Acidification-induced chemical changes in coniferous forest soils in southern Sweden 1988–1999

Jönsson, Ulrika; Rosengren, Ulrika; Thelin, Gunnar; Nihlgård, Bengt

doi:10.1016/s0269-7491(02)00335-4

Cited by 72 publications

(47 citation statements)

References 34 publications

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“…3,9,23,24 Furthermore, excess N deposition can lead to a state of N saturation, where N input exceeds the biological demand of ecosystem and its ability to bind nitrogen, and thus further induce soil acidification and decrease soil buffering capacity. 25−27 However, our understanding of how N deposition affects soil buffering capacity is based largely on work in temperate regions of Northern Hemisphere, 3,5,7,28,29 where ecosystems are typically N-limited. 9,25,30,31 Data necessary to rigorously evaluate the patterns of soil buffering capacity are lacking for the biota of tropical regions, 7,10,32 where N cycling is often open with high soil N availability, rapid rates of N cycling, and lack of N limitation to net primary productivity, which is substantially different from temperate ecosystems.…”

Section: ■ Introductionmentioning

confidence: 99%

Divergent Responses of Soil Buffering Capacity to Long-Term N Deposition in Three Typical Tropical Forests with Different Land-Use History

Mao

et al. 2015

Environ. Sci. Technol.

113

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Elevated anthropogenic nitrogen (N) deposition has become an important driver of soil acidification at both regional and global scales. It remains unclear, however, how long-term N deposition affects soil buffering capacity in tropical forest ecosystems and in ecosystems of contrasting land-use history. Here, we expand on a long-term N deposition experiment in three tropical forests that vary in land-use history (primary, secondary, and planted forests) in Southern China, with N addition as NH 4 NO 3 of 0, 50, 100, and 150 kg N ha −1 yr −1 , respectively. Results showed that all three forests were acid-sensitive ecosystems with poor soil buffering capacity, while the primary forest had higher base saturation and cation exchange capacity than others. However, long-term N addition significantly accelerated soil acidification and decreased soil buffering capacity in the primary forest, but not in the degraded secondary and planted forests. We suggest that ecosystem N status, influenced by different land-use history, is primarily responsible for these divergent responses. N-rich primary forests may be more sensitive to external N inputs than others with low N status, and should be given more attention under global changes in the future, because lack of nutrient cations is irreversible.

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Section: ■ Introductionmentioning

confidence: 99%

Divergent Responses of Soil Buffering Capacity to Long-Term N Deposition in Three Typical Tropical Forests with Different Land-Use History

Mao

et al. 2015

Environ. Sci. Technol.

113

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“…An examination of the soil of the European forests provides basic information on the chemical condition of the soil and the nutrient supply to the trees, as well as the influence of pollutant inputs on the soil condition. There are clear correlations between forest soil chemistry and the deposition of acidity and heavy metals (De Schrijver et al 1998, Nilsson & Tyler 1995, Eriksson et al 1992, Fernandez et al 2003, Hernandez 2003. Therefore a soil condition assessment provides information on soil related stress factors for forest condition, evidenced by nutrient imbalances or impaired growth.…”

Section: Introductionmentioning

confidence: 99%

Availability and evaluation of European forest soil monitoring data in the study on the effects of air pollution on forests

Cools¹,

Vos²

2011

iForest

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In the study of air pollution effects on forest ecosystems, solid soil data such as cation exchange capacity, base saturation and other exchangeable cation fractions, soil texture, soil moisture, soil weathering rates, C/N ratio and other variables form an important information base for many air pollution impact models. This paper shows some of the possibilities and the limitations of the soil data that European countries collected on the systematic Level I and on the intensive and permanent Level II monitoring plots within the ICP Forests programme. The soil data date from a first inventory in the 1990s and from a second inventory more than 10 years later. Both surveys were conducted following a common manual on sampling and analysis of soil. An example of the changes in pH(CaCl2) and base saturation in the forest floor and mineral soil on more than 2000 plots till a depth of 80 cm between the two surveys is presented. In this period the pH(CaCl2) significantly increased in the very acid forest soils [with pH(CaCl2) below 4.0] but further decreased in forest soils with pH(CaCl2) above 4.0. Following the trend in pH, the base saturation increased in soils with a very low buffering capacity (soils with a base saturation below 20% in the first inventory) and decreased in forest soils with reference base saturation values above 20%. There is both a decrease of soil pH and base saturation in the forest floor of the Arenosols and Podzols. In the Podzols this decreasing trend could not be established in the mineral soil, though this decreasing trend persisted in a number of mineral soil layers of the Arenosols. The only consistent increasing trend of pH and base saturation when stratifying according to the WRB reference soil groups was seen in the forest floor of the Luvisols and Cambisols

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“…A considerable amount of work on the impacts of S, acidity and N the major pollutants in wet deposition since the 1980s has shown how the major ions SO 4 2 , H + , NH 4 + and NO 3 can acidify soils and influence tree growth; this was summarised comprehensively in Stjernquist and Sellden (2002) and Jönsson et al, (2003). Decreases in soil pH, coupled with the mobile anion effect, whereby soluble, mobile cations move down the soil profile and out of the rooting zone accompanying strong mobile anions e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of five years of frequent N additions, with or without acidity, on the growth and below-ground dynamics of a young Sitka spruce stand growing on an acid peat: implications for sustainability

Sheppard

Crossley

Harvey

et al. 2004

Hydrol. Earth Syst. Sci.

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A field manipulation study was established to demonstrate effects of simulated wet N and S deposition on a young (planted 1986) stand of Sitka spruce growing on a predominantly organic soil in an area of low (810 kg N ha 1 yr 1 ) background N deposition in the Scottish borders. From 1996, treatments (six) were applied to the canopies of ten-tree plots in each of four blocks. N was provided as NH 4 NO 3 , either with H 2 SO 4 (pH 2.5) at 48 or 96 kg N ha -1 yr -1 inputs or without, at 48 kg N ha 1 yr 1 along with wet (rain water) and dry controls (scaffolding) and a S treatment (Na 2 SO 4 ). Positive responses (+ >20% over 5 years) with respect to stem area increment were measured in response to N inputs, irrespective of whether acid was included. The positive response to N was not dose related and was achieved against falling base cation concentrations in the foliage, particularly with respect to K. The results suggest young trees are able to buffer the low nutrient levels and produce new growth when there is sufficient N. Inputs of 96 kg N ha 1 yr 1 , in addition to ambient N inputs, on this site exceeded tree demand resulting in elevated foliar N, N 2 O losses and measurable soil water N. These excessive N inputs did not reduce stem area growth.

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Acidification-induced chemical changes in coniferous forest soils in southern Sweden 1988–1999

Cited by 72 publications

References 34 publications

Divergent Responses of Soil Buffering Capacity to Long-Term N Deposition in Three Typical Tropical Forests with Different Land-Use History

Divergent Responses of Soil Buffering Capacity to Long-Term N Deposition in Three Typical Tropical Forests with Different Land-Use History

Availability and evaluation of European forest soil monitoring data in the study on the effects of air pollution on forests

Effects of five years of frequent N additions, with or without acidity, on the growth and below-ground dynamics of a young Sitka spruce stand growing on an acid peat: implications for sustainability

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