Penelope Gonzalez Samperiz

Penelope Gonzalez Samperiz
Spanish National Research Council | CSIC · Department of Geoenvironmental Processes

PhD

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178
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Publications

Publications (178)
Article
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The Iberian Peninsula is located at the intersection between the subtropical and temperate climate zones and the paleoclimate records from this region are key to elucidate the varying humidity and changing dominance of atmospheric circulation patterns in the Mediterranean-North African region in the past. Here we present a quantitative hydroclimate...
Article
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Climatic refugia have often been associated with hotspots of richness and endemism, and identified on the basis of molecular or paleobotanical information. Here, we apply a phylogenetic analysis to 18,000 plant communities distributed across the Pyrenees, a south European mountain range, to identify climatic refugia from imprints of relictuality in...
Preprint
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The Iberian Peninsula is characterised by a steep west-east moisture gradient today, reflecting the dominance of maritime influences along the Atlantic coast and more Mediterranean-type climate further east. Holocene pollen records from the Peninsula suggest that this gradient was less steep during the early to mid-Holocene, possibly reflecting the...
Article
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This article aims to delve into the reality of glacial refuges of forests and tree species (including conifers, mesothermophilous angiosperms and xerothermic scrub) during the cold dry phases of the Iberian Pleistocene in which there is evidence of occupation of Middle Palaeolithic people. The research framework focuses on the eastern sector of the...
Article
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El desarrollo de edificios tobáceos de origen fluvial se asocia a menudo con fases cálidas y húmedas cuaternarias y son comúnmente empleados como indicadores climáticos. En el presente trabajo se estudia el depósito tobáceo fluvial Holoceno del Nogal de El Batán, situado en el valle del río Las Parras (Cordillera Ibérica, NE España), bajo una persp...
Article
The Doñana area in southern Iberia is one of the most renowned protected areas of Europe, mostly due to the diversity and value of its wetland ecosystems. The large biogeographical significance of this territory and the outstanding availability of sedimentary archives have made this region a hotspot of paleobotanical research in the Iberian Peninsu...
Article
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Mountain glaciers have generally experienced an accelerated retreat over the last 3 decades as a rapid response to current global warming. However, the response to previous warm periods in the Holocene is not well-described for glaciers of the southern Europe mountain ranges, such as the Pyrenees. The situation during the Medieval Climate Anomaly (...
Article
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The El Cañizar de Villarquemado pollen record covers the last part of MIS 6 to the Late Holocene. We use Tolerance-Weighted Averaging Partial Least Squares (TWA-PLS) to reconstruct mean temperature of the coldest month (MTCO) and growing degree days above 0°C (GDD 0 ) and the ratio of annual precipitation to annual potential evapotranspiration (MI)...
Chapter
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La presencia inicial de los humanos en la alta montaña desde hace poco menos de 8000 años presenta más ele-mentos de domesticación de lo que inicialmente se había estimado. raciones arqueológicas es todavía limitada, hay evidencias de uso de ganado doméstico y, en algunos casos, una probable agricultura utilizando mezcla de cereales a cotas interme...
Article
A key problem in explaining the mountain landscapes of the Mediterranean region is the relationship between the development of transhumance (seasonal movement of livestock over long distances) and deforestation of the subalpine and upper montane belts at 1350–2200 m above sea level (m a.s.l.). We examined this relationship in the Central Southern P...
Article
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Few continental palaeoenvironmental sedimentary sequences from Southern Europe are long enough to span the last interglacial period (Marine Isotopic Stage-MIS 5), the last glacial cycle (MIS 4 to 2) and the Holocene. El Cañizar de Villarquemado (North-Eastern Iberian Peninsula) is an exceptional sedimentary lacustrine sequence spanning the last ca....
Article
We have analyzed potential harmful trace elements (PHTE; Pb, Hg, Zn, As and Cu) on sediment cores retrieved from lake Marboré (LM) (2612 m a.s.l, 42°41′N; 0° 2′E). PHTE variability allowed us to reconstruct the timing and magnitude of trace metal pollutants fluxes over the last 3000 years in the Central Pyrenees. A statistical treatment of the data...
Preprint
Full-text available
Mountain glaciers have generally experienced an accelerated retreat over the last three decades as a rapid response to current global warming. However, the response to previous warm periods in the Holocene is not well-described for glaciers of the of southern Europe mountain ranges, such as the Pyrenees. The situation during the Medieval Climate An...
Article
This paper reviews the past distribution of Aleppo pine woodlands in the Ebro Basin, Northeastern Iberia, from the Mesolithic to Modern times based on wood charcoal data. The aim is to detail the chronological timing and the drivers explaining the long-term presence of Aleppo pine woodlands and associated thermophilous flora. The available charcoal...
Conference Paper
Full-text available
Vegetation reconstruction associated to Holocene fluvial tufa build-ups of the Iberian Range): Fluvial tufa build-ups located in the Queiles, Val and Las Parras del Martín river valleys (Iberian Range, NE Iberia), are investigated following radiocarbon dating, palynological and anthracological analyses. The studied tufa deposits have been framed wi...
