Changes in spatial point patterns of pioneer woody plants across a large tropical landslide

Velázquez, Eduardo; Cruz Rot, Marcelino de la y Gómez-Sal, Antonio (2014). Changes in spatial point patterns of pioneer woody plants across a large tropical landslide. "Acta Oecologica" (n. 61); pp. 9-18. ISSN 1146-609X.

Descripción

Título: Changes in spatial point patterns of pioneer woody plants across a large tropical landslide
Autor/es:
  • Velázquez, Eduardo
  • Cruz Rot, Marcelino de la
  • Gómez-Sal, Antonio
Tipo de Documento: Artículo
Título de Revista/Publicación: Acta Oecologica
Fecha: 2014
Materias:
Escuela: E.U.I.T. Agrícolas (UPM)
Departamento: Biotecnología - Biología Vegetal
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaCGL2009-13190-C03-02Sin especificarSin especificarSin especificar

Más información

ID de Registro: 37390
Identificador DC: http://oa.upm.es/37390/
Identificador OAI: oai:oa.upm.es:37390
Depositado por: Memoria Investigacion
Depositado el: 29 Sep 2015 11:49
Ultima Modificación: 29 Sep 2015 11:49
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