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Publication Type J
Authors Archbald, G. and K. E. Boyer
Title Potential for Spread of Algerian Sea Lavender (Limonium ramosissimum subsp provinciale) in Tidal Marshes
Source Invasive Plant Science and Management
Author Keywords Dispersal germination halophyte inundation Jaumea life history transitions propagule pressure Salicornia salinity gradient transition zone san-francisco bay relative importance seed-germination salt marshes plant salinity disturbance diversity invasion establishment
Abstract We investigated the potential for an invasive sea lavender, Limonium ramosissimum subsp. provinciale (Algerian sea lavender; LIRA) to spread in San Francisco Estuary (SFE) tidal marshes by testing how two determinants of tidal marsh plant distribution, salinity and inundation, affect LIRA dispersal, germination, growth, and reproduction. Simulating dispersal in 0, 15, and 30 parts per thousand (ppt) salinity water, we found seeds remained afloat similarly regardless of salinity, and seed viability after floatation was high (88%); however, seeds in 0 ppt aquaria germinated after just 4 d, suggesting shorter dispersal distances in fresh than in brackish or saline water. Next, we compared LIRA and native halophyte seed germination in 0, 15, 30, and 45 ppt water. Percentage of germination was similar between species after 3 wk, but LIRA germinated faster in fresh water than all native species (90% vs. 5% germination after 4 d), suggesting a possible establishment advantage for LIRA at low salinities. Finally, we grew LIRA under crossed salinity and inundation levels in a tidal simulator for a growing season. LIRA growth and seed production increased when either salinity or inundation was reduced. We conclude that spread could be greatest among salt marshes due to high potential for seed dispersal in saline water, yet spread within marshes may be greatest in relatively lower salinity conditions where growth and reproduction are maximized
Author Address [Archbald, Gavin; Boyer, Katharyn E.] San Francisco State Univ, Romberg Tiburon Ctr Environm Studies, Tiburon, CA 94920 USA. [Archbald, Gavin; Boyer, Katharyn E.] San Francisco State Univ, Dept Biol, Tiburon, CA 94920 USA. Archbald, G (reprint author), HT Harvey & Associates, 983 Univ Ave Bldg, Los Gatos, CA 95032 USA. gavinarchbald@gmail.com
ISSN 1939-7291
ISBN 1939-7291
29-Character Source Abbreviation Invasive Plant Sci. Manag.
Publication Date Jul-Sep
Year Published 2014
Volume 7
Issue 3
Beginning Page 454-463
Digital Object Identifier (DOI) 10.1614/ipsm-d-13-00091.1
Unique Article Identifier WOS:000344911100007
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