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- Eckstein, Rolf LutzJustus-Liebig-University Giessen, Germany (author)
Variation in life-cycle between three rare and endangered floodplain violets in two regions : implications for population viability and conservation
- Article/chapterEnglish2009
Publisher, publication year, extent ...
- 2009-01-30
- Springer Science and Business Media LLC,2009
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:kau-37734
- https://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-37734URI
- https://doi.org/10.2478/s11756-009-0002-1DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- We studied the demography of Viola elatior, V. pumila, and V. stagnina, three rare and endangered Central European floodplain species, to (i) analyse variation in life-cycles among congeners and between regions (Dyje-Morava floodplains, Czech Republic; Upper Rhine, Germany), (ii) to define sensitive stages in the life-cycles, and (iii) to identify possible threats for population viability and species conservation. Matrix models were based on the fate of marked individuals from a total of 27 populations over two years. We analysed population growth rate (lambda), stage distribution, net reproductive rate (R (0)), generation time, age at first reproduction, and elasticity and calculated a life table response experiment (LTRE). Most populations were declining and lambda did not differ between species or regions during the observed interval. Despite higher probabilities for survival and flowering in the Dyje populations, R (0) was higher in the Rhine populations. Also other demographic traits showed consistent differences between regions and/or species. Complex life-cycles and large variation in lambda precluded unequivocal identification of sensitive stages or vital rates for conservation. Variation between regions may be a consequence of differences in habitat quality. Our results suggest that deterministic processes such as reduced management, succession, habitat destruction, and lack of disturbance through reduced or eliminated flooding present the strongest threat for the viability and persistence of populations of the three floodplain violets as compared with stochastic processes. However, the persistent seed bank of the species may buffer populations against environmental variation and represents a reservoir for recovery after resumption of suitable land-use management.
Subject headings and genre
- NATURVETENSKAP Biologi Botanik hsv//swe
- NATURAL SCIENCES Biological Sciences Botany hsv//eng
- Viola elatior
- Viola pumila
- Viola stagninaI
- conservation
- demography
- life table response experiment (LTRE)
- matrix models
- Biology
- Biologi
Added entries (persons, corporate bodies, meetings, titles ...)
- Danihelka, JiriCzech republic (author)
- Otte, Annette (author)
- Justus-Liebig-University Giessen, GermanyCzech republic (creator_code:org_t)
Related titles
- In:Biologia: Springer Science and Business Media LLC64:1, s. 69-800006-30881336-9563
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