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Biological Invasions

, Volume 20, Issue 3, pp 793–807 | Cite as

Contrasting effects of invasive rabbits on endemic plants driving vegetation change in a subtropical alpine insular environment

  • Jonay Cubas
  • José Luis Martín-Esquivel
  • Manuel Nogales
  • Severin D. H. Irl
  • Raquel Hernández-Hernández
  • Marta López-Darias
  • Manuel Marrero-Gómez
  • Marcelino J. del Arco
  • Juana María González-Mancebo
Original Paper

Abstract

Alpine ecosystems on islands are among the most isolated on Earth, leading to very high rates of endemism. Endemic species on oceanic islands are particularly vulnerable to invasive herbivores. In the alpine zone of Tenerife, which harbors a unique endemic flora, the dominance pattern of the two most dominant species in our days (Spartocytisus supranubius and Pterocephalus lasiospermus) has shifted in the last few decades, which may be a result of increasing rabbit pressure. In this study we explore how rabbits affect the population structure, soil nutrient composition and regeneration of our two target endemics within Teide National Park. For this purpose, we established 90 plots at 30 locations. Within 13 locations we sampled permanent exclosure plots that were established between 7 and 12 years before sampling, applying three treatments (full herbivory, rabbit herbivory and no herbivory). At one site we collected 80 soil samples to evaluate changes in soil chemistry and plant growth using a greenhouse experiment. Our results show that rabbits have a negative effect on the population structure of S. supranubius, while the contrary occurs with P. lasiospermus. Rabbit presence alters soil chemistry leading to a decline in nitrogen, which affects growth in both species. The presence of rabbits leads to a dominance shift in these two keystone endemic species, altering dominance patterns in the summit scrub of Tenerife. The decline of S. supranubius could represent the example of many endemic species of this system. Thus, we call for an immediate control of rabbit population (< 0.5 rabbits/ha) to protect this unique alpine endemic flora.

Keywords

Conservation Density-damage relationship El Teide National Park Exclosure experiment Oryctolagus cuniculus Vegetation dynamic 

Notes

Acknowledgements

We thank Julio Leal Pérez, Alexandra Rodríguez-Romero, Josué Álvarez and Víctor Bello-Rodríguez for their great assistance assembling the plots and quadrats, and taking data in the field. Also Julien Piquet, Natalia Díaz Cristina Jiménez Gomís and Ministerio del Interior (army), for their help in some part of the field work. We also thank the Ministerio de Agricultura, Alimentation y Medio Ambiente (REF 1621/2015) for the financial support and the service of El Teide National Park provided use with all kind of facilities for development of this study. Jonay Cubas holds a PhD studentship from La Laguna University.

Supplementary material

10530_2017_1576_MOESM1_ESM.docx (26 kb)
Supplementary material 1 (DOCX 26 kb)

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Jonay Cubas
    • 1
  • José Luis Martín-Esquivel
    • 2
  • Manuel Nogales
    • 3
  • Severin D. H. Irl
    • 4
  • Raquel Hernández-Hernández
    • 1
  • Marta López-Darias
    • 3
  • Manuel Marrero-Gómez
    • 2
  • Marcelino J. del Arco
    • 1
  • Juana María González-Mancebo
    • 1
  1. 1.Plant Conservation and Biogeography Research Group, Departamento de Botánica, Ecología y Fisiología VegetalUniversidad de La LagunaLa LagunaSpain
  2. 2.Parque Nacional del TeideLa OrotavaSpain
  3. 3.Island Ecology and Evolution Research Group (IPNA-CSIC)La LagunaSpain
  4. 4.Department of Biogeography, Bayreuth Center of Ecology and Environmental Research (BayCEER)University of BayreuthBayreuthGermany

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