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The SW coast of the Iberian Peninsula experiences a lack of palaeoenvironmental and archaeological data. With the aim to fill this gap, we contribute with a new palynological and geochemical dataset obtained from a sediment core drilled in the continental shelf of the Algarve coast. Archaeological data have been correlated with our multi-proxy dataset to understand how human groups adapted to environmental changes during the Early-Mid Holocene, with special focus on the Mesolithic to Neolithic transition. Vegetation trends indicate warm conditions at the onset of the Holocene followed by increased moisture and forest development ca. 10–7 ka BP, after which woodlands are progressively replaced by heaths. Peaks of aridity were identified at 8.2 and 7. 5 ka BP. Compositional, textural, redox state, and weathering of source area geochemical proxies indicates abrupt palaeoceanographic modifications and gradual terrestrial changes at 8.2 ka BP, while the 7.5 ka BP event mirrors a decrease in land moisture availability. Mesolithic sites are mainly composed of seasonal camps with direct access to the coast for the exploitation of local resources. This pattern extends into the Early Neolithic, when these sites coexist with seasonal and permanent occupations located in inland areas near rivers. Changes in settlement patterns and dietary habits may be influenced by changes in coastal environments caused by the sea-level rise and the impact of the 8.2 and 7.5 ka BP climate events.
Cristina Val-Peón; Juan Santisteban; José López-Sáez; Gerd-Christian Weniger; Klaus Reicherter. Environmental Changes and Cultural Transitions in SW Iberia during the Early-Mid Holocene. Applied Sciences 2021, 11, 3580 .
AMA StyleCristina Val-Peón, Juan Santisteban, José López-Sáez, Gerd-Christian Weniger, Klaus Reicherter. Environmental Changes and Cultural Transitions in SW Iberia during the Early-Mid Holocene. Applied Sciences. 2021; 11 (8):3580.
Chicago/Turabian StyleCristina Val-Peón; Juan Santisteban; José López-Sáez; Gerd-Christian Weniger; Klaus Reicherter. 2021. "Environmental Changes and Cultural Transitions in SW Iberia during the Early-Mid Holocene." Applied Sciences 11, no. 8: 3580.
Old Las Salinas spring in Medina del Campo, Duero river basin, central Spain. Medina del Campo groundwater body (MCGWB) is a multilayer semiconfined aquifer subject to intensive pumping since the 1970’s, where the current existence of spas where there used to be traditional baths could confirm the existence of deep groundwater flow paths. The old spring of Las Salinas (OSLS) is a saline anomaly in an aquifer with predominance of CaCO3H waters whose occurrence has not yet been formally explained. Long-term geological, geophysical, hydrogeological and hydrochemical records were integrated and complemented with field work to clarify its existence. Outcomes led to the conclusion that the hydrochemistry of the Olmedo and Palacio de las Salinas salt baths is associated with the existence of a major threshold in the impervious basement of the aquifer, which intercepted deep regional groundwater flow and caused upwelling to the surface under unperturbed conditions. These results allow for the development of a conceptual flow model at the regional scale that explains the changes in natural water chemistry that have been identified in recent decades.
A. De la Hera-Portillo; J. López-Gutiérrez; C. Marín-Lechado; P. Martínez-Santos; A. Ruíz-Constán; M.M. Corral-Lledó; E. Galindo-Rodríguez; R. Mediavilla; J.I. Santisteban; E. Rodríguez-Jiménez; M.F. Callaú-Lópes. Integrating current and historical water chemistry data with long-term piezometric records to develop a regional-scale conceptual flow model: Las Salinas spring, Medina del Campo, Spain. Journal of Hydrology: Regional Studies 2021, 34, 100781 .
AMA StyleA. De la Hera-Portillo, J. López-Gutiérrez, C. Marín-Lechado, P. Martínez-Santos, A. Ruíz-Constán, M.M. Corral-Lledó, E. Galindo-Rodríguez, R. Mediavilla, J.I. Santisteban, E. Rodríguez-Jiménez, M.F. Callaú-Lópes. Integrating current and historical water chemistry data with long-term piezometric records to develop a regional-scale conceptual flow model: Las Salinas spring, Medina del Campo, Spain. Journal of Hydrology: Regional Studies. 2021; 34 ():100781.
