Memorias de investigación
Artículos en revistas:
Changes in spatial point patterns of pioneer woody plants across a large tropical landslide
Año:2014
Áreas de investigación
  • Botánica,
  • Ecología
Datos
Descripción
We assessed whether the relative importance of positive and negative interactions in early successional communities varied across a large landslide on Casita Volcano (Nicaragua). We tested several hypotheses concerning the signatures of these processes in the spatial patterns of woody pioneer plants, as well as those of mortality and recruitment events, in several zones of the landslide differing in substrate stability and fertility, over a period of two years (2001 and 2002). We identified all woody individuals with a diameter >1 cm and mapped them in 28 plots measuring 10 × 10-m. On these maps, we performed a spatial point pattern analysis using univariate and bivariate pair-correlation functions; g (r) and g12 (r), and pairwise differences of univariate and bivariate functions. Spatial signatures of positive and negative interactions among woody plants were more prevalent in the most and least stressful zones of the landslide, respectively. Natural and human-induced disturbances such as the occurrence of fire, removal of newly colonizing plants through erosion and clearcutting of pioneer trees were also identified as potentially important pattern-creating processes. These results are in agreement with the stress-gradient hypothesis, which states that the relative importance of facilitation and competition varies inversely across gradients of abiotic stress. Our findings also indicate that the assembly of early successional plant communities in large heterogeneous landslides might be driven by a much larger array of processes than previously thought.
Internacional
Si
JCR del ISI
Si
Título de la revista
Acta Oecologica
ISSN
1146-609X
Factor de impacto JCR
1,84
Información de impacto
Volumen
61
DOI
. http://dx.doi.org/10.1016/j.actao.2014.09.001
Número de revista
Desde la página
9
Hasta la página
18
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Eduardo Velázquez Helmholtz-Zentrum für Umweltforschung
  • Autor: Marcelino de la Cruz Rot UPM
  • Autor: Antonio Gómez-Sal Universidad de Alcalá
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Biodiversidad y conservación de recursos fitogenéticos
  • Departamento: Biotecnología - Biología Vegetal