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Träfflista för sökning "WFRF:(Ozinga Wim A.) srt2:(2012-2014)"

Sökning: WFRF:(Ozinga Wim A.) > (2012-2014)

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1.
  • Bakker, Jan P., et al. (författare)
  • Long-term effects of scrub clearance and litter removal on the re-establishment of dry alvar grassland species
  • 2012
  • Ingår i: Annales Botanici Fennici. - 0003-3847 .- 1797-2442. ; 49:1-2, s. 21-30
  • Tidskriftsartikel (refereegranskat)abstract
    • Many characteristic dry alvar grassland species disappear after cessation of livestock grazing as a result of encroachment by Juniperus communis. We studied the re-establishment of these species after scrub clearance with and without the removal of the layer of litter and mosses in long-term (14 years) permanent plots. Most of the species belonging to the community species pool of dry alvar grassland species before clearance were found in permanent plots between 2 and 14 years after the clearance. A large part originated from vegetative spread of already occurring species in the established vegetation in the surroundings. Only a small part of the long-term persistent soil seed bank resulted in the re-establishment of alvar species. There was no significant difference in the traits soil seed bank, seed weight and long-distance dispersal by wind, dung or fur of animals of established and non-established species. Removal of litter and mosses positively affected the re-establishment of alvar species.
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2.
  • Bakker, Jan P., et al. (författare)
  • Shading results in depletion of the soil seed bank
  • 2014
  • Ingår i: Nordic Journal of Botany. - : Wiley. - 0107-055X .- 1756-1051. ; 32:5, s. 674-679
  • Tidskriftsartikel (refereegranskat)abstract
    • To what extent is the decline of characteristic dry alvar species related to the decline in the soil seed bank during scrub encroachment? We recorded the number of flower stems in the vegetation in relation to light attenuation along an encroachment series progressing from open alvar through small gaps inside dense scrub of Juniperus communis (cover of 60%) to intact dense scrub (cover of 100%) on the island of oland, Sweden. This measurement of potential reproduction (number of flower stems) was then compared to the number of species in the soil seed bank at each site along the alvar encroachment series. Scrub encroachment results in light attenuation between and under the shrubs. The total number of flower stems averaged over all species was similar between gaps and open alvar, but that of alvar species was significantly lower in the gaps, indicating that light attenuation could reduce their seed set. Shading in gaps is related to depletion of the soil seed bank and loss of alvar species, particularly those that do not form a persistent soil seed bank.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
Typ av innehåll
refereegranskat (2)
Författare/redaktör
Bakker, Jan P. (2)
Rosén, Eje (2)
Ozinga, Wim A. (2)
Bretfeld, Mario (1)
Feldt, Tobias (1)
Stahl, Julia (1)
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Hoffmann, Frank (1)
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Uppsala universitet (2)
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Engelska (2)
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Naturvetenskap (2)

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