Vicente Rozas

Vicente Rozas
Universidad de Valladolid | UVA · Departamento de Ciencias Agroforestales

PhD

About

121
Publications
50,966
Reads
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2,738
Citations
Introduction
I am working at the Botany Area, Departamento de Ciencias Agroforestales, Universidad de Valladolid, Soria Campus, Spain. My research is focused on the effects of disturbances, climatic patterns and global change on growth and survival of trees. I use annual growth rings to assess the impact of climate variation and past management on temperate and Mediterranean forests in Europe, South America and North Africa. I am also interested in reconstructing past fire regimes and evaluating the differential behaviour of the sexes in dioecious woody species.
Additional affiliations
October 2015 - September 2019
Universidad de Valladolid
Position
  • Professor (Assistant)
July 2015 - September 2015
Universidad Austral de Chile
Position
  • Researcher
May 2013 - August 2013
University of Santiago de Compostela
Position
  • Research Assistant
Education
September 1995 - August 1999
University of Oviedo
Field of study
  • Botany

Publications

Publications (121)
Article
Tree features may modulate the sensitivity of radial growth to climate, leading to a nonuniform response. Age-related increases in climatic sensitivity have been observed repeatedly. Sex-related climatic sensitivity is also possible because of the long-term differential reproductive cost between the sexes. This study analysed the simultaneous effec...
Article
The accuracy of direct (based on increment cores) and indirect (based on age-size relationships) methods of tree age estimation in Fagus sylvatica and Quercus robur was tested. This was done through increment cores and stem discs taken in an old-growth forest of Northern Spain. It was found that cross-dating was more precise than ring counting by u...
Article
Past regeneration patterns of Quercus robur L. and Fagus sylvatica L. and their relationship to canopy structure, disturbances and forest-use history were investigated in an old-growth, lowland forest in Cantabria, Northern Spain. Dendroecological techniques were used to estimate tree ages and reconstruct disturbance histories in four representativ...
Article
Induced defences in conifers are an effective strategy that allows individuals to increase resistance against pests and pathogens by optimizing associated costs. Studies exploring inducibility of defences in conifers have usually been conducted in young individuals (i.e., seedlings and saplings) whereby effects were addressed within weeks or months...
Article
Full-text available
The response of European beech (Fagus sylvatica L.) to climate warming will depend on the ability of their populations to adjust tree performance to water shortage. By exploring inter- and intra-annual variations in secondary growth and mean vessel area (MVA), we assessed the effects of precipitation on cambial activity and hydraulic control during...
Article
Full-text available
Austrocedrus chilensis is a South American conifer broadly distributed across the subtropical and extratropical Andes that is widely utilized in tree-ring studies. This species has clear annual growth rings that are sensitive to the moisture supply and has been extensively used to reconstruct the past hydroclimate during the last millennium. Despit...
Article
Standard procedures to obtain high quality images of wood samples have become a bottleneck in the digitization of dendrochronology. Digitization is currently dominated by flatbed scanners, but the use of these devices is limited by sample length and surface flatness. Although several solutions based on digital photography have been published, they...
Article
Tree‐ring data has been widely used to inform about tree growth responses to drought at the individual scale, but less is known about how tree growth sensitivity to drought scales up driving changes in forest dynamics. Here, we related tree‐ring growth chronologies and stand‐level forest changes in basal area from two independent datasets to test i...
Article
Full-text available
El cambio climático afecta a los bosques de formas muy distintas. Algunos de estos impactos, como las defoliaciones por heladas tardías, son inesperados. El aumento de las temperaturas primaverales está adelantando la fecha de brotación de los bosques caducifolios. Pero también se está observando una mayor variabilidad intra- e interanual en las te...
Article
To counteract the effects of herbivores and pathogens, conifers have developed a sophisticated resin-based defensive system. Since defences are costly, trees must continuously accommodate defensive investment through plastic responses to environmental stimuli. However, the extent of such responses can differ at the intra-specific level (i.e. geneti...
Article
Tetraclinis articulata is a xerothermic Mediterranean conifer native from NW Africa that grows under semiarid conditions in the Atlas Mountains. This species is particularly well adapted to water scarcity and forms xeric woodlands subjected to recurring drought, aridification and overexploitation. Wood of T. articulata has been considered of limite...
Article
Full-text available
Prumnopitys andina is a South American podocarp with a restricted distribution in southern Andean temperate forests, and is severely threatened due to habitat loss. Despite much dendrochronological work on other temperate South American conifers, little is known about the dendrochronological potential of P. andina. Here, we examine the main feature...
