Woody Species as Landscape Modulators and Their Effect on Biodiversity Patterns

Shachak, Moshe; Boeken, Bertrand; Groner, Elli; Kadmon, Ronen; Lubin, Yael; Meron, Ehud; Ne’eman, Gidi; Perevolotsky, Avi; Shkedy, Yehoshua; Ungar, Eugene D.

doi:10.1641/b580307

Cited by 113 publications

(126 citation statements)

References 55 publications

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“…Coexistence of shrubs and grasses within the same patterns has been observed in arid savannas (e.g., Cipriotti and Aguiar 2010;Meyer et al 2008), as well as in other arid ecosystems (e.g., Maestre et al 2003;Pugnaire and Luque 2001;Shachak et al 2008), usually classified as drylands or steppe, rather than savannas.…”

Section: Discussionsupporting

confidence: 57%

Complexity and coexistence in a simple spatial model for arid savanna ecosystems

Baudena

Rietkerk

2012

Theor Ecol

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Section: Discussionsupporting

confidence: 57%

Complexity and coexistence in a simple spatial model for arid savanna ecosystems

Baudena

Rietkerk

2012

Theor Ecol

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“…Hence, a suitable indicator for the degree of reversibility of a proximate discontinuous transition should reflect both these characteristics. In line with previous studies by Shachak et al (1998Shachak et al ( , 2008 and Gilad et al (2004Gilad et al ( , 2007a, a possible indicator of reversibility could be an "infiltration ratio," meaning the ratio between the infiltration rate in a vegetation patch and the calculated infiltration rate if the patch was bare (but with soil and surface water still being in the same equilibrium; see Fig. 6 in Appendix 3).…”

Section: Discussionsupporting

confidence: 55%

Bistability and regular spatial patterns in arid ecosystems

Kéfi

Eppinga

Ruiter³

et al. 2010

Theor Ecol

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A variety of patterns observed in ecosystems can be explained by resource-concentration mechanisms. A resource-concentration mechanism occurs when organisms increase the lateral flow of a resource toward them, leading to a local concentration of this resource and to its depletion from areas farther away. In resource-concentration systems, it has been proposed that certain spatial patterns could indicate proximity to discontinuous transitions where an ecosystem abruptly shifts from one stable state to another. Here, we test this hypothesis using a model of vegetation dynamics in arid ecosystems. In this model, a resourceconcentration mechanism drives a positive feedback between vegetation and soil water availability. We derived the conditions leading to bistability and pattern formation. Our analysis revealed that bistability and regular pattern formation are linked in our model. This means that, when regular vegetation patterns occur, they indicate that the system is along a discontinuous transition to desertification. Yet, in real systems, only observing regular vegetation patterns without identifying the pattern-driving mechanism might not be enough to conclude that an ecosystem is along a discontinuous transition because similar patterns can emerge from different ecological mechanisms.

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“…As the system becomes more arid, the engineer's patch area becomes smaller and the water uptake decreases significantly. The infiltration rate at the reduced patch area, however, decreases only slightly because of its weak biomass dependence for b 1 q (see Eq. (2.6).…”

Section: Ecosystem Engineering Along a Rainfall Gradientmentioning

confidence: 99%

“…Landscapes in arid and semi-arid regions are mosaics of vegetation patches that differ in biomass production, resource concentration, and species richness [1]. Understanding the dynamics of such landscapes under various environmental conditions is highly significant for assessing the likelihood 1 E-mail: ehud@bgu.ac.il engineers (section 4.…”

Section: Introductionmentioning

confidence: 99%

Modeling Dryland Landscapes

Meron

2010

Math. Model. Nat. Phenom.

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Abstract. The discovery of nearly periodic vegetation patterns in arid and semi-arid regions motivated numerous model studies in the past decade. Most studies have focused on vegetation pattern formation, and on the response of vegetation patterns to gradients of the limiting water resource. The reciprocal question, what resource modifications are induced by vegetation pattern formation, which is essential to the understanding of dryland landscapes, has hardly been addressed. This paper is a synthetic review of model studies that address this question and the consequent implications for inter-specific plant interactions and species diversity. It focuses both on patch and landscape scales, highlighting bottom-up processes, where plant interactions at the patch scale give rise to spatial patterns at the landscape scale, and top-down processes, where pattern transitions at the landscape scale affect inter-specific interactions at the patch scale.

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Woody Species as Landscape Modulators and Their Effect on Biodiversity Patterns

Cited by 113 publications

References 55 publications

Complexity and coexistence in a simple spatial model for arid savanna ecosystems

Complexity and coexistence in a simple spatial model for arid savanna ecosystems

Bistability and regular spatial patterns in arid ecosystems

Modeling Dryland Landscapes

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