Abstract
Rivers are vulnerable to biological invasion due to hydrologic connectivity, which facilitates post-entry movement of aquatic plant propagules by water currents. Ecological and watershed factors may influence spatial and temporal dispersal patterns. Field-based data on dispersal could improve risk assessment models and management responses. Ludwigia hexapetala, an invasive emergent macrophyte, provides a case study for understanding dispersal patterns throughout a watershed. The species spreads via hydrochory and is increasingly imposing detrimental ecological and economic impacts within watersheds of the United States and Europe. We investigated morphology of shoot fragments and their dispersal in the Russian River watershed of California, capturing shoot fragments of L. hexapetala during repeated summer surveys at five locations in the river and quantifying their morphological traits that predict establishment success. Highly variable capture counts suggest the importance of pulse disturbance events in local dispersal of L. hexapetala. Unexpectedly, dispersing propagule pressure was nonlinear, with more shoot fragments captured in the middle rather than lower river. Captured fragments in the middle river were twice the length of fragments captured in the lower river and bore 83% more stem nodes, characteristics associated with greater establishment success. Our results support development of spatially targeted management, outreach, and prevention efforts that could lead to decreased propagule pressure in the watershed.
Similar content being viewed by others
References
Boedeltje G, Bakker JP, Bekker RM, Van Groenendael JM, Soesbergen M (2003) Plant dispersal in a lowland stream in relation to occurrence and three specific life-history traits of the species in the species pool. J Ecol 91:855–866. https://doi.org/10.1046/j.1365-2745.2003.00820.x
Bonte D, Dahirel M (2017) Dispersal: a central and independent trait in life history. Oikos 126:472–479. https://doi.org/10.1111/oik.03801
Catford JA, Naiman RJ, Chambers LE, Roberts J, Douglas M, Davies P (2013) Predicting novel riparian ecosystems in a changing climate. Ecosystems 16:382–400. https://doi.org/10.1007/s10021-012-9566-7
Colautti RI, Grigorovich IA, MacIsaac HJ (2006) Propagule pressure: a null model for biological invasions. Biol Invasions 8:1023–1037. https://doi.org/10.1007/s10530-005-3735-y
Coutts SR, van Klinken RD, Yokomizo H, Buckley YM (2011) What are the key drivers of spread in invasive plants: dispersal, demography or landscape: and how can we use this knowledge to aid management? Biol Invasions 13:1649–1661. https://doi.org/10.1007/s10530-010-9922-5
DiVittorio CT, Corbin JD, D’Antonio CM (2007) Spatial and temporal patterns of seed dispersal: an important determinant of grassland invasion. Ecol Appl 17:311–316. https://doi.org/10.1890/06-0610
Dong B-C, Liu R-H, Zhang Q, Li H-L, Zhang M-X, Lei G-C, Yu F-H (2011) Burial depth and stolon internode length independently affect survival of small clonal fragments. PLoS ONE 6:e23942. https://doi.org/10.1371/journal.pone.0023942
Gillard M, Grewell BJ, Deleu C, Thiébaut G (2017) Climate warming and water primroses: germination responses of populations from two invaded ranges. Aquat Bot 136:155–163. https://doi.org/10.1016/j.aquabot.2016.10.001
Glover R, Drenovsky RE, Futrell CJ, Grewell BJ (2015) Clonal integration in Ludwigia hexapetala under different light regimes. Aquat Bot 122:40–46. https://doi.org/10.1016/j.aquabot.2015.01.004
Grewell BJ, Netherland MD, Skaer Thomason MJ (2016a) Establishing research and management priorities for invasive water primroses (Ludwigia spp.). ERDC/EL TR-16-2. US Army Corps of Engineers Research and Development Center, Environmental Laboratory, Vicksburg
Grewell BJ, Skaer Thomason MJ, Futrell CJ, Iannucci M, Drenovsky RE (2016b) Trait responses of invasive aquatic macrophyte congeners: colonizing diploid outperforms polyploid. AoB Plants 8:plw014. https://doi.org/10.1093/aobpla/plw014
