Invasion in space and time: non-native species richness and relative abundance respond to interannual variation in productivity and diversity

TitleInvasion in space and time: non-native species richness and relative abundance respond to interannual variation in productivity and diversity
Publication TypeJournal Article
Year of Publication2004
AuthorsCleland EE, Smith MD, Andelman SJ, Bowles C, Carney KM, M. Horner-Devine C, Drake JM, Emery SM, Gramling JM, Vandermast DB
JournalEcology Letters
Volume7
Pagination947-957
Date Published2004
Accession NumberJRN00411
Call Number00836
Keywordsarticle, articles, journal, journals, plant productivity, plant, biodiversity, plant, diversity, plant, interannual variability, plant, invasion, plant, logistic regression, plant, relative abundance, plant, repeated measures, plant, resources, plant, species richness, plant, synthesis, statistical methods, logistic regressions, statistical methods, repeated measures, statistical methods, synthesis
Abstract

Ecologists have long sought to understand the relationships among species diversity, community productivity and invasion by non-native species. Here, four long-term observational datasets were analyzed using repeated measures statistics to determine how plant species richness and community resource capture (i.e., productivity) influenced invasion. Multiple factors influenced the results, including the metric used to quantify invasion, interannual variation and spatial scale. Native richness was positively correlated with non-native richness, but was usually negatively correlated with non-native abundance, and these patterns were stronger at the larger spatial scale. Logistic regressions indicted that the probability of invasion was reduced both within and following years with high productivity, except at the desert grassland site where high productivity was associated with increased invasion. Our analysis suggests that while non-natives were most likely to establish in species rich communities, their success was diminished by high resource capture by the resident community.

URLfiles/bibliography/JRN00411.pdf
DOI10.1111/j.1461-0248.2004.00655.x
Reprint EditionIn File (01/13/2005)