Results 91 to 100 of about 95,822 (213)

Carbon and nitrogen isotopic ratios of urine and faeces as novel nutritional biomarkers of meat and fish intake [PDF]

open access: yes, 2012
Purpose Meat and fish consumption are associated with changes in the risk of chronic diseases. Intake is mainly assessed using self-reporting, as no true quantitative nutritional biomarker is available.
A Konig   +34 more
core   +1 more source

Variação na composição isotópica do Cynoscion guatucupa no Oceano Atlântico Sul [PDF]

open access: yes, 2017
The aim of this study was to analyze the isotopic composition in muscle of striped weakfish Cynoscion guatucupa from Southwest Atlantic Ocean in order to evaluate a possible variation in δ13C and δ15N in response to dietary shifts that occur as animals ...
Cappozzo, Humberto Luis   +4 more
core   +1 more source

Occurrence patterns of crop-foraging sika deer distribution in an agriculture-forest landscape revealed by nitrogen stable isotopes. [PDF]

open access: yesEcol Evol, 2021
Hata A   +10 more
europepmc   +1 more source

A New foodweb based on microbes in calcitic caves: The Cansiliella (Beetles) case in Northern Italy [PDF]

open access: yesInternational Journal of Speleology, 2011
The troglobitic beetle, Cansiliella servadeii (Leptodirini), has specialized mouthparts modified for browsing and feeding under percolating water on moonmilk, a speleothem formation in Grotta della Foos, Italy. Results from analyses of stable isotopes of
Paoletti Maurizio G.   +9 more
doaj  

Using stable isotopes to follow excreta N dynamics and N2O emissions in animal production systems

open access: yesAnimal, 2013
Nitrous oxide (N2O) is a potent greenhouse gas and the dominant anthropogenic stratospheric ozone-depleting emission. The tropospheric concentration of N2O continues to increase, with animal production systems constituting the largest anthropogenic ...
T.J. Clough, C. Müller, R.J. Laughlin
doaj   +1 more source

Quantifying carbon allocation to mycorrhizal fungi by temperate forest tree species across a nitrogen availability gradient [PDF]

open access: yes, 2013
Terrestrial ecosystems make up the largest carbon pool with a major portion of that being forests. With carbon being a major concern due to global climate change, being able to make accurate models is increasingly important. Studies have shown that trees
Tumber-Davila, Shersingh Joseph
core   +1 more source

Stable isotopes predict reproductive performance of European starlings breeding in anthropogenic environments

open access: yesEcosphere, 2016
Understanding reproductive performance in ecologically impoverished vs. more sustained anthropogenic habitats is critical to assess population health status and to develop land use and conservation management strategies.
Elizabeth Yohannes   +3 more
doaj   +1 more source

Stable Nitrogen Isotopes in a Forested Watershed in Taiwan

open access: yesJournal of Forest and Environmental Science, 2013
Abstract Differences in rates and patterns of nitrogen cycling have been correlated with nitrogen stable isotope measurements in forest ecosystems of tropical and temperate regions, but limited similar work has been conducted in sub-tropical forests. This study investigated patterns in stable N isotopic composition in a subtropical forest in Taiwan by ...
openaire   +2 more sources

Zinc Isotope Ratios as Indicators of Diet and Trophic Level in Arctic Marine Mammals.

open access: yesPLoS 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

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