Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Nathan D. Sheldon"'
Publikováno v:
Life, Vol 14, Iss 1, p 78 (2024)
Leaf stomata facilitate the exchange of water and CO2 during photosynthetic gas exchange. The shape, size, and density of leaf pores have not been constant over geologic time, and each morphological trait has potentially been impacted by changing env
Externí odkaz:
https://doaj.org/article/86c27425ba2c4c75a6b5bd623d08fefc
Autor:
Michael T. Hren, Nathan D. Sheldon
Publikováno v:
The Depositional Record, Vol 6, Iss 1, Pp 4-20 (2020)
Abstract Palaeoclimate data indicate that Earth surface temperatures have remained largely temperate for the past 3.5 Byr despite significantly lower solar luminosity over this time relative to the present day. There is evidence for episodic early an
Externí odkaz:
https://doaj.org/article/332db7d41a254f5e88b93f9168cfe00e
Publikováno v:
PeerJ, Vol 7, p e7378 (2019)
Carbon isotope values of leaves (δ13Cleaf) from meta-analyses and growth chamber studies of C3 plants have been used to propose generalized relationships between δ13Cleaf and climate variables such as mean annual precipitation (MAP), atmospheric co
Externí odkaz:
https://doaj.org/article/5dc0cd11066749f4a751e8b7b65dae0b
Autor:
Rebecca M. Dzombak, Nathan D. Sheldon
Publikováno v:
Soil Systems, Vol 4, Iss 4, p 73 (2020)
Phosphorus (P) is an essential limiting nutrient in marine and terrestrial ecosystems. Understanding the natural and anthropogenic influence on P concentration in soils is critical for predicting how its distribution in soils may shift as climate cha
Externí odkaz:
https://doaj.org/article/9b796cf618f1475bb7f6d85845c3c035
Autor:
Nathan D. Sheldon
Publikováno v:
Geofluids, Vol 2018 (2018)
Stable isotope compositions of pedogenic carbonates (δ13Ccarb, δ18Ocarb) are widely used in paleoenvironmental and paleoaltimetry studies. At the same time, both in vertical stratigraphic sections and in horizontal transects of single paleosols, si
Externí odkaz:
https://doaj.org/article/71ce171551114510a62f6ca558299591
Autor:
Rebecca M. Dzombak, Nathan D. Sheldon
Publikováno v:
Gondwana Research. 109:376-393
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8bab73706af6fc7f58112efa26d75f9
https://doi.org/10.1016/j.gr.2022.05.009
https://doi.org/10.1016/j.gr.2022.05.009
Autor:
Francisco Hevia-Cruz, Anthony Hildenbrand, Nathan D. Sheldon, François Chabaux, Fernando O. Marques, Julie Carlut, Vittorio Zanon
Paleosols (PSs) contain valuable information about the climatic conditions under which they formed and constitute an outstanding archive of past weathering processes. Nevertheless, paleosol dating over most of the Quaternary remains challenging. Volc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::296c80bf2fd2a85f136e23ecd6b6cf82
https://doi.org/10.5194/egusphere-egu23-9064
https://doi.org/10.5194/egusphere-egu23-9064
Autor:
Judith M. Klatt, Nathan D. Sheldon, Lauren E Kinsman-Costello, Sharon L. Grim, M. L. Gomes, Kathryn Rico, Gregory J. Dick, Wiebke Ziebis, David A. Fike, Matthew Medina
Publikováno v:
GEOBIOLOGY
The sedimentary pyrite sulfur isotope (delta S-34) record is an archive of ancient microbial sulfur cycling and environmental conditions. Interpretations of pyrite delta S-34 signatures in sediments deposited in microbial mat ecosystems are based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd2189e674ae43178f891ad9bda120b0
https://doi.org/10.1111/gbi.12466
https://doi.org/10.1111/gbi.12466
Publikováno v:
New Phytologist. 229:2576-2585
(1) Plant carbon isotope discrimination is complex, and could be driven by climate, evolution, and/or edaphic factors. We tested the climate drivers of carbon isotope discrimination in modern and historical plant chemistry, and focus in particular on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9cf5d0cab6aab9c909ab9b09b1f17e8
https://doi.org/10.1111/nph.17030
https://doi.org/10.1111/nph.17030
Publikováno v:
Gondwana Research. 85:19-31
Large igneous provinces (LIPs) have been temporally correlated to mass extinctions throughout the Phanerozoic, including the emplacement of the Deccan Volcanic Province (DVP; 66.3–65.6 Ma) in western and central India, which has been invoked as eit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a0095e5be72e5da5bc1dae188083cb6
https://doi.org/10.1016/j.gr.2020.04.007
https://doi.org/10.1016/j.gr.2020.04.007