Classifying species as 'native' or 'alien' carries prescriptive force in the valuation and management of 'nature'. But the classification itself and its application are contested, raising philosophical and geographical questions about place, space, rights, identity and belonging. This paper discusses leading critiques of the native/ alien paradigm, including its conceptual fluidity, dichotomous rigidity and ethical difficulties, as well as the incendiary charge of xenophobia. It argues that valorizing 'native nature' as inherently the 'best nature' is not only obsolete but impracticable in the Anthropocene, and that the preeminence of biogeographic origins should be replaced with a pragmatic focus on species' behavior.
KEYWORDSAlien; native; species; invasion; nature
Introduction: Biogeographies of Belonging and ExclusionClassifying species as either native or alien is central to nature conservation practice, with natives cherished and aliens resisted, but both the distinction itself and policy prescriptions based on it have been extensively critiqued. This paper explores the fractious, longstanding debates between those who champion 'native nature' and those who advocate a more inclusive, cosmopolitan approach (Keulartz & van der Weele, 2009; Stanescu, 2017), one which embraces new arrivals and the novel assemblages of the Anthropocene. It adopts a geographical lens because distinguishing between native and alien species is an essentially geographical categorization, hinging on questions of scale, place, space, culture and environment which lie at the heart of geography (Antonsich, 2020;Warren, 2007). The distinction creates geographies of spatial inclusion and exclusion, defining where species belong (Cresswell, 1997). Curiously, given that such geographical questions are central to native/alien debates and that the arguments turn on questions of spatial and temporal scale, geographers -with relatively few exceptions (notably Head (2012(notably Head ( , 2014(notably Head ( , 2017) -have only engaged sporadically.By contrast, environmental philosophers have developed a rich and nuanced seam of discussion of the contested ethics and values concerning native and alien species (e.g.