Results 21 to 30 of about 950,858 (353)

Small differences in root distributions allow resource niche partitioning

Ecology and Evolution, 2020
Deep roots have long been thought to allow trees to coexist with shallow‐rooted grasses. However, data demonstrating how root distributions affect water uptake and niche partitioning are uncommon.
Andrew Kulmatiski, Karen H. Beard, Martin C. Holdrege, Edmund C. February   +3 more
doaj   +1 more source

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Aharon P., Anthony E. Fallick, Anton B. Kuznetsov, Bowring S.A., Brand U., Brasier M.D., Brasier M.D., Brasier M.D., Burns S.J., Calver C.R., Corsetti F.A., Fairchild I.J., Fairchild I.J., Gao G., Gorokhov I.M., Gorokhov I.M., Gorokhov I.M., Grotzinger J.P., Grotzinger J.P., Hoffman P.F., Igor M. Gorokhov, Kaufman A.J., Kennedy M.J., Kirschvink J.L., Knoll A.H., Knoll A.H., Knoll A.H., Kupecz J.A., Kuznetsov A.B., Kuznetsov A.B., Lambert I.B., Magaritz M., McArthur J.M., McArthur J.M., McCulloch M.T., Melezhik V.A., Morton J.P., Ovchinnikova G.V., Pelechaty S.M., Podkovyrov V.N., Pokrovsky B.G., Pokrovsky B.G., Pokrovsky B.G., Saylor B.Z., Semikhatov M.A., Singh U., Smith L.H., Tronnes R.G., Tucker M.E., Tucker M.E., Veizer J., Veizer J., Victor A. Melezhik, Wada S.-I., Walter M.R., Wang Da-Rui   +55 more
core   +1 more source

Varying cultivation strategies in eastern Tianshan corresponded to growing pastoral lifeways between 1300 BCE and 300 CE

Frontiers in Ecology and Evolution, 2022
This study combines plant stable isotope and archaeobotanical analyses to explore how ancient pastoral communities in varying landscapes of eastern Tianshan managed their barley fields.
Duo Tian, Yufeng Sun, Melissa M. Ritchey, Tongyuan Xi, Meng Ren, Jian Ma, Jianxin Wang, Zhijun Zhao, Zhijun Zhao, Xue Ling, Xinyi Liu   +10 more
doaj   +1 more source

Absolute isotope ratios defining isotope scales used in isotope ratio mass spectrometers and optical isotope instruments [PDF]

Rapid Communications in Mass Spectrometry, 2020
Rationale The isotope delta is calculated from the isotope ratio of a sample and the absolute isotope ratio of the zero reference point defining each stable isotope international scale ( R std ). Therefore,
Grzegorz Skrzypek, Philip J. H. Dunn
openaire   +2 more sources

High-Resolution in vivo Imaging of Xylem-Transported CO2 in Leaves Based on Real-Time 11C-Tracing

Frontiers in Forests and Global Change, 2019
Plant studies using the short-lived isotope 11C to label photosynthate via atmospheric carbon dioxide (CO2), have greatly advanced our knowledge about the allocation of recent photosynthate from leaves to sinks.
Michiel Hubeau, Michael R. Thorpe, Jens Mincke, Jens Mincke, Jasper Bloemen, Ingvar Bauweraerts, Peter E. H. Minchin, Veerle De Schepper, Filip De Vos, Christian Vanhove, Stefaan Vandenberghe, Kathy Steppe   +11 more
doaj   +1 more source

Contrasting Centennial‐Scale Climate Variability in High Mountain Asia Revealed by a Tree‐Ring Oxygen Isotope Record From Lahaul‐Spiti

Geophysical Research Letters, 2020
Glacier response analyses in High Mountain Asia have revealed that the glaciers from the Karakoram region were in balance or thickening while most from the other regions were thinning, the “Karakoram anomaly.” It is, however, not clear whether this ...
Shreyas Managave, P. Shimla, Ram R. Yadav, R. Ramesh, S. Balakrishnan   +4 more
doaj   +1 more source

Inhibition of cardiac PERK signaling promotes peripartum cardiac dysfunction

Scientific Reports, 2021
Peripartum cardiomyopathy (PPCM) is a life-threatening heart failure occurring in the peripartum period. Although mal-angiogenesis, induced by the 16-kDa N-terminal prolactin fragment (16 K PRL), is involved in the pathogenesis, the effect of full-length
Takashi Shimizu, Akashi Taguchi, Yoshiki Higashijima, Yasuharu Kanki, Ryo Nakaki, Yoshihiro Urade, Youichiro Wada   +6 more
doaj   +1 more source

Geochemical characteristics of hydrogen, oxygen, carbon isotopes and REE of cenozoic dolomites in Well Xike 1, Xisha Islands, South China sea and the significance for dolomitization in island-reef areas

Frontiers in Earth Science, 2023
Due to the special tectonic background and complex geological evolution characteristics of the South China Sea, reef dolomite reservoirs (sush as Well Xike 1) are widely developed.
Xiaoyu Li, Xiaoyu Li, Zhiqiang Shi, Lu Han, Xiaolong Hu   +4 more
doaj   +1 more source

Intensive rainfall recharges tropical groundwaters

Environmental Research Letters, 2015
Dependence upon groundwater to meet rising agricultural and domestic water needs is expected to increase substantially across the tropics where, by 2050, over half of the world’s population is projected to live.
Scott Jasechko, Richard G Taylor
doaj   +1 more source

Nitrogen fixation sensitivity related to water use efficiency at reproductive development in soybean

Plant, Soil and Environment, 2020
Soybean [Glycine max (L.) Merr.] nitrogen fixation is sensitive differentially to drought among different genotypes at different growth and development stages, which directly affects soybean yield. Acetylene reduction activity (ARA) response to a gradual
Yan Jiang, C. Andy King, Larry C. Purcell, Shaodong Wang   +3 more
doaj   +1 more source