Species interactions amplify functional group responses to elevated CO2 and N enrichment in a 24-year grassland experiment

© 2024 The Author(s). Global Change Biology published by John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 30(2024), 8 vom: 16. Aug., Seite e17476
1. Verfasser: Mohanbabu, Neha (VerfasserIn)
Weitere Verfasser: Isbell, Forest, Hobbie, Sarah E, Reich, Peter B
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article BioCON FACE experiment herbaceous long‐term resource addition temperate grassland Carbon Dioxide 142M471B3J Nitrogen N762921K75
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520 |a Plant functional groups (FGs) differ in their response to global changes, although species within those groups also vary in such responses. Both species and FG responses to global change are likely influenced by species interactions such as inter-specific competition and facilitation, which are prevalent in species mixtures but not monocultures. As most studies focus on responses of plants growing in either monocultures or mixtures, but rarely both, it remains unclear how interspecific interactions in diverse ecological communities, especially among species in different FGs, modify FG responses to global changes. To address these issues, we leveraged data from a 16-species, 24-year perennial grassland experiment to examine plant FG biomass responses to atmospheric CO2, and N inputs at different planted diversity. FGs differed in their responses to N and CO2 treatments in monocultures. Such differences were amplified in mixtures, where N enrichment strongly increased C3 grass success at ambient CO2 and C4 grass success at elevated CO2. Legumes declined with N enrichment in mixtures at both CO2 levels and increased with elevated CO2 in the initial years of the experiment. Our results suggest that previous studies that considered responses to global changes in monocultures may underestimate biomass changes in diverse communities where interspecific interactions can amplify responses. Such effects of interspecific interactions on responses of FGs to global change may impact community composition over time and consequently influence ecosystem functions 
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700 1 |a Isbell, Forest  |e verfasserin  |4 aut 
700 1 |a Hobbie, Sarah E  |e verfasserin  |4 aut 
700 1 |a Reich, Peter B  |e verfasserin  |4 aut 
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