Skip to main content Accessibility help
×
Home

Three seedling emergence methods in soil seed bank studies: implications for interpretation of propagule deposition in riparian zones

  • Angela Gurnell (a1), Joanne Goodson (a1), Ken Thompson (a2), Owen Mountford (a3) and Nick Clifford (a4)...

Abstract

Samples of soil and recently deposited sediments were collected from the river bed, bank face and bank tops of two lengths (reaches) of the River Frome, Dorset, UK and one reach of the River Tern, Shropshire, UK. Soil propagule bank samples were collected in May 2003, and depositional samples were collected subsequently over four consecutive 4-month periods between June 2003 and October 2004. The samples were subjected to three emergence trials under drained, waterlogged and submerged conditions. Significantly more seedlings germinated in the drained than waterlogged trial, and waterlogged than submerged trials. Drained, waterlogged and submerged trials identified 186, 76 and 37 species, respectively. Six species identified in the waterlogged trials were not identified in the drained trials, and five species in the submerged trials were not found in the drained trials. Submerged trials added two species to the drained and waterlogged results. Application of detrended correspondence analysis (DCA) to average species abundance data, for the sampled hydrological habitats (bed, bank face, bank top) within the soil propagule bank and four depositional data sets, generated different results for the three trials. The drained treatment revealed significant differences between sites, seasons and hydrological habitats, whereas the waterlogged and submerged treatments presented an increasingly homogeneous view of the samples. Our results confirm other propagule bank emergence comparisons and extend them to depositional samples, demonstrating that the strong environmental sieves imposed by waterlogging and submergence restrict emergence of numerous terrestrial, wetland and even some aquatic species that were successfully identified using the drained conditions.

Copyright

Corresponding author

*Correspondence Fax: 020 7848 1319 Email: angela.gurnell@kcl.ac.uk

References

Hide All
Abernethy, V.J.andWillby, N.J. (1999) Changes along a disturbance gradient in the density and composition of propagule banks in floodplain aquatic habitats. Plant Ecology 140, 177190.
Andersson, E., Nilsson, C.andJohansson, M.E. (2000) Effects of river fragmentation on plant dispersal and riparian flora. Regulated Rivers: Research and Management 16, 8389.
Baldwin, A.H., Egnotovich, M.S.andClarke, E. (2001) Hydrologic change and vegetation of tidal freshwater marshes: field, greenhouse, and seed-bank experiments. Wetlands 21, 519531.
Boedeltje, G., ter Heerdt, G.N.J.andBakker, J.P. (2002) Applying the seedling-emergence method under waterlogged conditions to detect the seed bank of aquatic plants in submerged sediments. Aquatic Botany 72, 121128.
Capon, S.J.andBrock, M.A. (2006) Flooding, soil seed bank dynamics and vegetation resilience of a hydrologically variable desert floodplain. Freshwater Biology 51, 206223.
Goodson, J.M., Gurnell, A.M., Angold, P.G.andMorrissey, I.P. (2003) Evidence for hydrochory and the deposition of viable seeds within winter flow-deposited sediments: The River Dove, Derbyshire, UK. River Research and Applications 19, 317334.
Gurnell, A.M.andMidgley, P. (1994) Aquatic weed growth and flow resistance: their influence on the relationship between discharge and stage over a 25 year river gauging station record. Hydrological Processes 8, 6373.
Gurnell, A.M., van Oosterhout, M.P., de Vlieger, B.andGoodson, J.M. (2006) Reach-scale interactions between aquatic plants and physical habitat: River Frome, Dorset. River Research and Applications 22, 667680.
Gurnell, A.M., Goodson, J., Thompson, K., Clifford, N. andArmitage, P. (2007) The river bed: a dynamic store for plant propagules? Earth Surface Processes and Landforms 32 (in press).
Haukos, D.A.andSmith, L.M. (2001) Temporal emergence patterns of seedlings from Playa wetlands. Wetlands 21, 274280.
Hubbard, C.E. (1992) Grasses: A guide to their structure, identification, uses and distribution in the British Isles. (new edition, revised by J.C.E. Hubbard). London, Penguin.
Hill, M.O.andGauch, H.G. (1980) Detrended correspondence analysis: an improved ordination technique. Vegetatio 42, 4758.
Keddy, P.A.andReznicek, A.A. (1982) The role of seed banks in the persistence of Ontario coastal plain flora. American Journal of Botany 69, 1322.
Leck, M.A. (1996) Germination of macrophytes from a Delaware River tidal freshwater wetland. Bulletin of the Torrey Botanical Club 123, 4867.
Leck, M.A.andSchutz, W. (2005) Regeneration of Cyperaceae, with particular reference to seed ecology and seed banks. Perspectives in Plant Ecology, Evolution and Systematics 7, 95133.
Leck, M.A.andSimpson, R.L. (1995) Ten-year seed bank and vegetation dynamics of a tidal freshwater marsh. American Journal of Botany 82, 15471557.
MacKay, D.B. (1972) The measurement of viability. pp. 172208in Roberts, E.H. (Ed.) Viability of seeds. London, Chapman & Hall.
Rose, F. (1981) The wild flower key: British Isles–N.W. Europe. London, Frederick Warne.
Stace, C. (1999) Field flora of the British Isles. Cambridge, Cambridge University Press.
Tabacchi, E., Planty-Tabacchi, A.M., Roques, L.andNadal, E. (2005) Seed inputs in riparian zones: Implications for plant invasion. River Research and Applications 21, 299313.
Ter Braak, C.J.F.andSmilauer, P. (2002) CANOCO reference manual. Biometris, Wageningen and Ceske Budejovice, Biometris.
Thompson, K., Bakker, J.andBekker, J. (1997) The soil seed banks of North West Europe: Methodology, density and longevity. Cambridge, Cambridge University Press.
Van der Valk, A.G. (1981) Succession in wetlands: a Gleasonian approach. Ecology 62, 688696.
Van der Valk, A.G.andDavis, C.B. (1978) Role of seed banks in vegetation dynamics of prairie glacial marshes. Ecology 59, 322335.

Keywords

Three seedling emergence methods in soil seed bank studies: implications for interpretation of propagule deposition in riparian zones

  • Angela Gurnell (a1), Joanne Goodson (a1), Ken Thompson (a2), Owen Mountford (a3) and Nick Clifford (a4)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed