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Introduction
Publications
Publications (49)
Once pesticides are released into the environment, their active ingredient and other formulation compounds, such as coadjuvants or solvents, may undergo biological and chemical degradation, and form a range of products that could be even more hazardous than their precursors. These degradation products may also interact with the natural biogenic com...
Aim
The mechanisms of plant trait adaptation and acclimation are still poorly understood and, consequently, lack a consistent representation in terrestrial biosphere models (TBMs). Despite the increasing availability of geo‐referenced trait observations, current databases are still insufficient to cover all vegetation types and environmental condit...
The mechanisms of plant trait adaptation and acclimation are still poorly understood and, consequently, lack a consistent representation in terrestrial biosphere models (TBMs). Despite the increasing availability of geo‐referenced trait observations, current databases are still insufficient to cover all vegetation types and environmental conditions...
The aim of this study was to systematically analyze the potential and limitations of using plant functional trait observations from global databases versus in situ data to improve our understanding of vegetation impacts on ecosystem functional properties (EFPs). Using ecosystem photosynthetic capacity as an example, we first provide an objective ap...
We studied carbon balances and carbon stocks of mountain rangelands and meadows in a network of 8 eddy covariance sites and 14 sites with biomass data in Europe. Net ecosystem exchange of pastures and extensively managed semi-natural rangelands were usually close to zero, while meadows fixed carbon, with the exception of one meadow that was establi...
Plant phenological development is orchestrated through subtle changes in
photoperiod, temperature, soil moisture and nutrient availability.
Presently, the exact timing of plant development stages and their response
to climate and management practices are crudely represented in land surface
models. As visual observations of phenology are laborious,...
Plant phenological development is orchestrated through subtle changes in photoperiod, temperature, soil moisture and nutrient availability. Presently, the exact timing of plant development stages and their response to climate and management practices are crudely represented in land surface models. As visual observations of phenology are laborious,...
This paper validates different MODIS products using in situ field measurements. To this end, a temporal series of normalized difference vegetation index (NDVI, MOD/MYD13Q1), leaf area index (LAI, MOD/MYD/MCD15A2) and gross primary productivity (GPP, MOD/MY17A2) products acquired between 2009 and 2011 are analysed.The study area is located in a “deh...
The self-heating correction is known to modify open-path eddy covariance estimates of net ecosystem CO2 exchange, typically towards reduced uptake or enhanced emissions, but with a magnitude heretofore not generally documented. We assess the magnitude of this correction to be of order 1 μmol m−2 s−1 (daytime) for half-hourly fluxes and consistently...
Autotrophic and heterotrophic components of soil CO2 efflux may have differential responses to environmental factors, so estimating the relative contribution of each component during summer precipitation pulses is essential to predict C balance in soils experiencing regular drought conditions. As even small summer rains induced high instantaneous s...
The effects of SO2 exposure, carried out in controlled-environment cuvettes, on the photosynthetic performance of the liverwort Frullania dilatata (L.) Dum. were investigated by means of chorophyll a fluorescence induction kinetics and gas-exchange measurements. Additionally, visible-injury symptoms developing in leaves as a result of exposure to t...
Soil respiration (SR) constitutes the largest flux of CO(2) from terrestrial ecosystems to the atmosphere. However, there still exist considerable uncertainties as to its actual magnitude, as well as its spatial and interannual variability. Based on a reanalysis and synthesis of 80 site-years for 57 forests, plantations, savannas, shrublands and gr...
Grasslands and agroecosystems occupy one-third of the terrestrial area, but their contribution to the global carbon cycle remains uncertain. We used a set of 316 site-years of CO2 exchange measurements to quantify gross primary productivity, respiration, and light-response parameters of grasslands, shrublands/savanna, wetlands, and cropland ecosyst...
Soil respiration (SR) constitutes the largest flux of CO2 from terrestrial ecosystems to the atmosphere. There still exist considerable uncertainties as to its actual magnitude, as well as its spatial and interannual variability. Based on a reanalysis and synthesis of 72 site-years for 58 forests, plantations, savannas, shrublands and grasslands fr...
The magnitude of CO2 efflux pulses after rewetting a dry soil is highly variable and the factors regulating these pulses are poorly understood. In this field experiment, we aimed to study the C dynamics after simulated summer rainstorms in a Mediterranean open holm oak woodland (dehesa). We hypothesized that because the herbaceous cover is mostly d...
The net ecosystem carbon dioxide (CO2) exchange (NEE) of nine European mountain grassland ecosystems was measured during 2002–2004 using the eddy covariance method.
Overall, the availability of photosynthetically active radiation (PPFD) was the single most important abiotic influence factor
for NEE. Its role changed markedly during the course of th...
Soil respiration constitutes the second largest flux of carbon (C) between terrestrial ecosystems and the atmosphere. This study provides a synthesis of soil respiration (R
s) in 20 European grasslands across a climatic transect, including ten meadows, eight pastures and two unmanaged grasslands. Maximum rates of R
s (
\( R_{{{\text{s}}_{{{\text{ma...
Tower CO2 flux measurements from 20 European grasslands in the EUROGRASSFLUX data set covering a wide range of environmental and management conditions were analyzed with respect to their ecophysiological characteristics and CO2 exchange (gross primary production, Pg, and ecosystem respiration, Re) using light-response function analysis. Photosynthe...
