%0 Journal Article %1 Dieleman_2012 %A Dieleman, Wouter I. J. %A Vicca, Sara %A Dijkstra, Feike A. %A Hagedorn, Frank %A Hovenden, Mark J. %A Larsen, Klaus S. %A Morgan, Jack A. %A Volder, Astrid %A Beier, Claus %A Dukes, Jeffrey S. %A King, John %A Leuzinger, Sebastian %A Linder, Sune %A Luo, Yiqi %A Oren, Ram %A Angelis, Paolo De %A Tingey, David %A Hoosbeek, Marcel R. %A Janssens, Ivan A. %D 2012 %I Wiley %J Global Change Biology %K face facereview phace %N 9 %P 2681--2693 %R 10.1111/j.1365-2486.2012.02745.x %T Simple additive effects are rare: a quantitative review of plant biomass and soil process responses to combined manipulations of CO2and temperature %U https://doi.org/10.1111%2Fj.1365-2486.2012.02745.x %V 18 %X In recent years, increased awareness of the potential interactions between rising atmospheric CO2 concentrations (CO2) and temperature has illustrated the importance of multifactorial ecosystem manipulation experiments for validating Earth System models. To address the urgent need for increased understanding of responses in multifacto- rial experiments, this article synthesizes how ecosystem productivity and soil processes respond to combined warm- ing and CO2 manipulation, and compares it with those obtained in single factor CO2 and temperature manipulation experiments. Across all combined elevated CO2 and warming experiments, biomass production and soil respiration were typically enhanced. Responses to the combined treatment were more similar to those in the CO2-only treatment than to those in the warming-only treatment. In contrast to warming-only experiments, both the combined and the CO2-only treatments elicited larger stimulation of fine root biomass than of aboveground bio- mass, consistently stimulated soil respiration, and decreased foliar nitrogen (N) concentration. Nonetheless, mineral N availability declined less in the combined treatment than in the CO2-only treatment, possibly due to the warm- ing-induced acceleration of decomposition, implying that progressive nitrogen limitation (PNL) may not occur as commonly as anticipated from single factor CO2 treatment studies. Responses of total plant biomass, especially of aboveground biomass, revealed antagonistic interactions between elevated CO2 and warming, i.e. the response to the combined treatment was usually less-than-additive. This implies that productivity projections might be overesti- mated when models are parameterized based on single factor responses. Our results highlight the need for more (and especially more long-term) multifactor manipulation experiments. Because single factor CO2 responses often dominated over warming responses in the combined treatments, our results also suggest that projected responses to future global warming in Earth System models should not be parameterized using single factor warming experiments.

@article{Dieleman_2012, abstract = {In recent years, increased awareness of the potential interactions between rising atmospheric CO2 concentrations ([CO2]) and temperature has illustrated the importance of multifactorial ecosystem manipulation experiments for validating Earth System models. To address the urgent need for increased understanding of responses in multifacto- rial experiments, this article synthesizes how ecosystem productivity and soil processes respond to combined warm- ing and [CO2] manipulation, and compares it with those obtained in single factor [CO2] and temperature manipulation experiments. Across all combined elevated [CO2] and warming experiments, biomass production and soil respiration were typically enhanced. Responses to the combined treatment were more similar to those in the [CO2]-only treatment than to those in the warming-only treatment. In contrast to warming-only experiments, both the combined and the [CO2]-only treatments elicited larger stimulation of fine root biomass than of aboveground bio- mass, consistently stimulated soil respiration, and decreased foliar nitrogen (N) concentration. Nonetheless, mineral N availability declined less in the combined treatment than in the [CO2]-only treatment, possibly due to the warm- ing-induced acceleration of decomposition, implying that progressive nitrogen limitation (PNL) may not occur as commonly as anticipated from single factor [CO2] treatment studies. Responses of total plant biomass, especially of aboveground biomass, revealed antagonistic interactions between elevated [CO2] and warming, i.e. the response to the combined treatment was usually less-than-additive. This implies that productivity projections might be overesti- mated when models are parameterized based on single factor responses. Our results highlight the need for more (and especially more long-term) multifactor manipulation experiments. Because single factor CO2 responses often dominated over warming responses in the combined treatments, our results also suggest that projected responses to future global warming in Earth System models should not be parameterized using single factor warming experiments. }, added-at = {2019-08-17T20:44:29.000+0200}, author = {Dieleman, Wouter I. J. and Vicca, Sara and Dijkstra, Feike A. and Hagedorn, Frank and Hovenden, Mark J. and Larsen, Klaus S. and Morgan, Jack A. and Volder, Astrid and Beier, Claus and Dukes, Jeffrey S. and King, John and Leuzinger, Sebastian and Linder, Sune and Luo, Yiqi and Oren, Ram and Angelis, Paolo De and Tingey, David and Hoosbeek, Marcel R. and Janssens, Ivan A.}, biburl = {https://www.bibsonomy.org/bibtex/29b8faa6bcaa5f8d4acc06e37d1497899/karinawilliams}, doi = {10.1111/j.1365-2486.2012.02745.x}, interhash = {d0e1dd1d3402dac070bf5c9bd3b3e958}, intrahash = {9b8faa6bcaa5f8d4acc06e37d1497899}, journal = {Global Change Biology}, keywords = {face facereview phace}, month = jun, number = 9, pages = {2681--2693}, publisher = {Wiley}, timestamp = {2019-08-17T20:44:29.000+0200}, title = {Simple additive effects are rare: a quantitative review of plant biomass and soil process responses to combined manipulations of {CO}2and temperature}, url = {https://doi.org/10.1111%2Fj.1365-2486.2012.02745.x}, volume = 18, year = 2012 }