• Login
    View Item 
    •   Repository Home
    • Research Papers
    • School of Natural Resources and Environmental Studies
    • Department of Environmental Studies
    • View Item
    •   Repository Home
    • Research Papers
    • School of Natural Resources and Environmental Studies
    • Department of Environmental Studies
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Comparative performance of invasive alien Eichhornia crassipes and native Ludwigia stolonifera under non-limiting nutrient conditions in Lake Naivasha, Kenya

    Thumbnail
    View/Open
    Comparative performance of invasive alien Eichhornia.pdf (306.0Kb)
    Date
    2010-09
    Author
    Njambuya, Josephine
    Triest, Ludwig
    Metadata
    Show full item record
    Abstract
    The ability of Ludwigia stolonifera to thrive in the presence of Eichhornia crassipes was investigated in Lake Naivasha, Kenya. L. stolonifera (indigenous) and E. crassipes (invasive alien) were grown in outdoor experimental boxes in monocultures and mixtures under non-limiting nutrient conditions. An additive series design with eight combinations of planting densities and four replicates was used. Competitive interactions between the two species were determined by assessing the final total biomass and above–below-ground biomass allocation after 98 days of growth. Biomass accumulation and allocation were significantly affected by competition in relation to species, with L. stolonifera accumulating more biomass than E. crassipes. ANOVA analysis indicated that there was no significant difference in Relative Growth Rate (RGR) and root/shoot ratio between monocultures and mixtures with E. crassipes. However, significant differences in RGRs were observed between monocultures and mixtures of L. stolonifera. Multiple regressions on species RGRs revealed that increasing initial biomass of a conspecific neighbour resulted to a greater reduction in species RGR in relation to increasing initial biomass of a hetero-specific neighbour. Thus, a stronger intrathan inter-specific competition coupled with the significantly higher RGR of L. stolonifera relative to that of E. crassipes enabled L. stolonifera to outperform E. crassipes
    URI
    http://karuspace.karu.ac.ke/handle/20.500.12092/1942
    Collections
    • Department of Environmental Studies [29]

    Karatina University copyright © 2017-2019  | Powered by DSpace
    Contact Us | Send Feedback | OAI-PMH Compliant
    Theme by Systems Librarian
      

     

    Browse

    All of RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Karatina University copyright © 2017-2019  | Powered by DSpace
    Contact Us | Send Feedback | OAI-PMH Compliant
    Theme by Systems Librarian