title: Experimental evidence that evolutionarily diverse assemblages result in higher productivity.
abstract: There now is ample experimental evidence that speciose assemblages are more productive and provide a greater amount of ecosystem services than depauperate ones. However, these experiments often conclude that there is a higher probability of including complementary species combinations in assemblages with more species and lack a priori prediction about which species combinations maximize function. Here, I report the results of an experiment manipulating the evolutionary relatedness of constituent plant species across a richness gradient. I show that assemblages with distantly related species contributed most to the higher biomass production in multispecies assemblages, through species complementarity. Species produced more biomass than predicted from their monocultures when they were in plots with distantly related species and produced the amount of biomass predicted from monoculture when sown with close relatives. This finding suggests that in the absence of any other information, combining distantly related species in restored or managed landscapes may serve to maximize biomass production and carbon sequestration, thus merging calls to conserve evolutionary history and maximize ecosystem function.
authors.affiliation: Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON, Canada M1C 1A4. mcadotte@utsc.utoronto.ca
authors.forename: Marc W
authors.initials: MW
authors.lastname: Cadotte
mesh_terms: D044822:Biodiversity; D005075:Biological Evolution; D018533:Biomass; D058448:Biota; D057965:Carbon Sequestration / Q000502:physiology; D019295:Computational Biology; D016013:Likelihood Functions; D016014:Linear Models; D019684:Magnoliopsida / Q000254:growth & development*; D008957:Models, Genetic; D009864:Ontario; D010802:Phylogeny; D013045:Species Specificity
keywords: biodiversity; phylogenetic diversity; transgressive overyielding