Results 31 to 40 of about 95,714 (157)
Applied Sciences, 2018 Nitrate pollution in surface water has become an environmental problem of global concern. The effective way for controlling the nitrate pollution of surface water is to identify the pollution source and reduce the input of nitrate.
Yan Zhang, Peng Shi, Jinxi Song, Qi Li
doaj +1 more source
Data in Brief, 2023 A comprehensive hydrogeological report was conducted to determine the origin, occurrence and processes affecting nitrogen in a Mediterranean coastal aquifer-lagoon system.
A. Menció +4 more
doaj +1 more source
Determining trophic niche width: a novel approach using stable isotope analysis [PDF]
, 2004 1. Although conceptually robust, it has proven difficult to find practical measures of niche width that are simple to obtain, yet provide an adequate descriptor of the ecological position of the population examined. 2.
Adams, C.E. +4 more
core +1 more source
Assortative Mating By Diet In A Phenotypically Unimodal But Ecologically Variable Population Of Stickleback [PDF]
, 2008 Speciation with gene flow may be driven by a combination of positive assortative mating and disruptive selection, particularly if selection and assortative mating act on the same trait, eliminating recombination between ecotype and mating type ...
Bolnick, Daniel I., Snowberg, Lisa K.
core +1 more source
Stable isotopes of Hawaiian spiders reflect substrate properties along a chronosequence. [PDF]
, 2018 The Hawaiian Islands offer a unique opportunity to test how changes in the properties of an isolated ecosystem are propagated through the organisms that occur within that ecosystem.
Dawson, Todd +2 more
core +2 more sources
NITROGEN ISOTOPIC FRACTIONATION IN INTERSTELLAR AMMONIA [PDF]
The Astrophysical Journal, 2010 4 pages, 2 figures, 1 ...
Lis, Darek C. +3 more
openaire +4 more sources
Biology, 2023 The purpose of this study is to gain insights into the subsistence activities and nutrition of the Samnite and Peligni populations who lived in the Abruzzo region (Italy) during the Iron Age. The samples under investigation are from Opi Val Fondillo (AQ)
Iuri Icaro +2 more
doaj +1 more source
Reactive and mixing processes governing ammonium and nitrate coexistence in a polluted coastal aquifer [PDF]
, 2018 A comprehensive hydrochemical, stable isotope and microbial analyses characterisation has been performed to evaluate the sources of groundwater, nitrogen pollution and degradation processes occurring in an industrial polluted coastal aquifer in the ...
Aravena, Ramon +4 more
core +2 more sources
Nitrogen Isotopes in Deep Time [PDF]
, 2021 Nitrogen is an essential nutrient for life, and its sources and cycling have varied over earth history. Stable isotope ratios of nitrogen compounds (expressed as δ15N, in ‰) are preserved in the sedimentary record and track these changes, providing important insights into associated biogeochemical feedbacks.
Mettam, Colin, Zerkle, Aubrey L.
openaire +2 more sources
Freezing and chemical preservatives alter the stable isotope values of carbon and nitrogen of the Asiatic clam (Corbicula fluminea) [PDF]
, 2011 We tested the impacts of most common sample preservation methods used for aquatic sample materials on the stable isotope ratios of carbon and nitrogen in clams, a typical baseline indicator organism for many aquatic food web studies utilising stable ...
Aurélia Martino +22 more
core +5 more sources