Abstract
Mathematical models are developed to examine the population—level response of an herbaceous plant species (teasel, Dipsacus sylvestris Huds.) which was experimentally introduced into several habitats and monitored for 5 yr. Models based on morphological stages (size) rather than chronological age give more satisfactory results. Populations growth rates (λ m ) range from 0.63 to 2.60, which are likely typical for fugitive plants. Values are interpreted as responses to both external and internal factors. Grass litter, and the presence of other dicotyledonous species, and the overall primary productivity of the rest of the community are important factors determining the success or failure of an attempted colonization by teasel. Individual plant and population—level growth rates seem to be determined independently.
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Claims 4
Claim · model-written summary
Stage-based models gave more satisfactory results than age-based models.
Verbatim
e0“Models based on morphological stages (size) rather than chronological age give more satisfactory results”
t0“Teasel”
Claim · model-written summary
Teasel population growth rates ranged from 0.63 to 2.60.
Verbatim
e0“Populations growth rates (λ m ) range from 0.63 to 2.60”
t0“Teasel”
Claim · model-written summary
Grass litter, other dicots, and community productivity determined colonization success.
- Taxon
- teasele0
- Outcome
- success or failure of an attempted colonizatione0
- Setting
- Grass litter, and the presence of other dicotyledonous species, and the overall primary productivity of the rest of the communitye0
Not reportedDirection
Verbatim
e0“Grass litter, and the presence of other dicotyledonous species, and the overall primary productivity of the rest of the community are important factors determining the success or failure of an attempted colonization by teasel”
Claim · model-written summary
Individual and population growth rates appeared independently determined.
- Taxon
- Teaselt0
- Organ / stage
- Individual plante0
- Outcome
- Individual plant and population—level growth ratese0
- Qualifier
- independentlye0
Not reportedDirection
Verbatim
e0“Individual plant and population—level growth rates seem to be determined independently”
t0“Teasel”