EFFECTS OF PRE-EXISTING SUBMERSED MACROPHYTES ON THE INVASION SUCCESS OF HYDRILLA VERTICILLATA

dc.contributor.advisorEngelhardt, Katharinaen_US
dc.contributor.authorChadwell, Todd Byronen_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2004-08-27T05:20:05Z
dc.date.available2004-08-27T05:20:05Z
dc.date.issued2004-07-06en_US
dc.description.abstractI evaluated (1) the effects of a native submersed aquatic plant species, <i>Vallisneria americana<i>, on the colonization success of a non-native and highly invasive submersed aquatic species, <i>Hydrilla verticillata<i>, through field and greenhouse experiments; and (2) the effects of <i>H. verticillata<i> propagule density on its colonization success of patches dominated by the native species. Results of the field study, located in a tidal freshwater region of Chesapeake Bay, suggest that pre-existing vegetation did not have significant negative effects on <i>H. verticillata<i> colonization. However, pre-existing <i>H. verticillata<i> biomass and <i>H. verticillata<i> colonization success were strongly correlated. In contrast, results from the greenhouse study showed that <i>V. americana<i> had a strong inhibitory effect on <i>H. verticillata<i> colonization by fragments and increasing <i>H. verticillata<i> fragment density again increased colonization success. Reduced water column nutrient concentrations, resulting from <i>V. americana<i> growth, appeared to negatively affect successful rooting and subsequent colonization by <i>H. verticillata<i>.en_US
dc.format.extent845638 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/1722
dc.language.isoen_US
dc.subject.pqcontrolledBiology, Ecologyen_US
dc.subject.pquncontrolledcolonizationen_US
dc.subject.pquncontrolledinvasive speciesen_US
dc.subject.pquncontrolledHydrilla verticillataen_US
dc.subject.pquncontrolledpriority effecten_US
dc.subject.pquncontrolledsubmersed macrophyteen_US
dc.subject.pquncontrolledVallisneria americanaen_US
dc.titleEFFECTS OF PRE-EXISTING SUBMERSED MACROPHYTES ON THE INVASION SUCCESS OF HYDRILLA VERTICILLATAen_US
dc.typeThesisen_US

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