Landscape Ecology

, Volume 21, Issue 8, pp 1195–1205

Interactions between plant life span, seed dispersal capacity and fecundity determine metapopulation viability in a dynamic landscape

Authors

    • Terrestrial Ecology Unit, Department of BiologyUniversity of Ghent
  • Olivier Honnay
    • Division of Plant Systematics and Ecology, Department of BiologyKULeuven
Research Article

DOI: 10.1007/s10980-006-0016-9

Cite this article as:
Bossuyt, B. & Honnay, O. Landscape Ecol (2006) 21: 1195. doi:10.1007/s10980-006-0016-9

Abstract

Classical metapopulation models do not account for temporal changes in the suitability of habitat patches. In reality, however, the carrying capacity of most habitat types is not constant in time due to natural succession processes. In this study, we modeled plant metapopulation persistence in a successional landscape with disappearing and emerging habitat patches, based on a realistic dune slack landscape at the Belgian–French coast. We focused on the effects of the variation of different plant traits on metapopulation persistence in this changing landscape. Therefore, we used a stage based stochastic metapopulation model implemented in RAMAS/Metapop, simulating a large variation in plant traits but keeping landscape characteristics such as patch turnover rate and patch lifespan constant. The results confirm the conclusions of earlier modeling work that seed dispersal distance and seed emigration rate both have an important effect on metapopulation persistence. We also found that high population growth rate or high recruitment considerably decreased the extinction risk of the metapopulation. Additionally, a long plant life span had a strong positive effect on metapopulation persistence, irrespective of the plant's dispersal capacity and population growth rate. Plant species that invest in life span require less investment in offspring and dispersal capacity to avoid extinction, even in dynamic landscapes with deterministic changes in habitat quality. Moreover, metapopulations of long-lived plant species were found to be much less sensitive to high levels of environmental stochasticity than short-lived species.

Keywords

Clonality Extinction risk Population growth rate RAMAS/Metapop Seed dispersal Stage structured model

Copyright information

© Springer 2006