting forum for exchange of knowledge and ideas. As shown by the quality of the abstracts, it is obvious that the conference will give a global state-of-the-art perspective on habitat mapping. It is our intention that this GeoHab conference combines high qu ...
Ecosystem Goods and Services of the Deep Sea
... 1. Introduction The deep sea, defined as water and sea floor areas below 200 meters, comprises 90% of the biosphere, but until recently humans knew relatively little about it. Since little or no light penetrates to these depths, it had been assumed that deep-sea life was sparse. But in fact life is ...
... 1. Introduction The deep sea, defined as water and sea floor areas below 200 meters, comprises 90% of the biosphere, but until recently humans knew relatively little about it. Since little or no light penetrates to these depths, it had been assumed that deep-sea life was sparse. But in fact life is ...
Ecosystem of the North Pacific Subtropical Gyre
The North Pacific Subtropical Gyre (NPSG) is the largest contiguous ecosystem on earth. In oceanography, a subtropical gyre is a ring-like system of ocean currents rotating clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere caused by the Coriolis Effect. They generally form in large open ocean areas that lie between land masses.The NPSG is the largest of the gyres as well as the largest ecosystem on our planet. Like other subtropical gyres, it has a high-pressure zone in its center. Circulation around the center is clockwise around this high-pressure zone. Subtropical gyres make up 40% of the Earth’s surface and play critical roles in carbon fixation and nutrient cycling. This particular gyre covers most of the Pacific Ocean and comprises four prevailing ocean currents: the North Pacific Current to the north, the California Current to the east, the North Equatorial Current to the south, and the Kuroshio Current to the west. Its large size and distance from shore has caused the NPSG to be poorly sampled and thus poorly understood.The life processes in open-ocean ecosystems are a sink for the atmosphere’s increasing CO2. Gyres make up a large proportion, approximately 75%, of what we refer to as the open ocean, or the area of the ocean that does not consist of coastal areas. They are considered oligotrophic, or nutrient poor because they are far from terrestrial runoff. These regions were once thought to be homogenous and static habitats. However, there is increasing evidence that the NPSG exhibits substantial physical, chemical, and biological variability on a variety of time scales. Specifically, the NPSG exhibits seasonal and interannual variations in primary productivity (simply defined as the production of new plant material), which is important for the uptake of CO2.The NPSG is not only a sink for CO2 in the atmosphere, but also other pollutants. As a direct result of this circular pattern, gyres act like giant whirlpools and become traps for anthropogenic pollutants, such as marine debris. The NPSG has become recognized for the large quantity of plastic debris floating just below the surface in the center of the gyre. This area has recently received a lot of media attention and is commonly referred to as the Great Pacific Garbage Patch.