Results 21 to 30 of about 2,400,643 (255)

Controls of H2S, Fe2 +, and Mn2 + on Microbial NO3–-Reducing Processes in Sediments of an Eutrophic Lake

Frontiers in Microbiology, 2020
Understanding the biogeochemical controls on the partitioning between nitrogen (N) removal through denitrification and anaerobic ammonium oxidation (anammox), and N recycling via dissimilatory nitrate (NO3–) reduction to ammonium (DNRA) is crucial for ...
Adeline N. Y. Cojean, Moritz F. Lehmann, Elizabeth K. Robertson, Bo Thamdrup, Jakob Zopfi   +4 more
doaj   +1 more source

Freezing and chemical preservatives alter the stable isotope values of carbon and nitrogen of the Asiatic clam (Corbicula fluminea) [PDF]

, 2010
We tested the impacts of most common sample preservation methods used for aquatic sample materials on the stable isotope ratios of carbon and nitrogen in clams, a typical baseline indicator organism for many aquatic food web studies utilising stable ...
Dorothée Kopp, Aurélia Martino, Santoul, Frédéric, Céréghino, Régis, Frédéric Santoul, Kopp, Dorothée, Régis Céréghino, Syväranta, Jari, Jari Syväranta, Martino, Aurelia   +9 more
core   +1 more source

Nitrite isotope characteristics and associated soil N transformations

Scientific Reports, 2021
Nitrite (NO2 −) is a crucial compound in the N soil cycle. As an intermediate of nearly all N transformations, its isotopic signature may provide precious information on the active pathways and processes.
Dominika Lewicka-Szczebak, Anne Jansen-Willems, Christoph Müller, Jens Dyckmans, Reinhard Well   +4 more
doaj   +1 more source

Delineating origins of cheetah cubs in the illegal wildlife trade: Improvements based on the use of hair δ18O measurements

Frontiers in Ecology and Evolution, 2023
All African felids are listed as vulnerable or endangered according to the IUCN (International Union for Conservation of Nature) Red List of Threatened Species.
Geoff Koehler, Anne Schmidt-Küntzel, Laurie Marker, Keith A. Hobson, Keith A. Hobson   +4 more
doaj   +1 more source

Expanding the Isotopic Toolbox to Track Monarch Butterfly (Danaus plexippus) Origins and Migration: On the Utility of Stable Oxygen Isotope (δ18O) Measurements

Frontiers in Ecology and Evolution, 2019
The measurement of naturally occurring stable hydrogen (δ2H) and carbon (δ13C) isotopes in wings of the eastern North American monarch butterflies (Danaus plexippus) have proven useful to infer natal origins of individuals overwintering in Mexico.
Keith A. Hobson, Keith A. Hobson, Kevin J. Kardynal, Geoff Koehler   +3 more
doaj   +1 more source

Stable isotope values in modern bryozoan carbonate from New Zealand and implications for paleoenvironmental interpretation [PDF]

, 2004
Bryozoan carbonate contains useful geochemical evidence of temperate shelf paleoenvironments. Stable isotope values were determined for 103 modern marine bryozoan skeletons representing 30 species from New Zealand. δ18O values range from -1.4 to 2.8 VPDB,
Nelson, Campbell S., Campbell S. Nelson, Marcus M. Key, Smith, Abigail M., Key, Marcus M., Patterson, William P., Abigail M. Smith, William P. Patterson   +7 more
core   +1 more source

Degradation changes stable carbon isotope depth profiles in palsa peatlands [PDF]

, 2014
Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation.
Leifeld, J., C. Alewell, J. P. Krüger, Alewell, C., Krueger, J. P., J. Leifeld   +5 more
core   +2 more sources

A forensic approach to understanding habitat use from stable isotope analysis of (avian) claw material [PDF]

, 2003
1. The potential of using stable isotope signatures of avian claws in order to infer diet and habitat use was investigated. 2. Highly significant relationships observed between stable carbon and nitrogen isotope ratios (¹³C, &
Bearhop, S., Furness, R. W., Hilton, G.H., Furness, RW, Bearhop, S, Hilton, GM, Votier, S. C.; id_orcid, Waldron, S, Votier, SC, Furness, R.W., Waldron, S., Hilton, G. M.   +11 more
core   +1 more source

Response of Bacterial and Fungal Soil Communities to Chinese Fir (Cunninghamia lanceolate) Long-Term Monoculture Plantations

Frontiers in Microbiology, 2020
Successive rotation and monoculture, as common silvicultural practices, are extensively applied worldwide, particularly in subtropical Chinese fir (Cunninghamia lanceolata) plantations in southern China.
Xian Liu, Yuzhe Wang, Yuhui Liu, Hui Chen, Yalin Hu   +4 more
doaj   +1 more source

Stable isotope analysis provides new information on winter habitat use of declining avian migrants that is relevant to their conservation [PDF]

, 2012
Winter habitat use and the magnitude of migratory connectivity are important parameters when assessing drivers of the marked declines in avian migrants. Such information is unavailable for most species.
Newton, J., Shai Markman, Markman Shai, Newton Jason, John W Mallord, Karl L Evans, Mallord, J.W., Markman, S., Evans Karl L., Evans, K.L., Mallord John W., Jason Newton   +11 more
core   +2 more sources