Resultados totales (Incluyendo duplicados): 33532
Encontrada(s) 3354 página(s)
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278268
Dataset. 2018

DATA FROM: CLIMATE VARIABILITY AND COMMUNITY STABILITY IN MEDITERRANEAN SHRUBLANDS: THE ROLE OF FUNCTIONAL DIVERSITY AND SOIL ENVIRONMENT

  • Pérez-Ramos, Ignacio Manuel
  • Díaz-Delgado, Ricardo
  • Riva, E. G. de la
  • Villar Montero, Rafael
  • Lloret, Francisco
  • Marañón, Teodoro
Temporal changes in plant cover, functional composition and diversity. This file contains all the data used in the different statistical analyses of this study in order to answer the following questions: : (i) how sensitive are Mediterranean shrubland communities to inter-annual variability in climate?; (ii) are communities with higher functional diversity more stable against climatic fluctuations?; and (iii) are shrubland communities growing on poorer soils more stable over time than those located on resource-richer soils? Dataset_Pérez-Ramos et al. 2017.xlsx, 1.Understanding how different factors mediate the resistance of communities to climatic variability is a question of considerable ecological interest that remains mostly unresolved. This is particularly remarkable to improve predictions about the impact of climate change on vegetation. 2.Here we used a trait-based approach to analyse the sensitivity to climatic variability over nine years of 19 Mediterranean shrubland communities located in southwest Spain. We evaluated the role of functional diversity and soil environment as drivers of community stability (assessed as changes in plant cover, species diversity and composition). 3.The studied shrubland communities were strongly sensitive to inter-annual variability in climate. First, colder and drier conditions caused remarkable decreases in total plant cover but increased functional diversity, likely because the reduction of plant cover after harsh climatic conditions promoted the expansion of functionally dissimilar species in the new open microsites; although communities returned to their initial values of plant cover after nine years, changes in functional diversity and structure persisted over time. Second, drier and colder conditions favoured the predominance of shrubs with a conservative resource-use strategy (i.e. with higher dry matter content in leaves, stems and roots), bigger seeds and a more efficient use of water. 4.The most functionally diverse communities were the most stable over time in terms of species diversity, likely because a higher number of functionally dissimilar species allowed compensatory dynamics among them. 5.Communities inhabiting more acidic and resource-limited environments were less variable over time, probably because they were mainly constituted by slow-growth, stress-tolerant species that are potentially better adapted to harsh climatic conditions. 6.Synthesis: This study highlights the utility of a trait-based approach to evaluate how plant communities respond to climatic variability. We could infer that the increased frequency of extreme climatic events predicted by climatic models will alter the functional structure of shrubland communities, with potential repercussions for ecosystem functioning. Our results also provide new insights into the role of functional diversity and soil environment as buffers of the climate impact on woody communities, as well as potentially useful information to be applied in ecologically-based management and restoration strategies., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278268
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278268
HANDLE: http://hdl.handle.net/10261/278268
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278268
PMID: http://hdl.handle.net/10261/278268
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278268
Ver en: http://hdl.handle.net/10261/278268
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278268

