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@ARTICLE{Kbert:889762,
author = {Kübert, Angelika and Kuester, Emma and Götz, Miriam and
Dubbert, David and Eiblmeier, Monika and Werner, Christiane
and Rothfuss, Youri and Dubbert, Maren},
title = {{C}ombined experimental drought and nitrogen loading: the
role of species dependent leaf level control of carbon and
water exchange in a temperate grassland},
journal = {Plant biology},
volume = {23},
number = {3},
issn = {1438-8677},
address = {Oxford [u.a.]},
publisher = {Wiley- Blackwell},
reportid = {FZJ-2021-00376},
pages = {427-437},
year = {2021},
abstract = {Nitrogen (N) loading and extreme drought were found to
strongly alter biomass production, species composition,
carbon and water fluxes of temperate grasslands. Such
changes at the community level are often attributed to
species and functional group‐specific responses in
phenology and/or physiology. In a multifactorial field
experiment, we studied the responses of three abundant
grassland species (forb Centaurea jacea, grasses
Arrhenatherum elatius and Dactylis glomerata) to N loading
and extreme drought, focusing on responses in carbon and
water relations at the leaf level. We analyzed 1) changes in
bulk leaf N (uptake efficiency of additional N), 2)
adaptation of plant water status (leaf water potential) and
3) the impact on leaf carbon and water fluxes. We observed
more efficient N utilization in both grasses compared to C.
jacea. Naturally occurring summer drought impacted the plant
water status of all species significantly while extreme
drought treatment only affected water status additionally
during and after summer drought. C. jacea was able to
maintain much lower leaf water potentials compared to
grasses during drought. Despite these clear
species‐specific responses to N loading and drought in
bulk, species were able to maintain homeostasis of leaf
carbon and water fluxes. Thus, strong declines in the
(community) carbon sequestration observed at this site
during the (natural) summer drought were not related to leaf
physiological responses in assimilation but driven by
phenological adaptions of the species community: The drought
sensitive grasses, even though exhibiting a higher N uptake
efficiency, responded with a shortened life cycle to severe
summer drought.},
cin = {IBG-3},
ddc = {580},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
pubmed = {33338294},
UT = {WOS:000611654700001},
doi = {10.1111/plb.13230},
url = {https://juser.fz-juelich.de/record/889762},
}