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An experimental eva...
An experimental evaluation of the arctic fox (Alopex lagopus) as a seed disperser
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- Graae, Bente J. (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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Pagh, Sussi (författare)
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- Bruun, Hans Henrik (författare)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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(creator_code:org_t)
- 2004
- 2004
- Engelska.
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Ingår i: Arctic, Antarctic and Alpine Research. - 1938-4246 .- 1523-0430. ; 36:4, s. 468-473
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Abstract
Ämnesord
Stäng
- Arctic foxes are evaluated as seed dispersal vectors for Greenlandic plant species through a feeding experiment with subsequent scat analysis and germination test. Seeds of 22 common species with different morphology were tested. Passage time ranged between 4 and 48 hours. No significant differences was detected in passage time for seeds with different morphology. Cerastium alpinum and Stellaria longipes had higher germination after passage through the fox’ digestive tract as compared to controls. Sibbaldia procumbens, Oxyria digyna and Silene acaulis were favoured by passage when shorter than 10 hours. Salix glauca ssp. callicarpaea, Veronica alpina, Gnaphalium norvegicum, Papaver radicatum, Ranunculus hyperboreus, Chamaenerion latifolium, Luzula parviflora and bulbils of Polygonum viviparum and Saxifraga cernua were inhibited by passage, whereas the remaining species had too low germination percentage to allow for evaluation. Species with adaptations to wind dispersal seemed particularly vulnerable to gut pasage. Arctic foxes are able to provide long-distances dispersal of seeds lacking morphological adaptations to dispersal, but for most species seeds need to be defecated within 12 hours to remain viable.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- seed dispersal
- endozoochory
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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