Atmospheric organic and inorganic nitrogen inputs to coastal urban and montane Atlantic Forest sites in southeastern Brazil

Souza, Patricia Alexandre de; Ponette‐González, Alexandra G.; Mello, William Zamboni de; Weathers, Kathleen C.; Santos, Isimar A.

doi:10.1016/j.atmosres.2015.03.011

Cited by 32 publications

(20 citation statements)

References 91 publications

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“…Similar to bulk deposition, we found that organic N makes up 35.3 ± 2.9% of total throughfall N inputs across study sites (Table S1 in Supporting Information S1); taking into account organic N increases estimates of total N inputs by 64.7 ± 2.9% across study sites (Table S1 in Supporting Information S1), a result similar to two urban studies in Brazil and Spain (de Souza et al, ; Izquieta‐Rojano et al, ). We did not find any studies conducted in U.S. cities that measured organic N in throughfall to which we could compare our results.…”

Section: Resultssupporting

confidence: 83%

“…The amount of organic N as a proportion of total N (inorganic + organic N) N deposition has been found to be about a third in mostly rural locations across 160 studies worldwide and 58 studies in North America (29% and 35%, respectively; Cornell, ). A similar proportion of organic N in total deposition has also been found in urban areas in studies around the world (Araujo et al, ; Chen et al, ; de Souza et al, ; González‐Benitez et al, ; He et al, ; Izquieta‐Rojano et al, ; Li et al, ; Matsumoto et al, ). There have been a handful of studies in the U.S. measuring organic N deposition in small towns in Connecticut and North Carolina, in winter precipitation in Salt Lake City, Utah and in Miami, Florida; four of these studies either do not report organic N deposition rates or do not report organic rates in the urban sites individually, and the others report the percentage of organic N in total N as below 20% (Brezonik et al, ; Hall et al, ; Keene et al, ; Luo et al, ; Nadim et al, ; Zamora et al, ).…”

Section: Introductionsupporting

confidence: 63%

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Atmospheric Inputs of Nitrogen, Carbon, and Phosphorus across an Urban Area: Unaccounted Fluxes and Canopy Influences

2018

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Rates of atmospheric deposition are declining across the United States, yet urban areas remain hotspots of atmospheric deposition. While past studies show elevated rates of inorganic nitrogen (N) deposition in cities, less is known about atmospheric inputs of organic N, organic carbon (C), and organic and inorganic phosphorus (P), all of which can affect ecosystem processes, water quality, and air quality. Further, the effect of the tree canopy on amounts and forms of nutrients reaching urban ground surfaces is not well‐characterized. We measured growing season rates of total N, organic C, and total P in bulk atmospheric inputs, throughfall, and soil solution around the greater Boston area. We found that organic N constitutes a third of total N inputs, organic C inputs are comparable to rural inputs, and inorganic P inputs are 1.2 times higher than those in sewage effluent. Atmospheric inputs are enhanced two‐to‐eight times in late spring and are elevated beneath tree canopies, suggesting that trees augment atmospheric inputs to ground surfaces. Additionally, throughfall inputs may directly enter runoff when trees extend above impervious surfaces, as is the case with 26.1% of Boston's tree canopy. Our results indicate that the urban atmosphere is a significant source of elemental inputs that may impact urban ecosystems and efforts to improve water quality, particularly in terms of P. Further, as cities create policies encouraging tree planting to provide ecosystem services, locating trees above permeable surfaces to reduce runoff nutrient loads may be essential to managing urban biogeochemical cycling and water quality.

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Section: Resultssupporting

confidence: 83%

Section: Introductionsupporting

confidence: 63%

Atmospheric Inputs of Nitrogen, Carbon, and Phosphorus across an Urban Area: Unaccounted Fluxes and Canopy Influences

2018

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“…Wet N depositions are conditioned by several factors, such as the volume of precipitation and the seasonal influence of emission sources (Alastuey et al, 1999;Cape et al, 2015;Izquieta-Rojano et al, 2016;Liang et al, 2015;Zhan et al, 2015), as well as the chemical and physical N removing processes from the atmosphere (de Souza et al, 2015). In our study, we observed higher wet bulk NO 3 --N depositions in the winter months compared to the summer.…”

Section: Discussionsupporting

confidence: 53%

Bulk deposition of atmospheric inorganic nitrogen in mountainous heathland ecosystems in North-Western Spain

