The Biogeochemistry of the Main Forest Vegetation Types in Amazonia

Buscardo, Erika; Nardoto, Gabriela Bielefeld; Luizão, Flávio J.; Piedade, Maria Teresa Fernandez; Schöngart, Jochen; Wittmann, Florian; Doughty, Christopher E.; Quesada, Carlos Alberto; Nagy, László

doi:10.1007/978-3-662-49902-3_11

Cited by 7 publications

(12 citation statements)

References 179 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…80 (range 50–120) kg N ha −1 year −1 , BNF 4–7 kg N ha −1 year −1 and atmospheric deposition c . 12–14 kg N ha −1 year −1 (Buscardo et al., ). The annual total N return per area to soil by animals is yet to be quantified, and probably less than the above values, but is an important and unexplored factor for local N enrichment and soil resource patchiness.…”

Section: Introductionmentioning

confidence: 99%

“…Litter represents internal cycling of N in an ecosystem; animal input through urine is largely part of internal N cycling; however in mixed landscapes, it may also contribute to exchange (input/loss) between ecosystems (Turner & Gardner, 2015); and atmospheric deposition and BNF represent external input. In lowland evergreen rainforests in Amazonia litterfall returns c. 80 (range 50-120) kg N ha −1 year −1 , BNF 4-7 kg N ha −1 year −1 and atmospheric deposition c. 12-14 kg N ha −1 year −1 (Buscardo et al, 2016). The annual total N return per area to soil by animals is yet to be quantified, and probably less than the above values, but is an important and unexplored factor for local N enrichment and soil resource patchiness.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Of mammals and bacteria in a rainforest: Temporal dynamics of soil bacteria in response to simulated N pulse from mammalian urine

et al. 2017

Self Cite

View full text Add to dashboard Cite

Pulse‐type perturbation through excreta by animals creates a mosaic of short‐term high nutrient‐load patches in the soil. How this affects microbial community composition and how long these impacts last are important for microbial community dynamics and nutrient cycling. Our study focused on the short‐term responses to N by bacterial communities and ‘functional groups’ associated with the N cycle in a lowland evergreen tropical rainforest. We applied a single urea pulse, equivalent to urine‐N deposition by medium‐sized mammals to simulate N enrichment and changes in soil N availability, and analysed soil bacterial communities using molecular methods, before and after urea application. Urea addition increased mineral N availability and changed bacterial community composition, from phylum to operational taxonomic unit levels, however, taxon richness and diversity were unaffected. Taxa involved in the physiologically “narrow” processes of nitrification (e.g. Nitrosospira) and denitrification (e.g. Phyllobacteriaceae, Xanthomonadaceae and Comamonadaceae) increased their relative abundance, while N2‐fixers (e.g. Rhodospirillales, and Rhizobiales) decreased after treatment. While a temporal legacy on both community composition and functional group profile was observable 58 and 159 days after treatment, at the latter date bacterial communities were already tending towards pre‐treatment composition. We suggest that pulse‐type perturbation by mammal urine that occurs on a daily basis has strong short‐term effects on patch dynamics of soil microbiota and N availability. Such a spatio‐temporally dynamic soil environment enhances overall microbial richness and diversity, and contributes to the apparent temporal resilience of community composition. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.12998/suppinfo is available for this article.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Of mammals and bacteria in a rainforest: Temporal dynamics of soil bacteria in response to simulated N pulse from mammalian urine

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Por el contrario, la exportación de fósforo disuelto suele ser baja. Los datos revisados por Buscardo et al (2016) indican una exportación de fósforo disuelto en arroyos que oscila entre 0,01 kg/ha/año en un bosque de terra firme (Leopoldo et al 1987) y 0,006 kg P/ha/año en un bosque de tierras altas que bordea un lago inundable (Lesack y Melack 1996). Las exportaciones fueron un orden de magnitud más altas en un bosque montano bajo en Ecuador, alcanzando 0,6 kg/ha/año (Wilcke et al 2008).…”