Haury J, Druel A, Cabral T, Paulet Y, Bozec M, Coudreuse J (2014) Which adaptations of some invasive Ludwigia spp. (Rosidae, Onagraceae) populations occur in contrasting hydrological conditions in western France? Hydrobiologia 737:45–56. https://doi.org/10.1007/s10750-014-1815-7
Levine JM, Murrell DJ (2003) The community-level consequences of seed dispersal patterns. Annu Rev Ecol Evol Syst 34:549–574. https://doi.org/10.1146/annurev.ecolsys.34.011802.132400
Li X, Shen Y, Huang Q, Fan Z, Huang D (2013) Regeneration capacity of small clonal fragments of the invasive Mikania micrantha H.B.K.: effects of burial depth and stolon internode length. PLoS ONE 8:e84657. https://doi.org/10.1371/journal.pone.0084657
Lin H-F, Alpert P, Yu F-H (2012) Effects of fragment size and water depth on performance of stem fragments of the invasive, amphibious, clonal plant Ipomoea aquatica. Aquat Bot 99:34–40. https://doi.org/10.1016/j.aquabot.2012.01.004
Liu S-H, Hoch PC, Diazgranados M, Raven PH, Barber JC (2017) Multi-locus phylogeny of Ludwigia (Onagraceae): insights on infra-generic relationships and the current classification of the genus. Taxon 66:1112–1127. https://doi.org/10.12705/665.7
Lockwood JL, Cassey P, Blackburn T (2005) The role of propagule pressure in explaining species invasions. Trends Ecol Evol 20:223–228. https://doi.org/10.1016/j.tree.2005.02.004
Manning DJ, Mann JA, White SK, Chase SD, Benkert RC (2005) Steelhead emigration in a seasonal impoundment created by an inflatable rubber dam. North Am J Fish Manag 25:1239–1255. https://doi.org/10.1577/M04-103.1
Merritt DM, Wohl EE (2002) Processes governing hydrochory along rivers: hydraulics, hydrology, and dispersal phenology. Ecol Appl 12:1071–1087. https://doi.org/10.1890/1051-0761(2002)012[1071:PGHARH]2.0.CO;2
Meyerson LA, Pyšek P (2013) Manipulating alien plant species propagule pressure as a prevention strategy for protected areas. In: Foxcroft LC, Pyšek P, Richardson DM, Genovesi P (eds) Plant invasions in protected areas. Springer, Dordrecht, pp 473–486
Nelson N (1944) A photometric adaptation of the Somogyi method for determination of glucose. J Biol Chem 153:375–380
Nilsson C, Brown RL, Jansson R, Merritt DM (2010) The role of hydrochory in structuring riparian and wetland vegetation. Biol Rev Camb Philos Soc 85:837–858. https://doi.org/10.1111/j.1469-185X.2010.00129.x
Okada M, Grewell BJ, Jasieniuk M (2009) Clonal spread of invasive Ludwigia hexapetala and L. grandiflora in freshwater wetlands of California. Aquat Bot 91:123–129. https://doi.org/10.1016/j.aquabot.2009.03.006
Parry HR, Sadler RJ, Kriticos DJ (2013) Practical guidelines for modeling post-entry spread in invasion ecology. NeoBiota 18:41–66. https://doi.org/10.3897/neobiota.18.4305
Pollen-Bankhead N, Thomas RE, Gurnell AM, Liffen T, Simon A, O’Hare MT (2011) Quantifying the potential for flow to remove the emergent aquatic macrophyte Sparganium erectum from the margins of low-energy rivers. Ecol Eng 37:1779–1788. https://doi.org/10.1016/j.ecoleng.2011.06.027
Pyšek P, Prach K (1993) Plant invasions and the role of riparian habitats: a comparison of four species alien to central Europe. J Biogeogr 20:413–420. https://doi.org/10.2307/2845589
Redekop P, Hofstra D, Hussner A (2016) Elodea canadensis shows a higher dispersal capacity via fragmentation than Egeria densa and Lagarosiphon major. Aquat Bot 130:45–49. https://doi.org/10.1016/j.aquabot.2016.01.004
Rejmanková E (1992) Ecology of creeping macrophytes with special reference to Ludwigia peploides (H.B.K.) Raven. Aquat Bot 43:283–299
Riis T, Sand-Jensen K (2006) Dispersal of plant fragments in small streams. Freshw Biol 51:274–286. https://doi.org/10.1111/j.1365-2427.2005.01496.x
Riis T, Madsen TV, Sennels RSH (2009) Regeneration, colonisation and growth rates of allofragments in four common stream plants. Aquat Bot 90:209–212. https://doi.org/10.1016/j.aquabot.2008.08.005
