| Kategorie |
Textpublikation |
| Referenztyp |
Zeitschriften |
| DOI |
10.1111/1365-2745.13631
|
Lizenz  |
|
| Titel (primär) |
Biodiversity facets affect community surface temperature via 3D canopy structure in grassland communities |
| Autor |
Guimarães-Steinicke, C.; Weigelt, A.; Proulx, R.; Lanners, T.; Eisenhauer, N.; Duque‐Lazo, J.; Reu, B.; Roscher, C.; Wagg, C.; Buchmann, N.; Wirth, C. |
| Quelle |
Journal of Ecology |
| Erscheinungsjahr |
2021 |
| Department |
iDiv; PHYDIV |
| Band/Volume |
109 |
| Heft |
5 |
| Seite von |
1969 |
| Seite bis |
1985 |
| Sprache |
englisch |
| Topic |
T5 Future Landscapes |
| Daten-/Softwarelinks |
https://doi.org/10.5061/dryad.866t1g1q1 |
| Supplements |
https://besjournals.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2F1365-2745.13631&file=jec13631-sup-0001-Supinfo.docx |
| Keywords |
community canopy structure; facilitation; grassland; sampling effects; surface temperature; terrestrial laser scanning; thermal regulation |
| Abstract |
- Canopy structure is an important driver of the energy
budget of grassland ecosystem and is, at the same time, altered by plant
diversity. Diverse plant communities typically have taller and more
densely packed canopies than less diverse communities. With this, they
absorb more radiation, have a higher transpiring leaf surface and are
better coupled to the atmosphere which leads to cooler canopy surfaces.
However, whether plant diversity generally translates into a cooling
potential remains unclear and lacks empirical evidence. Here, we
assessed how functional identity, functional diversity, and species
richness of grassland communities in the Jena Experiment predict the
mean and variation of plant surface temperature mediated via effects of
canopy structure.
- Using terrestrial laser scanning, we estimated canopy
structure describing metrics of vertical structure (mean height, LAI),
the distribution (evenness), and the highest allocation (center of
gravity) of biomass along height strata. As metrics of horizontal
structure, we considered community stand gaps, canopy surface variation
and emergent flowers. We measured surface temperature with a thermal
camera. We used SEM models to predict biodiversity effects on the
surface temperature during two seasonal peaks of biomass.
- Before the first cut in May, herb‐dominated communities
directly promoted lower leaf surface temperatures. However, communities
with lower center of gravity (mostly herb‐dominated) also increased
canopy surface temperatures compared with grass‐dominated communities
with higher biomass stored in the top canopy. Grass‐dominated
communities showed a smaller variation of surface temperatures, which
was also positively affected by species richness via an increase in mean
height. In August, mean surface temperature decreased with increasing
community clumpiness and LAI. The variation of surface temperature was
greater in herb‐dominated than in grass‐dominated communities and
increased with plant species richness (direct effects).
- Synthesis: The mean and variation of canopy surface
temperature were driven by differences in functional group composition
(herbs‐ vs. grass dominance) and to a lesser extent by plant diversity.
These effects were partly mediated the metrics of canopy structure but
also by direct effects unrelated to the structural metrics considered.
|
| dauerhafte UFZ-Verlinkung |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24327 |
Guimarães-Steinicke, C., Weigelt, A., Proulx, R., Lanners, T., Eisenhauer, N., Duque‐Lazo, J., Reu, B., Roscher, C., Wagg, C., Buchmann, N., Wirth, C. (2021):
Biodiversity facets affect community surface temperature via 3D canopy structure in grassland communities
J. Ecol. 109 (5), 1969 - 1985 10.1111/1365-2745.13631 |
