Results 41 to 50 of about 128,824 (253)

Marine sediment nitrogen isotopes and their implications for the nitrogen cycle in the sulfate-methane transition zone

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, Xin Yang, Yihao Zhang, Yihao Zhang, Xiaoming Sun, Xiaoming Sun, Xiaoming Sun, Li Xu, Li Xu, TingTing Chen, TingTing Chen   +10 more
doaj   +1 more source

Nitrogen isotopes link mycorrhizal fungi and plants to nitrogen dynamics [PDF]

New Phytologist, 2012
SummaryIn this review, we synthesize field and culture studies of the 15N/14N (expressed as δ15N) of autotrophic plants, mycoheterotrophic plants, parasitic plants, soil, and mycorrhizal fungi to assess the major controls of isotopic patterns. One major control for plants and fungi is the partitioning of nitrogen (N) into either 15N‐depleted chitin ...
Hobbie, Erik A., Hogberg, Peter
openaire   +3 more sources

Provenance does matter: links between winter trophic segregation and the migratory origins of European robins [PDF]

, 2016
Amongst migratory species, it is common to find individuals from different populations or geographical origins sharing staging or wintering areas.
Bearhop, Stuart,, Campos, Ana R.,, Catry, Paulo,, Granadeiro, José Pedro,, Lund University., Neto, Júlio M.,, Newton, Jason,, Ramos, Jaime,   +7 more
core   +1 more source

Nitrogen isotope discrimination in open-pollinated and hybrid canola suggests indirect selection for enhanced ammonium utilization

Frontiers in Plant Science, 2022
Nitrogen isotope discrimination (Δ15N) may have utility as an indicator of nitrogen use in plants. A simple Δ15N-based isotope mass balance (IMB) model has been proposed to provide estimates of efflux/influx (E/I) ratios across root plasma membranes, the
Yi Hu, Yi Hu, Robert D. Guy, Raju Y. Soolanayakanahally   +3 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., Bearhop, S., Fuller, R.A., Macleod, H., Waldron, S.   +4 more
core   +1 more source

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, Paul Szpak, Michael P Richards   +2 more
doaj   +1 more source

Seasonal Trophic Dynamics of Sinking Particles in the Ulleung Basin of the East Sea (Japan Sea): An Approach Employing Nitrogen Isotopes of Amino Acids

Frontiers in Marine Science, 2022
To identify the sources of organic matter, we examined nitrogen isotopes of the amino acids of sinking particles collected from July 2017 to March 2018 at 1000 and 2250 m in the Ulleung Basin, the southwestern part of the East Sea (Japan Sea).
Hyuntae Choi, Jeomshik Hwang, Yeongjin Ryu, Guebuem Kim, Kyung-Hoon Shin   +4 more
doaj   +1 more source

Stable isotope analysis provides new information on winter habitat use of declining avian migrants that is relevant to their conservation [PDF]

, 2012
Winter habitat use and the magnitude of migratory connectivity are important parameters when assessing drivers of the marked declines in avian migrants. Such information is unavailable for most species.
BJM Stutchbury, BN Smith, C Eraud, C Fry, CM Perrins, CP Chamberlain, D Lack, D Norman, DI Pearson, DJ Pain, DS Wilcove, E Yohannes, FJ Sanderson, G Gory, GD Farquhar, GJ Morel, I Burfield, I Newton, JA Grey, Jason Newton, JC Sealy, JC Vogel, JF Kelly, JM Neto, John W. Mallord, JR Ehleringer, K Risely, KA Hobson, Karl L. Evans, KL Evans, L Jenni, L Svensson, L Zwarts, LA Hill, M Cardillo, M Schaub, MB Hernquist, MJA Werger, MS Webster, N Cooper, N Saino, Ofer Ovadia, P Chantler, P Marra, RA Robinson, RF Inger, RP Ellis, S Bearhop, S Bensch, S Oppel, S Shultz, SD Newsome, SH Ambrose, Shai Markman, T Szép, T Szép, TB Coplen, TB Oatley, TS Reichlin, WJ Peach   +59 more
core   +4 more sources

Nitrate stable isotopes and major ions in snow and ice samples from four Svalbard sites [PDF]

, 2015
Increasing reactive nitrogen (N-r) deposition in the Arctic may adversely impact N-limited ecosystems. To investigate atmospheric transport of N-r to Svalbard, Norwegian Arctic, snow and firn samples were collected from glaciers and analysed to define ...
Aanes R., Alina Marca, Amoroso A., Atkin O.K, Beaudon E., Beine H.J., Björkman M.P, Björkman M.P., Björkman M.P., Blunier T., Bottenheim J.W., Brimblecombe P., Burkhart J.F., Carmen P. Vega, Carroll M.A., Casciotti K.L., Coplen T.B., Dibb J.E., Dickson L.G, Draxler R.R., Elisabeth Isaksson, Eneroth K., Felix J.D., Forsström S., Freyer H.D, Freyer H.D., Førland E.J., Gibbons J.D., Goto-Azuma K., Hastings M.G, Hastings M.G., Hastings M.G., Heaton T.H.E, Heaton T.H.E., Hisdal V, Honrath R.E., Honrath R.E., Jan Kaiser, Jarvis J.C., Kahl J.D.W., Kaiser J., Kang S., Kekonen T., Kühnel R., Kühnel R., Li D., Liu S.C., Mats P. Björkman, Michalski G., Morin S., Morin S., Morin S., Morin S., Mosier A.R., Nuth C., Pohjola V.A., Rickard Pettersson, Rinnan R., Ruggirello R.M., Röthlisberger R., Samyn D., Schuler T.V., Semb A., Shaver G.R., Stohl A., Tõnu Martma, Vega C.P., Veijo A. Pohjola, Wolff E.W, Xu L.   +69 more
core   +2 more sources

Multiple carriers of Q noble gases in primitive meteorites [PDF]

, 2015
The main carrier of primordial heavy noble gases in chondrites is thought to be an organic phase, known as phase Q, whose precise characterization has resisted decades of investigation.
Amari, Brearley, Busemann, Clark, Crowther, Crozaz, Derenne, Gilmour, Gilmour, Goles, Gros, Guillaume Avice, Hewins, Hohenberg, Huss, Huss, Kellerud, Kerridge, Lewis, Lewis, Marrocchi, Marrocchi, Marrocchi, Marrocchi, Marrocchi, Marrocchi, Mathew, Matsuda, Meshik, Meshik, Nicolas Estrade, Nishimura, Ott, Ozima, Piani, Ragettli, Tachibana, Verchovsky, Vogel, Wieler, Yves Marrocchi   +40 more
core   +2 more sources