It is unclear how elevated CO2 (eCO2) and the corresponding shifts in temperature and precipita-
tion will interact to impact ecosystems over time. During a 7-year experiment in a semi-arid grass-
land, the response of plant biomass to eCO2 and warming was largely regulated by interannual
precipitation, while the response of plant community composition was more sensitive to experi-
ment duration. The combined effects of eCO2 and warming on aboveground plant biomass were
less positive in ‘wet’ growing seasons, but total plant biomass was consistently stimulated by
~ 25% due to unique, supra-additive responses of roots. Independent of precipitation, the com-
bined effects of eCO2 and warming on C3 graminoids became increasingly positive and supra-
additive over time, reversing an initial shift toward C4 grasses. Soil resources also responded
dynamically and non-additively to eCO2 and warming, shaping the plant responses. Our results
suggest grasslands are poised for drastic changes in function and highlight the need for long-term,
factorial experiments.
%0 Journal Article
%1 Mueller_2016
%A Mueller, K. E.
%A Blumenthal, D. M.
%A Pendall, E.
%A Carrillo, Y.
%A Dijkstra, F. A.
%A Williams, D. G.
%A Follett, R. F.
%A Morgan, J. A.
%D 2016
%E Penuelas, Josep
%I Wiley
%J Ecology Letters
%K FACE PHACE
%N 8
%P 956--966
%R 10.1111/ele.12634
%T Impacts of warming and elevated CO2
on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time
%U https://doi.org/10.1111%2Fele.12634
%V 19
%X It is unclear how elevated CO2 (eCO2) and the corresponding shifts in temperature and precipita-
tion will interact to impact ecosystems over time. During a 7-year experiment in a semi-arid grass-
land, the response of plant biomass to eCO2 and warming was largely regulated by interannual
precipitation, while the response of plant community composition was more sensitive to experi-
ment duration. The combined effects of eCO2 and warming on aboveground plant biomass were
less positive in ‘wet’ growing seasons, but total plant biomass was consistently stimulated by
~ 25% due to unique, supra-additive responses of roots. Independent of precipitation, the com-
bined effects of eCO2 and warming on C3 graminoids became increasingly positive and supra-
additive over time, reversing an initial shift toward C4 grasses. Soil resources also responded
dynamically and non-additively to eCO2 and warming, shaping the plant responses. Our results
suggest grasslands are poised for drastic changes in function and highlight the need for long-term,
factorial experiments.
@article{Mueller_2016,
abstract = {It is unclear how elevated CO2 (eCO2) and the corresponding shifts in temperature and precipita-
tion will interact to impact ecosystems over time. During a 7-year experiment in a semi-arid grass-
land, the response of plant biomass to eCO2 and warming was largely regulated by interannual
precipitation, while the response of plant community composition was more sensitive to experi-
ment duration. The combined effects of eCO2 and warming on aboveground plant biomass were
less positive in ‘wet’ growing seasons, but total plant biomass was consistently stimulated by
~ 25% due to unique, supra-additive responses of roots. Independent of precipitation, the com-
bined effects of eCO2 and warming on C3 graminoids became increasingly positive and supra-
additive over time, reversing an initial shift toward C4 grasses. Soil resources also responded
dynamically and non-additively to eCO2 and warming, shaping the plant responses. Our results
suggest grasslands are poised for drastic changes in function and highlight the need for long-term,
factorial experiments.
},
added-at = {2019-08-17T20:36:35.000+0200},
author = {Mueller, K. E. and Blumenthal, D. M. and Pendall, E. and Carrillo, Y. and Dijkstra, F. A. and Williams, D. G. and Follett, R. F. and Morgan, J. A.},
biburl = {https://www.bibsonomy.org/bibtex/23d8308cd9d5458b54a8d4a77db7063ab/karinawilliams},
doi = {10.1111/ele.12634},
editor = {Penuelas, Josep},
interhash = {ae9d40f2942c5caefee5cb65251b8b43},
intrahash = {3d8308cd9d5458b54a8d4a77db7063ab},
journal = {Ecology Letters},
keywords = {FACE PHACE},
month = jun,
number = 8,
pages = {956--966},
publisher = {Wiley},
timestamp = {2019-08-17T20:36:35.000+0200},
title = {Impacts of warming and elevated {CO}2
on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time},
url = {https://doi.org/10.1111%2Fele.12634},
volume = 19,
year = 2016
}