Conservation biology, 2010-10, Vol.24 (5), p.1219-1229
2010
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Living at the Edge: Local versus Positional Factors in the Long-Term Population Dynamics of an Endangered Orchid
- Ist Teil von
- Conservation biology, 2010-10, Vol.24 (5), p.1219-1229
- Ort / Verlag
- Malden, USA: Blackwell Publishing Inc
- Erscheinungsjahr
- 2010
- Quelle
- Wiley Online Library - AutoHoldings Journals
- Beschreibungen/Notizen
- Populations at the margin of geographic ranges of distribution have been considered more vulnerable than central ones, but recent reviews have caste doubt on this generalization. We examined the reproductive and demographic performance of a rare Euroasiatic orchid ( Cypripedium calceolus) at its southwesterly range limit and compared our findings with those of previous studies of nine central populations at the center of the orchid's range. We sought to test the central-marginal model and to evaluate factors involved in long-term performance of forest Eurosiberian species with peripheral populations in southern European mountains. We characterized (structure, temporal fluctuations, herbivory, reproductive success, and recruitment at different habitats) four Pyrenean populations of C. calceolus of different sizes (5-3500 ramets) and monitored three of them for up to 13 years. Two quantitative stochastic models (count data and matrix models) were used to assess population trends and viability and the effect of herbivory. Contrary to expectations, and despite the negative effect of sporadic events of herbivory, the peripheral populations we studied (except the smallest one) performed similarly or better than populations occurring in central part of the species' range in terms of reproductive success and population growth rates. Landscape changes over the last 50 years suggest that natural reforestation could be involved in the success of this plant at its southern limit. Forest expansion in the mountain regions of southern Europe may provide new opportunities for plants with geographic distributions centered mainly at higher latitudes and give some hope for their recovery in future scenarios dominated by biodiversity loss.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0888-8892eISSN: 1523-1739DOI: 10.1111/j.1523-1739.2010.01466.xTitel-ID: cdi_proquest_miscellaneous_835119804
- Format
- –
- Schlagworte
- Animal and plant ecology, Animal, plant and microbial ecology, Applied ecology, Biogeography, Biological and medical sciences, Botany, cambio de hábitat, Comparative studies, Coniferous forests, Conservation biology, Conservation of Natural Resources - methods, Conservation, protection and management of environment and wildlife, count-based models, Cypripedium calceolus, Demecology, Ecosystem, Endangered & extinct species, Endangered Species, Estonia, Forest habitats, Fundamental and applied biological sciences. Psychology, General aspects, Geography, Grasses, habitat change, Habitat conservation, Herbivores, herbivory, herbivoría, matrix models, modelos basados en conteos, modelos matriciales, Models, Biological, Orchidaceae, Orchidaceae - growth & development, Parks, reserves, wildlife conservation. Endangered species: population survey and restocking, peripheral populations, Plant populations, Plants, poblaciones periféricas, Poland, Population Dynamics, Population growth rate, reproductive success, Saliency, Spain, stochastic population growth rate, tasa de crecimiento poblacional estocástica, éxito reproductivo