Article
We present a multidisciplinary dating approach - including radiocarbon, Uranium/Thorium series (U/Th), paleomagnetism, single-grain optically stimulated luminescence (OSL), polymineral fine-grain infrared stimulated luminescence (IRSL) and tephrochronology - used for the development of an age model for the Cañizar de Villarquemado sequence (VIL) fo...
Article
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Fire regime changes are considered a major threat to future biodiversity in the Mediterranean Basin. Such predictions remain uncertain, given that fire regime changes and their ecological impacts occur over timescales that are too long for direct observation. Here we analyse centennial- and millennialscale shifts in fire regimes and compositional t...
Article
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The El Cañizar de Villarquemado sequence provides a palaeoenvironmental record from the western Mediterranean Basin spanning the interval from the last part of MIS6 to the late Holocene. The pollen and sedimentological records provide qualitative information about changes in temperature seasonality and moisture conditions. We use Weighted Averaging...
Article
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The Anthropocene is related to the origin of current landscape configuration, and in terms of vegetation, with the consideration of human action as main forcing of clear, intense and permanent changes through time. In this paper we compile and compare data from palynological sequences, microcharcoal records, archaeological sites and radiocarbon dat...
Article
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Tree lines are supposed to react sensitively to the current global change. However, the lack of a long-term (millennial) perspective on tree line shifts in the Pyrenees prevents understanding the underlying ecosystem dynamics and processes. We combine multiproxy palaeoecological analyses (fossil pollen, spores, conifer stomata, plant macrofossils,...
Article
We present the first Holocene chironomid-based summer temperature reconstruction for the Iberian Peninsula. A sequence from the shallow mountain lake Basa de la Mora (1914 m a.s.l., Central Pyrenees) was analysed and the reconstruction was performed by means of a merged Norwegian–Swiss chironomid calibration dataset. The presence of a multiproxy st...
Chapter
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RESUMEN En el proyecto CLAM2 se han estudiado las comunidades biológicas actuales y subfósiles de los lagos de Enol y Marboré, así como las secuencias palinológicas y lluvia polínica de ambos sistemas para poder obtener indicadores fiables de cambio global en escalas temporales largas. Los resultados muestran que el lago Enol tiene unos valores de...
Article
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This paper presents a new Holocene palaeoecological record from coastal south-eastern Spain, a region characterised by high plant species diversity, varied physiography, high risk of desertification, and a history of human pressure on the landscape that stretches to antiquity. The pollen sequence shows four main vegetation phases: the first charact...
Article
Abstract Environmental fluctuations during the Holocene caused important landscape changes in the Central Ebro Basin, which is a very sensitive region due to its semiarid climate, lithology, and continuous human presence. Severe erosion processes hinder palaeoenvironmental and archaeological record preservation. Infills of ephemeral stream valleys...
Article
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Sedimentological, geochemical and magnetic data in a ~ 7-m sequence from Marboré Lake (2612 m asl, central Pyrenees) provide information about environmental variability since the last glacier retreat (14.6 cal ka BP) in high-altitude Pyrenean environments. The sediment sequence is composed of millimeter- to centimeter-thick rhythmites made of finer...
Article
Abstract Comparison of selected, well-dated, lacustrine, speleothem and terrestrial pollen records spanning the Holocene onset and the Early Holocene (ca. 11.7–8 cal kyrs BP) in the Iberian Peninsula shows large hydrological fluctuations and landscape changes with a complex regional pattern in timing and intensity. Marine pollen records from Albora...
Article
The southern European Doñana wetlands host a highly biodiverse landscape mosaic of complex transitional ecosystems. It is one of the largest protected natural sites in Europe, nowadays endangered by intensive agricultural practices, and more recently tourism and human-induced fires. Its present-day spatial heterogeneity has been deeply investigated...
Article
The Ebro Basin constitutes one of the most representative territories in SW Europe for the study of prehistoric societies during the Pleistocene-Holocene transition. The correlation of palaeoenvironmental and geomorphological proxies obtained from sedimentary records with chronologically well-constrained reference archaeological sites has allowed d...
Article
This paper presents the environmental, climate and vegetation changes reconstructed for the last 14.6 kyr cal BP from the Marbor? Lake sedimentary sequence, the highest altitude record (2612 m a.s.l.) in the Pyrenees studied up to date. We investigate the sensitivity of this high altitude site to vegetational and climate dynamics and altitudinal sh...
Conference Paper
Evolution of the Conquezuela palaeolake, located in the eastern margin of the Iberian Peninsula Northern Plateau, has been investigated using multiproxy analyses (sedimentology, XRF geochemistry, palynology) and with a chronological control based on optically stimulated luminescence (OSL) and AMS techniques. The 10 m-thick sedimentary sequence show...