Ruaux B, Greulich S, Haury J, Berton J-P (2009) Sexual reproduction of two alien invasive Ludwigia (Onagraceae) on the middle Loire River, France. Aquat Bot 90:143–148. https://doi.org/10.1016/j.aquabot.2008.08.003
Schneider RL, Sharitz RR (1988) Hydrochory and regeneration in a bald cypress-water tupelo swamp forest. Ecology 69:1055–1063. https://doi.org/10.2307/1941261
Soomers H, Winkel DN, Du Y, Wassen MJ (2010) The dispersal and deposition of hydrochorous plant seeds in drainage ditches. Freshw Biol 55:2032–2046. https://doi.org/10.1111/j.1365-2427.2010.02460.x
Suzuki J-I, Stuefer J (1999) On the ecological and evolutionary significance of storage in clonal plants. Plant Species Biol 14:11–17. https://doi.org/10.1046/j.1442-1984.1999.00002.x
Swank JC, Below FE, Lambert RJ, Hageman RH (1982) Interaction of carbon and nitrogen metabolism in the productivity of maize. Plant Physiol 70:1185–1190. https://doi.org/10.1104/pp.70.4.1185
Thébaud C, Debussche M (1991) Rapid invasion of Fraxinus ornus L. along the Hérault River system in southern France: the importance of seed dispersal by water. J Biogeogr 18:7–12. https://doi.org/10.2307/2845240
Thomas JR, Gibson DJ, Middleton BA (2005) Water dispersal of vegetative bulbils of the invasive exotic Dioscorea oppositifolia L. in southern Illinois. J Torrey Bot Soc 132:187–196
Thouvenot L, Haury J, Thiébaut G (2012) Responses of two invasive macrophyte species to salt. Hydrobiologia 686:213–223. https://doi.org/10.1007/s10750-012-1013-4
Thouvenot L, Haury J, Thiebaut G (2013a) A success story: water primroses, aquatic plant pests. Aquat Conserv Mar Freshw Ecosyst 23:790–803. https://doi.org/10.1002/aqc.2387
Thouvenot L, Haury J, Thiebaut G (2013b) Seasonal plasticity of Ludwigia grandiflora under light and water depth gradients: an outdoor mesocosm experiment. Flora 208:430–437
US Geological Survey (2017) National Water Information System. https://waterdata.usgs.gov/nwis
van Leeuwen CHA, Sarneel JM, van Paassen J, Rip WJ, Bakker ES (2014) Hydrology, shore morphology and species traits affect seed dispersal, germination and community assembly in shoreline plant communities. J Ecol 102:998–1007. https://doi.org/10.1111/1365-2745.12250
Wagner WL, Hoch PC, Raven PH (2007) Revised classification of the Onagraceae. Syst Bot Monogr 83:1–240
Warren RJ, Ursell T, Keiser AD, Bradford MA (2013) Habitat, dispersal and propagule pressure control exotic plant infilling within an invaded range. Ecosphere 4:1–12. https://doi.org/10.1890/ES12-00393.1
Wilson JRU, Dormontt EE, Prentis PJ, Lowe AJ, Richardson DM (2009) Something in the way you move: dispersal pathways affect invasion success. Trends Ecol Evol 24:136–144. https://doi.org/10.1016/j.tree.2008.10.007
You W-H, Han C-M, Fang L-X, Du D-L (2016) Propagule pressure, habitat conditions and clonal integration influence the establishment and growth of an invasive clonal plant, Alternanthera philoxeroides. Front Plant Sci 7:568. https://doi.org/10.3389/fpls.2016.00568
Acknowledgements
This research was supported by the US Army Corps of Engineers, Engineer Research and Development Center, Aquatic Plant Control Research Program, Vicksburg, Mississippi, USA. M. Skaer Thomason received support from the USDA-ARS Pathways program for graduate student development, and a subsequent USDA post-doctoral appointment. We thank Rebecca Drenovsky, Eric Wolanski and anonymous reviewers for comments that improved the manuscript. We thank Caryn J. Futrell for chemical laboratory analyses, and Sonoma County Water Agency for technical input and access to sites. We thank Shannon Burke, Malia Forbert, Caryn J. Futrell, Alex Pluchino, and Rachel Stump for assistance in the field and laboratory.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Skaer Thomason, M.J., McCort, C.D., Netherland, M.D. et al. Temporal and nonlinear dispersal patterns of Ludwigia hexapetala in a regulated river. Wetlands Ecol Manage 26, 751–762 (2018). https://doi.org/10.1007/s11273-018-9605-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11273-018-9605-z