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Four years of experimental warming do not modify the interaction between subalpine shrub species
Anadon Rosell, Alba (Universitat de Barcelona. Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals)
Ninot Sugrañes, Josep M. (Universitat de Barcelona. Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals)
Palacio Blasco, Sara (Instituto Pirenaico de Ecología. CSIC)
Grau Fernández, Oriol (Centre de Recerca Ecològica i Aplicacions Forestals)
Nogués Mestres, Salvador (Universitat de Barcelona. Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals)
Navarro, Enrique (Instituto Pirenaico de Ecología. CSIC)
Sancho, M. Carmen (Instituto Pirenaico de Ecología. CSIC)
Carrillo Ortuño, Empar (Universitat de Barcelona. Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals)

Data: 2017
Resum: Climate warming can lead to changes in alpine plant species interactions through modifications in environmental conditions, which may ultimately cause drastic changes in plant communities. We explored the effects of 4 years of experimental warming with open-top chambers (OTC) on Vaccinium myrtillus performance and its interaction with neighbouring shrubs at the Pyrenean treeline ecotone. We examined the effects of warming on height, above-ground (AG) and below-ground (BG) biomass and the C and N concentration and isotope composition of V. myrtillus growing in pure stands or in stands mixed with Vaccinium uliginosum or Rhododendron ferrugineum. We also analysed variations in soil N concentrations, rhizosphere C/N ratios and the functional diversity of the microbial community, and evaluated whether warming altered the biomass, C and N concentration and isotope composition of V. uliginosum in mixed plots. Our results showed that warming induced positive changes in the AG growth of V. myrtillus but not BG, while V. uliginosum did not respond to warming. Vaccinium myrtillus performance did not differ between stand types under increased temperatures, suggesting that warming did not induce shifts in the interaction between V. myrtillus and its neighbouring species. These findings contrast with previous studies in which species interactions changed when temperature was modified. Our results show that species interactions can be less responsive to warming in natural plant communities than in removal experiments, highlighting the need for studies involving the natural assembly of plant species and communities when exploring the effect of environmental changes on plant-plant interactions.
Nota: We thank Clara Borrull, Noelia Seguer, Estela Illa, Victoria Lafuente, Elena Lahoz and Santiago Pérez for their field and laboratory assistance. We are grateful to CCiT of the University of Barcelona for the use of their facilities and their technical assistance. This work was supported by Conselh Generau d’Aran and the project ARBALMONT/786-2012 (Organismo Autónomo Parques Nacionales, Ministerio de Agricultura, Alimentación y Medio Ambiente, Spain). AAR was funded by an FPU grant (Ministerio de Educación, Cultura y Deporte, Spain) and SP was funded by a Ramón y Cajal fellowship (RYC-2013-14164, Ministerio de Economía y Competitividad, Spain).
Nota: Imbalance-P paper contact with: Oriol Grau: grau.oriol@gmail.com
Nota: Número d'acord de subvenció MINECO/RYC-2013-14164
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Dwarf shrub ; Passive warming ; Plant interactions ; Pyrenees ; Vaccinium myrtillus
Publicat a: Oecologia, April 2017, Vol. 183, issue 4 (April 2017) , p. 1167–1181, ISSN 0029-8549

DOI: 10.1007/s00442-017-3830-7


Disponible a partir de: 2018-04-30
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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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 Registre creat el 2017-07-05, darrera modificació el 2017-07-12



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