Biogenic crust dynamics on sand dunes

Shai Kinast, Ehud Meron, Hezi Yizhaq, Yosef Ashkenazy

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Sand dunes are often covered by vegetation and biogenic crusts. Despite their significant role in dune stabilization, biogenic crusts have rarely been considered in model studies of dune dynamics. Using a simple model, we study the existence and stability ranges of different dune-cover states along gradients of rainfall and wind power. Two ranges of alternative stable states are identified: fixed crusted dunes and fixed vegetated dunes at low wind power; and fixed vegetated dunes and active dunes at high wind power. These results suggest a crossover between two different forms of desertification.

Original languageEnglish
Article number020701
JournalPhysical Review E
Volume87
Issue number2
DOIs
StatePublished - 25 Feb 2013

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