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Traits of dominant plant species drive normalized difference vegetation index in grasslands globally

Engel, Thore; Bruelheide, Helge; Hoss, Daniela; Sabatini, Francesco M.; Altman, Jan; Arfin-Khan, Mohammed A.S.; Bergmeier, Erwin; Černý, Tomáš; Chytrý, Milan; Dainese, Matteo; Dengler, Jürgen; Dolezal, Jiri; Field, Richard; Fischer, Felícia M.; Huygens, Dries; Jandt, Ute; Jansen, Florian; Jentsch, Anke; Karger, Dirk N.; Kattge, Jens; Lenoir, Jonathan; Lens, Frederic; Loos, Jaqueline; Niinemets, Ülo; Overbeck, Gerhard E.; Ozinga, Wim A.; Penuelas, Josep; Peyre, Gwendolyn; Phillips, Oliver; Reich, Peter B.; Römermann, Christine; Sandel, Brody; Schmidt, Marco; Schrodt, Franziska; Velez-Martin, Eduardo; Violle, Cyrille; Pillar, Valério

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Authors

Thore Engel

Helge Bruelheide

Daniela Hoss

Francesco M. Sabatini

Jan Altman

Mohammed A.S. Arfin-Khan

Erwin Bergmeier

Tomáš Černý

Milan Chytrý

Matteo Dainese

Jürgen Dengler

Jiri Dolezal

Felícia M. Fischer

Dries Huygens

Ute Jandt

Florian Jansen

Anke Jentsch

Dirk N. Karger

Jens Kattge

Jonathan Lenoir

Frederic Lens

Jaqueline Loos

Ülo Niinemets

Gerhard E. Overbeck

Wim A. Ozinga

Josep Penuelas

Gwendolyn Peyre

Oliver Phillips

Peter B. Reich

Christine Römermann

Brody Sandel

Marco Schmidt

Eduardo Velez-Martin

Cyrille Violle

Valério Pillar



Abstract

Aim: Theoretical, experimental and observational studies have shown that biodiversity–ecosystem functioning (BEF) relationships are influenced by functional community structure through two mutually non-exclusive mechanisms: (1) the dominance effect (which relates to the traits of the dominant species); and (2) the niche partitioning effect [which relates to functional diversity (FD)]. Although both mechanisms have been studied in plant communities and experiments at small spatial extents, it remains unclear whether evidence from small-extent case studies translates into a generalizable macroecological pattern. Here, we evaluate dominance and niche partitioning effects simultaneously in grassland systems world-wide. Location: Two thousand nine hundred and forty-one grassland plots globally. Time period: 2000–2014. Major taxa studied: Vascular plants. Methods: We obtained plot-based data on functional community structure from the global vegetation plot database “sPlot”, which combines species composition with plant trait data from the “TRY” database. We used data on the community-weighted mean (CWM) and FD for 18 ecologically relevant plant traits. As an indicator of primary productivity, we extracted the satellite-derived normalized difference vegetation index (NDVI) from MODIS. Using generalized additive models and deviation partitioning, we estimated the contributions of trait CWM and FD to the variation in annual maximum NDVI, while controlling for climatic variables and spatial structure. Results: Grassland communities dominated by relatively tall species with acquisitive traits had higher NDVI values, suggesting the prevalence of dominance effects for BEF relationships. We found no support for niche partitioning for the functional traits analysed, because NDVI remained unaffected by FD. Most of the predictive power of traits was shared by climatic predictors and spatial coordinates. This highlights the importance of community assembly processes for BEF relationships in natural communities. Main conclusions: Our analysis provides empirical evidence that plant functional community structure and global patterns in primary productivity are linked through the resource economics and size traits of the dominant species. This is an important test of the hypotheses underlying BEF relationships at the global scale.

Citation

Engel, T., Bruelheide, H., Hoss, D., Sabatini, F. M., Altman, J., Arfin-Khan, M. A., …Pillar, V. (2023). Traits of dominant plant species drive normalized difference vegetation index in grasslands globally. Global Ecology and Biogeography, 32(5), 695-706. https://doi.org/10.1111/geb.13644

Journal Article Type Article
Acceptance Date Jan 4, 2023
Online Publication Date Feb 22, 2023
Publication Date 2023-05
Deposit Date Feb 27, 2023
Publicly Available Date Feb 28, 2023
Journal Global Ecology and Biogeography
Print ISSN 1466-822X
Electronic ISSN 1466-8238
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 32
Issue 5
Pages 695-706
DOI https://doi.org/10.1111/geb.13644
Keywords Biodiversity–ecosystem functioning, biodiversity, community-weighted mean, ecosystem functioning, functional diversity, sPlot, traits, vegetation
Public URL https://nottingham-repository.worktribe.com/output/17665285
Publisher URL https://onlinelibrary.wiley.com/doi/10.1111/geb.13644

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