Data from: Native-exotic richness relationship in Michigan prairies

<p>A better understanding of factors underlying positive correlations between native and exotic species richness, a pattern that is nearly ubiquitous at large scales in plant communities, may help managers modify these correlations to favor native plant species during restoration. Across 29 tallgrass prairie sites restored through seed sowing onto former agricultural lands, we examined whether the relationship between native and exotic richness is: 1) altered by management, such as seed additions and prescribed fire, 2) controlled instead by environmental conditions and successional processes, or 3) altered by management in certain environments and not in others.</p> <p>Two datasets. Both contain exotic and native plant SR across several prairie restorations, as well as data on seed mix properties (mix richness, seeding rate), fire frequency, age of restoration. "BassettNativeExoticData" contains data on additional factors that influence invasion: environmental factors (PCA of surrounding land use, tillage history, plant biomass, CV of plant biomass, total vegetative cover, PCA of soil characteristics, CV of soil water holding capacity, edge-area ratio). "BassettNativeExoticData.mngmt" contains detailed data on seed mixes (proportions of functional groups in seed mixes). Both raw and standardized ([value-mean]/sd) values for most data.</p>