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278282
Dataset. 2018

DATA FROM: BIOLOGICAL INVASION MODIFIES THE CO-OCCURRENCE PATTERNS OF INSECTS ALONG A STRESS GRADIENT

  • Carbonell, José Antonio
  • Velasco, Josefa
  • Millán, Andrés
  • Green, Andy J.
  • Coccia, Cristina
  • Guareschi, Simone
  • Gutiérrez-Cánovas, Cayetano
Compressed file containing 7 archives: environmental and biological data from invaded and non-invaded areas (original dataset); environmental and biological data from invaded area (to be used for data analysis along with the R script); environmental and biological data from non-invaded area (to be used for data analysis along with the R script); physiological and biological traits of corixids and their categories (to be used for data analysis along with the R script); affinity values of species for each trait category (to be used for data analysis along with the R script), physiological and biological traits of corixids and their categories (original dataset); document with detailed archives description., Biological invasions have become one of the most important drivers of biodiversity loss and ecosystem change world-wide. However, it is still unclear how invasions may interact with local abiotic stressors, which are expected to increase as global change intensifies. Furthermore, we know little about the response to biological invasions of insects, despite their disproportionate contribution to global animal biodiversity. The aim of the present work is to investigate the impact of an invasive aquatic insect on the co-occurrence patterns of native species of insects along a salinity gradient, and determine which assembly rules are driving these patterns. First, we characterised the habitat specialisation and functional niches of each species from physiological and biological traits, respectively, and their degree of overlap. Second, we used field data to compare the co-occurrence patterns of native and invasive species in invaded and non-invaded areas of southern Iberia and northern Morocco. Finally, we tested if habitat filtering or niche differentiation assembly rules mediate their co-occurrence. In non-invaded areas, habitat filtering drives habitat segregation of species along the salinity gradient, with a lower contribution of niche differentiation. The presence of the invasive insect modifies the distribution and co-occurrence patterns of native species. In invaded areas, niche differentiation seems to be the main mechanism to avoid competition among the invasive and native species, enabling coexistence and resource partitioning. The combined study of functional niche similarity and abiotic stressor tolerance of invasive and native species can improve our understanding of the effects of invasive species along abiotic stress gradients. This approach may increase our capacity to predict the outcomes of biological invasion in a global change context., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278282
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278282
HANDLE: http://hdl.handle.net/10261/278282
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278282
PMID: http://hdl.handle.net/10261/278282
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278282
Ver en: http://hdl.handle.net/10261/278282
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278282

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278288
Dataset. 2018

DATA FROM: NEANDERTAL AND DENISOVAN DNA FROM PLEISTOCENE SEDIMENTS

  • Slon, Viviane
  • Hopfe, Charlotte
  • Weiß, Clemens L.
  • Mafessoni, Fabrizio
  • De la Rasilla, Marco
  • Lalueza-Fox, Carles
Multiple sequence alignment files This submission contains multiple sequence alignment files used for phylogenetic reconstructions. Sequences reconstructed from sediments are denominated by the site and layer of origin. The comparative data (identical in all files) is identified by the name of the individual and the accession code of its mtDNA sequence. MSA_sedimentDNA.zip, Although a rich record of Pleistocene human-associated archaeological assemblages exists, the scarcity of hominin fossils often impedes the understanding of which hominins occupied a site. Using targeted enrichment of mitochondrial DNA we show that cave sediments represent a rich source of ancient mammalian DNA that often includes traces of hominin DNA, even at sites and in layers where no hominin remains have been discovered. By automation-assisted screening of numerous sediment samples we detect Neandertal DNA in eight archaeological layers from four caves in Eurasia. In Denisova Cave we retrieved Denisovan DNA in a Middle Pleistocene layer near the bottom of the stratigraphy. Our work opens the possibility to detect the presence of hominin groups at sites and in areas where no skeletal remains are found., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278288
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278288
HANDLE: http://hdl.handle.net/10261/278288
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278288
PMID: http://hdl.handle.net/10261/278288
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278288
Ver en: http://hdl.handle.net/10261/278288
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278288

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278294
Dataset. 2018

DATA FROM: GREAT SPOTTED CUCKOO NESTLINGS HAVE NO ANTIPREDATORY EFFECT ON MAGPIE OR CARRION CROW HOST NESTS IN SOUTHERN SPAIN

