Jacob Jeremy

Jacob Jeremy
French National Centre for Scientific Research | CNRS · Institut des Sciences de la Terre d'Orléans (ISTO)

PhD

About

166
Publications
14,363
Reads
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1,911
Citations
Introduction
I work on past interactions between climate-human societies and ecosystems through the detection of original organic molecules preserved in lake sediments and their isotopic composition.
Additional affiliations
October 2008 - present
Institut des Sciences de la Terre d'Orleans
Position
  • Resaerch Scientist
October 2008 - present
French National Centre for Scientific Research
Position
  • Researcher
June 2003 - December 2004
National Center for Scientific and Technological Research
Position
  • Pacliva programm - laboratoire des sciences du climat et de l'environnement
Education
September 1999 - February 2003
Université d'Orléans
Field of study
  • Sciences de l'Univers
September 1998 - June 1999
Université de Lille
Field of study
  • Sedimentary Geology, Geophysics and Geochemistry
September 1996 - June 1997
University of Burgundy
Field of study
  • Geology

Publications

Publications (166)
Article
Full-text available
This study investigated the potential of sediments accumulated in sewer systems to record human activities through the occurrence of drug target residues (DTR). The installation studied is 17 m deep underground decantation tank that traps the coarse fractions of a unitary sewer system (northern part of Orléans, France), collecting both stormwater a...
Article
Compound specific hydrogen isotopic analyses have the potential to reveal the biosynthetic pathways of biomarkers and to reconstruct the effects of water stress in a plant, or in an ecosystem. Although C4 graminoids are of great geological interest and are some of the world's leading crops, there are few experimental studies of their biomarker resp...
Article
Full-text available
The Early Eocene experienced a series of short-lived global warming events, known as hyperthermals, associated with negative carbon isotope excursions (CIE). The Paleocene-Eocene Thermal Maximum (PETM or ETM-1) and Eocene Thermal Maximum 2 (ETM-2) are the two main events of this Epoch, both marked by massive sea-floor carbonate dissolution. Their t...
Article
To test the extent to which sediments accumulated in sewers may serve as high-resolution archives of urban evolution, this study examined a sedimentary succession deposited in a decantation tank of the combined sewer network of Orléans (France). The focus was on a 1.43 m sediment core drilled after 10 months of operation since the last cleaning. Se...
Article
Full-text available
This paper presents new radiocarbon dates and the results of the first archaeobotanical investigations at Eneolithic Botai site, for the first time aiming to explore the plant food component in the diet of Botai population and if the inhabitants of the Botai were a part of an early crop food exchange network. Our excavation of a hut circle and asso...
Article
Full-text available
The temporal dynamics of the wastewater influent loads of 25 drug target residues (DTR, both pharmaceuticals and illicit drugs) was assessed during 84 consecutive days. This monitoring scale enables longer temporal patterns than weekday/weekend patterns to be explored. In this study, we focus on day to day variations and the potential statistical c...
Article
The Albian organic-rich successions of the lower part of the Fahdene Formation (Albian to Cenomanian, Tunisia) were studied using sedimentology (analysis of carbonate contents and observation of thin sections), bulk organic geochemistry (Rock-Eval pyrolysis), and molecular biomarker distributions. The selected outcrops cover different structural do...
Poster
Ce travail, effectué dans le cadre du GIS Draix "étude de l'érosion en montagne », s'est intéressé à l’érosion des "terres noires" (marnes jurassiques) du bassin de la Moyenne Durance. Il s’est traduit par une approche multi-compartiments (sols – eaux) – multi analytique (analyses optiques, géochimique), sur les bassins versants expérimentaux de Dr...
Article
Full-text available
The occurrence of 25 drug target residues (illicit drugs or pharmaceutically active compounds) was investigated during 85 consecutive days in the influents of a wastewater treatment plant in the Region Centre-Val de Loire, France. This long tracking period allowed a better understanding of the patterns affecting the occurrence of this type of conta...
Article
