Doris Barboni

Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement, Palaeoenvironment, CNRS Research Scientist

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Address: France

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Noel B. Salazar

KU Leuven

Dorian Q Fuller

University College London

Hemin Koyi

Uppsala University

Armando Marques-Guedes

UNL - New University of Lisbon

Enrico Cirelli

Università di Bologna

Gwen Robbins Schug

University of North Carolina at Greensboro

Gabriel Gutierrez-Alonso

University of Salamanca

Yannis Hamilakis

Brown University

Jesper Hoffmeyer

University of Copenhagen

Simon Springer

The University of Newcastle

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Papers by Doris Barboni

A modern pollen− climate database as a tool for quantitative climate and vegetation reconstructions

Sciences De l&#39;Environnement.

Reviewers who served JVS in 2007

Journal of Vegetation Science, 2008

Signal pollinique et climat de mousson en Inde du Sud

Pollen grains of South Indian trees. A user-friendly multimedia identification software, G. Vasanthy, P. Grard, G. Jayapalan (Eds.), 2007, CD-ROM, French Institute of Pondicherry, Library PB 33, Pondicherry-605 001, India (library@ ifpindia. org). Price: Rs 300 (€ 11)

Plant functional types, plant traits and climate reconstructiond in Europe: what works the best?

Ecological and climatological reconstruction from pollen data for the last 15000 years: an application of a new probabilistic method based on plant attributes

An extended probabilistic approach of pant vital attributes: an application to 0 ka and 6 ka data from the European Pollen Database

Relationship between plant traits and climate: an analysis based on pollen data from the Circum-Mediterranean region

Phytoliths occurrences in East African grass species: new investigations of the relations between grass silica short cells, taxonomy, and habitats

High resolution records of rainfall changes over Papua New Guinea throughout the last 2000 years

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Testing the paleobotanical evidences for spring-associated woodlands and wetlands at Laetoli, Olduvai, and Peninj Plio-Pleistocene sites (Northern Tanzania)

Wetland plant waxes from Olduvai Gorge, Tanzania

Reconstructing paleo-environments at East African hominid sites: methods and results from pollen, phytoliths, and isotopes

Pollen data as climate proxies

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Erratum to: The European Modern Pollen Database (EMPD) project

Vegetation History and Archaeobotany, 2013

Controls of DSi in streams and reservoirs along the Kaveri River, South India

Science of The Total Environment, 2015

We report on DSi, ASi, TDS and TSM along the Kaveri River during 2006 and 2007 • The major compos... more We report on DSi, ASi, TDS and TSM along the Kaveri River during 2006 and 2007 • The major composition of the river has not changed during the last 30 years • DSi is controlled by weathering and may be affected by the "artificial lake effect" • Si accumulated in crops (i.e. rice) should be affected by Si inputs from irrigation a b s t r a c t There is an increasing body of evidence showing that land use may affect the concentration and flux of dissolved silica (DSi) and amorphous, biogenic Si particles (ASi/BSi) in surface waters. Here, we present a study of riverine waters collected within the Kaveri River Basin, which has a long history of land occupation with +43% population increase in the watershed during the last 30 years associated with agricultural practices including canal irrigation from reservoirs and, more recently, bore well pumping. We report total dissolved solids (TDS) and suspended material (TSM) for 15 river stations and 5 reservoirs along the Kaveri itself and its main tributaries sampled during pre-monsoon, monsoon and post-monsoon periods in 2006 and 2007. The TDS in the Kaveri River globally increases from the upper reaches (humid to sub-humid climate) to the lower reaches (semi-arid climate), and at a given station from monsoon (M) to hot season (HS). The DSi concentrations range from 129 μmol L −1 (M) to 390 μmol L −1 (HS) in the main Kaveri stream and reaches up to 686 μmol L −1 in the Shimsha River (HS). Our results indicate that DSi and the main solutes of the Kaveri River have not drastically changed since the last 30 years despite the population increase. The pollution index of ranges from 13% to 54% but DSi does not seem to be affected by domestic wastewater. ASi is mostly composed of diatoms and phytoliths that both play roles in controlling DSi. We suggest that DSi and ASi delivered to the cultivated areas through irrigation from reservoir may have two important consequences: increasing Si bioavailability for crops and limiting Si flux to the ocean.

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Geo-archaeological and geometrically corrected reconstruction of the 1.84 Ma FLK Zinj paleolandscape at Olduvai Gorge, Tanzania

Quaternary International, 2014

Article history: Available online xxx a b s t r a c t A geomorphological, sedimentological, strat... more Article history: Available online xxx a b s t r a c t A geomorphological, sedimentological, stratigraphic, and geometric study of 30 trenches excavated around FLK Zinj (Bed I, Olduvai Gorge) has enabled the partial reconstruction of the paleolandscape surrounding this site for a radius of w1000 m. This is the largest sample of geological and archaeological information yet available to reconstruct the topography, ecology, and geomorphology of the Zinj paleosurface and the hominin activities preserved within it. Contrary to previous interpretations, which place FLK Zinj on an isolated and narrow peninsula, it appears that the site was located on the edge of an elevated platform traceable for hundreds of meters. Hominins created FLK Zinj (and other sites, such as the recently discovered PTK and AMK) within the wooded habitats of this platform rather than the more open and grassy environments situated on lower portions of the lacustrine floodplain. Input areas, probably in the form of alluvial fans, existed to the south, following a North-South direction. These input areas are partially responsible for changes in the type sequence. Restricted erosion documented on the wooded platform was mostly caused by runoff processes. An archaeological study of the excavated trenches reveals a sharp contrast in fossil and stone tool density between FLK Zinj and the surrounding landscape, further supporting the contention that the site may have acted as a "central place" where repeated carcass transport, butchery, and consumption took place. Taphonomic studies indicate that at this stage of human evolution, hominins had primary access to carcasses and were not dependent on other carnivores for obtaining meat.

