搜索结果: 1-15 共查到“海洋科学 phosphorus”相关记录99条 . 查询时间(2.524 秒)
Less life:Limited phosphorus recycling suppressed early Earth’s biosphere
Less life Limited phosphorus recycling early Earth’s biosphere
2017/12/18
As Earth’s oxygen levels rose to near-modern levels over the last 800 million years, phosphorus levels also increased, according to modeling led by the UW’s Michael Kipp and others. Accordingly, Kipp ...
Phosphorus in Our Waters
Waters Phosphorus
2015/7/22
Familiarize students with the problem of nutrient loading and eutrophication.
Encourage students to consider their own roles in human-ecosystem interactions and also consider the ways that they could...
Phosphorus (P) is fundamental to life, and years of study in marine systems have built a broad understanding of the marine P cycle. Various aspects of marine P biogeochemistry have been reviewed previ...
Revealing the Ocean's Hidden Fertilizer Marine Plants Play Major Role in Phosphorus Cycling
Ocean's Hidden Fertilizer Marine Plants Phosphorus Cycling
2015/5/25
Phosphorus is one of the most common substances on Earth. An essential nutrient for every living organism—humans require approximately 700 milligrams per day—we are rarely concerned about consuming en...
Stoichiometric imbalance in rates of nitrogen and phosphorus retention, storage, and recycling can perpetuate nitrogen deficiency in highly-productive reservoirs
nitrogen phosphorus retention storage
2014/11/28
We measured the nutrient stoichiometry of inputs, outputs, retention, storage, and recycling in three seasonally
nitrogen (N)-deficient reservoirs by incorporating watershed mass balances with measur...
Enrichment of particulate phosphorus in a sea-surface microlayer over the Eastern Equatorial Pacific Ocean
sea-surface microlayer biogeochemical enrichment particulate phosphorus high-nutrient low-chlorophyll ocean
2017/4/11
The significant enrichment of chemical composition associated with enhanced bioactivities and an increased number
of bio-particles in the sea-surface microlayer (SML) were observed in the high-nutrie...
Arsenic and phosphorus biogeochemistry in the ocean: Arsenic species as proxies for P-limitation
Arsenic and phosphorus biogeochemistry the ocean: Arsenic species proxies for P-limitation
2014/4/2
Arsenic and phosphorus are biochemically very similar, and hence arsenate (As5+) is toxic by interfering with the energy metabolism, in particular during P limitation. However, many phytoplankton deto...
Phosphorus enrichment and carbon depletion contribute to high Microcystis biomass and microcystin concentrations in Ugandan lakes
Phosphorus enrichment carbon depletion contribute
2014/4/2
We investigated the factors influencing cyanobacterial biomass and microcystin (MC) concentrations in several
Ugandan lakes from September 2008 to February 2009. We characterized thermal structure, l...
Iron, phosphorus, and nitrogen supply ratios define the biogeography of nitrogen fixation
Iron phosphorus nitrogen fixation
2014/4/2
We present a unified conceptual framework describing the competition between diazotrophs and non–
nitrogen-fixing marine plankton and their interaction with three essential nutrient elements: nitroge...
Phosphorus loading of mountain lakes: Terrestrial export and atmospheric deposition
Phosphorus loading mountain lakes Terrestrial export atmospheric deposition
2014/4/8
We studied the atmospheric deposition of phosphorus (P) forms along an elevation gradient, and its contribution to the total external P loading of lakes in the Tatra Mountains and the Bohemian Forest,...
Characterization of alkaline phosphatase activity in the North and South Pacific Subtropical Gyres: Implications for phosphorus cycling
alkaline phosphatase activity iin the North South Pacific Subtropical Gyres:phosphorus cycling
2014/4/8
We characterized alkaline phosphatase (AP) activity (APA) and report AP kinetic parameters in the North and South Pacific Subtropical Gyres (NPSG and SPSG, respectively) to evaluate the relative impor...
Sedimentary phosphorus dynamics and the evolution of bottom-water hypoxia: A coupled benthic–pelagic model of a coastal system
Sedimentary phosphorus dynamics a coastal system
2014/4/8
The present study examines oxygen and phosphorus dynamics at a seasonally hypoxic site in the Arkona basin
of the Baltic Sea. A coupled benthic–pelagic reactive-transport model is used to describe th...
Lake trophic status can be determined by the depth distribution of sediment phosphorus
Lake trophic status sediment phosphorus
2014/4/4
In this meta-analysis, we examine how sediment phosphorus (P) burial pattern may be related to trophic state.
We present sediment P profiles from 94 lakes that demonstrate fundamental differences in ...
Production of organic matter by Trichodesmium IMS101 as a function of phosphorus source
Production of organic matter by Trichodesmium IMS101 as a function of phosphorus source
2014/4/17
Herein we present the results of a series of laboratory experiments conducted to delineate the relationship between dissolved organic phosphorus (DOP) utilization and organic matter production by the ...
Roles of phosphorus and ultraviolet radiation in the strength of phytoplankton–zooplankton coupling in a Mediterranean high mountain lake
Roles of phosphorus ultraviolet radiation
2014/4/17
Ultraviolet solar radiation (UVR) and atmospheric nutrient inputs associated with aerosols are major
worldwide stressors that simultaneously affect species and the interaction among them. A 2 3 5 fie...