Effects of nitrogen and phosphorus fertilization in a lowland evergreen rainforest

Mirmanto, E.; Proctor, James D.; Green, J.; Nagy, László; Suriantata,

doi:10.1142/9781848160125_0009

Cited by 52 publications

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“…We did observe decreased live fine root biomass and increased dead fine root biomass in fertilized versus control plots, which may indicate either direct effects of N on belowground root growth/turnover, or a secondary effect of N fertilization on belowground plant dynamics (e.g., base cation mobilization (Mitchell and Smethurst 2008)). Overall, our results agree with previous studies at similar sites, which suggest that aboveground NPP in mature tropical wet forests on highly weathered soils is not likely limited by N (Harrington et al 2001;Kaspari et al 2008;Mirmanto et al 1999).…”

Section: Discussionsupporting

confidence: 92%

“…Outside of forests on young Hawaiian soils, the results in LeBauer and Treseder (2008) are strongly influenced by responses in dry tropical forests (Campo and Vazquez-Yanes 2004), early successional humid forests (Davidson et al 2004), and high elevation ([2000 masl) tropical forests (Tanner et al 1992). For a mature Indonesian lowland tropical forest on highly weathered soils included in the review, NPP did not respond to N fertilization (Mirmanto et al 1999), and a Hawaiian study on old, highly weathered soils also did not observe a response of NPP to N fertilization (Harrington et al 2001). Similarly, litterfall productivity did not respond to N fertilization in a moist Panamanian forest on Oxisols (Kaspari et al 2008).…”

Section: Discussionmentioning

confidence: 96%

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Effects of nitrogen additions on above- and belowground carbon dynamics in two tropical forests

et al. 2010

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Anthropogenic nitrogen (N) deposition is increasing rapidly in tropical regions, adding N to ecosystems that often have high background N availability. Tropical forests play an important role in the global carbon (C) cycle, yet the effects of N deposition on C cycling in these ecosystems are poorly understood. We used a field N-fertilization experiment in lower and upper elevation tropical rain forests in Puerto Rico to explore the responses of above-and belowground C pools to N addition. As expected, tree stem growth and litterfall productivity did not respond to N fertilization in either of these Nrich forests, indicating a lack of N limitation to net primary productivity (NPP). In contrast, soil C concentrations increased significantly with N fertilization in both forests, leading to larger C stocks in fertilized plots. However, different soil C pools responded to N fertilization differently. Labile (low density) soil C fractions and live fine roots declined with fertilization, while mineral-associated soil C increased in both forests. Decreased soil CO 2 fluxes in fertilized plots were correlated with smaller labile soil C pools in the lower elevation forest (R 2 = 0.65, p \ 0.05), and with lower live fine root biomass in the upper elevation forest (R 2 = 0.90, p \ 0.05). Our results indicate that soil C storage is sensitive to N deposition in tropical forests, even where plant productivity is not N-limited. The mineral-associated soil C pool has the potential to respond relatively quickly to N additions, and can drive increases in bulk soil C stocks in tropical forests.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 96%

Effects of nitrogen additions on above- and belowground carbon dynamics in two tropical forests

et al. 2010

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“…Estas observaciones contradicen en estos bosques (escala local), lo planteado en la hipótesis de la limitación de la PPN generada por el P en bosques tropicales de baja altitud (escala global) (Vitousek 1984, Silver 1994, Paoli et al 2005, Paoli y Curran 2007, Aragão et al 2009). Probablemente, lo que se está evidenciando en los bosques de Opogodó y Pacurita es una limitación de la PPN generada por múltiples macro y micro nutrientes y otras propiedades del suelo; esto es similar a lo reportado por Mirmanto et al (1999) y Kaspari et al (2008) quienes observaron incrementos en PPN hojarasca con la adición de N y P al suelo.…”

Section: Parámetrosunclassified

“…Si bien varios estudios han reportado variación en la PPN hojarasca con la disponibilidad de nutrientes (Vitousek 1984, Aragão et al 2009), ello es detectable solamente cuando existe un verdadero gradiente de fertilidad generado con la comparación de bosques tropicales con diferente concentración de nutrientes (Silver 1994), como lo reportaron Aragão et al (2009), quienes para evaluar la relación entre la PPN y el suelo en la Amazonia utilizaron un rango de disponibilidad edáfica de P de entre 7,3-80,0 ppm. Asimismo, el gradiente de fertilidad se puede inducir experimentalmente mediante la aplicación de nutrientes y fertilizantes al suelo (Mirmanto et al 1999;Kaspari et al 2008;Sayer et al 2012), lo cual no se hizo en el presente estudio. Segundo, la magnitud y patrones espaciales de PPN hojarasca en ecosistemas boscosos están determinados por factores biológicos tales como especie arbórea, tasas de crecimiento, edad, área basal, densidad y particulares del dosel (Bray y Gorham 1964).…”

Section: Parámetrosunclassified

Relación entre la producción de hojarasca y las condiciones edáficas en bosques pluviales tropicales del Chocó Biogeográfico, Colombia

