Results 41 to 50 of about 26,538 (206)

Analyzing the Reproductive Characteristics of the Naked Carp Gymnocypris Przewalskii (Kessler) Based on the Oxygen Isotopes of Otolith Core Using SHRIMP

Yankuang ceshi, 2023
BACKGROUNDIt is of great significance to study the breeding environment of the naked carp in Qinghai Lake for the conservation and restoration of natural habitat. The naked carp is the only economic species in Qinghai Lake, colloquially called “Huang Yu”,
Ling ZHOU, Linbo QIAN, Sumei ZHAO, Xiulan ZHANG, Yinglie LIU, Qiaoling TANG, Jie YUAN   +6 more
doaj   +1 more source

Local hydroclimate alters interpretation of speleothem δ18O records [PDF]

Oxygen isotopes (δ18O) are the most commonly utilized speleothem proxy and have provided many foundational records of paleoclimate. Thus, understanding processes affecting speleothem δ18O is crucial.
K. R. Johnson, Trần, MX, Ersek, V, V. Ersek, Goldsmith, Gregory R., A. Wolf, Skiba, V, Đinh, TH, V. Skiba, T. H. Đinh, McGee, D., Ersek, V., D. McGee, Griffiths, ML, Patterson, EW, Wolf, A, Johnson, K. R., G. R. Goldsmith, McGee, D, Patterson, E. W., Johnson, KR, Trần, M. X., Bùi, T. N., Bùi, TN, Skiba, V., Q. Đỗ-Trọng, Griffiths, M. L., E. W. Patterson, Wolf, A., Đinh, T. H., M. X. Trần, Đỗ-Trọng, Q, Goldsmith, GR, Đỗ-Trọng, Q., T. N. Bùi, M. L. Griffiths, Do Trong, Quoc, Goldsmith, G. R.   +37 more
core   +1 more source

Asian Summer Monsoon Changes Inferred From a Stalagmite δ18O Record in Central China During the Last Glacial Period

Frontiers in Earth Science, 2022
The reconstruction of Asian summer monsoon (ASM) changes during the last glacial period is of great significance for better understanding monsoon dynamics. The phase relationship between the Indian summer monsoon (ISM) and East Asian summer monsoon (EASM)
Qingmin Chen, Xing Cheng, Xing Cheng, Yanjun Cai, Yanjun Cai, Qianzhou Luo, Junliang Zhang, Li Tang, Yi Hu, Juangang Ren, Peng Wang, Yan Wang, Yu Zhang, Gang Xue, Jie Zhou, Hai Cheng, Hai Cheng, R. Lawrence Edwards, Zenglin Hong, Zenglin Hong, Zenglin Hong   +20 more
doaj   +1 more source

Resolving the biome debate: ecological and palaeo‐data concur that the extensive tree‐limited grassy biomes of central and north‐western Madagascar are largely anthropogenic

Biological Reviews, EarlyView.
ABSTRACT For millennia, human activities have transformed ecosystems globally. Determining which landscapes are predominantly anthropogenic is crucial to conservation and habitat restoration. Madagascar, a critically‐threatened biodiversity hotspot, is a prominent example.
Grant S. Joseph, Sean Hixon, Colleen L. Seymour, Laurie R. Godfrey, Miguel Pedrono, Karen E. Samonds, Andrinajoro R. Rakotoarivelo, Brooke E. Crowley   +7 more
wiley   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Cellulose Oxygen Isotopes of Sphagnum and Vascular Plants in a Peat Core Reveal Climate Change in Northern Japan Over the Past 2,000 Years

Geochemistry, Geophysics, Geosystems, 2021
The cellulose δ18O of plant tissues in peat is a potential climate proxy. However, understanding what is driving the shifts in δ18O of cellulose is required for its application.
Hiromichi Sakurai, Masanobu Yamamoto, Osamu Seki, Takayuki Omori, Tomonori Sato   +4 more
doaj   +1 more source

Eclogitic diamonds from variable crustal protoliths in the northeastern Siberian craton: trace elements and coupled δ13C – δ18O signatures in diamonds and garnet inclusions [PDF]

, 2016
Diamonds of eclogitic assemblages are dominant in the placer diamond deposits of the northeastern Siberian platform. In this study we present new trace elements and stable isotopes (δ13C and δ18O) data for alluvial diamonds and their garnet inclusions ...
Kalinina, Victoria, Ragozin, Alexey, Rubatto, Daniela, Shatsky, V. S, Zedgenizov, Dmitry   +4 more
core   +1 more source

Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil)

, 2021
Here we present a speleothem oxygen isotope (δ18O) and carbon isotope (δ13C) record from Angelica Cave in central Brazil (13.40°S, 46.23°W, ~585 m above sea level). The record is based on three stalagmite samples, AG1, AG2 and AG4.
Wong, Minn Lin, Bayer, Maximiliano, Wang, Xianfeng, Latrubesse, Edgardo M, He, Shaoneng   +4 more
core   +1 more source

Intra‐Plant Nitrogen Isotope Fractionation in Maize

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background and aim The natural abundance of nitrogen isotopes (δ15N) provides a powerful integrative tracer of nitrogen uptake and assimilation in plants, yet the internal partitioning of δ15N among plant tissues remains insufficiently understood.
Priscillia Semaoune, Joëlle Templier, Sylvie Derenne, R. Dave Evans, Mathieu Sebilo   +4 more
wiley   +1 more source

Regional seawater δ18O records and global δ18O seawater-stack over the mid-Pleistocene transition

, 2019
High-resolution seawater δ18O records, derived from coupled benthic foraminifera Mg/Ca and δ18O analyses, can be used to evaluate how global ice volume changed during the Mid-Pleistocene Transition (MPT, ~1250-600 ka ago).
Ford, Heather L, Raymo, Maureen E
core   +1 more source