El abandono del pastoreo afecta negativamente a la calidad del pasto en pastizales atlánticos ibéricos

  1. Aldezabal, Arantza 1
  2. Pérez-López, Usue 1
  3. Laskurain, Nere Amaia 1
  4. Iñaki Odriozola Larrañaga
  1. 1 Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, UPV/EHU
  2. 2 Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, UPV/EHU - Laboratory of Environmental Microbiology, Institute of Microbiology of the CAS
Revista:
Pirineos

ISSN: 0373-2568

Any de publicació: 2019

Número: 174

Pàgines: 42-42

Tipus: Article

DOI: 10.3989/PIRINEOS.2019.174002 DIALNET GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Pirineos

Resum

La calidad del pasto en los pastizales de montaña es un factor importante para mantener o mejorar el rendimiento animal. Estudios previos han identificado atributos vegetales beneficiosos para la nutrición animal; sin embargo, poco se sabe sobre su mantenimiento en comunidades vegetales. Nuestra principal hipótesis sostiene que el pastoreo favorece a las especies con una alta capacidad de rebrote y una baja eficiencia de utilización de recursos, promoviendo así la producción de pasto de alta calidad. Para testar la hipótesis, realizamos un experimento de exclusión del pastoreo en un pastizal de la montaña atlántica, combinado con un marco teórico de respuesta-efecto basado en varios atributos vegetales y una metodología estadística apropiada para medir la contribución relativa del recambio de especies y la variabilidad intraespecífica de los atributos (ITV) tras el abandono del pastoreo. Nuestros resultados mostraron que la calidad del pasto disminuyó tras el abandono del pastoreo a corto plazo, principalmente debido al efecto de la ITV. Los efectos por recambio de especies podrían aparecer tras un período más largo de abandono si, tal y como es esperable, las gramíneas altas con tejidos de baja calidad nutritiva sustituyen a las especies de mayor calidad.

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The authors would like to thank Nuria Vitores (post-graduate student of UPV/EHU), Jon Miranda (postdoc researcher of UPV/EHU) and Joxe Antonio Irastortza (guard of the Aralar Natural Park) for their technical assistance. This study was funded by the Basque Government (IT1022-15), the Ministry of Economy and Competitiveness of Spanish Government (ref: AGL2013-48361-C2-1-R), and an FPI-EHU grant provided to I.O.

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