Chicago/Turabian StyleA. De la Hera-Portillo; J. López-Gutiérrez; C. Marín-Lechado; P. Martínez-Santos; A. Ruíz-Constán; M.M. Corral-Lledó; E. Galindo-Rodríguez; R. Mediavilla; J.I. Santisteban; E. Rodríguez-Jiménez; M.F. Callaú-Lópes. 2021. "Integrating current and historical water chemistry data with long-term piezometric records to develop a regional-scale conceptual flow model: Las Salinas spring, Medina del Campo, Spain." Journal of Hydrology: Regional Studies 34, no. : 100781.
Knowledge about the relative impact of climate and socio-economic factors on agriculture is still not well known as they change in space and time. Social researchers stress the role of endogenous (societal, economical, etc.) factors whilst physical/natural scientists focus on the role of climate on land use and land cover change, but the latter do not usually focus on human dynamics. Through the analysis of proxies of land cover, sediment yield (erosion) and salinity changes from sediments in a fluvial wetland in central Spain and documentary evidence collected from the 16th century onwards, it becomes clear that climate impact on farming has changed during this period. Thus, until ca. 1725 CE, agriculture production in central-southern Spain followed the cycles and trends of rainfall at the annual, multiannual and decennial time scales. From that time onwards, production began to show discrepancies with climate, with high production cycles associated with dry periods being common and a sustained productivity that was independent of climate trends and it must be related to socio-economic changes. This change from climate-driven to human-driven agriculture can be seen in other areas of the Iberian Peninsula but at different times that vary from the first half of the 17th century until the first half of the 18th century. These different times can be attributed to diachronous changes in the Little Ice Age phases and local and regional differences in economic factors (such as proximity to commercial routes, development of markets) and their evolution, as supported by the different information sources.
Juan I. Santisteban; Alberto Celis; Rosa Mediavilla; Mª. José Gil-García; Blanca Ruiz-Zapata; Silvino Castaño. The transition from climate-driven to human-driven agriculture during the Little Ice Age in Central Spain: Documentary and fluvial records evidence. Palaeogeography, Palaeoclimatology, Palaeoecology 2020, 562, 110153 .
AMA StyleJuan I. Santisteban, Alberto Celis, Rosa Mediavilla, Mª. José Gil-García, Blanca Ruiz-Zapata, Silvino Castaño. The transition from climate-driven to human-driven agriculture during the Little Ice Age in Central Spain: Documentary and fluvial records evidence. Palaeogeography, Palaeoclimatology, Palaeoecology. 2020; 562 ():110153.
Chicago/Turabian StyleJuan I. Santisteban; Alberto Celis; Rosa Mediavilla; Mª. José Gil-García; Blanca Ruiz-Zapata; Silvino Castaño. 2020. "The transition from climate-driven to human-driven agriculture during the Little Ice Age in Central Spain: Documentary and fluvial records evidence." Palaeogeography, Palaeoclimatology, Palaeoecology 562, no. : 110153.
Wetlands are environments whose water balance is highly sensitive to climate change and human action. This sensitivity has allowed us to explore the relationships between surface water and groundwater in the long term as their sediments record all these changes and go beyond the instrumental/observational period. The Lagunas Reales, in central Spain, is a semi-arid inland wetland endangered by both climate and human activity. The reconstruction of the hydroclimate and water levels from sedimentary facies, as well as the changes in the position of the surface water and groundwater via the record of their geochemical fingerprint in the sediments, has allowed us to establish a conceptual model for the response of the hydrological system (surface water and groundwater) to climate. Arid periods are characterized by low levels of the deeper saline groundwater and by a greater influence of the surface freshwater. A positive water balance during wet periods allows the discharge of the deeper saline groundwater into the wetland, causing an increase in salinity. These results contrast with the classical model where salinity increases were related to greater evaporation rates and this opens up a new way of understanding the evolution of the hydrology of wetlands and their resilience to natural and anthropogenic changes.
