Export of dissolved and undissolved nutrients from forested catchments in Peninsular Malaysia

Yusop, Zulkifli; Douglas, Ian; Nik, Abdul Rahim

doi:10.1016/j.foreco.2005.12.006

Cited by 34 publications

(22 citation statements)

References 50 publications

(64 reference statements)

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“…It has also been suggested that concentrations are different between storm 632 M. CHIWA ET AL. and low flow periods for NO 3 (Edwards, 1973;Muraoka and Hirata, 1988;Ávila et al, 1992;Murdoch and Stoddard, 1993;Creed and Band, 1998;Ohrui and Mitchell, 1998;McHale et al, 2000;Butturini and Sabater, 2002;Yusop et al, 2006) and SO 4 2 (Edwards, 1973;Ávila et al, 1992). Therefore, estimates of DIN and SO 4 2 exports that were extrapolated from concentrations during low flow periods and storms would be biased, unless the relationship between discharge and DIN or SO 4 2 concentration in stream water was similar between the low and storm flow periods.…”

Section: Introductionmentioning

confidence: 99%

Effects of storm flow samplings on the evaluation of inorganic nitrogen and sulfate budgets in a small forested watershed

Chiwa

Ide

Maruno

et al. 2009

Hydrological Processes

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Abstract:To investigate the effects of storm flow samplings on the evaluation of DIN and SO 4 2 budgets, we conducted storm flow samplings and discrete interval (weekly) samplings of stream water, throughfall, and stemflow. This investigation lasted for three years and took place in a small forested watershed in western Japan. Annual exports were calculated by the sum of the load (L total )-sum of the discharge (Q total ) relationships obtained by storm flow samplings. These were then compared to calculated ones that were based on LQ relationships obtained by discrete interval sampling. The results of discrete interval sampling showed that the relationships of DIN or SO 4 2 concentration to the discharge amount found in stream water differed from those of storm flow sampling. This was especially notable in years with higher annual precipitation and subsequent higher annual discharges. Also, exports of DIN and SO 4 2 during storm flow periods accounted for 83% and 78% of annual exports on 3-year averages, respectively. These results confirmed that storm flow samplings are essential for estimating annual exports of DIN and SO 4 2 . Annual exports that were calculated based on just discrete interval sampling (46% and 17%, respectively) overestimated DIN and SO 4 2 from discrete interval and storm flow samplings on a 3-year average. These overestimates were pronounced in years of higher discharge, and critically affected the rates of net-retention or export of DIN and SO 4 2 . The relationship of smaller input than output of DIN was reversed if storm flow sampling was included.

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Section: Introductionmentioning

confidence: 99%

Effects of storm flow samplings on the evaluation of inorganic nitrogen and sulfate budgets in a small forested watershed

Chiwa

Ide

Maruno

et al. 2009

Hydrological Processes

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“…In recent years, the frequency of heavy rainfalls has increased (Iwashima and Yamamoto 1993). The heavy rainfalls generate fl oods and consequently induce large nutrient loss from the forested mountains through surface soil erosion (Eyre and Pont 2003;Hatch et al 2001;Takeda 2002a, b, c;Yusop et al 2006). However, runoff nutrient loads from forested mountains, which cover about 68% of the archipelago, have not been completely elucidated (Inoue 2003), because dangerous and laborious sampling conditions hinder the measurement of the large nutrient loss during fl oods (Kunimatsu 1994).…”

Section: Introductionmentioning

confidence: 99%

Effects of discharge level on the load of dissolved and particulate components of stream nitrogen and phosphorus from a small afforested watershed of Japanese cypress (Chamaecyparis obtusa)

Ide

Nagafuchi

Chiwa

et al. 2007

Journal of Forest Research

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Effects of discharge level on the load of dissolved and particulate components of stream nitrogen and phosphorus from a small afforested watershed of Japanese cypress (Chamaecyparis obtusa) Abstract The behavior of dissolved and particulate components of stream nitrogen (N) and phosphorus (P) were measured for 2 years in a small mountainous watershed covered primarily with a plantation forest of Japanese cypress (Chamaecyparis obtusa). The load of dissolved N and P bore a consistent relationship to discharge while the load of particulate N and P varied by up to two orders of magnitude at a given discharge level. Most N was exported in a dissolved form (DN) while most P was exported in a particulate form (PP), which bears similarity to loads from agricultural watersheds. Owing to the different behaviors of DN and PP, changes in the total nitrogen (TN) load were primarily attributed to variations in discharge unlike changes in the total phosphorus (TP) load. High fl ow conditions, resulting from heavy rainfall, displayed PP release significantly larger than expected. The TP load in high fl ow conditions was severely underestimated using a regression equation expressed as a function of discharge, which was based on the weekly sampling data biased toward low fl ow conditions. In addition, the TN load during peak discharges in heavy rain events was underestimated by the regression equation because of unpredictable increases in the particulate component. Our study shows that the particulate component ratio determines whether discharge can explain changes in load regardless of chemical species. The results suggest that plantation forests in rainy regions can be a diffuse source of particulate nutrients depending on soil surface conditions.