Article
The climate response and resilience of tree growth to drought events have been widely reported for forests from the Northern Hemisphere. However, studies are much scarcer in the extra-tropical forests of southern South America. Mediterranean and Temperate forests of Chile are suffering from a moderate warming and a sustained precipitation decrease,...
Article
Climate change is increasing the frequency of extreme climate events, causing profound impacts on forest function and composition. Late frost defoliation (LFD) events, the loss of photosynthetic tissues due to low temperatures at the start of the growing season, might become more recurrent under future climate scenarios. Therefore, the detection of...
Article
Climate warming is driving an advance of leaf unfolding date in temperate deciduous forests, promoting longer growing seasons and higher carbon gains. However, an earlier leaf phenology also increases the risk of late frost defoliation (LFD) events. Compiling the spatio‐temporal patterns of defoliations caused by spring frost events is critical to...
Article
Quantifying intraspecific genetic variation and phenotypic plasticity of traits involved in drought tolerance is essential to forecast forest tree vulnerability to climate change. Tree ring analysis was applied to retrospectively assess the resistance, recovery and resilience of a Mediterranean pine in the face of extreme climate episodes. We combi...
Article
The adaptive potential and genetic background of tree species will determine their performance and vitality under changing climate conditions. How environment and genotype influence secondary growth and their climate sensitivity in boreal and temperate conifers has been fairly studied. Provenance studies assessing the genetic variation in plasticit...
Article
Full-text available
Intraspecific variation in plant defences is expected to be the result of adaptive and plastic responses to environmental conditions, where trade-offs between growth and defences are thought to play a key role shaping phenotypic patterns in defensive investment. Axial resin ducts are costly defensive structures that remain imprinted in the tree rin...
Article
Conifers have evolved different chemical and anatomical defenses against a wide range of antagonists. Resin ducts produce, store and translocate oleoresin, a complex terpenoid mixture that acts as both a physical and a chemical defense. Although resin duct characteristics (e.g., number, density, area) have been positively related to biotic resistan...
Article
The negative impacts of drought on forest growth and productivity last for several years generating legacies, although the factors that determine why such legacies vary across sites and tree species remain unclear. We used an extensive network of tree‐ring width (RWI, ring‐width index) records of 16 tree species from 567 forests, and high‐resolutio...
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Full-text available
Navaea phoenicea (Malvaceae) is a flagship shrub species endemic to Tenerife Island in the Canary archipelago and is included as Endangered on the Spanish Red List. We conducted a comprehensive census and monitored the structure of eight accessible populations over 10 years to develop a stage-based demographic matrix model and performed determinist...
Article
This study links tree-ring growth and gross primary production for a variety of forest types under different environmental conditions across Spain. NOAA-AVHRR satellite imagery data were combined with dendrochronological records and climate data at a fine spatial resolution (1.21 km2) to analyze the interannual variability of tree-ring growth and v...
Article
Full-text available
Extreme climatic events, such as late frosts in spring during leaf flush, have considerable impacts on the radial growth of temperate broadleaf trees. Albeit, all broadleaved species are potentially vulnerable, damage depends on the particularities of the local climate, the species, and its phenology. The impact of late spring frosts has been widel...
Article
Full-text available
Warming-related growth decrease on southern Fagus sylvatica forests has been observed in different regions; however, whether it is a generalized fact or not remains unclear. Here we investigate the geographical pattern on growth response of the southwestern European beech forests to the warming climate shift which started in the 1980s. We sampled 1...
Article
Could a tree survive for centuries on an oceanic island under strong human pressure? And what if the island is subject to the recurrent activity of several volcanoes? The Canary Islands archipelago, in the North Atlantic Ocean, meets both conditions. These volcanic islands have been inhabited by humans for the last two millennia (Arco et al. 1997)...
Article
Trees’ growth responses to climate may depend on tree age and site conditions. In dioecious species, sex adds an extra level of complexity due to differential reproductive effort between the sexes and potentially sex-related dimorphic growth. Araucaria araucana is a long-lived dioecious conifer with outstanding morphological and functional adaptati...
Article
Drought is one of the key natural hazards impacting net primary production and tree growth in forest ecosystems. Nonetheless, tree species show different responses to drought events, which make it difficult to adopt fixed tools for monitoring drought impacts under contrasting environmental and climatic conditions. In this study, we assess the respo...
Article
Drought is one of the key natural hazards impacting net primary production and tree growth in forest ecosystems. Nonetheless, tree species show different responses to drought events, which make it difficult to adopt fixed tools for monitoring drought impacts under contrasting environmental and climatic conditions. In this study, we assess the respo...
Article
We obtained tree-ring chronologies for pedunculate oak along an altitudinal gradient of four sites in NW Iberia, which covers most of the species range within the region. Trees grow under Atlantic climate, with a rainfall maximum in autumn-winter, and a minimum during summer, but lacking a remarkable drought. Chronologies included several earlywood...