This paper presents the potential of 5β-stanols and bile acids to act as fecal source biomarkers in order to identify and characterize past agropastoral activities in archaeological and natural archives. First of all, a molecular inventory of 5β-stanols and bile acids was made on fresh fecal human and domestic animal samples, using the same methodo...
Article
Soils have a substantial role in the environment because they provide several ecosystem services such as food supply or carbon storage. Agricultural practices can modify soil properties and soil evolution processes, hence threatening these services. These modifications are poorly studied, and the resilience/adaptation times of soils to disruptions...
Article
Full-text available
Molecular biomarkers are becoming increasingly important tools in paleoenvironmental research, and over recent years have been shown to be useful indicators of human activities. Common indicators of past human impacts include pollen, charcoal, sedimentation rates, and magnetic susceptibility, each of which has its limitations. Thus, the advent of n...
Article
The Taskomirsay section (South Kazakhstan) is a unique Pliensbachian-Toarcian sequence of lignites, clayey layers and silty-sandstones deposited in a fluvial/lacustrine environment with nearby swampy areas. This period, characterized by a drastic climate change, has been particularly studied in Western Tethyan marine environments, whereas very few...
Article
The hydrogen isotopic composition (δD or (D/H) value) of molecular biomarkers preserved in sedimentary archives is increasingly used to provide clues about the evolution of past climatic conditions. The rationale is that intact biomarkers retain isotopic information related to the climatic conditions that prevailed at the time of their synthesis. S...
Data
Soils have a substantial role in the environment because they provide several ecosystem services such as food supply or carbon storage. Agricultural practices can modify soil properties and soil evolution processes, hence threatening these services. These modifications are poorly studied, and the resilience/adaptation times of soils to disruptions...
Research
Full-text available
En direct des laboratoires de l'institut de Chimie Dans l'intimité isotopique des molécules fossiles: de nouvelles clés pour étudier le climat passé Etudier les variations climatiques passées et leurs impacts sur les écosystèmes est un enjeu clé pour prévoir l'avenir du climat terrestre. On peut trouver la trace de ces variations dans les archives...
Conference Paper
Full-text available
Les milieux de montagne sont particulièrement sensibles au changement climatique, et sont largement étudiés afin de comprendre les fluctuations du climat sur des échelles de temps plus ou moins longues. Ils constituent également des espaces où se mettent en place des activités humaines diverses, qu'il est parfois difficile de qualifier et de quanti...
Conference Paper
Full-text available
La prise de conscience de l’impact des activités humaines sur le système Terre soulève des questions globales sur la durabilité des ressources naturelles et la viabilité de notre habitat pour les populations futures. Elle provoque également des questionnements sur l’ancienneté de cette anthropisation et les modalités de sa progression dans le temps...
Conference Paper
Full-text available
Les sédiments naturels récents ont toujours attisé la curiosité des scientifiques. Les sédiments urbains, témoins privilégiés de notre histoire récente, sont encore méconnus des sédimentologues. Pourtant ces sédiments accumulés dans les réseaux d'assainissement sont une opportunité pour mieux comprendre la dynamique de sédimentation dans ces milieu...
Article
To reconstruct the evolution of livestock in SW Greenland over the last two millennia, we measured the concentration of bile acids in a sedimentary sequence retrieved from Lake Igaliku. Deoxycholic acid (DOC) was the sole bile acid. and was present throughout the sequence. The DOC flux correlated quantitatively with that of coprophilous fungal spo...
Article
Full-text available
The Cap d’Ailly area (Upper Normandy, France) shows several terrestrial-lagoonal sections recording the negative carbon isotope excursion (CIE) associated with the Paleocene-Eocene Thermal Maximum (PETM; 55.8 Ma). A study of the biomarkers and spores/pollen content of the Vasterival section gave complementary information on paleofloral changes that...
Article
The purpose of this study was to show how current vegetation in a peatland is imprinted in the lipid fraction of the underlying soil. La Guette is a fen peatland in Central France dominated by Sphagnum spp. and ericaceous shrubs, colonized by sedges (Molinia caerulea) and trees since the 1970s (Betula pendula and Pinus sylvestris). Lipid were ident...
