Effects of abandoning long-term goat grazing on species composition and species richness of pastures at La Gomera, Canary Islands

  • J. R. Arevalo Facultad de Biología. Universidad de La Laguna
  • L. de Nascimento Facultad de Biología. Universidad de La Laguna
  • S. Fernandez-Lugo Facultad de Biología. Universidad de La Laguna
  • I. Saro Facultad de Biología. Universidad de La Laguna
  • A. Camacho Escuela Técnica Superior de Ingeniería Agraria. Universidad de La Laguna
  • J. Mata Escuela Técnica Superior de Ingeniería Agraria. Universidad de La Laguna
  • L. Bermejo Escuela Técnica Superior de Ingeniería Agraria. Universidad de La Laguna
Keywords: detrended correspondence analysis, plant community, rarefaction, sustainability

Abstract

Goat grazing management is a powerful ecological force structuring plant communities which effects are highly different depending on factors such as climatic conditions, grazing intensity, type of plant community, etc. Pastures in the Canary Islands have important heritage, socioeconomic and landscape values because they are the remains of traditional livestock management and a key element of local economy. An experimental study of goat grazing exclusion has been carried out in an area of La Gomera Island to determine the main effects of grazing abandonment on species richness and species composition. The species composition of La Gomera pastures is more sensitive to grazing than to climatic variability, though effects in the species richness in relation to grazing were not detected. Because the pasture origin in this area involved artificial, removing of non useful plants in order to provide land for agriculture more than 300 years ago, and using it for pastures around 80 years ago, the sustainable use has maintained this rich plant community. Grazing abandonment can have a negative effect on the pastures’ diversity, as grazing has been a strong force in the maintenance of certain species. Public promotion of this primary activity is suggested to allow the continuation with minimal effects on the vegetation composition. This will help to conserve the high diversity of this area and the promotion of natural values as well as traditional and sustainable human activities.

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References

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How to Cite
Arevalo, J. R., de Nascimento, L., Fernandez-Lugo, S., Saro, I., Camacho, A., Mata, J., & Bermejo, L. (1). Effects of abandoning long-term goat grazing on species composition and species richness of pastures at La Gomera, Canary Islands. Spanish Journal of Agricultural Research, 9(1), 113-123. https://doi.org/10.5424/sjar/20110901-076-10
Section
Agricultural environment and ecology