Biogenic crust dynamics on sand dunes.
Phys Rev E Stat Nonlin Soft Matter Phys
; 87(2): 020701, 2013 Feb.
Article
em En
| MEDLINE
| ID: mdl-23496449
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.
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Plantas
/
Modelos Moleculares
/
Coloides
/
Dióxido de Silício
/
Clima Desértico
/
Modelos Biológicos
/
Modelos Químicos
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article