Fishing for fat: why learning to use tools is worth it for the New Caledonian crow - Phenomena	Fishing for fat: why learning to use tools is worth it for the New Caledonian crow - Phenomena

They eat wood and they digest it with special bacteria in their guts, which dramatically sway their ratio of nitrogen isotopes. ... and measuring the ratio of carbon and nitrogen isotopes (slightly different versions of the same atoms). These values reflect ... In terms of isotopes, beetle grubs stand out. ... each of which has a different isotope signature. As the ...
more infohttp://phenomena.nationalgeographic.com/2010/09/16/fishing-for-fat-why-learning-to-use-tools-is-worth-it-for-the-new-caledonian-crow/

Exome Genotyping and Association Genetics of Quantitative Traits in a Clonally Tested Loblolly Pine Population (Pinus taeda L.)Exome Genotyping and Association Genetics of Quantitative Traits in a Clonally Tested Loblolly Pine Population (Pinus taeda L.)

... carbon isotope discrimination (2), nitrogen concentration (1), and pitch canker resistance (3). Non-additive effects imposed by ... carbon isotope discrimination (4), nitrogen concentration (2), and pitch canker resistance (7). Eleven SNP-SNP interactions ...
more infohttp://oaktrust.library.tamu.edu/handle/1969.1/158662

nitrogen isotopes | LCZO-Datanitrogen isotopes | LCZO-Data

nitrogen isotopes. Ciguatera Toxins in the food chain revealed by Stable Isotopes. Mon, 01/30/2012 - 13:14 - leonmi Winter A., ... Dual stable isotope analyses (delta 13C and delta 15N) of fiddler crabs from a forest-fringed, land-locked lagoon in Puerto ... Estimating the assimilation of mangrove detritus by fiddler crabs in Laguna Joyuda, Puerto Rico, using dual stable isotopes. ... Estimating the assimilation of mangrove detritus by fiddler crabs in laguna joyuda, puerto rico, using dual stable isotopes. ...
more infohttps://www.sas.upenn.edu/lczodata/category/research-paper-keywords/nitrogen-isotopes

Convergence of soil nitrogen isotopes across global climate gradientsConvergence of soil nitrogen isotopes across global climate gradients

In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual ... Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary ... In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual ... Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary ...
more infohttps://pubs.er.usgs.gov/publication/70140605

Postdoc opportunity in Chemical Oceanography (stable nitrogen isotopes) at GEOMAR | POGOPostdoc opportunity in Chemical Oceanography (stable nitrogen isotopes) at GEOMAR | POGO

Postdoc opportunity in Chemical Oceanography (stable nitrogen isotopes) at GEOMAR. The Collaborative Research Centre ( ... and application of analytical methods for the determination of stable nitrogen isotope signatures of dissolved nitrogen ... The work is part of several subprojects of the SFB754 with the aim to decipher nitrogen pathways in the water column and in the ... Experience with methods to determine stable isotopes is desired but not mandatory. The successful candidate is expected to ...
more infohttp://ocean-partners.org/postdoc-opportunity-in-chemical-oceanography-stable-nitrogen-isotopes-at-geomar

Mechanism for nitrogen isotope fractionation during ammonium assimilation by Escherichia coli K12 | PNASMechanism for nitrogen isotope fractionation during ammonium assimilation by Escherichia coli K12 | PNAS

Mechanism for nitrogen isotope fractionation during ammonium assimilation by Escherichia coli K12. Jason Vo, William Inwood, ... Fractionation of heavy and light isotopes of nitrogen (15N vs. 14N), carbon (13C vs. 12C), and hydrogen (D vs. H) can provide ... We used isotope ratio mass spectrometry (MS) to assess the nitrogen isotopic composition of cell material when the strains were ... 1985) Use of nitrogen-15 and deuterium isotope effects to determine the chemical mechanism of phenylalanine ammonia-lyase. ...
more infohttps://www.pnas.org/content/110/21/8696?ijkey=b3d7c48250d7ab8f96ed8118cdcbddda4c0da54e&keytype2=tf_ipsecsha

Evaluation of contamination sources of groundwater NO3− using nitrogen isotope data: A review | SpringerLinkEvaluation of contamination sources of groundwater NO3− using nitrogen isotope data: A review | SpringerLink