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“…Clearcutting temporarily prevents nutrient uptake by vegetation, while decomposition proceeds and increases the amount of available nutrients in the dissolved fraction of soil solution (Hornbeck et al, 1986;Yusop et al, 2006). Greater amounts of soil water resulting from reduced interception and transpiration provide a means of transport to streams (Brooks et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Soil erosion losses after harvesting of eucalypt stands (Fernández et al, 2004) have also been evaluated, but the nutrient exports in streamwater after harvesting or thinning have not been evaluated. A complete assessment of nutrient export from forested catchments is crucial as a basis for managing long-term site fertility (Yusop et al, 2006), and for preserving the quality of dependent ecosystems, particularly aquatic ecosystems (Ranger and Turpault, 1999).…”

Section: Introductionmentioning

confidence: 99%

Effects of the sequence wildfire-harvesting-coppice sprout selection on nutrient export via streamfloe in a small E. globulus watershed in Galicia (NW Spain)

Fernández¹,

Vega²,

Bará³

et al. 2011

For. syst.

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Water yield and nutrient exports via streamflow were monitorized for twelve years (1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999) in a small experimental E. globulus watershed subjected to intensive forest management in the NW of Spain. During the period of study the watershed was severely affected by a wildfire and this gave the opportunity to evaluate the influence of this perturbation and the subsequent clearcutting and thinning, on the nutrient exports via streamflow.The wildfire caused a significant increase in nutrient exports in streamflow during the first two following years while no significant effect was observed the third year after wildfire. After clearfelling, inputs via precipitation compensated for nutrient exports in streamflow, except for K the first year following harvest and NO 3 -during the three years after this operation. Thinning had less effect on nutrient exports than wildfire or harvest.Increased nutrient concentrations in streamflow and imbalances did not last in time, although dissolved nutrient losses measured in this study threaten forest sustainability in these plantations in intensively managed plantations growing in low fertility soils. Consequently, wildfire being the triggering perturbation for subsequent nutrient loss, fire preventive actions are critical for the sustainability of these stands.Key words: forest fire; clearcutting; solute loss; atmospheric input. ResumenEfectos de la secuencia incendio-corta a hecho-selección de brotes en la pérdida de nutrientes por escorrentía en una cuenca experimental de E. globulus en Galicia (NW de España)La producción de agua y la salida de nutrientes por escorrentía fueron monitorizadas durante doce años (1987-1999) en una pequeña cuenca experimental de E. globulus en el NW de España. Durante el período de estudio la cuenca fue afectada por un incendio, lo que brindó la oportunidad de evaluar la influencia de esa perturbación y la corta a hecho y selección de brotes subsigueinte, sobre la salida de nutrientes por escorrentía.El incendio causó un aumento significativo de las pérdidas de nutrientes por escorrentía durante los dos años siguientes mientras que no fue apreciable ningún efecto al tercer año del incendio. Después de la corta a hecho del arbolado quemado, las entradas por precipitación compensaron las pérdidas por escorrentía, a excepción del K el primer año después de esta operación y del NO 3 -durante los tres años siguientes. La selección de brotes tuvo un efecto mucho menor en las pérdidas de nutrientes por escorrentía que el incendio o la corta.Los aumentos de las concentraciones y las desviaciones en los balances de nutrientes no fueron duraderos en el tiempo, sin embargo las pérdidas de nutrientes por escorrentía evaluadas en este estudio, podrían comprometer la sostenibilidad de estas plantaciones sometidas a un manejo intensivo en suelos de baja fertilidad. Por tanto, ya que el incendio es la perturbación desencadenante del aumento de nutrientes subsiguiente, son necesarias accion...

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Export of dissolved and undissolved nutrients from forested catchments in Peninsular Malaysia

Cited by 34 publications

References 50 publications

Effects of storm flow samplings on the evaluation of inorganic nitrogen and sulfate budgets in a small forested watershed

Effects of storm flow samplings on the evaluation of inorganic nitrogen and sulfate budgets in a small forested watershed

Effects of discharge level on the load of dissolved and particulate components of stream nitrogen and phosphorus from a small afforested watershed of Japanese cypress (Chamaecyparis obtusa)

Effects of the sequence wildfire-harvesting-coppice sprout selection on nutrient export via streamfloe in a small E. globulus watershed in Galicia (NW Spain)

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