Conference Paper
Full-text available
High-resolution, multi-proxy lake records from Iberian Mediterranean mountains with robust chronologies have allowed the identification of centennial to decadal scale paleohydrological fluctuations during the last 2000 years within the Iberian Peninsula. The dataset illustrates sharp regional gradients and timing differences when compared to climat...
Article
Full-text available
Fluvial tufa located in the Queiles and Val river valleys (Moncayo Natural Park, Iberian Range, NE Iberia), are investigated following morphostratigraphic descriptions, radiocarbon dating and palynological and anthracological analyses. The studied tufa deposits have been chronologically framed within the Early-Mid Holocene (ca. 9500 to 4000 cal yr...
Chapter
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This paper summarizes the preliminary results derived from the OAPN project Vegetation resilience and vulnerability in two highly diverse Iberian enclaves: Doñana and Sierra Nevada (261/2011 OAPN). Far from being randomly chosen, these contrasting geographical settings were selected due to their potential to serve as models for the study of vegetat...
Article
16 Pags. This article as a Preface by the Editors belonging to a special issue of Catena titled "Geoecology in Mediterranean mountain areas. Tribute to Professor Jose Maria Garcia Ruiz". The definitive version is available at: http://www.sciencedirect.com/science/journal/03418162
Article
Abstract In this contribution we compile and summarize the available paleo-environmental lacustrine data for the last 20,000 years from the southern Central Pyrenees (from west to east: El Portalet, Tramacastilla, Basa de la Mora, Estanya, Redon, Montcortès and Marcelino lakes) and present a new sequence from mid altitude (Holocene record of Lake E...
Article
Channel changes are the consequence of changes in sediment yield from the slopes and in the connectivity between slopes and channels because of distinct land use and climate impacts. In this study we investigated the characteristics and evolution of a short reach in the headwater of the Ijuez River, central–southern Pyrenees. Assessment of a series...
Article
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El Dryas Reciente ( Younger Dryas ) (GS-1, entre 12,9 y 11,7 ka BP) se caracterizo por un marcado descenso de la temperatura a escala global. La consecuencia fue un re avance de los glaciares que afecto tambien a las cordilleras mas importantes de la Peninsula Iberica. Este trabajo revisa la informacion disponible sobre la localizacion, evolucion y...
Article
Land degradation and soil erosion are key environmental problems in Mediterranean mountains characterized by both a long history of human occupation, and strong seasonality of hydrological regimes. Experimental monitored catchments have identified main controlling factors on erosion dynamics, but because of the short time span of the instrumental m...
Article
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The Ordesa and Monte Perdido National Park and the Pyrenean Institute of Ecology (CSIC) recently joined the Spanish LTER network. As part of our strategy to understand recent changes in this protected area, we are carrying out a number of projects to evaluate changes at different spatiotemporal scales, using a variety of methods and approaches. We...
Article
We review the evolution of glaciers in the Iberian Mountains during the Younger Dryas (12.9–11.7 ka, following the chronology of Greenland Stadial 1 – GS1) and compare with available environmental and climate data to investigate glacier dynamics during cold stadial episodes. The best examples of Younger Dryas moraines are found in the Central Pyren...
Presentation
The Ebro Basin constitutes one of the most representative territories in SW Europe for the study of prehistoric societies during the Pleistocene-Holocene transition. The correlation of palaeoenvironmental and geomorphological proxies obtained from sedimentary records with chronologically well-constrained reference archaeological sites has allowed d...
Article
The conversion of subalpine forests into grasslands for pastoral use is a well-known phenomenon, although for most mountain areas the timing of deforestation has not been determined. The presence of charcoal fragments in soil profiles affected by shallow landsliding enabled us to date the occurrence of fires and the periods of conversion of subalpi...
Article
Full-text available
Los espacios protegidos, por el hecho de albergar una gran geo-biodiversidad y asegurar una baja intervención humana, constituyen lugares muy adecuados para el seguimiento de organismos y procesos a escala ecológica, así como para la obtención de series temporales largas a escala geológica. En el marco de la red LTER-España, el Parque Nacional de O...
Article
Full-text available
We review the effects of climate variability and land use / land cover changes in the Central Spanish Pyrenees at different spatial and temporal scales. Paleoclimatic studies based upon multi-proxy analyses of lacustrine, glacial and speleothematic deposits, among others, have demonstrated the occurrence of intense climatic fluctuations not only du...
Conference Paper
Full-text available
Tufa deposits have proved to be excellent palaeobotanical archives. Commonly, some facies include charcoal remains and detailed leaf imprints constituting extraordinary proxies to develop biogeographic and biostratigraphic aspects (Ollivier et al., 2010; Dabkowski, 2014). By contrast, palynology applied to tufa settings has been poorly developed as...
Article
Full-text available
The sedimentological, geochemical and palynological analyses performed in the Conquezuela palaeolake (41°11′ N; 2°33′W; 1124 m a.s.l.) provide a detailed, multiproxy palaeoenvironmental reconstruction in one of the key areas of inner Iberian Neolithic colonization. Combined with archaeobotanical and archaeological data from well-dated settlements a...