Aim Biological invasions are widely recognised as a major driver of global change, yet their mechanisms and impacts remain unevenly quantified across ecosystem dimensions. Freshwater ecosystems, among the most threatened worldwide, offer a critical arena to test invasion theory, from Elton's hypothesis on biotic resistance to contemporary models of trophic cascades and ecosystem regime shifts. Here, we aim to quantify the glob...

Morphological variability plays a key role in the establishment and spread of invasive fish species, influencing essential life functions and adaptability to new environments. In this study, we examined the morphological diversity of the topmouth gudgeon, Pseudorasbora parva (Temminck & Schlegel, 1846), across both its native and invasive ranges to assess patterns of evolutionary adaptation during its invasive process. Our fin...

The introduction and use of non‐native species in aquaculture have played a central role in the development of this economic sector worldwide. Tilapia is one of the most widely introduced species in the world, and China has become the largest producer and consumer of tilapia. While non‐native tilapia in China support provisioning ecosystem services of substantial economic value, the invasion also poses potential threats to nat...

Introduction pathways play a pivotal role in the success of Invasive Alien Species (IAS)—the subset of alien species that have a negative environmental and/or socio-economic impact. Pathways refer to the fundamental processes that leads to the introduction of a species from one geographical location to another—marking the beginning of all alien species invasions. Increased knowledge of pathways is essential to help reduce the...

Invasive fish species impact aquatic ecosystems and modify native communities, often leading to a decline in local species. These ecological impacts include the transmission of pathogens, predation, competition as well as hybridization. Two invasive fish species, the common bleak Alburnus alburnus and the topmouth gudgeon Pseudorabora parva , have both been recently found co‐occurring in several regions of southern Europe, suc...

Facilitated by the intensification of global trading, the introduction and dispersal of species to areas in which they are historically non‐native is nowadays common. From an evolutionary standpoint, invasions are paradoxical: not only non‐native environments could be different from native ones for which introduced individuals would be ill‐adapted, but also small founding population size should be associated with reduced adapt...

Understanding drivers of freshwater fish assemblages is critically important for biodiversity conservation strategies, especially in rapidly developing countries, which often have environmental protections lagging behind economic development. The influences of natural and human factors in structuring fish assemblages and their relative contributions are likely to change given the increasing magnitude of human activities. To di...

The genetic variability and population structure of introduced species in their native range are potentially important determinants of their invasion success, yet data on native populations are often poorly represented in relevant studies. Consequently, to determine the contribution of genetic structuring in the native range of topmouth gudgeon Pseudorasbora parva to their high invasion success in Europe, we used a dataset com...

In recent years, policy‐makers have sought the development of appropriate tools to prevent and manage introductions of invasive species. However, these tools are not well suited for introductions of non‐target species that are unknowingly released alongside intentionally‐introduced species. The most compelling example of such invasion is arguably the topmouth gudgeon Pseudorasbora parva, a small cyprinid species originating fr...