It has been accepted that variations in stable N isotope ratios (15N/14N) can potentially provide useful, sometimes unique, ... information on the sources of nitrate in groundwater, because N isotope... ... Hübner, H., 1986, Isotope effects of nitrogen in the soil and biosphere. In: Fritz, P. and Fontes, J.C., (eds.), Handbook of ... Handley, L.L. and Raven, J.A., 1992, The use of natural abundance of nitrogen isotopes in plant physiology and ecology. Plant, ...
more infohttps://link.springer.com/article/10.1007%2FBF02910268

Stable carbon and nitrogen isotopes in the Wudinghe drainage basin--《Geochimica》2004年06期Stable carbon and nitrogen isotopes in the Wudinghe drainage basin--《Geochimica》2004年06期

... relativity exists between stable carbon and nitrogen isotopes in sediments along the river.St able carbon and nitrogen isotope ... the carbon isotope values show bimod al characteristics,but nitrogen is otopes have no relativity to carbon o nes.A weak ... behavior and to elucidate their distribution featu re on a district scale.An investigation of carbon and nitrogen isotope ... was conducted.It is found that the values of stable carbon and nitrogen isoto pes of plants in the basin have wide ra nges, ...
more infohttp://en.cnki.com.cn/Article_en/CJFDTotal-DQHX200406009.htm

Carbon, hydrogen and nitrogen isotopes in solvent-extractable organic matter from carbonaceous chondrites  - CaltechAUTHORSCarbon, hydrogen and nitrogen isotopes in solvent-extractable organic matter from carbonaceous chondrites - CaltechAUTHORS

Carbon, hydrogen and nitrogen isotopes in solvent-extractable organic matter from carbonaceous chondrites ... Becker, Richard H. and Epstein, Samuel (1982) Carbon, hydrogen and nitrogen isotopes in solvent-extractable organic matter from ... Richard H Becker, Samuel Epstein, Carbon, hydrogen and nitrogen isotopes in solvent-extractable organic matter from ... Organic matter soluble in CCl_4 has essentially no nitrogen, and δ^(13)C and δD values are lower than for CH_3OH-soluble phases ...
more infohttps://authors.library.caltech.edu/42134/

Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of 15N...Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of 15N...

Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of 15N ... Rennie, D. A. & Paul, E. A. (1975). Nitrogen isotope ratios in surface and subsurface soil horizons. In Isotope ratios as ... Nitrogen isotope ratios in surface and sub-surface horizons of new zealand improved grassland soils. New Zealand Journal of ... Stable carbon and nitrogen isotope analysis of human and animal diet in Africa. Journal of Human Evolution, Vol. 15, Issue. 8, ...
more infohttps://www.cambridge.org/core/journals/journal-of-agricultural-science/article/fractionation-of-nitrogen-isotopes-by-animals-a-further-complication-to-the-use-of-variations-in-the-natural-abundance-of-15n-for-tracer-studies/0EB349D52EA53EF85EC92D78552EEF93

Nitrogen isotope discrimination in white spruce fed with low concentrations of ammonium and nitrate | SpringerLinkNitrogen isotope discrimination in white spruce fed with low concentrations of ammonium and nitrate | SpringerLink

Högberg P, Högberg MN, Quist ME, Ekblad A, Nasholm T (1999) Nitrogen isotope fractionation during nitrogen uptake by ... Discrimination of nitrogen isotopes during absorption of ammonium and nitrate at different nitrogen concentrations by rice ( ... Evans RD (2001) Physiological mechanisms influencing plant nitrogen isotope composition. Trends Plant Sci 6:121-126CrossRef ... Handley LL, Raven JA (1992) The use of natural abundance of nitrogen isotopes in plant physiology and ecology. Plant Cell ...
more infohttps://link.springer.com/article/10.1007%2Fs00468-004-0367-2

Atmosphere | Free Full-Text | Nitrogen Isotope Fractionation and Origin of Ammonia Nitrogen Volatilized from Cattle Manure in...Atmosphere | Free Full-Text | Nitrogen Isotope Fractionation and Origin of Ammonia Nitrogen Volatilized from Cattle Manure in...