Calvo-Fernández

Marcos

Calvo

2017

Atmospheric Research

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Nitrogen (N) deposition has been identified as one of the main traits of terrestrial ecosystems, affecting their structure and functioning. Among terrestrial ecosystems, heathlands are characterised by low nutrient status and highly affected by N deposition. However, few studies have been developed under natural field conditions to evaluate the amount of N deposition in these ecosystems. Therefore, a field experiment was carried out to investigate the inorganic N inputs in mountainous heathlands of NorthWestern Spain. Two study sites (La Majúa and San Isidro) were selected on the south side of the Cantabrian Mountains, as a representative monitoring N-sensitive ecosystems. Three replicated bulk collectors and one rain gauge were installed at each study site to collect monthly rainwater samples over three years. Wet bulk N deposition was different between the study areas (2.81 kg N ha-1 year-1 in La Majúa and 4.56 kg N ha-1 year-1 in San Isidro), but showed the same temporal pattern, with the highest N deposition rate observed in April and the lowest in August-September. In general, annual wet bulk NO3-N deposition was higher than NH4+-N, reflecting the prevailing NOX emission sources. Depositions of NO3-N were mostly originated by NOX emissions from northern highly industrialized and populated areas of North Spain. The lower NH4+/NO3-ratio in rainwater observed in the study area could be due to the decline of traditional land uses (livestock grazing, heath burning and croplands) associated with NHY emissions. Despite the low rates of N deposition observed in this study, N-sensitive heathlands in NorthWestern Spain could be threatened by N depositions.

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“…This kind of research and data is scarce due to di culties imposed by logistic and costs as continuous data collection and lab analysis are necessary (Levia and Frost 2006). The few initiatives usually take into account only punctual rain events or selected events in a time period (Schroth et al 2001;Tobón et al 2004;Germer et al 2007;Hofhansl et al 2011;Hofhansl et al 2012), speci c periods data like wet seasons (Ciglasch et al 2004;Möller et al 2005;Oziegbe et al 2011), and weekly or each two weeks samplings (Lilienfein and Wilcke 2004;Schwendenmann and Veldkamp 2005;Goller et al 2006;Dezzeo and Chacón 2006;Fujii et al 2009;Souza et al 2015;Neu et al 2016). Moreover, this source of study is particularly scarce for total carbon and total nitrogen concerning Neotropical forests.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal patterns in Carbon and Nitrogen inputs by net precipitation in Atlantic Forest, Brazil

Mantovani

Terra

Mello

et al. 2020

Preprint

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Background Forests are important for governing local and regional water and nutrient dynamics. Thus, studying precipitation-forest interactions is essential to understand the consequences of land-use and climate change for the hydrological and nutrient cycles. This study aimed to quantify the contribution of the net precipitation on Atlantic Forest’s total carbon (C) and total nitrogen (N), identifying potential differences between these chemistry inputs regarding temporal (seasonal and monthly) and spatial scales.Results The rainfall was enriched after crossing the forest canopy. For gross rainfall and net precipitation, respectively, statistical differences were found between annual inputs of carbon (104.13 kg ha− 1 and 193.18 kg ha− 1) and nitrogen (16.81 kg ha− 1 and 36.95 kg ha− 1). Moreover, there was a seasonal variability in the inputs of C and N since 75% occurred in the wet season. November and December concentrated the largest nutrient contribution throughout the year. The spatial variability of C and N was higher in the wet season. Overall, the spatial patterns revealed that the same locations had the highest inputs regardless of the analyzed period.Conclusion Our findings reinforce that forests promote rainfall enrichment with C and N. The forest-rainfall interactions provide constant input of these nutrients, especially in the wet season, being fundamental for maintenance of ecological processes. Despite the nutrient inputs presented some variability, this study provides useful information on the changes of C and N inputs after forest-rainfall interactions. Thus, it can support the estimation of atmospheric deposition and advance the knowledge of the contribution of the leaching and absorption processes by canopies.

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Atmospheric organic and inorganic nitrogen inputs to coastal urban and montane Atlantic Forest sites in southeastern Brazil

Cited by 32 publications

References 91 publications

Atmospheric Inputs of Nitrogen, Carbon, and Phosphorus across an Urban Area: Unaccounted Fluxes and Canopy Influences

Atmospheric Inputs of Nitrogen, Carbon, and Phosphorus across an Urban Area: Unaccounted Fluxes and Canopy Influences

Bulk deposition of atmospheric inorganic nitrogen in mountainous heathland ecosystems in North-Western Spain

Spatial and temporal patterns in Carbon and Nitrogen inputs by net precipitation in Atlantic Forest, Brazil

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