Dendrochronology Course In Valsaín Forest, Segovia, Spain

Touchan, Ramzi; Meko, David M.; Ballesteros‐Cánovas, Juan Antonio; Sánchez‐Salguero, Raúl; Camarero, J. Julio; Kerchouche, Dalila; Muntán, Elena; Khabcheche, Madjda; Blanco, Juan A.; Morata, Clara Rodriguez; Garófano‐Gómez, Virginia; Martín, Luis Ángel Guerras; Alfaro‐Sánchez, Raquel; Garah, Kenza; Hevia, Andrea; Madrigal‐González, Jaime; Sánchez-Miranda, Ángela; Shestakova, Tatiana A.; Tabakova, Maria A.

doi:10.3959/1536-1098-69.2.93

Cited by 9 publications

(6 citation statements)

References 7 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…participants involved in the International Tree-Ring Summer School in 2012 in Valsaín (Segovia-Spain) (Touchan et al, 2013), and especially Kenza Garah, Maria Tabakova Table 2. Statistical parameters used in the models of the basal area increment (BAI).…”

Section: Discussionmentioning

confidence: 99%

“…Field sampling was carried out in August 2012 by selecting three Scots pine stands located at different elevations (Table 1, Fig. 1; additional information on the study area is available in Touchan et al, 2013). One square plot (40 m x 40 m) per elevation was randomly located at 1400 m, near the lower limit of the distribution of Scots pine (henceforth the low-elevation plot), 1650 m (the mid-elevation plot) and 1900 m near the uppermost forest limit (the high-elevation plot).…”

Section: Field Samplingmentioning

confidence: 99%

See 1 more Smart Citation

Disentangling the effects of competition and climate on individual tree growth: A retrospective and dynamic approach in Scots pine

Sánchez‐Salguero

Linares

Camarero

et al. 2015

Forest Ecology and Management

Self Cite

113

View full text Add to dashboard Cite

Climate, stand structure and local site conditions are potentially important determinants of forest dynamics. Understanding the relative contributions of competition and climate to tree growth is critical to project likely stand development under different climate change scenarios. Further, current competition levels and stand structure may reflect legacies of past forest management. Here, we analyze the effects of climate, site conditions and competition on radial growth in three Scots pine plots located along an altitudinal gradient. These stands are subjected to Mediterranean climate with continental influence, i.e., growth is limited by low winter temperatures and dry summer conditions. Current stand structure and retrospective analyses of radial growth (basal area increment, BAI) were used to model changes in tree growth as a function of competition (CI) and climate at an annual resolution. Negative exponential functions characterized the CI-BAI associations, whereas linear mixed-effects models were used to model BAI and to quantify the growth response to climate of trees under low and high competition. Competition effects on growth were steady over time regardless of the elevation and tree age. High competition levels negatively affected growth, with a proportionally stronger influence in suppressed trees than in dominant trees. Sensitivity of tree growth to climate increased with decreasing competition. Altitudinal gradientrelated growth responses to climate were found only for temperature variables. Specifically, growth at high elevations was mainly limited by low winter temperatures, whilst warm spring enhanced growth at middle elevations and late summer temperatures did it at low elevations. Since growth and its sensitivity to climate is more pronounced in low competition trees, we argue that the past management of the forest overrides site conditions and climate effects through the legacies on stand structure and competition. Pro-active forest management practices should be adopted to reduce the vulnerability of previously managed Scots pine forests currently threatened by the predicted warmer and drier conditions.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Field Samplingmentioning

confidence: 99%

Disentangling the effects of competition and climate on individual tree growth: A retrospective and dynamic approach in Scots pine

Sánchez‐Salguero

Linares

Camarero

et al. 2015

Forest Ecology and Management

Self Cite

113

View full text Add to dashboard Cite

show abstract

“…Samples were taken at the contact between the scar edge and the intact wood tissue to make sure that the entire tree-ring record was obtained (Schneuwly et al, 2009a,b). In parallel, undisturbed trees were also sampled in the upper and lower parts of the catchment to build a reference chronology and to identify pointer years for a reliable and precise cross-dating with disturbed trees (Touchan et al, 2013). Tree-ring widths were converted into width indices by standardizing raw data using ARSTAN software (Cook, 1985).…”

