Om flydeevnen hos frugter af Ræve-Star (Carex vulpina) og skovengenes forsvinden i Danmark

Translated title of the contribution: On hydrochorous seed dispersal in Carex vulpina and the demise of forest meadows in Denmark

Hans Henrik Bruun

Research output: Contribution to specialist publication or newspaperSpecialist publication article

Abstract

The buoyancy of fruits (nutlets in utricles) of the marsh-inhabiting True
Fox Sedge (Carex vulpina) was tested experimentally in stagnant water.
Only 16 % of the seeds had sunk when the experiment was terminated
after 284 days. Seeds did not germinate while floating, but remained fully
viable (average 76 % germination for both floating and sunken seeds). For
comparison, fruits of the grassland species Small-fruited Prickly-sedge
(Carex muricata ssp. pairae) were treated similarly. Most of those seeds
had sunk after three days, with only 4 % still floating after 115 days. The
results suggest that regional dynamics of Carex vulpina may be dependent
on regular flooding of its habitats; and that the strong restrictions on
natural meadow hydrology – by forestry and agriculture – is one reason for
the rarity of the species.
Translated title of the contributionOn hydrochorous seed dispersal in Carex vulpina and the demise of forest meadows in Denmark
Original languageDanish
Pages73-76
Volume114
No.3-4
Specialist publicationFlora og Fauna
PublisherNaturhistorisk Forening for Jylland
Publication statusPublished - 2009

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Plant Ecology and Systematics (Closed 2011) (011004000)

Subject classification (UKÄ)

  • Ecology

Keywords

  • seed buoyancy
  • metapopulation dynamics
  • Flood meadow conservation

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