DISTRIBUTION OF INVASIVE SPECIES (CRASSULACEAE) IN THE DAUGAVPILS CITY (LATVIA)
DOI:
https://doi.org/10.17770/etr2009vol2.1033Keywords:
Crassulaceae, invasive species, spatial distributionAbstract
The problem of invasive plant species is becoming more popular all over the world. The peculiarities of alien plant species is also growing in Latvia every year. Invasive species are the serious problem for natural ecosystem and species protection, in traditional landscape visual conservation as well it shows noticeable economical reducing in farming. Existing flora and its structure was as appearing in approximately 10 000-15 000 years after the last examining. It is still developing, quantitative and qualitative plant changes continue to grow in flora. That has an influence on natural narrowing, distribution and species changes. In Latvia, as well in such city as Daugavpils, such questions as alien plant growing were examined only in some fragments. An alien plant growing was analyzed. The following facts are found the biggest plant concentration is noticed in dry and sunny places well near the artificial plant areas.Downloads
References
Allendorf F.W., Lundquist L.L. Introduction: population biology, evolution, and control of invasive species. Conserv.Biol, 2003. 17:24-30
Essl F., Walter J., Kienh M. Non-indigenous vascular plant species in Austria. Euro-gard III – Abstracts, 2002. 21.pp
Gavrilova Ģ., Šulcs V. Latvijas vaskulāro augu flora. Rīga: Latvijas Universitātes bioloģijas institūts Botānikas laboratorija, 1999. 64.lpp.
Kļaviņš M., Andrušaitis A. Klimata mainība un globālā sasilšana. Rīga: LU, 2008.
Laiviņš M. Latvijas veģetācija 1.Latvijas boreālo mežu sinantropizācija un eitrofikācija. R.: LU Bioģeogrāfijas laboratorija, 1998. 137 lpp.
Lodge DM. Biological invasions: lessons for ecology. Trends Ecol.Evol. 8:133-37. 1993.
Lodge DM. Species invasions and deletions: community effects and responses to climate and habitat change. In Biotic Interactions and Global Change, 1993. pp. 367-87.
Money H.A. Invasive alien species: a new synthesis.-Washington, DC:Island Press, 2005. 368 p.
Ozols A. Kokaugu introdukcija un aklimatizācija. R.: Latvijas Valsts izdevniecība, 1959.
Rabitsch W., Essl F. Biological invasions in Austria: patterns and case studies. Biological Invasions, 2006. 8: 295-308
Simberloff D. Impacts of introduced species in the United States. Consequences: Nat.Implic. Environ Change, 1996. 2:13-22.
Svilāns A. Invazīvie citzemju taksoni Latvijā (diskutējamie jautājumi). Latvijas veģetācija 7. Rīga: LU izdevniecība, 2003. 103 lpp.
Vitousek P.M., D’Antonio C.M., Loope L.L., Westbrooks R. Biological invasions as global environment change. Am.Sci. 1996. 84:218-28.
Табака Л.В., Гаврилова Г.Б., Фатаре И.Я. и др. Флора и растительность Латвийской ССР: Восточно-Латвийский геоботанический район. Рига: Зинатне, 1985. 295 с.
