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Showing 1 to 20 of 33 for “"Organic Phosphorus"”.
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Concentration and distribution of organic phosphorus through a grassland catchment transfer continuum
… thesis focuses on the potential mobilization of phosphorus (P), in particular DNA-phosphorus (DNA-P) and phospholipid-phosphorus (PLD-P) from soil in a grassland catchment. DNA-P and PLD-P are among the most labile and biodegradable (and hence interesting) of organic phosphorus compounds. This …
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Organic Phosphorus Dynamics and Contributions to Eutrophication in a Shallow, Freshwater Bay
Phosphorus (P) is essential for aquatic life; cycling between both inorganic and organic forms to maintain an ecological balance. Its addition into P-scarce freshwaters, either through terrestrial (external) or sedimentary (internal) loading, may disrupt this balance causing blooms of phytoplankton …
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Resource partitioning of soil organic phosphorus: investigations from a tropical mountain forest
… phenomena occurs in the tropics with soil phosphorus (P). I grew seedlings of arbuscular mycorrhizal (AM) Mollinedia darensi and Podocarpus olieofolius, ectomycorrhizal (EM) Oreomunnia mexicana, and nonmycorrhizal (NM) Roupala montana tree species in a hydroponic growth medium containing …
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Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation
Phosphorus, an essential nutrient, is removed from the oceans only through burial with marine sediments. Organic phosphorus (Porg) constitutes an important fraction (ca. 25%) of total-P in marine sediments. However, given the inherent lability of primary Porg biochemicals, it is a puzzle that any …
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Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation
Phosphorus, an essential nutrient, is removed from the oceans only through burial with marine sediments. Organic phosphorus (Prog) constitutes an important fraction (ca. 25%) of total-P in marine sediments. However, given the inherent lability of primary Prog biochemicals, it is a puzzle that any …
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Geomycology: fungal bioweathering, bioleaching, bioprecipitation and biotransformation of metals and minerals
… of uranium and lead when utilising an organic phosphorus-containing substrate as the sole phosphorus source. The results obtained revealed that test fungal species showed bioweathering effects on zinc sulfide ore, and clear evidence of biotransformation and bioleaching of zinc sulfide …
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Interactions Between Land Use and Local Lithology on Phosphorus Distribution in Northrup Creek Sediments, Monroe County, New York
Phosphorus, a key nutrient in many aquatic systems that limits the growth of algae, plays a key role in the occurrence of eutrophication and toxic algal blooms. Past research has shown that land use and lithology are major contributors of phosphorus in a creek. High levels of organic phosphorus …
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Relating the biogeochemistries of zinc, cobalt, and phosphorus to phytoplankton activities in the sea
… explores the potential of zinc, cobalt, and phosphorus to influence primary production in the subarctic North Pacific, the Bering Sea, and the North Atlantic Ocean, In the North Pacific and Bering Sea, total zinc concentrations were measured along a near-surface transect and in selected deep …
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Relating the biogeochemistries of zinc, cobalt, and phosphorus to phytoplankton activities in the sea
… explores the potential of zinc, cobalt, and phosphorus to influence primary production in the subarctic North Pacific, the Bering Sea, and the North Atlantic Ocean. In the North Pacific and Bering Sea, total zinc concentrations were measured along a near-surface transect and in selected deep …
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Heterologous Expression of Arabidopsis Thaliana Purple Acid Phosphatase Gene (Atpap15) in Crops for Phytoremediation of Sites Contaminated with Excess Phosphorus
… pH with maximal activity at pH 4.5. AtPAP15 is a phosphorus starvation inducible (PSI) gene that is expressed highly during phosphorus deficient conditions. In the current study, AtPAP15 was overexpressed in Nicotiana tabaccum under cauliflower mosaic virus (CaMV35S) constitutive promoter. After …
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Effects of phytic acid sorption on iron polymerization and at the ferrihydrite-water interface
Phytic acid is the most predominant organic phosphorus species in soils. Its stability in soils is mainly due to its high affinity for soil colloids, especially Fe (oxyhydr)oxides. They have been acknowledged as mobile/reactive adsorbents for P in soil-water environments. Although several sorption …
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Phosphorus physiology of the marine cyanobacterium Trichodesmium
… These regions are often characterized by low phosphorus (P) concentrations, and P deficiency of Trichodesmium could limit growth, and constrain nitrogen fixation by this genus. Three key components of P metabolism in cyanobacteria include: inorganic phosphate (Pi) uptake, dissolved organic …
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Microbiological influences on phosphorus release from aerobic lake sediments
… Classical theories concerning the regulation of phosphorus release from sediments by oxidation-reduction potential neglect the potential of microorganisms to transfer large amounts of phosphorus out of sediments. Aerobic surface sediments collected from the eutrophic Occoquan Reservoir, Virginia, …
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Phosphorus biogeochemistry and models in estuaries: case study of the Southampton Water system
Various factors may increase the supply of organic matter content (eutrophication status) of estuarine and coastal systems. The most common cause of eutrophication is considered to be nutrient enrichment. In this study data has been collected in monthly surveys from January 1998 to April 1999 in …
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Decomposition and Production of Dissolved Organic Matter by Aquatic Bacteria
Aquatic ecosystems transport large amounts of organic matter from the landscape to the oceans. Along this pathway, heterotrophic bacteria rapidly cycle these compounds by acting as both degraders and producers of organic compounds. Understanding the ultimate fate of the organic matter and …
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