Forest ecosystems and biodiversity are considered integral to maintaining carbon capture capacity, forest health and resilience on the one hand while supporting human wellbeing, and livelihoods, and providing other important ecosystem services to sustain life on the planet (Rawat, 2017). Biological invasion is caused by non-native organisms such as plants, insects, or pathogens that have been intentionally or accidentally introduced outside of their native distribution range for specific purposes. These invasive alien species escape from their areas of introduction, aggressively spread out and overwhelmingly dominate the entire landscape (e.g., forest ecosystems) by out-competing native species. Invasiveness can also be described as the tendency of an introduced species to aggressively spread due to its defining characteristics (i.e., introduction history, species traits, ecology, and evolutionary processes) into a recipient ecosystem (such as a forest ecosystem) (van Kleunen et al., 2010). Invasion in complex forest ecosystems is often a concern when the system is no longer able to regulate itself and when the invasion has already altered the regular composition, abundance and diversity. Early detection of invasiveness and the implementation of subsequent restorative measures are of paramount importance (van Wilgen and Wannenburgh, 2016). In a holistic approach, detection comes first, followed by an understanding of the dynamics, exploration of mitigating options, implementation of mitigation measures and an attempt to restore the pre-invasion state (Rai and Singh, 2020). Some of the invasions are responses to the impacts of climate change such as flooding and local weather conditions which call for the implementation of a multidimensional investigation so as to identify and avail effective mitigation measures. While mitigation and restorative intervention measures are being urgently sought, managing invasiveness in complex forest ecosystems poses a strong challenge as the outcomes are not straightforward. Nevertheless, targeted multi-dimensional interventions that are supported by adequate empirical evidence are helpful in managing invasiveness in the absence of a comprehensive understanding of interactions and causations. Thus, this Research Topic presents five recent contributions from dedicated scholars that provided empirical investigations and results on the impacts of invasive plant management on forest biodiversity and ecosystem services with regard to detection, application of restorative measures and outcomes.