The Prospects for Spread and Impacts of Removal of Eragrostis lehmanniana Nees

摘要: Non-indigenous invasive species are a major threat to native diversity and ecosystem function have been called the single worst of natural disaster this century. Eragrostis lehmanniana Nees (Lehmann lovegrass), tufted perennial bunchgrass southern Africa, is one such problematic in Arizona, USA. This dissertation research mix predictive modeling field experiments designed inform management decisions based on greater understanding nonnative species, with emphasis potential for spread impacts removal. The studies aimed predict distribution E. southwestern United States under current future climate conditions. first portion study addressed common assumption species: data from species’ range necessary accurately invaded range. second predicted 28 different change scenarios. Results showed progressively shrinking southeastern northwestern portions state increasing northeastern temperatures precipitation. Key shifts occurred scenarios increases summer winter precipitation 30% or more, maximum minimum at least 2C. experiment served as pre-eradication assessment indicates how semi-desert grassland communities Arizona may