Login

Hydrotheek

Record nummer 2223976
Titel artikel Modeling invasive alien plant species in river systems: interaction with native ecosystem engineers and effects on hydro-morphodynamic processes
Auteur(s) Oorschot, M. van ; Kleinhans, M.G. ; Geerling, G.W. ; Egger, G. ; Leuven, R.S.E.W. ; Middelkoop, H.
Tijdschrifttitel Water resources research
Deel(Jaar)Nummer 53(2017)8
Paginering 6945 - 6969
Online full text
Publicatie type Artikel
Taal Engels
Toelichting De Japanse Duizendknoop is een plant die ruim anderhalve eeuw geleden als sierplant naar Nederland is gehaald, en nu door zijn massale verspreiding voor veel problemen zorgt. De modelresultaten laten zien dat deze plant de natuurlijke oeverplanten wegconcurreert. Zijn dichtere begroeiing houdt het water beter tegen dan typische Nederlandse oeverplanten zoals wilgen en populieren. Daardoor stroomt de rivier langzamer, en wordt de waterstand nog hoger bij hoogwater. Dit zorgt voor meer risico op overstroming in de zomer en herfst, als de Japanse Duizendknoop op zijn grootst is.
Toelichting (Engels) Invasive alien plant species negatively impact native plant communities by out-competing species or changing abiotic and biotic conditions in their introduced range. River systems are especially vulnerable to biological invasions, because waterways can function as invasion corridors. Understanding interactions of invasive and native species and their combined effects on river dynamics is essential for developing cost-effective management strategies. However, numerical models for simulating long-term effects of these processes are lacking. This paper investigates how an invasive alien plant species affects native riparian vegetation and hydro-morphodynamics. A morphodynamic model has been coupled to a dynamic vegetation model that predicts establishment, growth and mortality of riparian trees. We introduced an invasive alien species with life-history traits based on Japanese Knotweed (Fallopia japonica), and investigated effects of low- and high propagule pressure on invasion speed, native vegetation and hydro-morphodynamic processes. Results show that high propagule pressure leads to a decline in native species cover due to competition and the creation of unfavorable native colonization sites. With low propagule pressure the invader facilitates native seedling survival by creating favorable hydro-morphodynamic conditions at colonization sites. With high invader abundance, water levels are raised and sediment transport is reduced during the growing season. In winter, when the above-ground invader biomass is gone, results are reversed and the floodplain is more prone to erosion. Invasion effects thus depend on seasonal above- and below ground dynamic vegetation properties and persistence of the invader, on the characteristics of native species it replaces, and the combined interactions with hydro-morphodynamics.
Betrokken instanties Universiteit Utrecht
Deltares
Radboud Universiteit
Reacties
Er zijn nog geen reacties. U kunt de eerste schrijven!
Schrijf een reactie

To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. A discount of 100% means that (after approval) the author does not have to pay Article Processing Charges.

For the approval of an Open Access deal for an article, the corresponding author of this article must be affiliated with Wageningen University & Research.