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
复制
发表时间:
2017
期刊:
影响因子:
4.9
通讯作者:
de Mello, W. Z.
de Mello, W. Z.
中科院分区:
农林科学2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.

文献摘要

参考文献

被引文献

相似文献

背景和目的在靠近城市地区的热带森林中,有机氮(N)—铵(NH4+-N)和硝酸盐(NO3—N)—沉积经常超过5-10 kg ha- 1year -1,超过了许多森林类型的临界负荷。我们假设,随着巴西大西洋沿岸大城市(人口约1200万)的临近,大西洋森林的穿透氮通量以及对土壤氮循环和有效性的影响会增加。方法对大西洋沿岸3个森林样地(西南100 km的海洋样地、巴西里约热内卢沿海样地、东北50 km的内陆样地和巴西里约热内卢特大城市下风样地)的降雨和通流氮、土壤养分状况、氮转化和相对氮有效性进行了量化研究。结果年穿透通量不随靠近特大城市而增加,而是沿海洋(7.6±0.3 kg ha-1)→海岸(8.7±1.5 kg ha-1)→内陆(14±2.5 kg ha-1)梯度增加。潜在净氮矿化和硝化速率在不同森林间没有差异。土壤NO3: nh4和树脂袋NO3积累量在高氮点最高。结论降雨和通流氮的增加增加了大西洋森林土壤的相对氮有效性和潜在的no3淋失损失。
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.
APORTE ATMOSFÉRICO DE AMÔNIO, NITRATO E SULFATO EM ARE DE FLORESTA OMBRÓFILA MONTANA NA SERRA DOS ORRGÓOS, RJ
DOI: --
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
跨尺度的氮沉降:加州稀树草原景观中的热点和梯度
DOI: --
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: --
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
大西洋森林中两个流域沉积负荷对比的溶质通量(Serra do Mar/SP-巴西)
DOI: --
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
综合氮捕获模型 (INCA) 应用于巴西圣保罗大西洋森林的热带流域
DOI: --
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