Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Proceedings of the National Academy of Sciences of the United States of America
2026
|
| Schlagworte: | |
| Online-Zugang: | https://pubmed.ncbi.nlm.nih.gov/41642984/ |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Inhaltsangabe:
- Intense solar radiation constrains plant species richness in global grasslands. Spohn, Marie Arnillas, Carlos Alberto Bakker, Jonathan D Borer, Elizabeth T Bråthen, Kari Anne Cadotte, Marc W Carbutt, Clinton Catford, Jane A DuPre, Mary E Dwyer, Ciara Eisenhauer, Nico Estrada, Catalina Hagenah, Nicole Haider, Sylvia Harms, Kyle E Hautier, Yann Hersch-Green, Erika I Knops, Johannes M H Laanisto, Lauri Laungani, Ramesh Macek, Peter Martinson, Holly Millett, Jonathan Pärtel, Meelis Pennings, Steven C Peri, Pablo L Power, Sally A Risch, Anita C Roscher, Christiane Seabloom, Eric W Smith, Nicholas G Stevens, Carly Virtanen, Risto Wardle, Glenda M Zhang, Pengfei Grassland Biodiversity Biomass Plants Poaceae Photosynthesis Sunlight The search for predictors of plant diversity has challenged scientists for decades. Here we identify intense photosynthetically active radiation (PAR) as a major factor constraining plant species richness in global grasslands. We show that the strength of the negative relationship between species richness and PAR increases with increasing elevation and that species richness is more strongly correlated with intense PAR than with UV-B radiation, climate variables, and atmospheric nitrogen deposition. In addition to species richness, plant biomass was also negatively correlated with PAR at higher elevations, indicating that intense PAR also constrains plant biomass in montane grasslands. Furthermore, we show that the decrease in plant species richness with increasing PAR is mainly caused by a decrease in species richness of forbs, sedges, and rushes. In contrast, species richness of grasses was only negatively correlated with PAR at high elevations, and species richness of legumes was not significantly correlated with PAR. Our results suggest that PAR constrains plant species richness in global grasslands and limits the extent to which plant species of specific functional groups can migrate uphill in response to climate warming.