Abstract
Abstract Question: How does vegetation and management affect the population stage structure of Serratula tinctoria , a species indicative of highly endangered and species‐rich flood‐plain meadows? Are different management regimes suitable to support viable populations of S. tinctoria? Location: Flood‐plain of the northern Upper Rhine, Germany. Methods: We analysed the population structure of S. tinctoria at 24 meadow sites which differed in vegetation and management. In this comparative study the investigated meadows were either (1) late mown in September; (2) early mown in June or (3) mown in June and then grazed by sheep. Results: The structure of the surrounding vegetation had a clear effect on the population structure of S. tinctoria. The percentage of bare soil, as well as the cover of bryophytes, were positively related, whereas the Ellenberg N‐value of the established vegetation was negatively related to the density and proportion of seedlings. Generally, we found only slight differences between the population structure of S. tinctoria in early and late mown meadows. Both management regimes had high densities of seedlings. In contrast, the meadow pastures supported significantly lower densities of seedlings and generative adults but relatively high densities of juveniles and vegetative adults, indicating a greater importance of clonal propagation under grazing pressure. Conclusions: Our results clearly showed that viable populations of S. tinctoria may occur in all of the studied management regimes. Although S. tinctoria was considered to be highly sensitive to early mowing, our findings suggest a facilitation of the species at more nutrient‐rich sites by mowing in June, which is also a benefit for the integration of management in farming systems.
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Claims 11
Claim · model-written summary
Surrounding vegetation structure affected population structure.
- Taxon
- S. tinctoria
Serratula tinctoriae0 - Outcome
- population structuree0
- Setting
- surrounding vegetatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The structure of the surrounding vegetation had a clear effect on the population structure of S. tinctoria”
Claim · model-written summary
Bare soil percentage was positively related to seedling density and proportion.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- density and proportion of seedlingse0
- Direction
- positively relatede0
- Setting
- bare soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of bare soil, as well as the cover of bryophytes, were positively related, whereas the Ellenberg N‐value of the established vegetation was negatively related to the density and proportion of seedlings”
t0“Serratula tinctoria”
Claim · model-written summary
Bryophyte cover was positively related to seedling density and proportion.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- density and proportion of seedlingse0
- Direction
- positively relatede0
- Setting
- cover of bryophytese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of bare soil, as well as the cover of bryophytes, were positively related, whereas the Ellenberg N‐value of the established vegetation was negatively related to the density and proportion of seedlings”
t0“Serratula tinctoria”
Claim · model-written summary
Vegetation Ellenberg N‐value was negatively related to seedling density and proportion.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- density and proportion of seedlingse0
- Direction
- negatively relatede0
- Setting
- established vegetatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Ellenberg N‐value of the established vegetation was negatively related to the density and proportion of seedlings”
t0“Serratula tinctoria”
Claim · model-written summary
Early and late mowing yielded only slight differences in population structure.
- Taxon
- S. tinctoriaSerratula tinctoriae0
- Outcome
- population structuree0
- Direction
- slight differencese0
- Setting
- early and late mown meadowse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only slight differences between the population structure of S. tinctoria in early and late mown meadows”
Claim · model-written summary
Both mowing regimes had high seedling densities.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- densities of seedlingse0
- Direction
- highe0
- Setting
- Both management regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both management regimes had high densities of seedlings”
t0“Serratula tinctoria”
Claim · model-written summary
Meadow pastures had significantly lower seedling densities.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- densities of seedlingse0
- Direction
- lowere0
- Setting
- meadow pasturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the meadow pastures supported significantly lower densities of seedlings and generative adults but relatively high densities of juveniles and vegetative adults”
t0“Serratula tinctoria”
Claim · model-written summary
Meadow pastures had significantly lower generative adult densities.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- generative adultse0
- Direction
- lowere0
- Setting
- meadow pasturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the meadow pastures supported significantly lower densities of seedlings and generative adults but relatively high densities of juveniles and vegetative adults”
t0“Serratula tinctoria”
Claim · model-written summary
Meadow pastures had relatively high juvenile and vegetative adult densities.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Outcome
- densities of juveniles and vegetative adultse0
- Direction
- highe0
- Setting
- meadow pasturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the meadow pastures supported significantly lower densities of seedlings and generative adults but relatively high densities of juveniles and vegetative adults”
t0“Serratula tinctoria”
Claim · model-written summary
Viable populations may occur under all studied management regimes.
- Taxon
- S. tinctoriaSerratula tinctoriae0
- Outcome
- viable populationse0
- Qualifier
- all of the studied management regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“viable populations of S. tinctoria may occur in all of the studied management regimes”
Claim · model-written summary
June mowing may facilitate the species on more nutrient‐rich sites.
- Taxon
- Serratula tinctoriaSerratula tinctoriat0
- Treatment
- mowing in Junee0
- Outcome
- facilitation of the speciese0
- Direction
- facilitatione0
- Setting
- more nutrient‐rich sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our findings suggest a facilitation of the species at more nutrient‐rich sites by mowing in June”
t0“Serratula tinctoria”