Long-term (30 days) monitoring of δ15N of manure and emitted ammonia indicated that the dynamics of N isotope fractionation may ... isotope composition of cattle manure and ammonia emissions, potential contribution of nitrogenous gases other than ammonia to ... be complicating the usefulness of the isotope approach as a tool for estimating ammonia emissions from manure in field ... A series of laboratory experiments were conducted to establish the relationship between nitrogen (N) ...
more infohttps://www.mdpi.com/2073-4433/2/3/256

BGD - Century-scale wood nitrogen isotope trajectories from an oak savanna with variable fire frequenciesBGD - Century-scale wood nitrogen isotope trajectories from an oak savanna with variable fire frequencies

Century-scale wood nitrogen isotope trajectories from an oak savanna with variable fire frequencies Matthew Trumper. 1, Daniel ... We developed century-scale records of wood nitrogen isotopes (δ15N) from 16 trees across a long-term savanna fire experiment. ... We developed century-scale records of wood nitrogen isotopes (δ15N) from 16 trees across a... ... Century-scale wood nitrogen isotope trajectories from an oak savanna with variable fire frequencies, Biogeosciences Discuss., ...
more infohttps://www.biogeosciences-discuss.net/bg-2020-6/

Frontiers | Complexities of Stable Carbon and Nitrogen Isotope Biogeochemistry in Ancient Freshwater Ecosystems: Implications...Frontiers | Complexities of Stable Carbon and Nitrogen Isotope Biogeochemistry in Ancient Freshwater Ecosystems: Implications...

This review outlines two thematic areas in which this surge in stable isotope applications to the study of ancient human ... This review outlines two thematic areas in which this surge in stable isotope applications to the study of ancient human ... First, building on studies conducted in modern ecosystems, this paper outlines key aspects of the stable isotope ecology of ... First, building on studies conducted in modern ecosystems, this paper outlines key aspects of the stable isotope ecology of ...
more infohttps://www.frontiersin.org/articles/10.3389/fevo.2019.00313/full

On the sedimentological origin of downcore variations of bulk sedimentary nitrogen isotope ratios  - ePICOn the sedimentological origin of downcore variations of bulk sedimentary nitrogen isotope ratios - ePIC

On the sedimentological origin of downcore variations of bulk sedimentary nitrogen isotope ratios ... On the sedimentological origin of downcore variations of bulk sedimentary nitrogen isotope ratios , Paleoceanography . doi: ...
more infohttp://epic.awi.de/14222/

CiNii Articles - 
 		
			Carbon and nitrogen isotope analyses of human and dog diet in the Okhotsk culture: perspectives from...CiNii Articles - Carbon and nitrogen isotope analyses of human and dog diet in the Okhotsk culture: perspectives from...

Carbon and nitrogen isotope analyses of human and dog diet in the Okhotsk culture: perspectives from the Moyoro site, Japan * * ... the variances of carbon isotope ratios were significantly greater in males. Carbon and nitrogen isotope ratios suggest that the ... In this study, we present the results of carbon and nitrogen isotope analyses of 18 faunal (including two domesticated dogs) ... Although the mean human isotope ratios did not differ between sexes, ...
more infohttps://ci.nii.ac.jp/naid/130004832139

Environmental changes in the Late Ordovician-early Silurian: Review and new insights from black shales and nitrogen isotopes |...Environmental changes in the Late Ordovician-early Silurian: Review and new insights from black shales and nitrogen isotopes |...

Environmental changes in the Late Ordovician-early Silurian: Review and new insights from black shales and nitrogen isotopes ... Nitrogen isotope data show that the regions of oceanic anoxia were marked by intense water-column denitrification in which ... Superheavy S isotopes from glacier-associated sediments of the Neoproterozoic of south China: Oceanic anoxia or sulfate ... The shift to more positive N isotope values also suggests less intense water-column denitrification. In the overlying late ...
more infohttps://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/125/11-12/1635/125852/environmental-changes-in-the-late-ordovician-early?redirectedFrom=fulltext

Pedersen, TF; Farrell, JW (2002): CaCO3 and nitrogen isotope data of sediment core Y71-3-2Pedersen, TF; Farrell, JW (2002): CaCO3 and nitrogen isotope data of sediment core Y71-3-2

CaCO3 and nitrogen isotope data of sediment core Y71-3-2. PANGAEA, https://doi.org/10.1594/PANGAEA.81156 ... Pedersen, Thomas F; Farrell, John W (2000): Nitrogen isotope data from equatorial Pacific sediment cores. JGOFS Canada Data ... Pedersen, Thomas F; Farrell, John W (2002): CaCO3 and nitrogen isotope data of sediment core Y71-3-2. PANGAEA, https://doi.org/ ...
more infohttps://doi.pangaea.de/10.1594/PANGAEA.81156

Tracking aquatic change using chlorin‐specific carbon and nitrogen isotopes: The last glacial‐interglacial transition at Lake...Tracking aquatic change using chlorin‐specific carbon and nitrogen isotopes: The last glacial‐interglacial transition at Lake...

