Evaluating Controlling Factors to Ali/(Ca + Mg) Molar Ratio in Acidic Soil Water, Southern and Southwestern China: Multivariate Approach

Guo, Jingheng; Zhang, Xiaoshan; Vogt, Rolf D.; Xiao, Jinsong; Zhao, Dawei; Xiang, Renjun; Luo, Jiahai

doi:10.1007/s10661-006-9365-8

Cited by 9 publications

(3 citation statements)

References 34 publications

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“…Other studies, which have taken this approach, are few and have examined concentrations of Al and Al fractions in soil samples rather than stream water samples (Borůvka et al 2005(Borůvka et al , 2007Guo et al 2007). Transect studies have shown that Al concentration and speciation undergo large changes in the lateral transport from recharge zone to discharge into the stream (Cory et al 2007b) with the riparian zone identified as especially important (Pellerin et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Aluminium concentrations in Swedish forest streams and co-variations with catchment characteristics

Löfgren

Cory

Zetterberg³

2009

Environ Monit Assess

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The negative effects of elevated concentrations of inorganic aluminium on aquatic organisms are well documented. Acid deposition is often cited as a main driver behind the mobilisation and speciation of aluminium in soils and surface waters. In the study, we tested the hypothesis that sulphur deposition is the main driver for elevated concentrations of inorganic aluminium in 114 base poor, boreal Swedish streams. However, the deposition of anthropogenic sulphate has decreased substantially since it peaked in the 1970s, and at the current deposition levels, we hypothesise that local site parameters play an important role in determining vulnerability to elevated concentrations of inorganic aluminium in boreal stream waters. Presented here are the results of a principal components analysis of stream water chemistry, acid deposition data and local site variables, including forest composition and stem volume. It is shown that the concentrations of both organic and inorganic aluminium are not explained by either historical or current acid deposition, but are instead explained by a combination of local site characteristics. Sites with elevated concentrations of inorganic aluminium were characterised by small catchments (<500 ha) dominated by mature stands of Norway spruce with high stem volume. Using data from the Swedish National Forest Inventory the area of productive forest land in Sweden with a higher vulnerability for elevated inorganic aluminium concentrations in forests streams is approximately 1.5 million hectares or 7% of the total productive forest area; this is higher in the south of Sweden (10%) and lower in the north (2%). A better understanding of the effects of natural processes and forest management in controlling aquatic inorganic aluminium concentrations is therefore important in future discussions about measures against surface water acidification.

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Section: Discussionmentioning

confidence: 99%

Aluminium concentrations in Swedish forest streams and co-variations with catchment characteristics

Löfgren

Cory

Zetterberg³

2009

Environ Monit Assess

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“…The statistical When co-linearity relationships exist between each independent variable, errors will occur in the results of linear regression. Therefore the partial least squares regression was utilized to reduce the errors (Guo et al, 2007).…”

Section: Methods For Data Analysismentioning

confidence: 99%

Dissolved organic sulfur in streams draining forested catchments in southern China

Wang

Zhang

Wang

et al. 2012

Journal of Environmental Sciences

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Dissolved organic sulfur (DOS) is an important fraction for sulfur mobilization in ecosystem. In this work stream waters were sampled in 25 forested sites in southern China to study the dissolved sulfur fractions. Dissolved sulfur was fractionated into dissolved organic sulfur (DOS) and inorganic sulfate (SO 2− 4 ) for 95 stream water samples. The results showed that the concentration of DOS ranged from 0 to 13.1 mg/L (average 1.3 mg/L) in all the streams. High concentrations of DOS in stream waters were found in the sites with high concentrations of sulfate. DOS constituted less than 60.1% of dissolved sulfur (average 17.9%). Statistical analysis showed that DOS concentration was correlated with SO 2− 4 in streams waters and total sulfur in surface layer soils. The results also showed that DOS concentration in stream waters had a seasonal variation, but no trends were found with it. The implication was that the long term sulfur deposition had led the increase of the concentration and fraction of DOS in stream waters in acid rain prevailing regions

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“…TSP is a coniferous-broad-leaved mixed forest ecosystem, dominated by massone pine (Pinus massoniana); Chinese fir (Cunninghamia lancelota) is also common. The forest in the area has been planted since 1962, because large parts of the forests in China were logged between 1958 and 1962 during the Great Leap Forward (Guo et al 2007). Prior to this, the forest area had several plots used for rice and vegetable production.…”

Section: Site Descriptionmentioning

confidence: 99%

N isotopes and N cycle in the TieShanPing subtropical forest ecosystem, Southwestern China

Jiang

Zhang

2008

Environ Monit Assess

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Nitrogen is essential for forest growth and forest stand development. It is commonly a limited factor for forest productivity. We examined δ 15 N values in soils and plants by studying the sources of N used by vegetation and cycles of N in a 43-year-old plantation of the TieShanPing forest ecosystem in southwestern China, dominated by massone pine (Pinus massoniana). The N concentration of plant materials ranges from 1.1% to 2.2%. The nitrogen concentration of P. massoniana was 1.3% while soils showed the concentration of 0.04-0.15%. Regarding natural abundance of 15 N, large significant variation (−6.0 to −3.8 ) in δ 15 N values was observed among shrub and tree leaves. δ 15 N values were also significantly varied from −4.7 to −3.8 among the pioneer species in the plantation. Soil 15 N values may also indicate large N losses from the soil system vial leaching, volatilization and plant uptake.

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Evaluating Controlling Factors to Ali/(Ca + Mg) Molar Ratio in Acidic Soil Water, Southern and Southwestern China: Multivariate Approach

Cited by 9 publications

References 34 publications

Aluminium concentrations in Swedish forest streams and co-variations with catchment characteristics

Aluminium concentrations in Swedish forest streams and co-variations with catchment characteristics

Dissolved organic sulfur in streams draining forested catchments in southern China

N isotopes and N cycle in the TieShanPing subtropical forest ecosystem, Southwestern China

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