Results 101 to 110 of about 408,574 (237)

The status of phosphorus of a calcareous flush at Bakethin Reservoir, Northumberland [PDF]

, 1993
In order to assess the status of phosphorus of a calcareous flush at Bakethin reservoir, Northumberland, chemical analyses of the concentration of phosphorus in the water and the phosphatase activity of cyanobacteria, Nostoc and Rivularia, as well as the
Bresnan, Eileen
core  

Perspectives of High‐Resolution Mass Spectrometry in Soil Science

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Soil biogeochemical research requires specific, sensitive, and accurate methods to identify and quantify organic molecules in order to trace biochemical processes and assess element cycling in complex, heterogenous systems. High‐resolution mass spectrometry (HRMS) has evolved into a transformative tool for unraveling the complex chemical ...
Bruno Glaser, Tobias Bromm, Klaus Kaiser, Arthur Gross, Carsten Simon, Snežana Maletić, Ines Mulder, Oliver J. Lechtenfeld, Sören Thiele‐Bruhn, Ivy Notterpek, Callum Banfield, Michaela A. Dippold   +11 more
wiley   +1 more source

Chemical and biological phosphorus removal in the activated sludge process [PDF]

, 1980
Bibliography: leaves 86-88.This investigation set out to establish in what degree the phosphorus removal characteristics of the Modified Activated Sludge Process could be enhanced by the in-plant addition of iron salts.
Rabinowitz, Barry
core   +1 more source

Managing and visualising geochemical data for tephra correlation with the IntChron Integration Tool

Journal of Quaternary Science, EarlyView.
ABSTRACT There is now a wealth of glass‐shard geochemical data for volcanic ash (tephra) layers from a wide range of volcanoes and eruptions, providing invaluable datasets for tephrochronology. However, compilation of published data to assess tephra correlations leads to large files and requires careful management.
Victoria C. Smith, Danielle McLean, Eloise Wilkinson‐Rowe, Emma L. Horn, Gavin Kane, Christopher Bronk Ramsey   +5 more
wiley   +1 more source

Effects of sex and altitude on nutrient, and carbon and nitrogen stable isotope composition of the endangered shrub Baccharis concinna G.M. Barroso (Asteraceae)

Acta Botânica Brasílica
Previous ecological studies of dioecious plant species have found that female plants preferentially occur at lower altitudes where there are typically better nutritional conditions, while male plants often occur in less favorable sites.
G. Wilson Fernandes, Heitor Monteiro Duarte, Fernando A. O. Silveira, Fernando Broetto, Ulrich Lüttge, Heinz Rennenberg   +5 more
doaj   +1 more source

Stable isotope analysis of freshwater gastropod carbonates from Swanscombe: Insights into climate stability and seasonality during MIS 11c

Journal of Quaternary Science, EarlyView.
ABSTRACT Stable isotope analyses of freshwater mollusc carbonate can record environmental conditions at the time of mineralisation, yet this technique remains underused in British Middle Pleistocene fluvial sequences, despite the abundance of fossil shell material in these deposits.
Jennifer E. Sherriff, Ian Candy, Adrian P. Palmer, Danielle C. Schreve, Tom S. White   +4 more
wiley   +1 more source

Southern Portugal hydroclimate of the last millennium from near‐annually resolved speleothem records

Journal of Quaternary Science, EarlyView.
ABSTRACT Hydroclimate in Portugal is influenced by the North Atlantic subtropical high‐pressure system (the Azores High) and by internal climate modes, most prominently the North Atlantic Oscillation, which may shift in position and/or intensity due to anthropogenic climate change.
Alaina Chormann, Alan D. Wanamaker, Diana Thatcher, David P. Gillikin, Yemane Asmerom, Victor Polyak, Caroline C. Ummenhofer, Frederico Tátá Regala, Anouk Verheyden, Suzanne Ankerstjerne, Rhawn F. Denniston   +10 more
wiley   +1 more source

An explainable machine learning framework for predicting phosphate oxygen isotopes: Identifying environmental drivers in agricultural watersheds

Ecological Indicators
Excessive phosphorus inputs from agricultural activities are a major driver of freshwater eutrophication worldwide. Phosphate oxygen isotopes (δ18Op) provide a powerful tracer for identifying phosphate (PO43−) sources and cycling processes at the ...
Shaobo Yu, Cen Meng, Huanyao Liu, Yuyuan Li, Xianli Xu, Wei Ouyang   +5 more
doaj   +1 more source

Long‐Term Operation of Photovoltaic Power Stations Promotes Soil Carbon Sequestration but Induces Stoichiometric C:N:P Imbalance in Desert Ecosystems

Land Degradation &Development, EarlyView.
ABSTRACT Soil carbon‐nitrogen‐phosphorus (C:N:P) stoichiometry governs nutrient cycling and carbon sequestration in desert ecosystems, yet how large‐scale photovoltaic (PV) deployment, a cornerstone of global carbon neutrality, shifts these stoichiometric balances and whether such shifts enhance or degrade long‐term land function remain unresolved over
Anlin Wang, Fenghua Sun, Longfei Chen, Hong Yang, Panxing He, Zhanjun Wang, Xudong Wu, D. M. Sabra, Rui Ma, Jianhua Xiao   +9 more
wiley   +1 more source

Long‐Term Nitrogen Addition Weakens the Linkage Between Phosphorus Cycling Gene Abundance and Phosphatase Activity Through Soil Acidification in a Larix gmelinii Plantation

Land Degradation &Development, EarlyView.
ABSTRACT Anthropogenic nitrogen (N) enrichment propels global forest ecosystems toward phosphorus (P) limitation, theoretically triggering the upregulation of microbial P‐acquisition capacity to maintain stoichiometric balance. However, the extent to which N addition regulates this adaptive capacity remains uncertain.
Xiang Zhang, Qiong Zhao, Liman Wei, Su Mei, Yonghong Ma, Linhui Wu, Yuan Zhao   +6 more
wiley   +1 more source