Factors influencing the dispersion of Arceuthobium oxycedri in Central Spain: evaluation with a new null model for marked point patterrns

Ramón Contento, Pablo Ancelmo and Cruz Rot, Marcelino de la and Zavala Morencos, Ignacio de and Zavala Girones, Miguel Ángel (2016). Factors influencing the dispersion of Arceuthobium oxycedri in Central Spain: evaluation with a new null model for marked point patterrns. "Forest Pathology", v. 46 (n. 6); pp. 1-12. ISSN 1437-4781. https://doi.org/10.1111/efp.12279.

Description

Title: Factors influencing the dispersion of Arceuthobium oxycedri in Central Spain: evaluation with a new null model for marked point patterrns
Author/s:
  • Ramón Contento, Pablo Ancelmo
  • Cruz Rot, Marcelino de la
  • Zavala Morencos, Ignacio de
  • Zavala Girones, Miguel Ángel
Item Type: Article
Título de Revista/Publicación: Forest Pathology
Date: May 2016
ISSN: 1437-4781
Volume: 46
Subjects:
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Ingeniería Agroforestal
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The dwarf mistletoe, Arceuthobium oxycedri, is found on populations of Juniperus oxycedrus, in central Spain. This species can have negative effects on the physiology of its host, including mortality. Understanding the mechanisms that control its distribution and dispersal is critical to assessing its potential for spread. We assessed dwarf mistletoe distribution within a population of J. oxycedrus, including infected and uninfected host individuals. A new null model of parasitic dispersion was built using two dispersal kernel forms that were simulated with lower and upper envelopes for second-order functions to summarize a point pattern, such as Ripley?s K, nearest-neighbour distribution and pair correlation functions. Nine dispersal scenarios were constructed with half-bandwidth kernels (10, 20, 30 m) and initial population of infected trees (P0 = 05, 10 and 20). These scenarios were compared with the observed pattern and evaluated using the goodnessof- fit test. Significant differences at short distance (r < 10 m) were found between the observed pattern and simulated patterns, corresponding to the range of seed dispersal of the dwarf mistletoe. Interactions between infected and uninfected hosts patterns at all scales were identified, suggesting that A. oxycedri uses other mechanisms in addition to ballistic seed shooting as secondary dispersal agents to spread to distances greater than 20 m. Given that the seed characteristics facilitate dispersal by adhesion, we infer that spread between host individuals is amplified by seed transport by birds or small mammals.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainA/030244/10UnspecifiedUnspecifiedDesarrollo de estrategias de gestión y conservación de la biodiversidad en el sur del Ecuador: mitigación de los efectos del cambio climático y la deforestación
Government of SpainCGL2009-13190-C03-02Islas-EspacioUnspecifiedUnspecified
Madrid Regional GovernmentS2013/MAE-2719REMEDINAL3-CMUnspecifiedRestauración y conservación de los ecosistemas mediterráneos: respuesta frente al cambio global

More information

Item ID: 49520
DC Identifier: http://oa.upm.es/49520/
OAI Identifier: oai:oa.upm.es:49520
DOI: 10.1111/efp.12279
Official URL: http://onlinelibrary.wiley.com/doi/10.1111/efp.12279
Deposited by: Memoria Investigacion
Deposited on: 15 Mar 2018 09:23
Last Modified: 25 Mar 2019 15:46
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