Results 61 to 70 of about 95,822 (213)

Sulphur-isotope compositions of pig tissues from a controlled feeding study [PDF]

, 2017
Sulphur-isotope determinations are becoming increasingly useful for palaeodietary reconstruction, but knowledge of isotopic discrimination between diet and various tissues remains inadequate. In this study, we explore the sensitivity of δ34Stissue values
Evershed, Richard P., Lewis, Jamie, Miller, Bevis, Newton, Jason, Stewart, Alan, Tarlton, John F., Webb, Emily C.   +6 more
core   +2 more sources

Nitrogen isotope ratio (δ15N): a nearly unexplored indicator that provides useful information in viticulture

OENO One
The study of the natural abundance of nitrogen-stable isotopes is an aspect of viticulture research that has received limited attention. While stable isotopes of carbon, oxygen and hydrogen have received significant attention, nitrogen isotope ratio ...
Luis Gonzaga Santesteban, Maite Loidi, Inés Urretavizcaya, Mónica Galar, Sara Crespo-Martínez, José Bernardo Royo, Carlos Miranda   +6 more
doaj   +1 more source

Uptake Patterns of Glycine, Ammonium, and Nitrate Differ Among Four Common Tree Species of Northeast China

Frontiers in Plant Science, 2019
Fundamental questions of how plant species within secondary forests and plantations in northeast China partition limited nitrogen (N) resource remain unclear.
Feifei Zhu, Feifei Zhu, Luming Dai, Luming Dai, Erik A. Hobbie, Keisuke Koba, Xueyan Liu, Geshere A. Gurmesa, Shaonan Huang, Shaonan Huang, Shanlong Li, Shanlong Li, Yinghua Li, Shijie Han, Yunting Fang, Yunting Fang   +15 more
doaj   +1 more source

Comparison Between Trophic Positions in the Barents Sea Estimated From Stable Isotope Data and a Mass Balance Model

Frontiers in Marine Science, 2022
The trophic position concept is central in system ecology, and in this study, trophic position (TP) estimates from stable-isotopes and an Ecopath mass-balance food web model for the Barents Sea were compared. Two alternative models for estimating TP from
Torstein Pedersen
doaj   +1 more source

Anadromous fish as marine nutrient vectors [PDF]

, 2009
The tidal freshwater of Virginia supports anadromous herring (Alosa spp.) spawning runs in the spring; however, their importance as nutrient delivery vectors to the freshwater fish food web remains unknown.
Garman, Greg C., MacAvoy, Stephen E., Macko, Stephen A.   +2 more
core  

Heavy metals effects on life traits of juveniles of Procambarus clarkii [PDF]

, 2019
An incubation experiment of juvenile crayfish (Procambarus clarkii) following a three- level treatment design approach was performed to assess the effect of different heavy metal concentrations on their life history traits (lifespan, growth, moult and ...
Alcorlo, Paloma, Baltanás, Angel, Lozano, Irene   +2 more
core   +1 more source

Stable Isotopes Reveal the Drivers of Post‐Wildfire Natural Regeneration of Interior Douglas‐Fir Seedlings in British Columbia

Ecology and Evolution
Wildfires are increasing in frequency and severity due to climate change, posing challenges to forest ecosystems, including the southern interior of British Columbia, Canada. Interior Douglas‐fir (Pseudotsuga menziesii var.
Julie McAulay, José Ignacio Querejeta, Gabriel Danyagri, Bianca N. I. Eskelson, Timothy J. Philpott, Sari C. Saunders, Eliot Mompeán, Ignacio Barbeito   +7 more
doaj   +1 more source

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

Seasonal changes of stable isotope signals in the primary feathers of plains sharp‐tailed grouse

Wildlife Society Bulletin, 2023
Stable isotopes of a consumer organism can be used to estimate the proportional utilization of food items that have different isotopic signals to estimate changes in diet over time.
Sejer D. Meyhoff, Daniel L. Johnson, Benjamin H. Ellert, Katelyn Lutes   +3 more
doaj   +1 more source

Stable isotopes in diatom silica [PDF]

, 2010
Diatom silica is a form of biogenic opal (SiO2.nH2O, Figure 1) containing oxygen, silicon, carbon and nitrogen isotopes that can be used in lacustrine and marine paleoenvironmental studies.
Leng, Melanie J., Swann, George E.A.
core