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@ARTICLE{Templer:908764,
author = {Templer, P. H. and Harrison, J. L. and Pilotto, F. and
Flores-Díaz, A. and Haase, P. and McDowell, W. H. and
Sharif, R. and Shibata, H. and Blankman, D. and Avila, A.
and Baatar, U. and Bogena, Heye and Bourgeois, I. and
Campbell, J. and Dirnböck, T. and Dodds, W. K. and Hauken,
M. and Kokorite, I. and Lajtha, K. and Lai, I.-L. and
Laudon, H. and Lin, T. C. and Lins, S. R. M. and Meesenburg,
H. and Pinho, P. and Robison, A. and Rogora, M. and Scheler,
B. and Schleppi, P. and Sommaruga, R. and Staszewski, T. and
Taka, M.},
title = {{A}tmospheric deposition and precipitation are important
predictors of inorganic nitrogen export to streams from
forest and grassland watersheds: a large-scale data
synthesis},
journal = {Biogeochemistry},
volume = {1},
issn = {0168-2563},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V.},
reportid = {FZJ-2022-02820},
pages = {23},
year = {2022},
abstract = {Previous studies have evaluated how changes in atmospheric
nitrogen (N) inputs and climate affect stream N
concentrations and fluxes, but none have synthesized data
from sites around the globe. We identified variables
controlling stream inorganic N concentrations and fluxes,
and how they have changed, by synthesizing 20 time series
ranging from 5 to 51 years of data collected from forest and
grassland dominated watersheds across Europe, North America,
and East Asia and across four climate types (tropical,
temperate, Mediterranean, and boreal) using the
International Long-Term Ecological Research Network. We
hypothesized that sites with greater atmospheric N
deposition have greater stream N export rates, but that
climate has taken a stronger role as atmospheric deposition
declines in many regions of the globe. We found declining
trends in bulk ammonium and nitrate deposition, especially
in the longest time-series, with ammonium contributing
relatively more to atmospheric N deposition over time. Among
sites, there were statistically significant positive
relationships between (1) annual rates of precipitation and
stream ammonium and nitrate fluxes and (2) annual rates of
atmospheric N inputs and stream nitrate concentrations and
fluxes. There were no significant relationships between air
temperature and stream N export. Our long-term data shows
that although N deposition is declining over time,
atmospheric N inputs and precipitation remain important
predictors for inorganic N exported from forested and
grassland watersheds. Overall, we also demonstrate that
long-term monitoring provides understanding of ecosystems
and biogeochemical cycling that would not be possible with
short-term studies alone.},
cin = {IBG-3},
ddc = {550},
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},
UT = {WOS:000827380500001},
doi = {10.1007/s10533-022-00951-7},
url = {https://juser.fz-juelich.de/record/908764},
}