scispace - formally typeset
Search or ask a question
Topic

Phosphorus

About: Phosphorus is a research topic. Over the lifetime, 53120 publications have been published within this topic receiving 939731 citations. The topic is also known as: element 15 & P.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors investigated the effect of temperature and moisture on soil CO2 efflux in a mature Eucalyptus pauciflora forest in unfertilized and phosphorus-fertilised plots.
Abstract: Rates of soil respiration (CO2 efflux) were measured for a year in a mature Eucalyptus pauciflora forest in unfertilized and phosphorus-fertilized plots. Soil CO2 efflux showed a distinct seasonal trend, and average daily rates ranged from 124 to 574 mg CO2 m−2 hr−1. Temperature and moisture are the main variables that cause variation in soil CO2 efflux; hence their effects were investigated over a year so as to then differentiate the treatment effect of phosphorus (P) nutrition.

170 citations

Journal ArticleDOI
01 Feb 2015-Geology
TL;DR: This paper showed that Ca 2+, Mg 2+ and silica in seawater control phosphorus sorption onto iron oxides, influencing the record of seawater phosphorus preserved in banded iron formations (BIFs).
Abstract: As a nutrient required for growth, phosphorus regulates the activity of life in the oceans. Iron oxides sorb phosphorus from seawater, and through the Archean and early Proterozoic Eons, massive quantities of iron oxides precipitated from the oceans, producing a record of seawater chemistry that is preserved as banded iron formations (BIFs) today. Here we show that Ca 2+ , Mg 2+ , and silica in seawater control phosphorus sorption onto iron oxides, influencing the record of seawater phosphorus preserved in BIFs. Using a model for seawater cation chemistry through time, combined with the phosphorus and silica content of BIFs, we estimate that seawater in the Archean and early Proterozoic Eons likely contained 0.04–0.13 µM phosphorus, on average. These phosphorus limiting conditions could have favored primary production through photoferrotrophy at the expense of oxygenic photosynthesis until upwelling waters shifted from phosphorus to iron limiting.

170 citations

Journal ArticleDOI
TL;DR: The results demonstrate conclusively that the offshore waters are now overwhelmingly phosphorus limited, which supports the conclusion that controlling phosphorus remains the only viable option for managing the trophic status of the Great Lakes offshore waters.
Abstract: Based primarily on data collected over the past four decades by Environment Canada, long-term trends of eutrophication-related variables are developed for the offshore waters of the Laurentian Great Lakes. Trends of spring concentration are reported for the major nutrient species: phosphorus [total phosphorus (TP), and soluble reactive phosphorus (SRP)]; nitrogen [total oxidized nitrogen (NO3 + NO2), and ammonia nitrogen (NH3)]; and silica [soluble reactive silica (SiO2)]. Summer trends of surface chlorophyll a and Secchi depth are developed as indicators of lake trophic response. The results show that phosphorus has declined significantly in all the lakes, whereas nitrogen and silica have both increased. Along with documenting the impacts of the 1978 Great Lakes Water Quality Agreement phosphorus controls and the introduction of dreissenids, the results demonstrate conclusively that the offshore waters are now overwhelmingly phosphorus limited, which supports the conclusion that controlling phosphorus remains the only viable option for managing the trophic status of the Great Lakes offshore waters.

170 citations


Network Information
Related Topics (5)
Organic matter
45.5K papers, 1.6M citations
81% related
Copper
122.3K papers, 1.8M citations
78% related
Amino acid
124.9K papers, 4M citations
77% related
Carbon
129.8K papers, 2.7M citations
77% related
Calcium
78.5K papers, 2.2M citations
76% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20232,479
20225,004
20211,546
20201,644
20191,746