Data
Supplementary material caption Fig. S1. View of the four study sites with Austrocedrus chilensis populations in the upper Cachapoal Valley, central Chile. Fig. S2. Cross sections of Austrocedrus chilensis relict wood showing multiple fire scars. Fig. S3. Continuous wavelet power spectra of mean fire frequency and mean fire interval in the 1200–1...
Article
The long-term history of fire regimes in the Mediterranean Andes of Chile is almost unknown. Subalpine woodlands of Austrocedrus chilensis include long-lived trees resilient to low-intensity fires, which can provide valuable tree-ring-based information about fire history. In this work, we performed an annually resolved multicentury reconstruction o...
Article
Quercus pyrenaica is one of the most widespread species in pure or mixed stands across the Iberian Peninsula. It mostly occurs in mountain areas within the Mediterranean region, but also dominates forests along the boundary to the Atlantic northern Iberia. Given this role as a transitional species, the understanding of its behavior is of great rele...
Article
Aim We investigate the effects of the environmental and geographical processes driving growth resilience and recovery in response to drought in Mediterranean Pinus pinaster forests. We explicitly consider how intraspecific variability modulates growth resilience to drought. Location Western Mediterranean basin. Methods We analysed tree rings from...
Article
Deciphering climatic factors limiting cambial activity is critical to forecast the potential of trees to respond to ongoing climatic change. We explored multiple xylem traits, including tree-ring width, inter-annual microdensity variation and intra-annual density fluctuations (IADF), to unveil the climatic factors constraining cambial activity of a...
Article
Forecasted increase drought frequency and severity may drive worldwide declines in forest productivity. Species-level responses to a drier world are likely to be influenced by their functional traits. Here, we analyse forest resilience to drought using an extensive network of tree-ring width data and satellite imagery. We compiled proxies of forest...
Article
Full-text available
Mexican beech (Fagus grandifolia subsp. mexicana) has been classified as an endangered species because of its restricted distribution. The current distribution of Mexican beech, which is considered a Miocene relict, is limited to Tropical Montane Cloud Forests (TMCF) in the mountains of the Sierra Madre Oriental in eastern Mexico.We used dendroclim...
Article
Increased drought frequency and severity may reshape tree species distribution in arid environments. Dioecious tree species may be more sensitive to climate warming if sex-related vulnerability to drought occurs, since lower performance of one sex may drive differential stress tolerance, sex-related mortality rates and biased sex ratios. We explore...
Article
Oceanic islands ecosystems are among the most endangered in the world, as the effects of ongoing climate change may potentially combine with other pre-existing drivers of plant population decline. In the Canary Islands, nitrogen-fixing Teide broom (Spartocytisus supranubius) is a keystone species in the Teide National Park high mountain ecosystem....
Article
The impact of climate on xylem structure and function has been profusely studied for a variety of species in the last decades, but the ecological role of ring porosity under increasing levels of environmental stress has been scarcely assessed. In this study, we analyse the timing of earlywood vessels occlusions by tyloses in two ring-porous species...
Article
Nothomyrcia fernandeziana (Hook. & Arn.) Kausel is an endemic tree species from Robinson Crusoe Island (RC), Juan Fernández archipelago, Chile. Aristotelia chilensis (Molina) Stuntz, is an invasive species introduced in the island since the mid XIX century that compete with endemic species and threatens their conservation. Radial growth patterns ca...
Article
The earlywood vessels of ring-porous trees can be analyzed dendrochronologically and used as a proxy for environmental information. However, most works deal with the analysis of contemporary climate-growth relationships and do not evaluate their long-term variation. We obtained a 481-year chronology of earlywood vessel size of oak (Quercus robur L....
Article
Full-text available
Nothomyrcia fernandeziana (Hook. & Arn.) Kausel is an endemic tree species from Robinson Crusoe Island (RC), Juan Fernández Archipelago, Chile. Aristotelia chilensis (Molina) Stuntz, is an invasive species introduced in the island since the mid XIX century that compete with endemic species and threatens their conservation. Radial growth patterns ca...
Article
Environmental conditions and the structure of the dormant cambium are assumed to affect seasonal patterns of cambial activity, hence controlling allocation of non-structural carbohydrates (NSC) to growth. However, seasonal dynamics of xylogenesis, and their connections with NSC content and dormant cambium size, have been rarely assessed along an en...
Article
Iberian temperate forests are distributed along the boundary between the Atlantic and the Mediterranean biogeographical regions, and represent the south-western range edges of diverse European broadleaved deciduous tree species. Trees growing at the boundary between Atlantic and Mediterranean biomes suffer from different stresses, including increas...
