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Coupling coexistence theory to field experiments reveals a complex matching between the species¿ differences modulating diversity and functioning

AutorGodoy, Óscar ; Allan, E.; Pérez-Ramos, Ignacio Manuel ; Matías Resina, Luis; Gómez Aparicio, Lorena
Fecha de publicación31-ene-2017
EditorAsociación Española de Ecología Terrestre
CitaciónAbstract book of the XIV MEDECOS & XIII AEET meeting, pag. 53 (2017)
ResumenEcologists have argued for decades that exist a parallelism between the mechanisms determining species diversity and those driving functioning in a community: stabilizing niche differences underlies the positive complementary effects of diversity on community function, and differences in species’ fitness are related to differences in species’ selection effects. However, recent theoretical advances suggest that this parallelism does not occur, instead, complementarity effects results from the interaction of niche and fitness differences and the same is true for selection effects. We empirically tested these novel predictions by coupling a competition experiment to a diversity-multifunctioning experiment with ten annual plant species. We additionally included an extreme drought treatment to explore how abiotic conditions changes these relationships. We clearly found that more diverse communities produced more biomass, litter was decomposed faster, and soil nutrients were more abundant. Moreover, drought reduced this overall functioning as well as niche and fitness differences between species. Could we then establish that this reduction in multifunctionality was caused by lower niche and fitness differences between species? The answer is no as results revealed a diverse range of relationships. For biomass and soil nutrients, complementarity effects between species pairs were explained only by niche differences and differences in selection effects only by fitness differences, supporting the classical parallelism. For litter decomposition, only complementarity effects were explained by the interaction of niche and fitness differences, partly supporting the novel predictions. Our results suggest that common linkages between the species’ differences modulating diversity and functioning across multiple functions do not occur
DescripciónComunicación oral presentada en the XIV MEDECOS & XIII AEET meeting, Seville, Spain, 31st January - 4th February 2017
Versión del editorhttp://www.medecos-aeet-meeting2017.es/
Aparece en las colecciones: (IRNAS) Comunicaciones congresos
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