Section: El Papel De Los Ríos En Los Ciclos Biogeoquímicosunclassified

Capítulo 5: El sistema hidroclimático físico de la Amazonía

Costa¹,

Borma²,

Espinoza³

et al. 2022

Relatório De Avaliação Da Amazônia 2021

View full text Add to dashboard Cite

This chapter reviews the main features and large- to mesoscale mechanisms that contribute to the Amazon’s climate, its inter-annual and inter-decadal variability, and extreme drought and flood events. It examines the effects of extreme events on vegetation and the partitioning of precipitation into evapotranspiration (ET), runoff, flow seasonality, and floodplain dynamics; and describes the floodplain´s role in the biogeochemical cycle.

show abstract

“…While recent literature has emphasised the theoretically important role of horizontal redistribution of phosphorus by the extinct megafauna in neotropical savannas and the rain forests in the Amazon river basin (Doughty et al, 2013) and nutrients in general across ecosystems (Subalusky & Post, 2019), very little is known about the redistribution of primary production and its concentration by contemporary animals within forest ecosystems (Leroux, 2021; Seagle, 2003; Villar et al, 2021). The importance of the redistribution and concentration of nutrients in forest ecosystem is associated with the high concentration of elements in deposited excreta, it being two to three magnitudes higher than that received by annual litterfall input per area (Buscardo et al, 2016; Buscardo, Geml, Schmidt, Freitas, et al, 2018). Thus, deposition of urine or faeces constitutes a pulse disturbance with high local impact.…”

Section: Introductionmentioning

confidence: 99%

“…Amazonia, functional groups, Janzen-Connell hypothesis, pathogens, soil fungal communities, tropical rain forest, urea-N addition with the high concentration of elements in deposited excreta, it being two to three magnitudes higher than that received by annual litterfall input per area (Buscardo et al, 2016;. Thus, deposition of urine or faeces constitutes a pulse disturbance with high local impact.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen pulses increase fungal pathogens in Amazonian lowland tropical rain forests

et al. 2022

Self Cite

View full text Add to dashboard Cite

1. Animals represent an overlooked source of horizontal redistribution of primary production and concentration of elements in ecosystems. For example, the high nutrient concentration of excretions by animals creates a mosaic of short-term nutrient hotspots. However, how this impacts soil microbial communities, especially fungi, and in turn plant species diversity remains little known.2. This study quantified the temporal dynamics of soil mineral nitrogen (N) availability and its relationship with soil fungal community and functional group composition in simulated high-N patches in an Amazonian rain forest. We hypothesised that (H1) changes in local resource dynamics would increase the abundance of pathotrophs and reduce that of saprotrophs and that, (H2) compared with previously reported bacterial community dynamics, fungi would be more resilient after a pulse disturbance event.3. A single urea pulse was applied and the relationship between fungal community composition and functional groups and soil N availability were determined before and twice after the urea treatment.4. An increase in mineral N availability and soil pH two months after the applied urea pulse was found to be associated with significant changes in fungal community composition and the abundance of functional groups. There was a notable decrease in the relative abundance of saprotrophs, accompanied by an increase in plant pathogenic fungi. Five months after the treatment, no differences were detected either in mineral N availability and soil pH or the composition of fungal communities and functional groups between the control and urea treatment. 5.Synthesis. By locally favouring the abundance of plant pathogens, temporally short-lived, but frequent high-N patches created by animal excretions could potentially be involved in maintaining spatially and temporally variable soil

show abstract

The Biogeochemistry of the Main Forest Vegetation Types in Amazonia

Cited by 7 publications

References 179 publications

Of mammals and bacteria in a rainforest: Temporal dynamics of soil bacteria in response to simulated N pulse from mammalian urine

Of mammals and bacteria in a rainforest: Temporal dynamics of soil bacteria in response to simulated N pulse from mammalian urine

Capítulo 5: El sistema hidroclimático físico de la Amazonía

Nitrogen pulses increase fungal pathogens in Amazonian lowland tropical rain forests

Contact Info

Product

Resources

About