Results 21 to 30 of about 121,467 (287)

Tracing water sources of terrestrial animal populations with stable isotopes: laboratory tests with crickets and spiders. [PDF]

PLoS ONE, 2010
Fluxes of carbon, nitrogen, and water between ecosystem components and organisms have great impacts across levels of biological organization. Although much progress has been made in tracing carbon and nitrogen, difficulty remains in tracing water sources
Kevin E McCluney, John L Sabo
doaj   +1 more source

Interpretation of Nitrogen Isotope Profiles in Petroleum Systems: A Review

Frontiers in Earth Science, 2021
Bulk sedimentary nitrogen isotope profiles are often used as proxies for depositional redox conditions, nitrogen cycling, and nutrient uptake in modern and ancient marine systems. The general preference in terms of analysis is that the sediments measured
Tracy M. Quan, Oyeleye O. Adeboye
doaj   +1 more source

Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of ¹⁵N for tracer studies [PDF]

, 1978
A study of the fractionation of nitrogen isotopes in the diet by cattle is described and the results discussed. Compared with the diet, urine had a lower ratio of ¹⁵N to ¹⁴N, but faeces, blood and milk all had a higher ratio. It is argued that the use of
Daniel, Roy M., Steele, K.W.
core   +2 more sources

Do oxygen isotope values in collagen reflect the ecology and physiology of neotropical mammals?

Frontiers in Ecology and Evolution, 2015
Stable isotope data provide insight into the foraging ecology of animals. Traditionally, carbon and nitrogen isotope values have been used to infer dietary and habitat preferences.
Brooke eCrowley, Amanda Dawn Melin, Amanda Dawn Melin, Justin Douglas Yeakel, Justin Douglas Yeakel, Nathaniel Jay Dominy   +5 more
doaj   +1 more source

Subsurface tropical Pacific nitrogen isotopic composition of nitrate: Biogeochemical signals and their transport [PDF]

, 2011
We report measurements of the nitrogen isotopic composition of nitrate (the δ15N of NO3−) across the equatorial Pacific, for zonal transects from 165°E to 95°W and meridional transects across 95° and 110°W.
Charles, Christopher D., Haug, Gerald H., Kaiser, Jan, Rafter, Patrick A., Sigman, Daniel M.   +4 more
core   +1 more source

Tree growth acceleration and expansion of alpine forests: The synergistic effect of atmospheric and edaphic change. [PDF]

, 2016
Many forest ecosystems have experienced recent declines in productivity; however, in some alpine regions, tree growth and forest expansion are increasing at marked rates.
Horwath, William R, Liang, Qianlong, Silva, Lucas CR, Sun, Geng, Wu, Ning, Zhu-Barker, Xia   +5 more
core   +2 more sources

Application of Nitrogen and Oxygen Isotopes for Source and Fate Identification of Nitrate Pollution in Surface Water: A Review

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

Life-history traits of the giant squid Architeuthis dux revealed from stable isotope signatures recorded in beaks [PDF]

, 2010
Peer ...
Alejandro B. Rodríguez-Navarro, Bode, Boyle, Cabana, Cherel, Cherel, Cherel, Cherel, Cherel, Chris S. Romanek, Clarke, Deagle, DeNiro, DeNiro, Field, González, Graham J. Pierce, Grist, Guerra, Guerra, Guerra, Hernández-López, Higgins, Hobson, Hobson, Hobson, Hunt, Jackson, McCutchan, Mendes, Miserez, Nixon, Parry, Pedro Álvarez-Lloret, Perales-Raya, Rau, Raya, Rodhouse, Roper, Ruiz-Cooley, Ruiz-Cooley, Schimmelmann, Seibel, Smith, Stowasser, Takai, Vanderklift, Webb, Zuur, Ángel F. González, Ángel Guerra   +50 more
core   +1 more source

Dataset for analyzing and modelling the eutrophication processes in groundwater-coastal lagoon systems: The La Pletera lagoons case study (NE Spain)

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, E. Madaula, W. Meredith, X. Casamitjana, X.D. Quintana   +4 more
doaj   +1 more source

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