Biol Invasions (2019) 21:947–960 https://doi.org/10.1007/s10530-018-1874-1 (0123456789().,-volV)(0123456789().,-volV) ORIGINAL PAPER Linear and non-linear effects of goldenrod invasions on native pollinator and plant populations Dawid Moron´ . Piotr Sko´rka . Magdalena Lenda . Joanna Kajzer-Bonk . Łukasz Mielczarek . Elzbieta_ Rozej-Pabijan_ . Marta Wantuch Received: 28 August 2017 / Accepted: 7 November 2018 / Published online: 19 November 2018 Ó The Author(s) 2018 Abstract The increased introduction of non-native and native plants. The species richness of native plants species to habitats is a characteristic of globalisation. decreased linearly with goldenrod cover, whereas the The impact of invading species on communities may abundance and species richness of bees and butterflies be either linearly or non-linearly related to the decreased non-linearly with increasing goldenrod invaders’ abundance in a habitat. However, non-linear cover. However, no statistically significant changes relationships with a threshold point at which the across goldenrod cover were noted for the abundance community can no longer tolerate the invasive species and species richness of hover flies. Because of the non- without loss of ecosystem functions remains poorly linear response, goldenrod had no visible impact on studied. We selected 31 wet meadow sites that bees and butterflies until it reached cover in a habitat encompassed the entire coverage spectrum of invasive of about 50% and 30–40%, respectively. Moreover, goldenrods, and surveyed the abundance and diversity changes driven by goldenrod in the plant and of pollinating insects (bees, butterflies and hover flies) D. Moron´ (&) Ł. Mielczarek Institute of Systematics and Evolution of Animals, Polish Department of Forests and Nature, Krako´w Municipal Academy of Sciences, Sławkowska 17, 31-016 Krako´w, Greenspace Authority, Reymonta 20, 30-059 Krako´w, Poland Poland e-mail:
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