Spreading of alien species and diversity of communities

0482599 - ÚVGZ 2019 RIV NL eng J - Journal Article
Kindlmann, Pavel - Honěk, A. - Martinková, Z.
Spreading of alien species and diversity of communities.
Biocontrol. Roč. 62, č. 3 (2017), s. 397-407. ISSN 1386-6141. E-ISSN 1573-8248
R&D Projects: GA ČR GA14-26561S; GA MŠMT(CZ) LO1415
Institutional support: RVO:86652079
Keywords : pallas coleoptera-coccinellidae * lady beetle coleoptera * harmonia-axyridis * harlequin ladybird * intraguild predation * geographical-distribution * generalist predators * biological-control * invasion history * native range * Alien species * Native species * Ladybirds * Aphid predators * Simulation model * Community
OECD category: Biodiversity conservation
Impact factor: 1.924, year: 2017

A new species invading a new area may cause a decrease in diversity of the community already present there. Comparison of temporal changes in species diversity of the new community (including alien species) with those of the original community (including only native species) may clarify our understanding of the effect of alien species. Using a simulation-based modelling approach we considered several scenarios describing the invasion of native communities by alien species and calculated the trends in Shannon-Wiener indices and in the numbers of species of the original and new communities during the course of the invasion. We found that despite a large increase in the population size of the invasive alien species the diversity of the original community may be little affected. Native species numbers may stay relatively constant for a long time and then suddenly collapse. The results indicate some possibly still concealed consequences of the spread of the invasive ladybird Harmonia axyridis (Pallas).
Permanent Link: http://hdl.handle.net/11104/0278012