Variable Responses of Lowland Tropical Forest Nutrient Status to Fertilization and Litter Manipulation

Sayer, Emma J.; Wright, S. Joseph; Tanner, Edmund V. J.; Yavitt, Joseph B.; Harms, Kyle E.; Powers, Jennifer S.; Kaspari, Michael; García, M.; Turner, Benjamín L.

doi:10.1007/s10021-011-9516-9

Cited by 104 publications

(99 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…"Available" nutrients, including KCl-extractable ammonium (NH 4 ) and nitrate (NO 3 ) and Mehlich-III extractable P, potassium (K), calcium (Ca), magnesium (Mg) and micronutrients, all changed over 4 years in the upper 2 cm of soil as a result of litter manipulation . After 6 years of litter manipulation, surface soils (0-10 cm) had lower NO 3 and K in litter removal plots and higher NO 3 and Zn in litter addition plots; other nutrients were not significantly affected (Sayer et al, 2012). In Costa Rica after 2.5 years of litter manipulation, surface soils (0-10 cm) had lower net nitrification in both litter removal and addition treatments, while NH 4 concentrations were significantly lower in litter removal plots (NH 4 was 83-91 % of the extractable N; Wieder et al, 2013).…”

Section: Introductionmentioning

confidence: 91%

Changes in soil carbon and nutrients following 6 years of litter removal and addition in a tropical semi-evergreen rain forest

2016

Self Cite

View full text Add to dashboard Cite

Abstract. Increasing atmospheric CO 2 and temperature may increase forest productivity, including litterfall, but the consequences for soil organic matter remain poorly understood. To address this, we measured soil carbon and nutrient concentrations at nine depths to 2 m after 6 years of continuous litter removal and litter addition in a semi-evergreen rain forest in Panama. Soils in litter addition plots, compared to litter removal plots, had higher pH and contained greater concentrations of KCl-extractable nitrate (both to 30 cm); Mehlich-III extractable phosphorus and total carbon (both to 20 cm); total nitrogen (to 15 cm); Mehlich-III calcium (to 10 cm); and Mehlich-III magnesium and lower bulk density (both to 5 cm). In contrast, litter manipulation did not affect ammonium, manganese, potassium or zinc, and soils deeper than 30 cm did not differ for any nutrient. Comparison with previous analyses in the experiment indicates that the effect of litter manipulation on nutrient concentrations and the depth to which the effects are significant are increasing with time. To allow for changes in bulk density in calculation of changes in carbon stocks, we standardized total carbon and nitrogen on the basis of a constant mineral mass. For 200 kg m −2 of mineral soil (approximately the upper 20 cm of the profile) about 0.5 kg C m −2 was "missing" from the litter removal plots, with a similar amount accumulated in the litter addition plots. There was an additional 0.4 kg C m −2 extra in the litter standing crop of the litter addition plots compared to the control. This increase in carbon in surface soil and the litter standing crop can be interpreted as a potential partial mitigation of the effects of increasing CO 2 concentrations in the atmosphere.

show abstract

Section: Introductionmentioning

confidence: 91%

Changes in soil carbon and nutrients following 6 years of litter removal and addition in a tropical semi-evergreen rain forest

2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Previous studies in the Gigante experiment have reported treatment effects on litter N and P (Kaspari et al 2008;Sayer et al 2012;Mayor et al 2014) but have not examined seasonal variation.…”

Section: Seasonal Dynamics Of Soil Organic Mattermentioning

confidence: 99%

“…For example, P addition to a lowland forest in Costa Rica increased soil respiration at rates expected to manifest in a long-term decrease in soil C content . On the other hand, N addition is predicted to increase soil organic C by increasing forest productivity (Sayer et al 2012) and reducing priming effects through a decline in the microbial demand for N from soil organic matter (Nottingham et al 2012). Indeed, the addition of N for several years to tropical forests in Puerto Rico increased soil organic C stocks, primarily in the mineral-associated pool (Cusack et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in soil organic matter after a decade of nutrient addition in a lowland tropical forest

Turner¹,

Yavitt

Harms

et al. 2015

Biogeochemistry

Self Cite

View full text Add to dashboard Cite

Soil organic matter is an important pool of carbon and nutrients in tropical forests. The majority of this pool is assumed to be relatively stable and to turn over slowly over decades to centuries, although changes in nutrient status can influence soil organic matter on shorter timescales. We measured carbon, nitrogen, and phosphorus concentrations in soil organic matter and leaf litter over an annual cycle in a long-term nutrient addition experiment in lowland tropical rain forest in the Republic of Panama. Total soil carbon was not affected by a decade of factorial combinations of nitrogen, phosphorus, or potassium. Nitrogen addition increased leaf litter nitrogen concentration by 7 % but did not affect total soil nitrogen. Phosphorus addition doubled the leaf litter phosphorus concentration and increased soil organic phosphorus by 50 %. Surprisingly, concentrations of carbon, nitrogen, and phosphorus in soil organic matter declined markedly during the four-month dry season, and then recovered rapidly during the following wet season. Between the end of the wet season and the late dry season, total soil carbon declined by 16 %, total nitrogen by 9 %, and organic phosphorus by between 19 % in control plots and 25 % in phosphorus addition plots. The decline in carbon and nitrogen was too great to be explained by changes in litter fall, bulk density, or the soil microbial biomass. However, a major proportion of the dry-season decline in soil organic phosphorus was explained by a corresponding decline in the soil microbial biomass. These results have important implications for our understanding of the stability and turnover of organic matter in tropical forest soils, because they demonstrate that a considerable fraction of the soil organic matter is seasonally transient, despite the overall pool being relatively insensitive to long-term changes in nutrient status.

show abstract

“…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

View full text Add to dashboard Cite

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...

show abstract

Variable Responses of Lowland Tropical Forest Nutrient Status to Fertilization and Litter Manipulation

Cited by 104 publications

References 76 publications

Changes in soil carbon and nutrients following 6 years of litter removal and addition in a tropical semi-evergreen rain forest

Changes in soil carbon and nutrients following 6 years of litter removal and addition in a tropical semi-evergreen rain forest

Seasonal changes in soil organic matter after a decade of nutrient addition in a lowland tropical forest

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

Contact Info

Product

Resources

About