Invasive plants negatively impact native, but not exotic, animals

Despite our growing understanding of the impacts of invasive plants on ecosystem structure and function, important gaps remain, including whether native and exotic species respond differently to plant invasion. This would elucidate basic ecological interactions and inform management. We performed a meta-analytic review of the effects of invasive plants on native and exotic resident animals. We found that invasive plants reduced the abundance of native, but not exotic, animals. This varied by animal phyla, with invasive plants reducing the abundance of native annelids and chordates, but not mollusks or arthropods. We found dissimilar impacts among "wet" and "dry" ecosystems, but not among animal trophic levels. Additionally, the impact of invasive plants increased over time, but this did not vary with animal nativity. Our review found that no studies considered resident nativity differences, and most did not identify animals to species. We call for more rigorous studies of invaded community impacts across taxa, and most importantly, explicit consideration of resident biogeographic origin. We provide an important first insight into how native and exotic species respond differently to invasion, the consequences of which may facilitate cascading trophic disruptions further exacerbating global change consequences to ecosystem structure and function.

Tracking changes in natural history collections utilization: A case study at the Museum of Southwestern Biology at the University of New Mexico

Natural history collections (NHCs) are used in many fields of study, but general knowledge regarding their uses is poor. Because of this, funding and support for NHCs frequently fluctuate. One way in which collections professionals can illustrate a collection’s contribution to a variety of fields is based on the collection’s history of use. Tracking NHC utilization through time can increase NHC value to others outside of the collection, allow for the analysis of changes in specimen-based research trends, and assist in effective collection management. This case study focuses on NHC usage records held by the Museum of Southwestern Biology (MSB), a currently growing university collection used in many research fields, and presents methods for quantifying collections utilization through time. Through an exploration of these data, this paper illustrates MSB’s growth and changes in research produced over time and offers explanations for the changes observed. Last, this study provides suggestions for how collections professionals can most greatly benefit from considering NHC records as a data source. Understanding NHC usage from “the collection’s perspective” provides a new way for NHC professionals to understand NHCs’ value in the context of the research it supports and demonstrates the importance of this key infrastructure to a broader audience.