Soil fluxes of mineral elements and dissolved organic matter following manipulation of leaf litter input in a Taiwan Chamaecyparis forest

Chang, Shih‐Chieh; Wang, Chiao‐Ping; Feng, Che-Ming; Rees, Rainer; Hell, Uwe; Matzner, Egbert

doi:10.1016/j.foreco.2007.01.025

Cited by 19 publications

(25 citation statements)

References 34 publications

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“…Trends in potassium concentrations in these samples corresponds to DOC concentrations in terms of increases and decreases over time (Milgate, 2007) and most likely reflects release and transport of potassium as organic matter decomposes into DOC. High transient potassium concentration is a typical pattern in forest soils in which rapid release of potassium from decomposing litter commonly exceeds the capacity of the soil to retain it (Laskowski et al, 1995;Chang et al, 2007). Potassium may also be contained in colloidal sized plant material as was reported by Eyrolle et al (1996).…”

Section: Discussionmentioning

confidence: 88%

The significance and lag-time of deep through flow: an example from a small, ephemeral catchment with contrasting soil types in the Adelaide Hills, South Australia

Bestland

Milgate

Chittleborough

et al. 2009

Hydrol. Earth Syst. Sci.

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Abstract. The importance of deep soil-regolith through flow in a small (3.4 km2) ephemeral catchment in the Adelaide Hills of South Australia was investigated by detailed hydrochemical analysis of soil water and stream flow during autumn and early winter rains. In this Mediterranean climate with strong summer moisture deficits, several significant rainfalls are required to generate soil through flow and stream flow [in ephemeral streams]. During autumn 2007, a large (127 mm) drought-breaking rain occurred in April followed by significant May rains; most of this April and May precipitation occurred prior to the initiation of stream flow in late May. These early events, especially the 127 mm April event, had low stable water isotope values compared with later rains during June and July and average winter precipitation. Thus, this large early autumn rain event with low isotopic values (δ18O, δD) provided an excellent natural tracer. During later June and July rainfall events, daily stream and soil water samples were collected and analysed. Results from major and trace elements, water isotopes (δ18O, δD), and dissolved organic carbon analysis clearly demonstrate that a large component of this early April and May rain was stored and later pushed out of deep soil and regolith zones. This pre-event water was identified in the stream as well as identified in deep soil horizons due to its different isotopic signature which contrasted sharply with the June–July event water. Based on this data, the soil-regolith hydrologic system for this catchment has been re-thought. The catchment area consists of about 60% sandy and 40% clayey soils. Regolith flow in the sandy soil system and not the clayey soil system is now thought to dominate the deep subsurface flow in this catchment. The clayey texture contrast soils had rapid response to rain events and saturation excess overland flow. The sandy soils had delayed soil through flow and infiltration excess overland flow. A pulse of macropore through flow was observed in the sandy soils three days after the rainfall event largely ended. The macropore water was a mixture of pre-event and event water, demonstrating the lag-time and mixing of the water masses in the sandy soil system. By contrast, the clayey soil horizons were not dominated by pre-event water, demonstrating the quicker response and shallow through flow of the clayey soil system. Thus, the sandy terrain has a greater vadose zone storage and greater lag time of through flow than the clayey terrain.

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Section: Discussionmentioning

confidence: 88%

The significance and lag-time of deep through flow: an example from a small, ephemeral catchment with contrasting soil types in the Adelaide Hills, South Australia

Bestland

Milgate

Chittleborough

et al. 2009

Hydrol. Earth Syst. Sci.

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“…Chang et al (2007) observed very high fluxes of DOC and DON in forest floor percolates (1,400 and 16.5 kg ha -1 15 months -1 , respectively) and even high fluxes in seepage (653 and 4.6 kg ha -1 15 months -1 , respectively) in a high precipitation mountain forest in Taiwan. Organic N fluxes in the soil exceeded those of mineral N by far.…”

Section: Introductionmentioning

confidence: 92%

“…Altitude varies from 1,400 to 1,800 m above sea level with a mean annual air temperature of 13°C and annual precipitation from 2,000 to more than 5,000 mm depending on the number and strength of storms (Chang et al 2007). Fog is very frequent and plays an important role for nutrient and water input.…”

Section: Site Descriptionmentioning

confidence: 99%

“…Fog is very frequent and plays an important role for nutrient and water input. The average relative humidity of the atmosphere is 90% (Chang et al 2007).…”

