Survival ofUlex europaeusseeds in the soil at three sites in New Zealand
| Autor: | R. L. Hill, A. H. Gourlay, R. J. Barker |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | New Zealand Journal of Botany. 39:235-244 |
| ISSN: | 1175-8643 0028-825X |
| DOI: | 10.1080/0028825x.2001.9512734 |
| Popis: | Seed banks are a major factor in the persistence of perennial, woody, leguminous weed species. The longevity of seeds of Ulex europaeus, (gorse) in the soil at three sites was determined, and the implications of these results for the selection of biological control agents for the weed are discussed. Loca11y co11ected seeds were buried in bags at depths ranging from 2.5 cm to 15 cm at three climatically distinct sites. Seeds were recovered and germinated over a 10‐year period to estimate the dormancy characteristics and viability of U. europaeus seed banks at the three sites. The decline in the seed bank conformed to a linear model using an exponential transformation. Seeds survived longer when buried deeper, but this influence was weak. The main determinant of seed survival was the time elapsed since burial. Results indicate that the dynamics of the seed bank vary from site to site. Thus, the view that U. europaeus seeds last almost indefinitely in the seed bank may be exaggerated9 at least in So... |
| Databáze: | OpenAIRE |
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