  • Soler, Manuel
  • Neve, Liesbeth de
  • Roldán, María
  • Pérez-Contreras, Tomás
  • Soler, Juan José
Host defences against cuckoo parasitism and cuckoo trickeries to overcome them are a classic example of antagonistic coevolution. Recently it has been reported that this relationship may turn to be mutualistic in the case of the carrion crow (Corvus corone) and its brood parasite, the great spotted cuckoo (Clamator glandarius), given that experimentally and naturally parasitized nests were depredated at a lower rate than non-parasitized nests. This result was interpreted as a consequence of the antipredatory properties of a fetid cloacal secretion produced by cuckoo nestlings, which presumably deters predators from parasitized host nests. This potential defensive mechanism would therefore explain the detected higher fledgling success of parasitized nests during breeding seasons with high predation risk. Here, in a different study population, we explored the expected benefits in terms of reduced nest predation in naturally and experimentally parasitized nests of two different host species, carrion crows and magpies (Pica pica). During the incubation phase non-parasitized nests were depredated more frequently than parasitized nests. However, during the nestling phase, parasitized nests were not depredated at a lower rate than non-parasitized nests, neither in magpie nor in carrion crow nests, and experimental translocation of great spotted cuckoo hatchlings did not reveal causal effects between parasitism state and predation rate of host nests. Therefore, our results do not fit expectations and, thus, do not support the fascinating possibility that great spotted cuckoo nestlings could have an antipredatory effect for host nestlings, at least in our study area. We also discuss different possibilities that may conciliate these with previous results, but also several alternative explanations, including the lack of generalizability of the previously documented mutualistic association., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278294
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278294
HANDLE: http://hdl.handle.net/10261/278294
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278294
PMID: http://hdl.handle.net/10261/278294
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278294
Ver en: http://hdl.handle.net/10261/278294
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278294

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278300
Dataset. 2018

DATA FROM: SIZE, AGE, AND HABITAT DETERMINE EFFECTIVENESS OF PALAU'S MARINE PROTECTED AREAS

  • Friedlander, Alan M.
  • Golbuu, Yimnang
  • Ballesteros, Enric
  • Caselle, Jennifer E.
  • Gouezo, Marine
  • Olsudong, Dawnette
  • Sala, Enric
Usage Notes: Palau_fishdata_Dryad Palau fish data Palau_benthicdata_Dryad, Palau has a rich heritage of conservation that has evolved from the traditional moratoria on fishing, or "bul", to more western Marine Protected Areas (MPAs), while still retaining elements of customary management and tenure. In 2003, the Palau Protected Areas Network (PAN) was created to conserve Palau's unique biodiversity and culture, and is the country's mechanism for achieving the goals of the Micronesia Challenge (MC), an initiative to conserve ?30% of near-shore marine resources within the region by 2020. The PAN comprises a network of numerous MPAs within Palau that vary in age, size, level of management, and habitat, which provide an excellent opportunity to test hypotheses concerning MPA design and function using multiple discreet sampling units. Our sampling design provided a robust space for time comparison to evaluate the relative influence of potential drivers of MPA efficacy. Our results showed that no-take MPAs had, on average, nearly twice the biomass of resource fishes (i.e. those important commercially, culturally, or for subsistence) compared to nearby unprotected areas. Biomass of non-resource fishes showed no differences between no-take areas and areas open to fishing. The most striking difference between no-take MPAs and unprotected areas was the more than 5-fold greater biomass of piscivorous fishes in the MPAs compared to fished areas. The most important determinates of no-take MPA success in conserving resource fish biomass were MPA size and years of protection. Habitat and distance from shore had little effect on resource fish biomass. The extensive network of MPAs in Palau likely provides important conservation and tourism benefits to the Republic, and may also provide fisheries benefits by protecting spawning aggregation sites, and potentially through adult spillover., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278300
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278300
HANDLE: http://hdl.handle.net/10261/278300
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278300
PMID: http://hdl.handle.net/10261/278300
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278300
Ver en: http://hdl.handle.net/10261/278300
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278300

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278324
Dataset. 2018

DATA FROM: NULL ALLELES ARE UBIQUITOUS AT MICROSATELLITE LOCI IN THE WEDGE CLAM (DONAX TRUNCULUS)

  • Rico, Ciro
  • Cuesta, José A.
  • Drake, Pilar
  • Macpherson, Enrique
  • Bernatchez, Louis
  • Marie, Amandine D.
Usage Notes: Databases used for the analyses. We provide three databases: the database we used for the analyses (16 loci), the database with the original annealing temperature (10 loci), and the database with the new annealing temperature (10 loci). Dataset-PeerJ.xlsx, Recent studies have reported an unusually high frequency of nonamplifying alleles at microsatellite loci in bivalves. Null alleles have been associated with heterozygous deficits in many studies. While several studies have tested for its presence using different analytical tools, few have empirically tested for its consequences in estimating population structure and differentiation. We characterised 16 newly developed microsatellite loci and show that null alleles are ubiquitous in the wedge clam, Donax trunculus. We carried out several tests to demonstrate that the large heterozygous deficits observed in the newly characterised loci were most likely due to null alleles. We tested the robustness of microsatellite genotyping for population assignment by showing that well-recognised biogeographic regions of the south Atlantic and south Mediterranean coast of Spain harbour genetically different populations., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278324
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278324
HANDLE: http://hdl.handle.net/10261/278324
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278324
PMID: http://hdl.handle.net/10261/278324
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278324
Ver en: http://hdl.handle.net/10261/278324
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278324

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278329
Dataset. 2018

DATA FROM: GENERATION AND MAINTENANCE OF PREDATION HOTSPOTS OF A FUNCTIONALLY IMPORTANT HERBIVORE IN A PATCHY HABITAT MOSAIC

  • Farina, Simone
  • Oltra, Aitana
  • Boada, Jordi
  • Bartumeus, Frederic
  • Pozueta Romero, Javier
  • Alcoverro, Teresa
Usage Notes: dataset of Generation and maintenance of predation hotspots of a functionally important herbivore in a patchy habitat mosaic Data file contains values for each patch of the accumulated predation rate after 5 days and 10 days of the experiment (response variable) and of the attributes at patch and landscape levels (z-score of HSA) used as predictor in the Multi-model averaging selection. Bold numbers evidence patches where high aggregations of predation risk occurred (predation hotspots). dataset.xlsx, 1. By modifying how critical ecosystem functions are distributed across the landscape, the spatial configuration and characteristics of patches can play a strong role in structuring communities. In strongly predator-controlled ecosystems, this patchy distribution of function can have complex downstream consequences, subjecting some areas to disproportionately high rates of predation, leaving other areas susceptible to herbivore outbreaks. 2. In this study we assess how spatial attributes at patch and landscape scales potentially influence the spatial and temporal distribution of predation on a functionally important herbivore in a patchy Mediterranean marine macrophyte community characterized by strong top-down control. 3. We experimentally tracked how predation risk of tethered sea urchins varied across space over a 10-day period in a patchy seagrass meadow. We related these patterns with patch and landscape-level attributes across the habitat mosaic. 4. At the level of the patch, predation risk was highest in seagrass patches with low canopies, without access to sheltering rocks. Scaling up to the landscape mosaic however, predation risk increased in dense aggregations of patches with high perimeter-to-area ratios close to rocky habitats. Predation aggregated in spatially-explicit hotspots and coldspots that were maintained through time. Interestingly, this pattern of predation risk correlated well with the natural abundance of sea urchins. 5. Our results show that spatial patch configuration can be a strong mediator of top trophic functions in marine ecosystems, causing significant clumping in the way predation – and therefore herbivory – are distributed across space. Given the importance of top-down control for these shallow marine ecosystems, it is crucial to incorporate landscape attributes in understanding the impact of functionally important herbivores on highly fragmented habitats., Peer reviewed

