Sammanfattning

Vascular plants and lichens often produce a diversity of carbon-based secondary compounds (CBSCs) to protect them against biotic and abiotic stresses. These compounds play important but often compound-specific roles in community and ecosystem processes by affecting herbivore and decomposer activity. However, our understanding of what drives community-level CBSCs among ecosystems or across environmental gradients is limited.We measured concentrations and compositions of CBSCs for all dominant vascular plant and lichen species present across a 500-m alpine elevational gradient. These measurements were combined with data on species composition and abundance to obtain whole-community measures of plant and lichen CBSCs across the gradient.At the whole community level, plant CBSCs had the lowest concentrations while lichen CBSCs had the highest concentrations at the highest elevations. Further, plant CBCSs shifted from those associated with herbivore defence towards those protecting against light and oxidative stress as elevation increased, while lichen CBSCs showed the opposite pattern.Synthesis. Our findings that individual compounds show contrasting responses to the same environmental gradient highlight the importance of studying qualitative as well as quantitative changes in CBSCs. Further, the divergent responses between vascular plants and lichens reveal that in systems where both groups are abundant, they need to be considered simultaneously to better understand how future environmental changes may impact on ecosystem-level processes.A free Plain Language Summary can be found within the Supporting Information of this article.

Nyckelord

alpine ecology; defence; Finse Alpine Research Centre; flavonoids; lichens; phenols; tannins; vascular plants

Publicerad i

Functional Ecology
2021, Volym: 35, nummer: 2, sidor: 330-341
Utgivare: WILEY

SLU författare

• Wardle, David

  • Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
    
  • Nanyang Technological University (NTU)

Associerade SLU-program

SLU Nätverk växtskydd


Globala målen

Skydda, återställa och främja ett hållbart nyttjande av landbaserade ekosystem, hållbart bruka skogar, bekämpa ökenspridning, hejda och vrida tillbaka markförstöringen samt hejda förlusten av biologisk mångfald


UKÄ forskningsämne

Ekologi


Publikationens identifierare

DOI: https://doi.org/10.1111/1365-2435.13712

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/109388