Rosa Mediavilla; Juan I. Santisteban; Ignacio López-Cilla; Luis Galán De Frutos; África De La Hera-Portillo. Climate-Dependent Groundwater Discharge on Semi-Arid Inland Ephemeral Wetlands: Lessons from Holocene Sediments of Lagunas Reales in Central Spain. Water 2020, 12, 1911 .
AMA StyleRosa Mediavilla, Juan I. Santisteban, Ignacio López-Cilla, Luis Galán De Frutos, África De La Hera-Portillo. Climate-Dependent Groundwater Discharge on Semi-Arid Inland Ephemeral Wetlands: Lessons from Holocene Sediments of Lagunas Reales in Central Spain. Water. 2020; 12 (7):1911.
Chicago/Turabian StyleRosa Mediavilla; Juan I. Santisteban; Ignacio López-Cilla; Luis Galán De Frutos; África De La Hera-Portillo. 2020. "Climate-Dependent Groundwater Discharge on Semi-Arid Inland Ephemeral Wetlands: Lessons from Holocene Sediments of Lagunas Reales in Central Spain." Water 12, no. 7: 1911.
Facies and geochemical analysis applied marsh deposits are useful proxies for the reconstruction of aridity for the last millennia. The comparison of facies and geochemical records among cores from the Almenara and Benicasim marshes allows to identify changes in water level (Si/Al, Al, Ca) and salinity of the feeding waters (Mg/Al, Na/Al, S/Al). These changes, in turn, represent fluctuations in the position of the saline-fresh groundwater boundary, which can be related to variations in sea level and rainfall. For the last 4000 years, three events recording higher salinity conditions (ca. 3.8 ka BP, ca. 3 ka BP and ca. 1.8 ka BP) are noticeable in the record. Comparison to other studies around the Western Mediterranean basin allows us to correlate these events to arid periods and to identify their forcing mechanisms. These aridity events are correlative to small falls in solar activity and Surface Sea Temperature (SST) during positive North Atlantic Oscillation (NAO) periods. Despite the small magnitude of these changes, the sensitivity of the system amplified the result providing a conspicuous signal.
J.F. Mediato; J.I. Santisteban; B. del Moral; R. Mediavilla; C.J. Dabrio. Aridity events during the last 4000 years in Western Mediterranean marshes (Almenara and Benicasim marshes, E Spain). Quaternary International 2020, 566-567, 303 -314.
AMA StyleJ.F. Mediato, J.I. Santisteban, B. del Moral, R. Mediavilla, C.J. Dabrio. Aridity events during the last 4000 years in Western Mediterranean marshes (Almenara and Benicasim marshes, E Spain). Quaternary International. 2020; 566-567 ():303-314.
Chicago/Turabian StyleJ.F. Mediato; J.I. Santisteban; B. del Moral; R. Mediavilla; C.J. Dabrio. 2020. "Aridity events during the last 4000 years in Western Mediterranean marshes (Almenara and Benicasim marshes, E Spain)." Quaternary International 566-567, no. : 303-314.