Conference Paper
L'identification et la quantification des biomarqueurs moléculaires dans les sédiments sont classiquement effectuées suite à leur extraction de la matrice, excluant ainsi toute information sur leur localisation. Si cette pratique permet de reconstituer à des échelles pluri-centimétriques les paléoenvironnements, elle ne peut expliquer la distributi...
Conference Paper
Full-text available
The climatic transition between Eocene and Oligocene (EOT) is marked by the change from a greenhouse to an icehouse climatic mode that affects both the marine and terrestrial realms. Terrestrial ecosystems are more sensitive to climate changes but suffer from the lack of continuous records. Recently, the BRGM retrieved a 340 m-long core from the Re...
Conference Paper
Artic is the most sensitive region to the effects of global warming. Indeed, it warms three times faster than the rest of the world. Nowadays, it is an important issue to characterize the responses of these ecosystems to a rise in temperature and the part that Human plays in this mechanism. For several millennia, agriculture and husbandry are known...
Conference Paper
Les épisodes de réchauffements climatiques, sur les deux derniers millénaires, ont permis deux phases majeures d’expansion agricole au Sud du Groenland. La première, correspond à l’établissement de la civilisation Vikings (986 A.D - milieu du XVème siècle) et la deuxième, au ré-établissement des fermiers européens dès 1920. Cette région apparaît do...
Conference Paper
Les varves, lamines, rythmites, parfois observées dans les sédiments lacustres peuvent résulter de forçages saisonniers, solaires ou orbitaux (Glenn et Kelts, 1991). La sédimentation argileuse Eocène-Oligocène du bassin de Rennes est caractérisée par un faciès laminé dont la signification temporelle reste à déterminer. L'objectif de ce travail est...
Conference Paper
La transition climatique Eocène/Oligocène (E/O) est l'un des changements majeurs au cours du Cénozoïque. Elle se traduit par la mise en place de calottes glaciaires développées et permanentes aux pôles. La majorité des études ayant été réalisée en domaine marin, son impact sur les écosystèmes continentaux reste méconnu. Les dépôts lacustres de l'Eo...
Article
Using sedimentary miliacin (olean-18-en-3β-ol methyl ether) as a molecular tracer of the history of Panicum miliaceum (broomcorn millet) cultivation depends upon broomcorn millet being sedimentary miliacin’s dominant source. It also requires knowledge of the variability in miliacin concentration in broomcorn millet. Finally, it is affected by the p...
Article
Understanding the responses of soil organic carbon to an increase in global temperature is crucial to estimate potential feedbacks on global warming. In such a context, Rock-Eval pyrolysis has been recently proposed as a screening tool to investigate soil organic matter (SOM) chemistry and vulnerability. In order to test the validity of Rock-Eval a...
Article
Full-text available
Hemp (Cannabis sp.) has been a fundamental plant for the development of human societies. Its fibers have long been used for textiles and rope making, which requires prior stem retting. This process is essential for extracting fibers from the stem of the plant, but can adversely affect the quality of surface waters. The history of human activities r...
Article
The domains of the ancient polities D’MT and Aksum in the Horn of Africa’s highlands are a superior natural system for evaluating roles of environmental change on the rise and fall of civilizations. To compare environmental changes of the times of the two polities, we analyzed stable hydrogen isotopic ratios (δD) of land-plant derived fatty acids (...
Article
Full-text available
During the archaeobotanical investigation of Scythian–Sarmatian period (Early Iron Age), pits with crop processing waste, discovered in the floodplain of Donets River, eastern Ukraine, and charred remains of cereal grains, dominated by broomcorn millet, were recorded. The grains from the pits were radiocarbon dated to the fifth to first century BC....
Article
Full-text available
During the archaeobotanical investigation of Scythian–Sarmatian period (Early Iron Age), pits with crop processing waste, discovered in the floodplain of Donets River, eastern Ukraine, and charred remains of cereal grains, dominated by broomcorn millet, were recorded. The grains from the pits were radiocarbon dated to the fifth to first century BC....