Results 51 to 60 of about 130,387 (339)
Frontiers in Marine Science, 2023 IntroductionRecent work has proposed that the nitrogen isotopes in marine sediments can be impacted by anaerobic oxidation of methane (AOM), since nitrogen uptake by anaerobic methanotrophic archaea (ANME) modifies the nitrogen isotope compositions of ...
Xin Yang +10 more
doaj +1 more source
Seabird Modulations of Isotopic Nitrogen on Islands
PLoS ONE, 2012 The transport of nutrients by migratory animals across ecosystem boundaries can significantly enrich recipient food webs, thereby shaping the ecosystems' structure and function. To illustrate the potential role of islands in enabling the transfer of matter across ecosystem boundaries to be gauged, we investigated the influence of seabirds on nitrogen ...
Caut, Stéphane +9 more
openaire +10 more sources
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
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
Zinc Isotope Ratios as Indicators of Diet and Trophic Level in Arctic Marine Mammals.
PLoS ONE, 2016 Carbon and nitrogen stable isotope ratios of bone collagen are an established method for dietary reconstruction, but this method is limited by the protein preservation.
Klervia Jaouen +2 more
doaj +1 more source
Joint control of precipitation and CO2 on global long-term patterns of plant nitrogen availability
Nature CommunicationsPlant nitrogen availability critically limits plant growth and thus constrains terrestrial carbon sequestration. Growing evidence points to a recent decline in plant nitrogen availability, yet the global consistency of this trend and its underlying ...
Songbo Tang +3 more
doaj +1 more source
Frontiers in Marine Science, 2021 Bulk stable nitrogen isotope values of the carbonate-bound organic matrix in bivalve shells (δ15NCBOM) are increasingly used to assess past food web dynamics, track anthropogenic nitrogen pollution and reconstruct hydrographic changes.
Bernd R. Schöne, Qian Huang
doaj +1 more source
Silicon isotopes as a tracer for silicate utilization in the Peruvian upwelling [PDF]
, 2011 EGU2011-6081 Natural stable isotopes are a powerful tool in marine sciences to investigate biological processes, such as present and past nutrient utilization.
Ehlert, Claudia +3 more
core
Trophic ecology of the Endangered Darwin's frog inferred by stable isotopes [PDF]
, 2018 Indexación: Scopus.Acknowledgements. We thank Dr. Mauricio González-Chang for his contribution to invertebrate identification and Sally Wren for the revision of an earlier version of the manuscript. We are also extremely grateful to Tomás Elgueta Alvarez
Alvarado-Rybak, M. +4 more
core +1 more source
Molecular Oncology, EarlyView.We analyze cisplatin–DNA adducts (CDAs) and double‐strand breaks (DSBs) in a cell‐cycle‐dependent manner. We find that CDAs form similarly across all cell cycle phases. DSBs arise only in S‐phase. CDAs might not directly impair DSB repair, but S‐phase DSB lesions evolve in the presence of CDAs and disrupt repair in G2, also causing radiosensitization ...
Ye Qiu +10 more
wiley +1 more source