Article
Tree-ring widths and intrannual wood density fluctuations (IADFs) are sound proxies of the environmental factors that control the growth of forest tree species. In this work we evaluated the impact of climate on radial growth and IADFs formation in an Austrocedrus chilensis plantation in Valdivia, Chile. We calculated mean tree-ring chronology and...
Article
Full-text available
Non-structural carbohydrates (NSC) play a central role in the construction and maintenance of a tree's vascular system, but feedbacks between the NSC status of trees and wood formation are not fully understood. We aimed to evaluate multiple dependencies among wood anatomy, winter NSC, and phenology for coexisting temperate (Quercus robur) and sub-M...
Article
Full-text available
Little dendroclimatic research has been conducted on species of Podocarpus, in response to inherent difficulties associated with tree-ring differentiation and cross-dating. We sampled complete stem cross sections from a plantation of Podocarpus salignus trees in Valdivia, Chile, near the southern edge of the species’ range. We measured earlywood, l...
Article
Differences in reproductive costs between male and female plants have been shown to foster sex-related variability in growth and C-storage patterns. The extent to which differential secondary growth in dioecious trees is associated with changes in stem carbohydrate storage patterns, however, has not been fully assessed. We explored the long-term ra...
Article
Full-text available
Tree rings provide information about the climatic conditions during the growing season by recording them in different anatomical features, such as intra-annual density fluctuations (IADFs). IADFs are intra-annual changes of wood density appearing as latewood-like cells within earlywood, or earlywood-like cells within latewood. The occurrence of IAD...
Article
Divergent evolutionary pressures associated with differential reproductive costs in dioecious trees may lead to sex-related variation in non-reproductive functions. Sex-related differences may be site-dependent, with different outcomes depending on environmental conditions. We explored the effects of sex and environmental conditions on the climatic...
Article
This study addresses relationships between leaf phenology, xylogenesis, and functional xylem anatomy in two ring-porous oak species, the temperate Quercus robur and the sub-Mediterranean Q. pyrenaica. Earlywood vessel (EV) formation and leaf phenology were monitored in 2012 and 2013. Ten individuals per species were sampled at each of three sites l...
Article
Juniperus thurifera L. (Cupressaceae) is a dioecious tree inhabiting the Western Mediterranean Basin in areas under Mediterranean continental climate. Spain (95.1%) and Morocco (4.8%) host the largest populations. Diverse dendroecological research developed during the last years has improved our knowledge about this species functioning and its fore...
Article
In this work, an individual-based approach was used to assess the relative importance of tree age, size, and competition in modulating the individual dendroclimatic response of Quercus robur L. This was performed in a multi-aged forest in northwestern Spain under a wet Atlantic climate. All trees in five replicated forest stands with homogeneous so...
Article
Full-text available
In order to understand the impact of drought and intrinsic water-use efficiency (iWUE) on tree growth, we evaluated the relative importance of direct and indirect effects of water availability on secondary growth and xylem anatomy of Juniperus thurifera, a Mediterranean anisohydric conifer. Dendrochronological techniques, quantitative xylem anatomy...
Article
• Aim. The Mediterranean Basin is considered to be a climate-change hotspot, for which rising temperatures and associated aridification have been forecast. Such trends could affect the performance and growth of conifers in these drought-prone areas. We evaluated whether radial growth and wood density can act as proxy measures of precipitation and d...
Article
We studied the climatic signal of the earlywood anatomy of a temperate (Quercus petraea (Mattuschka) Liebl.) and a sub-Mediterranean (Quercus pyrenaica Willd.) oak species growing under similar climatic conditions in a transitional area between the Atlantic and Mediterranean regions of the Iberian Peninsula. We hypothesized that both species react...
Article
• Background and Aims: The dependence of oak decline on climatic stressors is fairly well documented, but little is known about the impact of soil properties on growth plasticity and as predisposing factors to decline. Here we investigate if oak dieback and individual responses to climatic stresses are related to soil nutrient availability. • Metho...
Article
Tree-ring growth of Pinus canariensis at high elevation on Tenerife, Canary Islands, has been suggested to be mainly controlled by drought-induced stress. Aspect of mountain slopes on this oceanic island strongly influences local water input, with trade winds maintaining humid weather conditions on windward, while leeward slopes remain much more ar...
Article
Tree-ring anatomy reflects the year-by-year impact of environmental factors on tree growth. Up to now, research in this field has mainly focused on the hydraulic architecture, with ray parenchyma neglected despite the growing recognition of its relevance for xylem function. Our aim was to address this gap by exploring the potential of the annual pa...