Sally A. Power

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

The paper examines drought response mechanisms in 16 Australian grass species, finding that stomatal closure, hydraulic impairment, and leaf browning occur simultaneously, unlike in trees, and drought traits are not correlated with climate origin.

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

The paper quantifies a global soil organic carbon sink of 1.83 petagrams per year from 1992 to 2020, driven by extratropical and boreal ecosystems, highlighting the importance of soil conservation for climate mitigation.