||Genetic richness affects trait variation but not community productivity in a tree diversity experiment
||Bongers, F.J.; Schmid, B.; Durka, W.
; Li, S.; Bruelheide, H.; Hahn, C.Z.; Yan, H.; Ma, K.; Liu, X.
||BEF-China; forest; functional traits; genetic diversity; productivity; species diversity; trait variation
- Biodiversity–ecosystem functioning experiments found
that productivity generally increases with species richness, but less is
known about effects of within‐species genetic richness and potential
interactions between the two. While functional differences between
species can explain species richness effects, empirical evidence
regarding functional differences between genotypes within species and
potential consequences for productivity is largely lacking.
- We therefore measured within‐ and among‐species
variation in functional traits and growth and determined stand‐level
tree biomass in a large forest experiment factorially manipulating
species and genetic richness in subtropical China.
- Within‐species variation across genetic seed families,
in addition to variation across species, explained a substantial amount
of trait variation. Furthermore, trait responses to species and genetic
richness varied significantly within and between species. Multivariate
trait variation was larger among individuals from species mixtures than
from species monocultures, but similar among individuals from
genetically diverse vs. genetically uniform monocultures.
Correspondingly, species but not genetic richness had a positive effect
on stand‐level tree biomass.
- We argue that identifying functional diversity within
and among species in forest communities is necessary to separate effects
of species and genetic diversity on tree growth and community
|Persistent UFZ Identifier
|Bongers, F.J., Schmid, B., Durka, W., Li, S., Bruelheide, H., Hahn, C.Z., Yan, H., Ma, K., Liu, X. (2020):
Genetic richness affects trait variation but not community productivity in a tree diversity experiment
New Phytol. 227 (3), 744 - 756