Species-specific effects of genetic diversity and species diversity of experimental communities on early tree performance

Created at: 2016-11-03

Envisaged journal: Journal of Plant Ecology

Envisaged date: 2016-11-03

Rationale

Aims
Changing biodiversity can affect ecosystem functioning. However, the role of genetic diversity within species, relative to the one of species diversity, has hardly been addressed.
Methods
To address the effects of both genetic diversity and species diversity during the important stage of on early tree life, we used 8 seed families taken from each of 12 evergreen and deciduous tree species of subtropical forest to perform a factorial experiment. We established 264 communities of 16 trees each. Each community had a species diversity of either 1 or 4 species and a genetic diversity of either 1, 2 or 4 seed families per species. We measured plant survival, growth rate, final biomass, and herbivory 20 months after sowing.
Important findings
Species differed from each other in biomass, growth rate, herbivory and survival (p< 0.05) than evergreen species. Species diversity affected the performance of different species differently (species diversity by species interaction, p< 0.001). Our study showed pronounced species-specific responses of early tree 36 performance to species diversity, and less pronounced responses to genetic diversity. These species specific responses suggest feedbacks of species diversity and genetic diversity on future species composition.

Datasets

No datasets are linked to this paperproposal.

Calculated Authors

Xueqin Zeng Walter Durka Markus Fischer

Data request state

Preparation Project Board Finished