2017

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ResumenLa producción de hojarasca (PPN hojarasca ) es uno de los principales componentes de la productividad primaria neta (PPN) en ecosistemas boscosos. Dicha PPN hojarasca está determinada considerablemente por las condiciones edáficas en bosques lluviosos tropicales. Para evaluar esta hipótesis se establecieron cinco parcelas permanentes de una hectárea en dos bosques de Opogodó y Pacurita (Chocó), Colombia, donde se determinó la PPN hojarasca mediante 125 recolectores que se evaluaron mensualmente durante un año. Además, se midieron los parámetros básicos de fertilidad edáfica, y se relacionaron con la PPN hojarasca . Se observó que ambos bosques presentaron suelos pobres en nutrientes, pero con mayor contenido de arena, N total y materia orgánica (MO) en Opogodó. La PPN hojarasca fue similar en ambos bosques (7,82 t ha -1 año -1 en Opogodó, y 7,35 t ha -1 año -1 en Pacurita). Asimismo, los componentes con mayor aporte fueron las hojas (>60%), tallos (19%) y miscelánea (14%). La PPN hojarasca total presentó correlación negativa débil con el porcentaje de limo edáfico. Mientras la producción de hojas se asoció positivamente con el contenido de arena, pH, MO y N total, la relación fue negativa con el aluminio (Al), la capacidad de intercambio catiónico efectiva (CICE) y limo. En general, las correlaciones entre la PPN hojarasca y los parámetros edáficos fueron débiles; al parecer, por la poca variación en la fertilidad y la baja disponibilidad de algunos nutrientes (Fósforo y Calcio) del suelo. Por lo tanto, se confirmó débilmente la hipótesis de la limitación por fertilidad del suelo de la PPN en los bosques del Chocó. Palabras claves: Productividad primaria neta, Nitrógeno, Fósforo, Limitación de nutrientes AbstractLitter production (NPP litterfall ) is one of the main components of net primary productivity (NPP) in forest ecosystems. Such NPP litterfall is determined considerably by the soil conditions in tropical rainforests. To evaluate this hypothesis five 1-ha permanent plots were established in two forests of Chocó (Opogodó and Pacurita) where NPP litterfall was measured in 125 collectors, monthly-monitored for a year. In addition, basic soil-fertility parameters were measured and related to the NPP litterfall . It was observed that both forests exhibited nutrient-poor soils, but with higher sand content, total N and organic matter (OM) in Opogodó. The NPP litterfall was similar in both forests (7.82 t ha -1 yr -1 in Opogodó, and 7.35 t ha -1 yr -1 in Pacurita). Also, the litter-fall components with greatest contribution were leaves (> 60%), stems (19%) and miscellaneous (14%). Total NPP litterfall showed a weak negative correlation with the percentage of silt. Leaf litter production was positively associated with sand content, pH, O.M. and total nitrogen; whereas, it was negatively correlated with aluminum (Al), effective cation exchange capacity (ECEC) and silt. In general, correlations between NPP litterfall and soil parameters were weak, apparently due to the small variation in soil fertility and l...

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“…Otherwise, when nutrients are added and there is no response, the interpretation is that the added nutrient was not limiting (Vitousek 2004). The most comprehensive tropical nutrient addition experiments have occurred as stand-level fertilization with nitrogen (N), phosphorus (P), and/or potassium (K) in large (up to 40 9 40 m) plots (Tanner et al 1992;Vitousek et al 1993;Mirmanto et al 1999;Newbery et al 2002;Campo and Vázquez-Yanes 2004;Davidson et al 2004;Lu et al 2010;Wright et al 2011;Á lvarez-Clare et al 2013;Fisher et al 2013). These large experiments are especially valuable because they allow researchers to evaluate nutrient limitation at scales ranging from leaf-level physiology to whole-tree growth, as well as ecosystem-scale processes such as litterfall and nutrient cycling.…”

Section: Introductionmentioning

confidence: 99%

Nutrient limitation of eco-physiological processes in tropical trees

Santiago

2015

Trees

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Key Message Tropical forests play a disproportionately large role in the global climate system, yet the extent to which nutrients limit the potential for tropical trees to increase carbon gain as atmospheric carbon dioxide rises is unknown. Abstract This review focuses on what is known about tropical tree responses to experimental nutrient addition and how such information is critical for developing a more complete picture of the ability of tropical forest to respond to a changing world. Most of our knowledge of nutrient limitation of eco-physiological processes in tropical trees is derived from stand-scale nutrient addition experiments, in which physiological or growth responses signify limitation by that element. Our knowledge is further supplemented by fertilization studies of individual plants in pots. There is emerging evidence that fine root biomass decreases and maximum photosynthetic rates, water transport capacity and plant growth in tropical trees increase with nutrient addition, but the magnitude of response depends upon the successional status of the species, the size of the individual, light availability and the element in question. The sheer variation in responses of tropical trees to nutrient addition calls for a more complete evaluation across tropical environments.

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Effects of nitrogen and phosphorus fertilization in a lowland evergreen rainforest

Cited by 52 publications

References 0 publications

Effects of nitrogen additions on above- and belowground carbon dynamics in two tropical forests

Effects of nitrogen additions on above- and belowground carbon dynamics in two tropical forests

Relación entre la producción de hojarasca y las condiciones edáficas en bosques pluviales tropicales del Chocó Biogeográfico, Colombia

Nutrient limitation of eco-physiological processes in tropical trees

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