Contrasting Population Dynamics in the Boreo-AlpineSilene acaulis(Caryophyllaceae) at Its Southern Distribution Limit
| Autor: | Maria B Garcia, Grażyna Szarek-Łukaszewska, Jesus Villellas, Piotr Tomasz Bednarek |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
education.field_of_study Silene acaulis biology business.industry Ecology Population Caryophyllaceae Distribution (economics) Plant Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Population density Intraspecific competition Plant ecology Altitude education business Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Annales Botanici Fennici. 53:193-204 |
| ISSN: | 1797-2442 0003-3847 |
| Popis: | Classical theory predicts a high demographic vulnerability and diminished performance of peripheral plant populations, but recent studies highlight the fact that environmental factors may override that geographical pattern. In this study, we compare the density, population structure and population dynamics of the boreo-alpine Silene acaulis (Caryophyllaceae) in two locations at its southern European distribution limit, using matrix projection models. One population was close to the species' lower altitudinal limit, and thus exposed to more ecologically marginal conditions (higher intraspecific competition and temperature) than the population higher up. The low-altitude population was sparser and its members were older as a result of lower recruitment and survival of new individuals. Additionally, this population's growth rate was lower, mainly due to a shorter permanence of large plants. The contrasting demographic differences between two closely located, southern peripheral populations highlight the impo... |
| Databáze: | OpenAIRE |
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