Nitrogen cycling in tropical Atlantic Forest differing in exposure to urban atmospheric nitrogen deposition
Nitrogen cycling in tropical Atlantic Forest differing in exposure to urban atmospheric nitrogen deposition
复制标题
热带大西洋森林的氮循环因暴露于城市大气氮沉降而不同
DOI:
10.1007/s11104-017-3421-8
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发表时间:
2017
期刊:
影响因子:
4.9
通讯作者:
de Mello, W. Z.
中科院分区:
文献类型:
--
作者:
Ponette-González, A. G.;Perroni, Y.;Weathers, K. C.;de Souza, P. A.;García-Oliva, F.;de Mello, W. Z.
Background and aimsInorganic nitrogen (N)––ammonium (NH4+-N) and nitrate (NO3--N)––deposition to tropical forests near urban areas frequently exceeds 5-10 kg ha-1yr-1, surpassing critical loads for many forest types. We hypothesized that throughfall N fluxes to Atlantic Forest and effects on soil N cycling and availability would increase with proximity to a megacity (population ~12 M) on Brazil’s Atlantic Coast.MethodsWe quantified N in rainfall and throughfall, soil nutrient status and N transformations, and relative N availability in three Atlantic Forest sites: an oceanic site ~100 km southwest, a coastal site in, and an inland site ~50 km northeast and downwind from Rio de Janeiro megacity.ResultsAnnual throughfall N flux did not increase with proximity to the megacity but increased along an ocean (7.6 ± 0.3 kg ha-1) to coast (8.7 ± 1.5 kg ha-1) to inland (14 ± 2.5 kg ha-1) gradient. Potential net N mineralization and nitrification rates did not differ among forests. However, NO3:NH4and resin bag NO3-accumulation in soil were highest at the high-N site.ConclusionsOur results suggest that elevated rainfall and throughfall N increase relative N availability and potential NO3-leaching losses from Atlantic Forest soils downwind urban areas.
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DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
Renato De Aragão Ribeiro Rodrigues;W. Z. D. Mello;Patrícia Alexandre de Souza
通讯作者:
Patrícia Alexandre de Souza
DOI:
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发表时间:
2015
期刊:
影响因子:
--
作者:
Elise M. Tulloss;M. Cadenasso
通讯作者:
M. Cadenasso
DOI:
--
发表时间:
2008
期刊:
影响因子:
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作者:
É. D. S. Martins;O. Junior;V. V. D. Souza;A. F. C. Júnior;S. Oliveira;R. A. T. Gomes;A. Reatto
通讯作者:
A. Reatto
DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
M. Forti;C. Bourotte;V. Cicco;F. Arcova;M. Ranzini
通讯作者:
M. Ranzini
DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
Maurício Ranzini;M. Forti;P. Whitehead;F. Arcova;V. Cicco;A. Wade
通讯作者:
A. Wade