Section: Geomorphic Mapping and Sampling Strategymentioning

confidence: 99%

“…Special recognition must be given to CENEAM, Montes de Valsaín, OAPN and JCyL for providing information for this study. Specifically, they want to thank Javier Donés (Director of Montes de Valsaín), Ramzi Touchan and Dave Meko for their support during the study, as well as Andrés Díez and Gerardo Benito and all participants of the Tree-ring summer school carried out in 2012 in Valsaín (Touchan et al, 2013). R. Sánchez-Salguero thanks the financial support from University of Córdoba-Campus de Excelencia Internacional-ceiA3.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Unravelling past flash flood activity in a forested mountain catchment of the Spanish Central System

Ballesteros‐Cánovas

Rodríguez-Morata

Garófano‐Gómez

et al. 2015

Journal of Hydrology

Self Cite

View full text Add to dashboard Cite

Flash floods represent one of the most common natural hazards in mountain catchments, and are fre-quent in Mediterranean environments. As a result of the widespread lack of reliable data on past events, the understanding of their spatio-temporal occurrence and their climatic triggers remains rather limited. Here, we present a dendrogeomorphic reconstruction of past flash flood activity in the Arroyo de los Puentes stream (Sierra de Guadarrama, Spanish Central System). We analyze a total of 287 increment cores from 178 disturbed Scots pine trees (Pinus sylvestris L.) which yielded indications on 212 growth disturbances related to past flash flood impact. In combination with local archives, meteorological data, annual forest management records and highly-resolved terrestrial data (i.e., LiDAR data and aerial imag-ery), the dendrogeomorphic time series allowed dating 25 flash floods over the last three centuries, with a major event leaving an intense geomorphic footprint throughout the catchment in 1936. The analysis of meteorological records suggests that the rainfall thresholds of flash floods vary with the seasonality of events. Dated flash floods in the 20th century were primarily related with synoptic troughs owing to the arrival of air masses from north and west on the Iberian Peninsula during negative indices of the North Atlantic Oscillation. The results of this study contribute considerably to a better understanding of hazards related with hydrogeomorphic processes in central Spain in general and in the Sierra de Guadarrama National Park in particular.

show abstract

“…Increment cores were then prepared and measured using the standard dendrochronological procedures as described in Stoffel and Corona (2014). From each tree, growth series were measured visually checked for dating errors and then statistically cross-dated using an existing reference chronology from the study area (Ballesteros-Cánovas et al, 2015b;Touchan et al, 2013). From the sampled trees the following characteristics have been considered reactions to flash flood activity and related scarring: callus tissues bordering scars as well as sudden growth suppression resulting from stem and/or root damage.…”

Section: Dendrogeomorphic Analysismentioning

confidence: 99%

Regional reconstruction of flash flood history in the Guadarrama range (Central System, Spain)

Rodríguez-Morata

Ballesteros‐Cánovas

Trappmann³

et al. 2016

Science of The Total Environment

View full text Add to dashboard Cite

• Flash floods represent a regional natural hazard in Guadarrama range.• Dendrochronology allows fill the lack of systematic data in mountain environments.• Regional studies and quality samples allow reducing the number of collected samples.• We complement existing records with 8 events covering the last~200 years.• Forest management could limit the amount of proxy evidence of flash flood events. Flash floods are a common natural hazard in Mediterranean mountain environments and responsible for serious economic and human disasters. The study of flash flood dynamics and their triggers is a key issue; however, the retrieval of historical data is often limited in mountain regions as a result of short time series and the systematic lack of historical data. In this study, we attempt to overcome data deficiency by supplementing existing records with dendrogeomorphic techniques which were employed in seven mountain streams along the northern slopes of the Guadarrama Mountain range. Here we present results derived from the tree-ring analysis of 117 samples from 63 Pinus sylvestris L. trees injured by flash floods, to complement existing flash flood records covering the last~200 years and comment on their hydro-meteorological triggers. To understand the varying number of reconstructed flash flood events in each of the catchments, we also performed a comparative analysis of geomorphic catchment characteristics, land use evolution and forest management. Furthermore, we discuss the limitations of dendrogeomorphic techniques applied in managed forests. G R A P H I C A L A B S T R A C T a b s t r a c t a r t i c l e i n f o

show abstract

Dendrochronology Course In Valsaín Forest, Segovia, Spain

Cited by 9 publications

References 7 publications

Disentangling the effects of competition and climate on individual tree growth: A retrospective and dynamic approach in Scots pine

Disentangling the effects of competition and climate on individual tree growth: A retrospective and dynamic approach in Scots pine

Unravelling past flash flood activity in a forested mountain catchment of the Spanish Central System

Regional reconstruction of flash flood history in the Guadarrama range (Central System, Spain)

Contact Info

Product

Resources

About