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Impacts of invasive alien species on riparian plant communities in South African savanna
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SYSNO ASEP 0583844 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Impacts of invasive alien species on riparian plant communities in South African savanna Author(s) Hejda, Martin (BU-J) RID, ORCID
Čuda, Jan (BU-J) ORCID, RID
Pyšková, Klára (BU-J) ORCID
Foxcroft, L. C. (ZA)
Nkuna, K. V. (ZA)
Novoa, Ana (BU-J) ORCID
Pyšek, Petr (BU-J) RID, ORCIDArticle number e39 Source Title Journal of Tropical Ecology. - : Cambridge University Press - ISSN 0266-4674
Roč. 39, November (2023)Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords plant invasion ; African savanna ; impact OECD category Ecology R&D Projects GA22-23532S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support BU-J - RVO:67985939 UT WOS 001100773700001 EID SCOPUS 85178213979 DOI 10.1017/S0266467423000299 Annotation Biological invasions are a threat to protected areas globally, however, the relative lack of studies quantifying the ecological impacts impairs informed decision-making. We selected three annual alien plants, widespread in the riparian habitats of the Kruger National Park, South Africa: Datura innoxia, Parthenium hysterophorus, and Xanthium strumarium, to examine their potential impacts on riparian plant communities. We identified 12–13 populations for each and placed a pair of invaded and uninvaded plots in each population. Species richness, Shannon diversity, and Pielou evenness were compared between the invaded and ininvaded plots using LMM models, and species composition was compared using ordination. The invaded vegetation showed lower species richness compared to the uninvaded, with the strongest effect observed for P. hysterophorus. The invaded plots also showed lower Shannon diversity and Pielou evenness due to the presence of alien dominants. For all three invaders, the invasion resulted in changes in the composition of native vegetation. Some native plants were more frequent and abundant in the invaded vegetation, possibly due to the habitats created in sandy river beds. The native species richness decreased with increasing invader cover, but the species richness of aliens accompanying the invasive dominants was not negatively affected by their cover. Our results confirmed the negative impact of invasive aliens on native plant diversity, with the most pronounced effect by Parthenium hysterophorus invasions. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2024 Electronic address https://doi.org/10.1017/S0266467423000299
Number of the records: 1