Coexistence trend contingent to Mediterranean oaks with different leaf habits

Arianna Di Paola, Alain Paquette, Antonio Trabucco, Simone Mereu, Riccardo Valentini, Francesco Paparella

Research output: Contribution to journalArticle

Abstract

In a previous work we developed a mathematical model to explain the co-occurrence of evergreen and deciduous oak groups in the Mediterranean region, regarded as one of the distinctive features of Mediterranean biodiversity. The mathematical analysis showed that a stabilizing mechanism resulting from niche difference (i.e. different water use and water stress tolerance) between groups allows their coexistence at intermediate values of suitable soil water content. A simple formal derivation of the model expresses this hypothesis in a testable form linked uniquely to the actual evapotranspiration of forests community. In the present work we ascertain whether this simplified conclusion possesses some degree of explanatory power by comparing available data on oaks distributions and remotely sensed evapotranspiration (MODIS product) in a large-scale survey embracing the western Mediterranean area. Our findings confirmed the basic assumptions of model addressed on large scale, but also revealed asymmetric responses to water use and water stress tolerance between evergreen and deciduous oaks that should be taken into account to increase the understating of species interactions and, ultimately, improve the modeling capacity to explain co-occurrence.

Original languageEnglish (US)
Pages (from-to)3006-3015
Number of pages10
JournalEcology and Evolution
Volume7
Issue number9
DOIs
StatePublished - May 2017

Keywords

  • Mediterranean diversity
  • Quercus spp.
  • coexistence model
  • complementarity
  • evapotranspiration
  • niches partitioning
  • species distributions

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

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