Journal article

Biogeographical comparison of the emergent macrophyte, Sagittaria platyphylla in its native and introduced ranges

Raelene M Kwong, Jean Louis Sagliocco, Nathan E Harms, Kym L Butler, Peter T Green, Grant D Martin



Understanding why some plant species become invasive is important to predict and prevent future weed threats and identify appropriate management strategies. Many hypotheses have been proposed to explain why plants become invasive, yet few studies have quantitatively compared plant and population parameters between native and introduced range populations to gain an objective perspective on the causes of plant invasion. The present study uses a biogeographical field survey to compare morphological and reproductive traits and abundance between the native range (USA) and two introduced ranges (Australia and South Africa) of Sagittaria platyphylla (Engelm.) J.G. Sm (Alismataceae), a highly invasi..

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University of Melbourne Researchers


Awarded by Rural Industries Research and Development Corporation

Funding Acknowledgements

We are grateful to the Rural Industries Research and Development Corporation (Project No. PJR-007053), Murrumbidgee Irrigation Ltd. and the Victorian Department of Economic Development, Jobs, Transport and Resources (formerly Department of Environment and Primary Industries) (Australia) for project funding. In the USA we thank Brian Keener from the University of West Alabama Herbarium for plant identification and staff from the U.S Department of Agriculture, U.S. Fish and Wildlife Service, Louisiana Department of Wildlife and Fisheries, Texas Parks and Wildlife and Tennessee State Government for assistance with research permits and in locating field sites. We appreciate the efforts of Megan Relf, Rebecca Grant and Troy Gallus and Sue Darby for field and laboratory assistance in Australia. We thank Alan Yen and two anonymous reviewers for helpful comments and suggestions regarding the manuscript.