These data highlight both the potential and difficulty of using chlorin-specific isotopes to track aquatic change from lake ... our data suggest that the isotopic composition of phaeophytin a and pyrophaeophytin a can be imprecise proxies for the isotope ... Joint carbon and nitrogen isotope measurements were made from chlorins (chlorophyll a, phaeophytin a and pyrophaeophytin a) ... of chlorins in the modern environment is required in order to facilitate a more rigorous approach to interpreting isotope ...
more infohttps://www.semanticscholar.org/paper/Tracking-aquatic-change-using-chlorin%E2%80%90specific-and-Tyler-Kashiyama/eb7087b8e92cf91b19a2494f5c238ce24ebe68ad

History of anthropogenic nitrogen input to the German Bight/SE North Sea as reflected by nitrogen isotopes in surface sediments...History of anthropogenic nitrogen input to the German Bight/SE North Sea as reflected by nitrogen isotopes in surface sediments...

History of anthropogenic nitrogen input to the German Bight/SE North Sea as reflected by nitrogen isotopes in surface sediments ... History of anthropogenic nitrogen input to the German Bight/SE North Sea as reflected by nitrogen isotopes in surface sediments ...
more infohttp://epic.awi.de/23731/

Stable carbon and nitrogen isotope trophic enrichment factors for Steller sea lion vibrissae relative to milk and fish...Stable carbon and nitrogen isotope trophic enrichment factors for Steller sea lion vibrissae relative to milk and fish...

Stable carbon and nitrogen isotope trophic enrichment factors for Steller sea lion vibrissae relative to milk and fish/ ... Stable carbon and nitrogen isotope trophic enrichment factors for Steller sea lion vibrissae relative to milk and fish/ ...
more infohttps://pubs.er.usgs.gov/publication/70144008

Tracing sources of ammonium in reducing groundwater in a well field in Hanoi (Vietnam) by means of stable nitrogen isotope ...Tracing sources of ammonium in reducing groundwater in a well field in Hanoi (Vietnam) by means of stable nitrogen isotope ...

Tracing sources of ammonium in reducing groundwater in a well field in Hanoi (Vietnam) by means of stable nitrogen isotope ( ... We traced the sources of NH4+ at the Nam Du well field of the Hanoi water works by means of isotope ratios (N-15/N-14). The ...
more infohttp://kth.diva-portal.org/smash/record.jsf?pid=diva2:859271

Carbon and nitrogen stable isotopes in fast food: Signatures of corn and confinement | PNASCarbon and nitrogen stable isotopes in fast food: Signatures of corn and confinement | PNAS

For nitrogen isotopes in meat products, variability was constrained, relative to carbon isotopes. The entire range in δ15N ... A Dual-Carbon-and-Nitrogen Stable Isotope Ratio Model Is Not Superior to a Single-Carbon Stable Isotope Ratio Model for ... Carbon and nitrogen stable isotopes in fast food: Signatures of corn and confinement. A. Hope Jahren and Rebecca A. Kraft ... Carbon and nitrogen stable isotope values of all foods sampled, positioned according to geographic region (A-E). Chains are ...
more infohttps://www.pnas.org/content/105/46/17855.long

Carbon and nitrogen isotope composition of Inner Mongolia grassland : spatio-temporal variations at multiple scales - SécheresseCarbon and nitrogen isotope composition of Inner Mongolia grassland : spatio-temporal variations at multiple scales - Sécheresse

Carbon (δ13C) and nitrogen (δ15N) stable isotope compositions were used to elaborate the influences of changes in biotic and ... Carbon and nitrogen isotope composition of Inner Mongolia grassland : spatio-temporal variations at multiple scales. Wittmer, ... Carbon and nitrogen isotope composition of Inner Mongolia grassland : spatio-temporal variations at multiple scales ... Titre : Carbon and nitrogen isotope composition of Inner Mongolia grassland : spatio-temporal variations at multiple scales ...
more infohttp://www.secheresse.info/spip.php?article45641

Relationship of nitrogen isotope fractionation to phytoplankton size and iron availability during the Southern Ocean Iron...Relationship of nitrogen isotope fractionation to phytoplankton size and iron availability during the Southern Ocean Iron...

Karsh, Kristen Leigh and Antarctic CRC, 2004 , Relationship of nitrogen isotope fractionation to phytoplankton size and iron ... Relationship of nitrogen isotope fractionation to phytoplankton size and iron availability during the Southern Ocean Iron ...
more infohttps://eprints.utas.edu.au/20583/