John W. Morgan

Nutrient enrichment and herbivore exclusion disrupt the climate-driven balance between C3 and C4 plants in grasslands

The paper shows that nutrient enrichment, especially with nitrogen and phosphorus, reduces C4 plant cover in grasslands, disrupting climate-driven C3-C4 balance globally.

Local adaptation to climate facilitates a global invasion

The paper identifies mechanisms of local adaptation in cheatgrass invasion, showing multiple introductions and gene flow contributed to its success in North America.

Local nutrient addition drives plant biodiversity losses but not biotic homogenization in global grasslands

This study shows nutrient addition reduces plant diversity at local and larger scales equally, without causing biotic homogenization in global grasslands.

Darwin's Naturalization Conundrum explained by gradients of environmental stress and disturbance

The paper examines Darwin's Naturalization Conundrum by analyzing phylogenetic relatedness of non-native plant species along environmental gradients, finding that relatedness decreases with elevation and disturbance.