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Sediment availability provokes a shift from Brownian to Lévy‐like clonal expansion in a dune building grass
Reijers, V.C; Hoeks, S.; van Belzen, J.; Siteur, K.; de Rond, A.J.A.; van de Ven, C.N.; Lammers, C.; van de Koppel, J.; van der Heide, T. (2021). Sediment availability provokes a shift from Brownian to Lévy‐like clonal expansion in a dune building grass. Ecol. Lett. 24(2): 258-268.

Additional data:
In: Ecology Letters. Blackwell: Oxford. ISSN 1461-023X; e-ISSN 1461-0248, more
Peer reviewed article  

Available in  Authors 

    Ammophila arenaria (L.) Link [WoRMS]
Author keywords
    Ammophila arenaria; biogeomorphic landscapes; clonal expansion; coastal dunes; engineering traits; habitat modification; Levy movement

Authors  Top 
  • Reijers, V.C, more
  • Hoeks, S.
  • van Belzen, J., more
  • Siteur, K., more
  • de Rond, A.J.A.
  • van de Ven, C.N., more
  • Lammers, C., more
  • van de Koppel, J., more
  • van der Heide, T., more

    In biogeomorphic landscapes, plant traits can steer landscape development through plant-mediated feedback interactions. Interspecific differences in clonal expansion strategy can therefore lead to the emergence of different landscape organisations. Yet, whether landscape-forming plants adopt different clonal expansion strategies depending on their physical environment remains to be tested. Here, we use a field survey and a complementary mesocosm approach to investigate whether sediment deposition affects the clonal expansion strategy employed by dune-building marram grass individuals. Our results reveal a consistent shift in expansion pattern from more clumped, Brownian-like, movement in sediment-poor conditions, to patchier, Levy-like, movement under high sediment supply rates. Additional model simulations illustrate that the sediment-dependent shift in movement strategies induces a shift in optimisation of the cost-benefit relation between landscape engineering (i.e. dune formation) and expansion. Plasticity in expansion strategy may therefore allow landscape-forming plants to optimise their engineering ability depending on their physical landscape.

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