The study of flooding can be complex as it involves dynamic systems (rivers) characterized by high variability in time and space. To minimize the effects of these handicaps, we merge several records from different locations across the hydrographic basin of the Upper Guadiana River (central Spain) and use multiple proxies. The comparison of three nearby cores by means of the facies, stratigraphic correlation and geochemical indexes allows us to differentiate local environmental changes related to the natural behaviour of the system (autocyclic) from those driven by external forcings (allocyclic). The facies and facies sequence analyses allow long-term paleohydrological trends to be reconstructed parameters that be used to identify flooding events to be determined. Si (proxy for siliciclastic supply) and Ca/S (proxy for water budget/level) show trends that can be related to facies sequences and long-term variations. Si/Al is used as a sorting proxy (transport efficiency). To analyse the relative changes in sediment discharge and transport efficiency, these proxies are compared with water budget level, represented by Si/Al)/(Ca/S (sorting vs. water level) and Si/(Ca/S) (siliciclastic discharge vs. water discharge). We were able to define local, major and minor regional flood events/periods and events by relating sequence boundaries to the occurrence of environmental conditions related to high energy events (relative/absolute sorting, water level, sediment discharge) across multiple cores. Comparison to other studies around the western Mediterranean basin allows us to identify common periods of flooding at 9000–8400 cal. BP, 7700–7100 cal. BP, 6400–6200 cal. BP, 4900–3700 cal. BP, 3500–3300 cal. BP, ca. 2600 cal. BP, ca. 2000 cal. BP, ca. 1500 cal. BP and 1000–300 cal. BP. For the long-term evolution, it seems that changes in insolation during the Holocene could have played a role in controlling the hydrology. However, determining the drivers of higher-frequency variation is more challenging due to uncertainties in the chronologies and local differences. Nevertheless, some degree of correlation among these flooding periods and higher frequency changes in irradiance, temperature and NAO is observed.
Juan I. Santisteban; Rosa Mediavilla; Luis Galán de Frutos; Ignacio López Cilla. Holocene floods in a complex fluvial wetland in central Spain: Environmental variability, climate and time. Global and Planetary Change 2019, 181, 102986 .
AMA StyleJuan I. Santisteban, Rosa Mediavilla, Luis Galán de Frutos, Ignacio López Cilla. Holocene floods in a complex fluvial wetland in central Spain: Environmental variability, climate and time. Global and Planetary Change. 2019; 181 ():102986.
Chicago/Turabian StyleJuan I. Santisteban; Rosa Mediavilla; Luis Galán de Frutos; Ignacio López Cilla. 2019. "Holocene floods in a complex fluvial wetland in central Spain: Environmental variability, climate and time." Global and Planetary Change 181, no. : 102986.
El control de los recursos hídricos fue un objetivo fundamental para la Monarquía Hispánica en La Mancha durante la Edad Moderna. La desecación en 1751 de la superficie encharcada que forma el actual Parque Nacional de Las Tablas de Daimiel, promovida por Fernando VI, es un buen ejemplo de dicho control. Este artículo analiza los principales factores que confluyeron en aquella decisión que supuso la primera gran obra hidráulica de la monarquía borbónica en la cuenca del Guadiana. Para ello se ha estudiado, principalmente, la evolución de los molinos harineros del entorno de Las Tablas de Daimiel durante la Edad Moderna, los conflictos ocasionados por el control del caudal y la climatología de la zona durante la época estudiada. La presión de los molineros sobre el río y el aumento de la aridez provocaron una creciente conflictividad que la monarquía intentó resolver con la desecación. Sin embargo, el principal objetivo fue satisfacer los intereses recaudatorios de la monarquía y los de una serie de ganaderos de la zona vinculados al rey.
Alberto Celis Pozuelo; Rosa Mediavilla López; Juan I. Santisteban Navarro; Silvino Castaño Castaño. La Monarquía Hispánica y el control de los recursos hídricos: hacia la desecación de Las Tablas de Daimiel de 1751. Hispania 2019, 79, 69 -98.
AMA StyleAlberto Celis Pozuelo, Rosa Mediavilla López, Juan I. Santisteban Navarro, Silvino Castaño Castaño. La Monarquía Hispánica y el control de los recursos hídricos: hacia la desecación de Las Tablas de Daimiel de 1751. Hispania. 2019; 79 (261):69-98.
Chicago/Turabian StyleAlberto Celis Pozuelo; Rosa Mediavilla López; Juan I. Santisteban Navarro; Silvino Castaño Castaño. 2019. "La Monarquía Hispánica y el control de los recursos hídricos: hacia la desecación de Las Tablas de Daimiel de 1751." Hispania 79, no. 261: 69-98.
