Stable Isotopes As Tracer Of Water Cycling From Precipitation To Tap Water Across Canada

High impact invasive plant species, such as the N-fixing and water-spending tree Acacia longifolia, are a major threat to ecosystem functioning worldwide. For example, Acacia's impact on nutrient and water-cycling in Mediterranean dune ecosystems is well understood. However, early detection of such impacts remains challenging. Therefore, novel approaches are required to map functional indicators of high invader impact. Here, we tested in a real world context if the stable isotopes &#948;13C and &#948;15N could be such mappable indicators. First, we show that A. longifolia differs regarding its biochemical leaf traits from the native species of the same growth form particularly regarding leaf N content as well as &#948;13C and &#948;15N. This may indicate a high impact on N and water cycling, and can be retrieved from hyperspectral data. Second, the impact of the invader on N cycling was mapped joining the spatial distribution of &#948;15N with airborne laserscanning data. Foliar &#948;15N of a non-fixing, native species increased in vicinity of invasive stands indicating an uptake of N previously fixed by the invader. Finally, those impacts possibly result in an increase of productivity of the whole dune ecosystem even when invader cover is low. This increase can be mapped integrating hyperspectral imagery with LiDAR data. Thus, there is potential to retrieve functional indicators of high impact including stable isotopes using remote sensing.

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Spatial analysis of hydrogen and oxygen stable isotopes (“isoscapes”) in ground water and tap water across South Africa

Journal of Geochemical Exploration ◽

10.1016/j.gexplo.2014.06.009 ◽

2014 ◽

Vol 145 ◽

pp. 213-222 ◽

Cited By ~ 75

Author(s):

A.G. West ◽

E.C. February ◽

G.J. Bowen

Keyword(s):

South Africa ◽

Stable Isotopes ◽

Spatial Analysis ◽

Ground Water ◽

Tap Water ◽

Oxygen Stable Isotopes

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The use of stable isotopes ratios for authentication of fruit juices

Chemical Papers ◽

10.2478/s11696-011-0105-3 ◽

2012 ◽

Vol 66 (2) ◽

Cited By ~ 5

Author(s):

Dana Magdas ◽

Nicoleta Vedeanu ◽

Romulus Puscas

Keyword(s):

Stable Isotopes ◽

Quantitative Determination ◽

Crassulacean Acid Metabolism ◽

Acid Metabolism ◽

Tap Water ◽

Co2 Assimilation ◽

Fruit Juices ◽

Added Sugar ◽

Δ 13C

AbstractThe determination of the content of stable isotopes, 18O and 2H, respectively, in juice water facilitates the distinction between authentic juices and juices made from concentrates by redilution with tap water. At the same time, the detection of C4 cane or corn-derived sugar syrups in fruit juices which are produced from C3 fruit types is thus facilitated by the characteristic differences in 13C/12C, expressed as δ 13C (‰) values due to photosynthetic CO2 assimilation via the C3−, C4−, and crassulacean acid metabolism pathways. In this study, the quantitative determination of water added to an authentic juice, on the basis of δ 18O, and δ 2H values, respectively, was successfully performed. Also, the δ 18O, and δ 2H of juice water and δ 13C of the whole juice in 18 samples were also determined. The results obtained provided us with the possibility of distinguishing between authentic fruit juices and those obtained by redilution of concentrated fruit juices and the detection of C4 type added sugar.

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About this title - Stable Isotope Studies of the Water Cycle and Terrestrial Environments

Geological Society London Special Publications ◽

10.1144/sp507 ◽

2021 ◽

Vol 507 (1) ◽

pp. NP-NP

Author(s):

A.-V. Bojar ◽

A. Pelc ◽

C. Lécuyer

Keyword(s):

Stable Isotopes ◽

Environmental Changes ◽

Water Cycle ◽

Tap Water ◽

Underground Water ◽

Clumped Isotopes ◽

Main Research ◽

Continental Scale ◽

Terrestrial Environments ◽

North And South America

This volume is devoted to Earth surface environmental reconstructions and environmental changes that may be deciphered and modelled using stable isotopes along with mineralogical/chemical, sedimentological, palaeontological/biological and climatological methodologies. The book is divided into two sections, both using stable isotopes (δD, δ18O, δ13C, d15N, δ34S, clumped isotopes Δ47) in various samples and phases as the main research tool. The first section is devoted to studies focusing on the distribution of isotopes in precipitation, groundwater, lakes, rivers, springs, tap water, mine water and their relationship with terrestrial environments at regional to continental scale. In relation to this, the second section includes case studies from a range of continental settings, investigating cave deposits (stalagmites, bat guano), animal skeletons (dinosaurs, alligators, turtles, bivalves), present and past soils (palaeosols) and limestones. The sections focus on the interaction between the surficial water cycle and underground water storage with deposits acting as archives of short- to long-term climatic and environmental changes. Examples from the Early Cretaceous to present time come from Europe, Asia, Africa, North and South America.

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