“Community assembly history alters relationships between biodiversity and ecosystem functions during restoration” #grasslands @catano_chris @lars_brudvig @DrAnnaFunk

“Community assembly history alters relationships between biodiversity and ecosystem functions during restoration”

This open access article was published online on October 31, 2022 in the journal Ecology. Access the article through the permanent web address (DOI) (https://doi.org/10.1002/ecy.3910)

Abstract

Relationships between biodiversity and ecosystem functioning depend on the processes structuring community assembly. However, predicting biodiversity-ecosystem functioning relationships based on community assembly remains challenging because assembly outcomes are often contingent on history and the consequences of history for ecosystem functions are poorly understood. In a grassland restoration experiment, we isolated the role of history for the relationships between plant biodiversity and multiple ecosystem functions by initiating assembly in three different years, while controlling for all other aspects of community assembly.

We found that two aspects of assembly history — establishment year and succession — altered species and trait community trajectories, which in turn altered net primary productivity, decomposition rates, and floral resources. Moreover, history altered biodiversity-ecosystem functioning relationships (which ranged from positive to negative), both within and across functions, by modifying the causal pathways linking species identity, traits, diversity, and ecosystem functions. Our results show that the interplay of deterministic succession and environmental stochasticity during establishment mediate historical contingencies that cause variation in biodiversity and ecosystem functions, even under otherwise identical assembly conditions.

An explicit attention to history is needed to understand why biodiversity-ecosystem function relationships vary in natural ecosystems: a critical question at the intersection of fundamental theory and applications to environmental change biology and ecosystem restoration.

Keywords: alternative states; colonization; decomposition; floral resources; functional traits; historical contingency; primary productivity; seed dispersal; stochasticity; succession; tallgrass prairie; year effects

Citation

Catano, Christopher P., Anna M. Groves, and Lars A. Brudvig. "Community assembly history alters relationships between biodiversity and ecosystem functions during restoration." Ecology: e3910.