Stable carbon (δ13C) and oxygen (δ18O) isotope measurements in lacustrine ostracodes are widely used as paleolimnological indicators of past climate change. Previous work has individual ostracode valves to resolve seasonal subdecadal paleohydrological signals, yet replicated assessments co-occurring specimens from modern samples rare. Here we focus on sediments collected 1979 Lake Turkana, an a...

Formalin preservation affects the stable isotope composition of zooplankton samples, thus limiting analysis valuable collections covering large time intervals. Here, we compare different procedures for correcting bias caused by formalin in δ13C and δ15N community samples. Zooplankton samples representative seasonal variations period 2000–2009 were collected off A Coruña (NW Spain). Part sample ...

δ13C records from the mid-depth Atlantic show a pronounced decrease during Heinrich Stadial 1 (HS1), deglacial episode of dramatically weakened Meridional Ocean Circulation (AMOC). Proposed explanations for this include greater fraction δ13C-depleted southern sourced water (SSW), in North Deep Water (NADW) end-member, and accumulation respired organic carbon. However, relative importance these ...

Pure and natural essential oils of Allium species are primarily used in the food industry, but due to their low yield, production quantities can be difficult achieve thus highly expensive. Due these problems, adulterations a reality this field. The purpose research is develop multi element stable isotope analysis methodology for authentication leek, onion, shallot, chive. Naturalness was achiev...

Volatiles transported from the Earth’s interior to surface through permeable faults provide insights on gas composition of deep reservoirs, mixing and migration processes, can also be applied as gas-geothermometer. Here, we present carbon (δ13C), hydrogen (δ2H) nitrogen (δ15N) isotopic data CO2, CH4, N2 samples collected Kızıldere Tekke Hamam geothermal fields, located along eastern segment Büy...

Grass-based milk production is a major contributor to Irish agricultural output. The study characterized the pool using stable isotope ratio analysis of carbon, nitrogen, oxygen and sulphur. Authentic raw samples were collected from 50 farms on five occasions over 13 months. Mean values −27.11, 6.79, −3.27 6.16‰ obtained for δ13C, δ15N, δ18O δ34S, respectively. δ13C reflected high level grass i...

The biomass dynamics of primary producers have important implications for the structure and function of ecosystems. Along the wave-swept coastline of central California, USA, biomass removal by wave action is a key driver in the primary productivity of giant kelp forests, yet the mechanisms of regrowth within giant kelp Macrocystis pyrifera are not well understood. To examine the physiological ...