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Population structure and establishment of the threatened long-lived perennial Scorzonera humilis in relation to environment by Guy Colling; Diethart Matthies; Claude Reckinger is a Environmental Science article available to read on EtoBox.

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## Summary The intensification of agriculture has resulted in the decline of many plant species of nutrient‐poor wet grasslands. At some sites local populations of long‐lived characteristic species have persisted and might benefit from recent extensification schemes. However, little is known about the population biology of these plants, and the prospects for the populations are uncertain. We studied the population structure and establishment of the long‐lived __Scorzonera humilis__ in 23 populations in Luxembourg and neighbouring Belgium. Two types of populations could be distinguished according to their population structure: regenerating populations, with a high proportion of plants with only one or a few rosettes, and aged populations, with a low proportion of small, young plants but a high proportion of individuals with many rosettes. The total density of __Scorzonera__ individuals was higher in regenerating than in aged populations. Within sites, __S. humilis__ was restricted to more open and nutrient‐poor patches. The composition of the vegetation in plots where __S. humilis__ was present was significantly different from that of plots without the species, indicating that __S.

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Author

Guy Colling; Diethart Matthies; Claude Reckinger

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley; JSTOR (ISSN 0021-8901)

Published

2002

Language

EN

Field

Environmental Science (Physical Sciences)