Realized niche shift associated withGalinsoga quadriradiata(Asteraceae) invasion in China

Abstract

Aims Shifts in the realized niches of exotic species may play an important role in their invasion. Galinsoga quadriradiata has invaded China widely and occupied many climate zones that are different from its native range. We addressed the climatic niche shift of G. quadriradiata, and evaluated how this could contribute to its invasion in China. Methods We used the Maxent model to predict the potential distribution of G. quadriradiata using its native and invaded range occurrences and climatic variables. Principal component analysis was conducted to measure climatic niche shifts of G. quadriradiata during its invasion in China. Important Findings The models revealed only 32.7% niche overlap between the native and invasive populations. The niche similarity of the two populations was significantly low (Schoener’s D = 0.093, P<0.005), suggesting the occurrence of a niche shift. The envelop and center of the realized climatic niche in China has shifted to lower temperature and less precipitation compared to that in its native range. The majority of invaded areas in southern China are in the stabilizing zone, whereas the colonization and adaptation zones are predicted to be at the leading edge of G. quadriradiata invasion in northern China. This suggests that the regional distribution of G. quadriradiata may be in a quasi-equilibrium state, and that the species continues to invade environmentally suitable areas. Alterations in G. quadriradiata’s niche would help to explain why this species is so invasive in China.

Seed longevity and germination of the emerging invasive species wavyleaf basketgrass (Oplismenus undulatifolius) under varied light regimes

“…Introduced species are often exposed to novel climatic conditions in their new ranges or released from competitive biotic constraints encountered in their native ranges. Rapid evolutionary change in response to these new local conditions may facilitate expansion of introduced species beyond conditions characteristic of their native range, particularly when population differentiation follows climatic gradients in the introduced range (Blossey et al 2017; Quiroga et al 2018; Zhang et al 2022). Indeed, recent studies have found evidence of population differentiation in seed germination requirements of invasive Johnsongrass [ Sorghum halepense (L.) Pers.]…”

Assessing niche conservatism and invasive potential of the "pompom weed" Campuloclinium macrocephalum (Asteraceae) using ordination and ecological niche modeling

“…Species distribution models are frequently employed to assess the potential impact of non-native species in new habitats, assuming that the climatic niche remains constant (Gallagher et al 2010). A valuable approach to elucidating the complexity of plant invasion is to contrast global and regional niches (Taucare-Ríos et al 2016; Zhang et al 2021). Reciprocal modeling from the invaded range to the native range can assist in identifying the potential origin of the biotypes that invaded a country (Suárez-Mota et al 2016).…”

“…Ordination techniques such as principal component analysis are adequate for the quanti cation of niche dynamics (Guisan et al 2014). These analyses, in conjunction with metrics that estimate niche emptiness, stability, and expansion, plus equivalence and similarity tests, provide an effective tool for predicting the invasive potential of alien species, their capacity to thrive and expand in novel habitats and, consequently, to identify environments or geographic areas most at risk for future invasions (Gallagher et al 2010;Dinis et al 2020;Zhang et al 2021;Aravind et al 2022). The results of the comparisons of environmental variables and the environmental PCA indicate that the native and invaded ranges of C. macrocephalum evidence similar ecological tolerances.…”

Large shifts of niche and range in the golden apple snail (Pomacea canaliculata), an aquatic invasive species

“…It provides one of the essential foundations for invasion ecology, possibly because it unfolds the links between distributions of alien invasive species (AIS), environmental variables, and the potential range shifts of AIS under the background of global climate change (Davies et al, 2019; MacDougall et al, 2009). Ecological niche models (ENMs) are widely used to predict the potential distributions of AIS and their shifts under global change scenarios (e.g., Bellard et al, 2013; Fang et al, 2021; Luizza et al, 2016; Zhang et al, 2022), which could help us develop management strategies against the invasions of AIS. However, one of the key underlying assumptions of ENMs is the ecological niche conservatism hypothesis (Pearman et al, 2008; Petitpierre et al, 2012).…”