Demographic flexibility influences colonization success: profiling invasive fish species in the Danube River by the use of population models

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• 作者：Ivan Jari? ; Milica Ja?imovi? ; Gor?in Cvijanovi?…
• 关键词：Non ; native species ; Alien species ; Exotic species ; Life history trait ; Population model ; Elasticity
• 刊名：Biological Invasions
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：17
• 期：1
• 页码：219-229
• 全文大小：712 KB
• 参考文献：1. Bódis E, Borza P, Potyó I, Puky M, Weiperth A, Guti G (2012) Invasive mollusc, crustacean, fish and reptile species along the Hungarian stretch of the River Danube and some connected waters. Acta Zool Acad Sci Hung 58:29-5
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• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  Ecology
  Hydrobiology
  Zoology
  Forestry
  
• 出版者：Springer Netherlands
• ISSN：1573-1464

文摘

Invasive species have the ability to modify their life-history traits in newly colonized areas, with positive shifts in specific life history traits under favourable environmental conditions. If such positive changes in their life history result in a comparably larger population growth rate, it may give them a competitive edge over native species, support faster range expansion and contribute to their invasion success. Within the present paper we hypothesized that the demographic flexibility represents an important contribution to the invasion success of exotic species, and that demographic flexibility patterns of invasive species differ from those in unsuccessful invaders. We tested this hypothesis by the use of elasticity analysis applied on simple age-structured population models of invasive fish species in the Danube River, as well as of non-native species that failed to establish or become invasive. Findings imply that the invasive fish species could have the ability to experience a more rapid population growth under favourable environmental conditions, especially those that sustain recruitment, while at the same time being more robust to changes in survival. The highest population elasticity among the assessed alien invasive species was detected in stone moroko (Pseudorasbora parva). The described approach has the potential to be used as an additional screening tool for invasive species. When combined with other invasion risk profiling methods, it can provide additional insight into characteristics of species invasions and in invasion potential of a species.