Proyecto: //

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278341
Dataset. 2018

DATA FROM: A PRIORITISED LIST OF INVASIVE ALIEN SPECIES TO ASSIST THE EFFECTIVE IMPLEMENTATION OF EU LEGISLATION

  • Carboneras, Carles
  • Genovesi, Piero
  • Vilà, Montserrat
  • Blackburn, Tim M.
  • Carrete, Martina
  • Clavero, Miguel
  • D'Hondt, Bram
  • Orueta, Jorge F.
  • Gallardo, Belinda
  • Geraldes, Pedro
  • González-Moreno, Pablo
  • Greogory, Richard D.
  • Nentwig, Wolfgang
  • Paquet, Jean-Yves
  • Pyšek, Petr
  • Rabitsch, Wolfgang
  • Ramírez, Iván
  • Scalera, Riccardo
  • Tella, José Luis
  • Walton, Paul
  • Wynde, Robin
Prioritised list of invasive alien species in the European Union, according to the year when a risk assessment should be available, with an indication of the sources of information used for review. Contains 1323 species assessed for their potential inclusion in the EU list of invasive species of Union concern, based on their maximum reported impact (from databases and literature) and their invasion history in Europe. JPECarbonerasST2.xlsx, 1. Effective prevention and control of invasive species generally relies on a comprehensive, coherent and representative list of species that enables resources to be used optimally. European Union (EU) Regulation 1143/2014 on invasive alien species (IAS) aims to control or eradicate priority species, and to manage pathways to prevent the introduction and establishment of new IAS; it applies to species considered of Union concern and subject to formal risk assessment. So far, 49 species have been listed but the criteria for selecting species for risk assessment have not been disclosed and were probably unsystematic. 2. We developed a simple method to systematically rank invasive alien species according to their maximum potential threat to biodiversity in the EU. We identified 1323 species as potential candidates for listing, and evaluated them against their invasion stages and reported impacts, using information from databases and scientific literature. 3. 900 species fitted the criteria for listing according to IAS Regulation. We prioritised 207 species for urgent risk assessment, 59 by 2018 and 148 by 2020, based on their potential to permanently damage native species or ecosystems; another 336 species were identified for a second phase (by 2025), to prevent or reverse their profound impacts on biodiversity; and a further 357 species for assessment by 2030. 4. Policy implications. We propose a systematic, proactive approach to selecting and prioritising invasive alien species for risk assessment to assist European Union policy implementation. We assess an unprecedented number of species with potential to harm EU biodiversity using simple methodology that we developed, and recommend which species should be considered for risk assessment in a ranked order of priority along the timeline 2018-2030, based on their maximum reported impact and their invasion history in Europe., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/278341
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278341
HANDLE: http://hdl.handle.net/10261/278341
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278341
PMID: http://hdl.handle.net/10261/278341
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278341
Ver en: http://hdl.handle.net/10261/278341
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278341

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278354
Dataset. 2018

DATA FROM: PERSISTING IN DEFAUNATED LANDSCAPES: REDUCED PLANT POPULATION CONNECTIVITY AFTER SEED DISPERSAL COLLAPSE

  • Pérez-Méndez, Néstor
  • Jordano, Pedro
  • Valido, Alfredo
data_PerezMendez_Neochamaelea_populations_JEcol Genetic distances among populations of N. pulverulenta in Gran Canaria, Tenerife and La Gomera (Euclidean genetic distances, GD; conditional genetic distance, cGD), and isolation by resistances values for: topographic complexity, potential and current vegetation, climate, non-resistance, and range shape of N. pulverulenta, 1. Defaunation of large-bodied frugivores could be causing severe losses of crucial ecosystem functions such as seed dispersal. The immediate ecological consequences may include alteration or even collapse of seed-mediated gene flow affecting plant population connectivity, with impacts on the regional scale distribution of genetic variation. Yet these far-reaching consequences of defaunation remain understudied. 2. Here we tested whether human-induced defaunation of the Canarian frugivorous lizards (Gallotia, Lacertidae) altered within-island population connectivity and the amount and large-scale distribution of genetic variation of Neochamaelea pulverulenta (Rutaceae), which relies exclusively on these lizards for seed dispersal. Our study system defines a lizard downsizing gradient with three contrasted ecological scenarios (islands) with relatively optimal (Gran Canaria; large-sized lizards), sub-optimal (Tenerife; medium) and collapsed seed dispersal processes (La Gomera; small). We extensively sampled individual plant genotypes from 80 populations spanning the full geographic range of the plant to examine their genetic diversity, population-genetic network topologies, and the patterns of isolation both by distance (IBD) and resistance (IBR) across these three ecological scenarios. 3. Plant genetic diversity appeared unaffected by defaunation-mediated downsizing of frugivorous lizards. However, we found a reduced overall plant population connectivity together with an increased isolation by distance within the most defaunated islands (La Gomera and, to a lesser extent, Tenerife) when compared with the scenario preserving the functionality of lizard-mediated seed dispersal (Gran Canaria). The results, with a significant effect of lizard downsizing, were robust when controlling for biotic/abiotic differences among the three islands by means of isolation by resistance models (IBR). 4. Synthesis. Our results provide valuable insights into the far-reaching consequences of the deterioration of mutualisms on plant population dynamics over very large spatial scales. Conservation of large-bodied frugivores is thus essential because their irreplaceable mutualistic dispersal services maintain an extensive movement of seeds across the landscape, crucial for maintaining the genetic cohesiveness of metapopulations and the adaptive potential of plant species across their entire geographic range., Peer reviewed