Floods are one of the gravest natural hazards for societies, worsened by population growth, unchecked development, and climate change. From a Global Change perspective, past extreme events merit particular interest because they can be linked to wider climate and environmental changes, introduce perturbations. During the last decade, knowledge of long-term flood frequency and magnitude has been improved by extracting data from different types of archive. But, despite advances in dating methods, proxies and statistical techniques and efforts to identify atmospheric drivers, some fundamental questions remain unresolved. The Special Issue entitled “Pluridisciplinary analysis and multi-archive reconstruction of paleofloods” in the journal Global and Planetary Change addresses these uncertainties and complexities by assembling a selection of studies, which were first presented at the Past Climate Changes (PAGES) Open Scientific Meeting held at Zaragoza in 2017. In this introductory paper, the guest editors outline the 17 research contributions and meta-data from the 17 paleoflood studies were systematically analyzed in terms of i) geographical distribution; ii) methodologies applied; iii) types of archives; iii) numbers of flood series compiled and iv) spatial and temporal resolution of paleoflood data. The data indicate that paleoflood studies focused on fluvial depositional environments show a higher rate of integration with other types of paleoflood archive (mean of 4.5 types of archive) than studies focused on documentary sources (mean of 3.5) and lake sediments (mean of 2.4). We suggest that this strategy of archive integration has been adapted to effectively compensate for the higher uncertainties of fluvial deposition in floodplains. Statistical processing of the meta-data shows quantitative associations between specific types of flood archive and offers a solid platform for designing the optimal approach for multi-archive paleoflood research. A qualitative review and visual comparison of the 17 paleoflood series shows some consistent trends and breaks but also notable differences within and between regions. While a trend of increased flooding since 4-5 ka BP is evident, the lack of synchronicity between breaks and the coeval increases and decreases in fluvial activity is manifest. The majority of studies in the Special Issue do denote the 19th century – including the youngest cool climate pulses during the Little Ice Age – as a particularly flood-rich period. It is more difficult to assess the 20th century because of social changes, population growth and extensive river modification. Despite the mentioned uncertainties, 10 of 14 papers do not record the 20th century as an exceptional flood period. Assessing the effects of human impact on paleoflood calendars and disentangling anthropogenic from natural drivers are major challenges in integrated paleoflood analysis. It is concluded that the interpretation of flood series is complex as landscapes and flood drivers are heterogeneous and systems show different sensitivities to flood control and drivers. Thus, the study of past floods, from historical and natural archives, is challenging but also offers unparalleled opportunities to document low-frequency, large-magnitude flood events, which occurred under a broad range of climate and/or environmental scenarios, and, probably, the only way to reconstruct robust paleoflood series.
Lothar Schulte; Daniel Schillereff; Juan Ignacio Santisteban. Pluridisciplinary analysis and multi-archive reconstruction of paleofloods: Societal demand, challenges and progress. Global and Planetary Change 2019, 177, 225 -238.
AMA StyleLothar Schulte, Daniel Schillereff, Juan Ignacio Santisteban. Pluridisciplinary analysis and multi-archive reconstruction of paleofloods: Societal demand, challenges and progress. Global and Planetary Change. 2019; 177 ():225-238.
Chicago/Turabian StyleLothar Schulte; Daniel Schillereff; Juan Ignacio Santisteban. 2019. "Pluridisciplinary analysis and multi-archive reconstruction of paleofloods: Societal demand, challenges and progress." Global and Planetary Change 177, no. : 225-238.
Juan I. Santisteban; Rosa Mediavilla; Alberto Celis; Silvino Castaño; Almudena de la Losa. Millennial-scale cycles of aridity as a driver of human occupancy in central Spain? Quaternary International 2016, 407, 96 -109.
AMA StyleJuan I. Santisteban, Rosa Mediavilla, Alberto Celis, Silvino Castaño, Almudena de la Losa. Millennial-scale cycles of aridity as a driver of human occupancy in central Spain? Quaternary International. 2016; 407 ():96-109.
Chicago/Turabian StyleJuan I. Santisteban; Rosa Mediavilla; Alberto Celis; Silvino Castaño; Almudena de la Losa. 2016. "Millennial-scale cycles of aridity as a driver of human occupancy in central Spain?" Quaternary International 407, no. : 96-109.
