Seed bank dynamics of Mediterranean pastures subjected to mechanical disturbance

Seed bank dynamics of Mediterranean pastures subjected to mechanical disturbance Abstract. Vegetation and buried germinable seeds were examined in Mediterranean pastures differing both in time elapsed since last ploughing and in intensity of disturbance. Densities of buried germinable seeds in the greenhouse were determined from 10 × 10 × 3 cm soil cores taken during the autumn prior to the time of germination. Abundance of pasture species was recorded on the same sites during the following spring. The species composition of the seed bank was very similar to that of the vegetation: 80.9 % similarity (Sorensen's index). The number of species and density of buried seeds ready to germinate increased with suc‐cessional age from 0 to 4 yr and decreased later to a constant level after 9 yr. Regarding disturbance intensity, the highest species numbers are found at intermediate intensities while there is a drastic decrease at high disturbance intensity. The floristic composition of the seedbankwas analyzed through Correspondence Analysis (CA) and Binary Discriminant Analysis (BDA). Seed bank composition reflected both successional stage and intensity of disturbance. Characteristic species of both gradients were identified. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Vegetation Science Wiley

Seed bank dynamics of Mediterranean pastures subjected to mechanical disturbance

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Publisher
Wiley
Copyright
1990 IAVS ‐ the International Association of Vegetation Science
ISSN
1100-9233
eISSN
1654-1103
DOI
10.2307/3235709
Publisher site
See Article on Publisher Site

Abstract

Abstract. Vegetation and buried germinable seeds were examined in Mediterranean pastures differing both in time elapsed since last ploughing and in intensity of disturbance. Densities of buried germinable seeds in the greenhouse were determined from 10 × 10 × 3 cm soil cores taken during the autumn prior to the time of germination. Abundance of pasture species was recorded on the same sites during the following spring. The species composition of the seed bank was very similar to that of the vegetation: 80.9 % similarity (Sorensen's index). The number of species and density of buried seeds ready to germinate increased with suc‐cessional age from 0 to 4 yr and decreased later to a constant level after 9 yr. Regarding disturbance intensity, the highest species numbers are found at intermediate intensities while there is a drastic decrease at high disturbance intensity. The floristic composition of the seedbankwas analyzed through Correspondence Analysis (CA) and Binary Discriminant Analysis (BDA). Seed bank composition reflected both successional stage and intensity of disturbance. Characteristic species of both gradients were identified.

Journal

Journal of Vegetation ScienceWiley

Published: Jun 1, 1990

References

  • Composition and viability of the seed bank along a successional gradient in a Baltic sea shore meadow
    Jerling, Jerling
  • Soil seed banks
    Moore, Moore
  • Variation in structure and diversity in Mediterranean grasslands related to trophic status and grazing intensity
    Puerto, Puerto; Rico, Rico; Matias, Matias; Garcia, Garcia
  • Viable weed seeds in cultivated soils
    Roberts, Roberts

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