Proyecto: //

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/278371
Dataset. 2018

DATA FROM: POOR PLANT PERFORMANCE UNDER SIMULATED CLIMATE CHANGE IS LINKED TO MYCORRHIZAL RESPONSES IN A SEMIARID SHRUBLAND

  • León-Sánchez, Lupe
  • Nicolás Nicolás, Emilio
  • Goberna, Marta
  • Prieto, Iván
  • Maestre, Fernando T.
  • Querejeta Mercader, José Ignacio
Usage Notes: Dataset for León-Sánchez et al. Journal of Ecology Data was collected in a field climate change simulation experiment in Aranjuez, in central Spain (40°02′N–3°32′W, 495 m altitude). The dataset includes leaf gas exchange measurements, isotopic C composition, leaf nutrients (P, N), leaf morphological traits, plant biomass, plant survival and mycorrhizal fungi relative abundances. León-Sánchez_etal_dataset.xlsx, 1.Warmer and drier conditions associated with ongoing climate change will increase abiotic stress for plants and mycorrhizal fungi in drylands worldwide, thereby potentially reducing vegetation cover and productivity and increasing the risk of land degradation and desertification. Rhizosphere microbial interactions and feedbacks are critical processes that could either mitigate or aggravate the vulnerability of dryland vegetation to forecasted climate change. 2.We conducted a four-year manipulative study in a semiarid shrubland in the Iberian Peninsula to assess the effects of warming (~2.5°C; W), rainfall reduction (~30%; RR) and their combination (W+RR) on the performance of native shrubs (Helianthemum squamatum) and their associated mycorrhizal fungi. 3.Warming (W and W+RR) decreased the net photosynthetic rates of H. squamatum shrubs by ~31% despite concurrent increases in stomatal conductance (~33%), leading to sharp decreases (~50%) in water use efficiency. Warming also advanced growth phenology, decreased leaf nitrogen and phosphorus contents per unit area, reduced shoot biomass production by ~36% and decreased survival during a dry year in both W and W+RR plants. Plants under RR showed more moderate decreases (~10-20%) in photosynthesis, stomatal conductance and shoot growth. 4.Warming, RR and W+RR altered ectomycorrhizal fungal (EMF) community structure and drastically reduced the relative abundance of EMF sequences obtained by high-throughput sequencing, a response associated with decreases in the leaf nitrogen, phosphorus and dry matter contents of their host plants. In contrast to EMF, the community structure and relative sequence abundances of other non-mycorrhizal fungal guilds were not significantly affected by the climate manipulation treatments. 5.Synthesis: Our findings highlight the vulnerability of both native plants and their symbiotic mycorrhizal fungi to climate warming and drying in semiarid shrublands, and point to the importance of a deeper understanding of plant-soil feedbacks to predict dryland vegetation responses to forecasted aridification. The interdependent responses of plants and ectomycorrhizal fungi to warming and rainfall reduction may lead to a detrimental feedback loop on vegetation productivity and nutrient pool size, which could amplify the adverse impacts of forecasted climate change on ecosystem functioning in EMF-dominated drylands., Peer reviewed

Proyecto: //

Buscador avanzado