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Vegetation of Northern Tanzania during the Plio-Pleistocene: A synthesis of the paleobotanical evidences from Laetoli, Olduvai, and Peninj hominin sites

Quaternary International, 2014

Available online xxx a b s t r a c t More than 40 years of scientific investigations of the homin... more Available online xxx a b s t r a c t More than 40 years of scientific investigations of the hominin bearing Plio-Pleistocene sediments of northern Tanzania have provided a number of paleobotanical data, which, taken as a whole, provide today a way to investigate vegetation changes between 4 and 1 Ma, at a time when our early ancestors emerged. Here, I have integrated the data from all vegetation proxies obtained for the paleontological sites of Laetoli, Olduvai, and Peninj (i.e. macroscopic plant remains, pollen and phytolith assemblages, carbon and oxygen isotopic ratios measured on carbonates, and organic biomarkers). This important, yet discontinuous botanical record suggests some similarities between past and present-day vegetation at the regional scale: Afromontane forests with Olea, Podocarpus, Juniperus, Hagenia abyssinica in the highlands, and wooded grasslands with grasses and drought-adapted Acacia, Commiphora, Capparidaceae, and Chenopodiaceae and/or Amaranthaceae in the lowlands were present in the southern SerengetieCrater Highlands region since 4 Ma. Grasses of the C 4 photosynthetic type made their first appearance in the record at w3.7 Ma, i.e. during the mid-Pliocene, w700 ky before major pCO 2 and temperature decline. C 4 grasses became dominant in the vegetation soon after (w3.66 Ma), probably in response to reduced precipitation. At w2.6 Ma, phytolith and isotope indicate grassland with abundant C 4 xerophytic grasses that document strong aridity during the Intensification of Northern Hemisphere Glaciation period (w2.7e2.5 Ma). After 2 Ma, the detailed and diverse record at Olduvai indicates complex vegetation patterns linked to oscillating precipitation, varying lake levels, and the presence of geological faults. Hence, despite low (basin-averaged) reconstructed paleo-precipitation amounts of w250e700 mm/y, C 4 -grasslands, closed woodlands, wetlands, and palm-groves co-occurred on short spatial scales near saline Lake Olduvai. Freshwater wetlands and palm-rich woodlands occurred in highly localized areas on the lake margins, where aquifer barriers and/or outcrops caused by geologic faults allowed groundwater discharge. Botanical evidence of paleo-springs at Laetoli, Olduvai, and Peninj includes the marked presence of Typha (cattail) and Hyphaene (palm tree) in association with Acacia pollen grains, and (at Olduvai) abundant forest indicator phytoliths and organic and isotopic biomarkers. At Olduvai, freshwater wetlands were most developed when lake level and fluvial competence where low, i.e. during dry periods. When wetedry climate variability was extreme in East Africa (w1.9e1.7 Ma), freshwater springs may therefore have offered a sustainable habitat (i.e. refuge) for several species, including hominins, and favored hominin and artifact concentration at these specific places, particularly during environmentally stressful times.

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Autochthony and orientation patterns in Olduvai Bed I: a re-examination of the status of post-depositional biasing of archaeological assemblages from FLK North (FLKN)

Journal of Archaeological Science, 2012

Recent excavations at FLK North (Olduvai Gorge, Tanzania) have produced new information on the or... more Recent excavations at FLK North (Olduvai Gorge, Tanzania) have produced new information on the orientation of archaeological materials at various levels of the site. This information includes the uniform distribution of material azimuths, which contrasts with previous inferences of highly patterned orientations of materials in the Bed I archaeological sites. Those previous inferences of patterned material orientations are based on Mary Leakey's 50-year-old drawings of artifact and fossil bone distribution, but are not verified by our precise measurements of archaeological objects made in situ. Nor do those previous results agree with the general lack of geological, geomorphological, and/or taphonomic data that would indicate significant post-depositional movement of archaeological materials in the sites. We argue here that Leakey's drawings are incomplete (only portions of each assemblage were drawn) and inaccurate in their representation of the original locations, shapes and orientations of most archaeological specimens. This argument is supported by several important mismatches in object representations between a photograph taken of a small portion of the FLK 22 Zinjanthropus site floor before the removal of the archaeological items, and the sketch of the same area drawn by Leakey. Thus, we conclude that primary orientation data of excavations (i.e., direct measurements taken from items) generated prior to object removal are the only valid indicators of the relative isotropy or anisotropy of these important paleoanthropological assemblages.

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