Peter Houben; Ralf Hoinkis; Juan I. Santisteban; Christina Salat; Rosa Mediavilla; Juan Ignacio Santisteban Navarro. Combining allostratigraphic and lithostratigraphic perspectives to compile subregional records of fluvial responsiveness: The case of the sustainably entrenching Palancia River watershed (Mediterranean coast, NE Spain). Geomorphology 2011, 129, 342 -360.
AMA StylePeter Houben, Ralf Hoinkis, Juan I. Santisteban, Christina Salat, Rosa Mediavilla, Juan Ignacio Santisteban Navarro. Combining allostratigraphic and lithostratigraphic perspectives to compile subregional records of fluvial responsiveness: The case of the sustainably entrenching Palancia River watershed (Mediterranean coast, NE Spain). Geomorphology. 2011; 129 (3-4):342-360.
Chicago/Turabian StylePeter Houben; Ralf Hoinkis; Juan I. Santisteban; Christina Salat; Rosa Mediavilla; Juan Ignacio Santisteban Navarro. 2011. "Combining allostratigraphic and lithostratigraphic perspectives to compile subregional records of fluvial responsiveness: The case of the sustainably entrenching Palancia River watershed (Mediterranean coast, NE Spain)." Geomorphology 129, no. 3-4: 342-360.
Vertebrate and invertebrate faunal biostratigraphy is a well-tested method for establishing relative chronologies for fluviatile sequences that has proved useful in many parts of the world. The robust bones and teeth of large mammals are commonly found in fluviatile deposits, whereas small vertebrates can be readily recovered through systematic sieving of calcareous sediments, as can molluscs, the other major faunal group that has been used for biostratigraphical analysis of fluvial sequences. Because of their rapid and quantifiable rates of evolution, extinction, body mass change and dispersal during the Late Cenozoic, mammals are especially useful for ordering the fragmentary terrestrial sequence of interglacials and glacials, and proposing correlation with the global marine climatostratigraphic record. Other groups (e.g. reptiles and amphibians, ostracods) are as yet only in the initial stages of development as a dating tool, whereas some (e.g. fish, birds) still require substantial development in order to fully explore their utility. As part of IGCP 449, vertebrate and molluscan assemblages have made important contributions to datasets from a number of areas, notably northern France, central Germany, the Czech Republic and the Ukraine. Further south, mammalian assemblages have proved useful in separating discrete periods of climatic change in Iberia and Syria. At greater distances from the core area of fluvial biostratigraphical archives, significant contributions have come from South America (Uruguay River), South Africa (Vaal) and Australia (Riverine Plain and Lake Eyre drainage basin).
D.C. Schreve; D.H. Keen; N. Limondin-Lozouet; P. Auguste; Juan I. Santisteban; M. Ubilla; A. Matoshko; D.R. Bridgland; R. Westaway; Juan Ignacio Santisteban Navarro. Progress in faunal correlation of Late Cenozoic fluvial sequences 2000–4: the report of the IGCP 449 biostratigraphy subgroup. Quaternary Science Reviews 2007, 26, 2970 -2995.
AMA StyleD.C. Schreve, D.H. Keen, N. Limondin-Lozouet, P. Auguste, Juan I. Santisteban, M. Ubilla, A. Matoshko, D.R. Bridgland, R. Westaway, Juan Ignacio Santisteban Navarro. Progress in faunal correlation of Late Cenozoic fluvial sequences 2000–4: the report of the IGCP 449 biostratigraphy subgroup. Quaternary Science Reviews. 2007; 26 (22):2970-2995.
Chicago/Turabian StyleD.C. Schreve; D.H. Keen; N. Limondin-Lozouet; P. Auguste; Juan I. Santisteban; M. Ubilla; A. Matoshko; D.R. Bridgland; R. Westaway; Juan Ignacio Santisteban Navarro. 2007. "Progress in faunal correlation of Late Cenozoic fluvial sequences 2000–4: the report of the IGCP 449 biostratigraphy subgroup." Quaternary Science Reviews 26, no. 22: 2970-2995.