Abstract
The viable seed content of soil samples from five coniferous forest stands in northern Sweden, aged 16–169 years, was determined by means of germination trials. The soil samples were separated into five fractions: three organic horizons and two mineral soil horizons. Seedlings of 15 phanerogam species emerged, representing densities of 239–763 seeds/m 2 in the soils from the different stands. The depth distributions of the seeds varied with both plant species and forest stand. Most seeds were found at various depths in the humus layer, but in one stand an appreciable seed density of Luzula pilosa was present in the mineral soil. Most of the seedlings belonged to plant species present in the vegetation or with good means of dispersal. The depth distribution data, however, suggest that Luzula pilosa in particular may have a persistent seed bank. The role of persistent seeds in the vegetational composition of the boreal forest is discussed.
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Claims 7
Claim · model-written summary
Seedlings of 15 phanerogam species emerged from the forest soils.
Verbatim
e0“Seedlings of 15 phanerogam species emerged”
Claim · model-written summary
Seed densities across stands ranged from 239 to 763 seeds per square metre.
Verbatim
e0“densities of 239–763 seeds/m 2 in the soils from the different stands”
t0“boreal forest stands”
Claim · model-written summary
Seed depth distributions varied by plant species and forest stand.
Not reportedDirection
Verbatim
e0“The depth distributions of the seeds varied with both plant species and forest stand”
t0“boreal forest stands”
Claim · model-written summary
Most seeds occurred at various depths in the humus layer.
Verbatim
e0“Most seeds were found at various depths in the humus layer”
t0“boreal forest stands”
Claim · model-written summary
One stand had appreciable Luzula pilosa seed density in mineral soil.
- Taxon
- Luzula pilosa
Luzula pilosae0 - Organ / stage
- seede0
- Outcome
- seed densitye0
- Qualifier
- in the mineral soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in one stand an appreciable seed density of Luzula pilosa was present in the mineral soil”
Claim · model-written summary
Most seedlings belonged to species present in the vegetation or with good dispersal.
Verbatim
e0“Most of the seedlings belonged to plant species present in the vegetation or with good means of dispersal”
Claim · model-written summary
The depth data suggest Luzula pilosa may maintain a persistent seed bank.
- Taxon
- Luzula pilosaLuzula pilosae0
- Outcome
- persistent seed banke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Luzula pilosa in particular may have a persistent seed bank”