Simpson, Emily M. B. Crowley, Brooke E. Sturmer, Daniel M.
Published in
Frontiers in Environmental Archaeology
Isotopic analysis is destructive and requires that a specimen retains its original (biogenic) chemical composition. A specimen's relative abundance of calcium and phosphorous (Ca/P) or carbonate and phosphate (CO3/PO4) is often used to assess preservation. If a specimen's Ca/P or CO3/PO4 is similar to modern specimens, a specimen's isotopic composi...
Willeit, Matteo Ilyina, Tatiana Liu, Bo Heinze, Christoph Perrette, Mahé Heinemann, Malte Dalmonech, Daniela Brovkin, Victor Munhoven, Guy Börker, Janine
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The carbon cycle component of the newly developed Earth System Model of intermediate complexity CLIMBER-X is presented. The model represents the cycling of carbon through atmosphere, vegetation, soils, seawater and marine sediments. Exchanges of carbon with geological reservoirs occur through sediment burial, rock weathering and volcanic degassing....
Guédron, Stéphane Delaere, Christophe Fritz, Sherilyn C. Tolu, Julie Sabatier, Pierre Devel, Anne-Lise Heredia, Carlos Vérin, Claire Alves, Eduardo Q. Baker, Paul A.
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Holocene climate in the high tropical Andes was characterized by both gradual and abrupt changes, which disrupted the hydrological cycle and impacted landscapes and societies. High-resolution paleoenvironmental records are essential to contextualize archaeological data and to evaluate the sociopolitical response of ancient societies to environmenta...
DeSantis, Larisa R. G. Feranec, Robert S. Southon, John Cerling, Thure E. Harris, John Binder, Wendy J. Cohen, Joshua E. Farrell, Aisling B. Lindsey, Emily L. Meachen, Julie
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Published in
Frontiers in Ecology and Evolution
Studies of Rancho La Brea predators have yielded disparate dietary interpretations when analyzing bone collagen vs. enamel carbonate—requiring a better understanding of the relationship between stable carbon isotopes in these tissues. Stable carbon isotope spacing between collagen and carbonate (Δca-co) has also been used as a proxy for inferring t...
Faust, Johan C Ascough, Philippa Hilton, Robert G Stevenson, Mark A Hendry, Katharine R März, Christian
Published in
Environmental Research Letters
The protection of organic carbon through association with iron minerals (FeR) is an important factor in its stabilisation, long-term storage, and burial efficiency in marine sediments. However, large uncertainties still exist concerning the sources, lability, age, and composition of the organic matter associated with FeR in natural sediments. There...
Cui, Bowen Wang, Xuming Su, Yuebo Gong, Cheng Zhang, Danhong Ouyang, Zhiyun Wang, Xiaoke
Published in
Frontiers in Plant Science
Trees growing on paved lands endure many environmental stresses in the urban environment. However, the morphological and physiological mechanisms underlying tree adaptation to pavement in the field are less known. In this study, we investigated 40 sites where Ginkgo biloba and Platanus orientalis grow on adjacent pairs of paved and vegetated plots ...
Hu, Yi Guy, Robert D. Soolanayakanahally, Raju Y.
Published in
Frontiers in Plant Science
Nitrogen isotope discrimination (Δ15N) may have utility as an indicator of nitrogen use in plants. A simple Δ15N-based isotope mass balance (IMB) model has been proposed to provide estimates of efflux/influx (E/I) ratios across root plasma membranes, the proportion of inorganic nitrogen assimilation in roots (P root) and translocation of inorganic ...
Eagle, Robert A Guillermic, Maxence De Corte, Illian Alvarez Caraveo, Blanca Bove, Colleen B Misra, Sambuddha Cameron, Louise P Castillo, Karl D Ries, Justin B
It is thought that the active physiological regulation of the chemistry of a parent fluid is an important process in the biomineralization of scleractinian corals. Biological regulation of calcification fluid pH (pHCF) and other carbonate chemistry parameters ([CO32−]CF, DICCF, and ΩCF) may be challenged by CO2 driven acidification and temperature....
García-Arriola, Oscar Agesandro Roy, Priyadarsi D. Vargas-Martínez, Irma Gabriela Giron-García, Ma. Patricia Curtis, Jason H. Israde-Alcantara, Isabel Quiroz-Jimenez, Jesús David
Published in
Frontiers in Ecology and Evolution
Elemental composition of the inorganic fraction, carbon isotopes, and C/N of organic matter from a new radiocarbon-dated sedimentary sequence collected from Lake Coatetelco (960 m asl) extend information about the environmental and hydrological conditions of central Mesoamerica from the earliest Holocene to the interval of first human settlements i...
Yatsuk, Andrey Gresov, Alexander Snyder, Glen Tritch
Published in
Frontiers in Earth Science
The continental margins of the East Siberian Sea and Arctic Ocean are among the Earth’s most inaccessible marine environments for hydrocarbon research due to the almost year-round presence of ice cover. Despite this, limited preliminary assessments which have been carried out to date have all yielded some indication of high oil and gas production p...
