Remnant shrubs in Mediterranean semi-arid steppes: effects of shrub size, abiotic factors and species identity on understorey richness and occurrence

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Ecosystem structure, function, and restoration success: Are they related? (2006, methodology): “We measured restorability as the probability of survival of planted Pistacia lentiscus L. seedlings, a keystone species in alpha grass steppes (Maestre & Cortina 2005) which is commonly used in restoration programmes (Cortina et al. 2004).”
Impacts of shrub encroachment on ecosystem structure and functioning: towards a global synthesis (2011, background): “Increases in plant height and size may also promote a higher diversity of understorey plants because of the perch effect (Pausas et al. 2006) and the increase in habitat heterogeneity under shrub ⁄ tree canopies (Maestre & Cortina 2005).”
Positive effects of shrubs on plant species diversity do not change along a gradient in grazing pressure in an arid shrubland (2012, background): “…landscape patterns, as arid and emi-arid shrubs are known to act as nurse plants, improvng microclimatic conditions and increasing the diversity, iomass and stability of neighboring species (Holzapfel & ahall 1999; Maestre & Cortina 2005; Holzapfel et al. 2006; oliveres, Eldridge, et al. 2011).”