Section: Site Descriptionmentioning

confidence: 99%

“…In (sub)tropical ecosystems, DOC and DON concentrations and fluxes have received less attention, especially in forest floor percolates, although the forest floor is known to be an important source of DOM (Kalbitz et al 2000). Of these studies, only two investigated both DOC and DON fluxes and concentrations in throughfall, forest floor percolates and soil water seepage under (sub)tropical conditions (Schwendenmann and Veldkamp 2005;Chang et al 2007). Other papers on DOC and DON in (sub)tropical ecosystems only focused on throughfall or seepage data (Tobón et al 2004a;Schrumpf et al 2006;Heartsill-Scalley et al 2007;Fang et al 2009), concentrations instead of fluxes (Wilcke et al 2001;Guo et al 2005;Möller et al 2005;Goller et al 2006;Zimmermann et al 2007), or either DOC or DON (McDowell 1998Hafkenscheid 2000;Liu and Sheu 2003;Oyarzún et al 2004;Tobón et al 2004b;Fang et al 2008;Fujii et al 2009).…”

Section: Introductionmentioning

confidence: 99%

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High precipitation causes large fluxes of dissolved organic carbon and nitrogen in a subtropical montane Chamaecyparis forest in Taiwan

et al. 2010

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Fluxes of dissolved organic carbon (DOC) and nitrogen (DON) may play an important role for losses of C and N from the soils of forest ecosystems, especially under conditions of high precipitation. We studied DOC and DON fluxes and concentrations in relation to precipitation intensity in a subtropical montane Chamaecyparis obtusa var. formosana forest in Taiwan. Our objective was, to quantify DOC and DON fluxes and to understand the role of high precipitation for DOC and DON export in this ecosystem. From 2005 to 2008 we sampled bulk precipitation, throughfall, forest floor percolates and seepage (60 cm) and analyzed DOC, DON and mineral N concentrations. Average DOC fluxes in the soil were extremely high (962 and 478 kg C ha -1 year -1 in forest floor percolates and seepage, respectively) while DON fluxes were similar to other (sub)tropical ecosystems (16 and 8 kg N ha -1 year -1 , respectively). Total N fluxes in the soil were dominated by DON. Dissolved organic C and N concentrations in forest floor percolates were independent of the water flux. No dilution effect was visible. Instead, the pool size of potentially soluble DOC and DON was variable as indicated by different DOC and DON concentrations in forest floor percolates at similar precipitation amounts. Therefore, we hypothesized, that these pools are not likely to be depleted in the long term. The relationship between water fluxes in bulk precipitation and DOC and DON fluxes in forest floor percolates was positive (DOC r = 0.908, DON r = 0.842, respectively, Spearman rank correlation). We concluded, that precipitation is an important driver for DOC and DON losses from this subtropical montane forest and that these DOC losses play an important role in the soil C cycle of this ecosystem. Moreover, we found that the linear relationship between bulk precipitation and DOC and DON fluxes in forest floor percolates of temperate ecosystems does not hold when incorporating additional data on these fluxes from (subtropical) ecosystems.

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

et al. 2012

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Predicting future impacts of anthropogenic change on tropical forests requires a clear understanding of nutrient constraints on productivity. We compared experimental fertilization and litter manipulation treatments in an old-growth lowland tropical forest to distinguish between the effects of inorganic nutrient amendments and changes in nutrient cycling via litterfall. We measured the changes in soil and litter nutrient pools, litterfall, and fine root biomass in plots fertilized with nitrogen (N), phosphorus (P), or potassium (K), and in litter addition and litter removal treatments during 7 years. Soil inorganic N and litter N increased in double-litter plots but not in N-fertilized plots. Conversely, fitter P and soil pools of P and K increased in fertilized plots but not in the double-litter plots. Soil and litter pools of N and K decreased in the no-litter plots.Changes in litterfall with added nutrients or litter were only marginally significant, but fine root biomass decreased with both the litter and the K addition. Differences between the two experiments are mostly attributable to the coupled cycling of carbon and nutrients in litter. Increased nutrient inputs in litter may improve plant uptake of some nutrients compared to fertilization with similar amounts. The litter layer also appears to play a key role in nutrient retention. We discuss our findings in the context of possible impacts of anthropogenic change on tropical forests.

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Soil fluxes of mineral elements and dissolved organic matter following manipulation of leaf litter input in a Taiwan Chamaecyparis forest

Cited by 19 publications

References 34 publications

The significance and lag-time of deep through flow: an example from a small, ephemeral catchment with contrasting soil types in the Adelaide Hills, South Australia

The significance and lag-time of deep through flow: an example from a small, ephemeral catchment with contrasting soil types in the Adelaide Hills, South Australia

High precipitation causes large fluxes of dissolved organic carbon and nitrogen in a subtropical montane Chamaecyparis forest in Taiwan

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

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