Grassland management is considered a key factor in the global carbon cycle dynamics. We aimed to evaluate how ecosystem respiration (ER) of grazed systems is influenced by abandonment and determine to which extent abiotic and biotic factors might explain CO2 effluxes. In two subalpine grasslands in the eastern Pyrenees, we established two grazing t...
Bryophyte flora of studied area includes 158 taxa, 142 mosses and 16 liverworts; 21 taxa are new to Guadalajara, 21 to Cuenca and 3 to Teruel. La brioflora del territorio estudiado incluye 158 taxones, 142 musgos y 16 hepáticas, de los cuales 21 son novedades regionales para Guadalajara, 21 para Cuenca y 3 para Teruel.
Crossidium laxefilamentosum Frey & Kürschner is shown to be a distinct taxon that is easily distinguished from the related C. crassinerve. Discovery of two plants of C. laxefilamentosum with sporophytes has permitted the description of the capsule and spore characters for the first time. This species is recorded as new to Europe and to North Africa...
Crossidium laxefilamentosum Frey & Kürschner is shown to be a distinct taxon that is easily distinguished from the related C. crassinerve. Discovery of two plants of C. laxefilamentosum with sporophytes has permitted the description of the capsule and spore characters for the first time. This species is recorded as new to Europe and to North Africa...
Bulk deposition composition and pine branch washing were measured from April 1999 to March 2000 on the east coast of Spain. The main objective was to characterise N deposition patterns with special emphasis on dry deposition. Bulk deposition in the region is dominated by neutralisation processes by Ca2+ and HCO3-, ClNa of marine origin and a high c...
The effects of elevated gaseous SO2 concentrations in the lichens Evernia prunastri (L.) Ach. and Ramalina farinacea (L.) Ach. were investigated by means of gas exchange, modulated chlorophyll fluorescence analysis and antioxidant enzyme assays. The response to SO2 of the studied species differed markedly. Net photosynthetic rates were more adverse...
In execution of the Directive 92/43/CEE, Generalitat Valenciana has approved the incorporation proposal to the net Nature 2000 of until 17% of the territory of the Valencian Community. The micro-reserves of flora differ of the Protected Natural Spaces in that their fundamental end is not the protection, but the obtaining of a net of representation...
GIMENO, C., PUCHE, F., SEGARRA, J. G. & LAGUNA, E., 2001. A conservation model of
bryophyte flora in the Valencian Community: micro-reserves of cryptogamic flora. Bot.
Complutensis 25: 221-231.
In execution of the Directive 92/43/CEE, Generalitat Valenciana has approved the incorporation
proposal to the net Nature 2000 of until 17% of the territory...
The dynamics of bryophyte vegetation in burnt Mediterranean forests were studied over a period of 30 months at three different sites which were burnt in 1992. The number of bryophyte species, cover of each species, and total bryophyte turf cover was estimated for each site. The of some vegetative propagation Structures was tested, and observations...
This paper examines chlorophyll content and morphological changes in cellular structure induced by transplanting two species of aquatic bryophytes, Rhynchostegium riparioides (Hedw.) Card. and Fontinalis hypnoides Hartm., in different sites of the rio Palancia (Castellon, East Spain). Two transplanting devices have been tested, a nylon mesh bag and...
Flora and vegetation of hygro-hydrophilous bryophytes in Valencia County (eastern Spain). The bryophyte flora and vegetation have been studied in aquatic and wet environments of Valencia County (eastern Spain). A catalogue of 74 taxa is given, 3 species are new for eastern Spain and 6 for provinces of Valencia County (Valencia = 4, Castellon = 2)....
RESUMEN Se ha realizado un estudio preliminar sobre la deposición atmosférica de metales pesados utilizando musgos terrestres en localidades rurales de las provincias de Valencia, Castellón y Teruel. El objetivo de este trabajo es evaluar, por primera vez,la calidad del aire de esta zona medianre la bioacumulación de metales pesados en musgos autóc...
The interactions among water content, chlorophyll a fluorescence emission, xanthophyll interconversions and net photosynthesis were analyzed during dehydration in desiccation-tolerant
Frullania dilatata (L.) Dum. and desiccation-intolerant Pellia endiviifolia (Dicks) Dum. Water loss led to a progressive suppression of photosynthetic carbon assimila...
The interactions among water content, chlorophyll a fluorescence emission, and potassium leakage were analyzed during dehydration in desiccation-tolerant bryophytes from xeric habitats (Hedwigia ciliata (Hedw.) P. Beauv., Hypnum cupressiforme Hedw., Leucodon sciuroides (Hedw.) Schwaegr., Orthotrichum cupulatum Brid., Pleurochaete squarrosa (Brid.)...
A data base of all reported bryophytes till January 1998 from Valencia region is shown.
The checklist includes 436 taxa of bryophytes, 350 mosses and 86 liverworts. Rarity of taxa
and biogeographical aspects are discussed.
The precise boundary delineations between taxa in symbiotic associations are very important for evolutionary and ecophysiological studies. Growing evidence indicates that in many cases, the use of either morphological characters or molecular markers results in diversity underestimation. In lichen symbioses, Trebouxia is the most common genus of lic...
Resumen En este trabajo se estudia la flora briológica de 10s principales afloramientos yesíferos de la Comunidad Valenciana. Se ha elaborado un catálogo de 66 táxones, algunos de ellos poc0 citados hasta ahora en nuestro territorio. Se incluyen datos sobre las características del suelo (CE, pH y concentraciones de Mg+2, Ca+2, Na+, K+). Palabras cl...
