Distribution of zinc and cadmium in the temperate forest taxa of Central Japan

Memon, Abdul Razaque; Itô, Seigo; Yatazawa, Michihiko

doi:10.1080/00380768.1980.10431210

Cited by 5 publications

(1 citation statement)

References 19 publications

(23 reference statements)

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“…This may suggest that Cd was either sourced from outside or from secondary sources resulting from other factors (e.g., land use). A vertical decreasing trend of Cd concentration in soil has been demonstrated in temperate forests in Japan [54], in which Cd concentrations decreased from 0.021 in the A horizon to 0.003 mg kg −1 in the C horizon. That study also concluded that the Cd content in soils can be changed by air and water pollution or heavy-traffic roads.…”

Section: Implication Of CD Measurement In the Forest Ecosystem In Yunfu Areamentioning

confidence: 96%

Comparison of Models for Spatial Distribution and Prediction of Cadmium in Subtropical Forest Soils, Guangdong, China

Ding

Zhao

Xing³

et al. 2021

Land

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Cadmium (Cd) is a toxic metal and found in various soils, including forest soils. The great spatial heterogeneity in soil Cd makes it difficult to determine its distribution. Both traditional soil surveys and spatial modeling have been used to study the natural distribution of Cd. However, traditional methods are highly labor-intensive and expensive, while modeling is often encumbered by the need to select the proper predictors. In this study, based on intensive soil sampling (385 soil pits plus 64 verification soil pits) in subtropical forests in Yunfu, Guangdong, China, we examined the impacting factors and the possibility of combining existing soil information with digital elevation model (DEM)-derived variables to predict the Cd concentration at different soil depths along the landscape. A well-developed artificial neural network model (ANN), multi-variate analysis, and principal component analysis were used and compared using the same dataset. The results show that soil Cd concentration varied with soil depth and was affected by the top 0–20 cm soil properties, such as soil sand or clay content, and some DEM-related variables (e.g., slope and vertical slope position, varying with depth). The vertical variability in Cd content was found to be correlated with metal contents (e.g., Cu, Zn, Pb, Ni) and Cd contents in the layer immediately above. The selection of candidate predictors differed among different prediction models. The ANN models showed acceptable accuracy (around 30% of predictions have a relative error of less than 10%) and could be used to assess the large-scale Cd impact on environmental quality in the context of intensifying industrialization and climate change, particularly for ecosystem management in this region or other regions with similar conditions.

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Section: Implication Of CD Measurement In the Forest Ecosystem In Yunfu Areamentioning

confidence: 96%

Comparison of Models for Spatial Distribution and Prediction of Cadmium in Subtropical Forest Soils, Guangdong, China

Ding

Zhao

Xing³

et al. 2021

Land

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Metal Hyperaccumulators: Mechanisms of Hyperaccumulation and Metal Tolerance

Memon

2016

Phytoremediation

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Taxonomic character of plant species in absorbing and accumulating alkali and alkaline earth metals grown in temperate forest of Japan

et al. 1983

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Absorption and accumulation of alkali (Li, Na, K, Rb, Cs) and alkaline earth (Mg, Ca, Sr, Ba) metals were investigated as taxonomic characteristics (in 62 plant species). Leaf and soil samples were collected from 9 sites in temperate forest in Japan and the above mentioned elements were analyzed. Considerable differences were found among species in their ability to accumulate alkali and alkaline earth metals. Very high concentrations of Li (45 ppm, D.W.), K (37 x 103 ppm), Rb (159 ppm) and Cs (8.2 ppm) were detected in Lastreajaponica which were about 412, 12, 27 and 6 times higher than those of the species with the lowest concentrations. Na content was high in Acer micranthum (358 ppm) which was 16 times higher than species with the lowest concentration. Other species containing high levels of alkali metals were Hydrangea macrophylla, Struthiopteris niponica, Clethra barbinervis. Mean discrimination ratio (D.R.) for all investigated plant species for Li, Na, Rb, and Cs to K were 1.7, 0.44, 0.9 and 1.8 respectively. High concentrations of alkaline earth metals Ca (36 x 103ppm), Sr (345ppm), and Ba (241 ppm) were found in the leaves of Hydrangea paniculata which were about 31, 84, and 72 times higher than those for the species with the lowest concentration. Mg was very high in Struthiopteris niponica (83 x 102 ppm). Other species with high concentrations of alkaline earth metals belonged to the genus Viburnum. Mean D.Rs. for Mg, Sr, and Ba os Ca were 1.0, 0.7 and 0.08. Principal component analysis of interrelationships between the mineral content in leaf tissues indicated that these elements could be classified into 2 groups with respect to their accumulation behavior in plants. The alkali metals K, Li, Rb, and Cs behaved similarly in their accumulation in leaves but Na behaved independently. Alkaline earth metals Ca, Mg, Sr, and Ba were also found to behave similarly in their accumulation. Factors scores of 1st and 2nd components revealed three groups of plant species: alkaliphilic, alkaline earthphilic, and neutral (non-accumulators).

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Distribution of zinc and cadmium in the temperate forest taxa of Central Japan

Cited by 5 publications

References 19 publications

Comparison of Models for Spatial Distribution and Prediction of Cadmium in Subtropical Forest Soils, Guangdong, China

Comparison of Models for Spatial Distribution and Prediction of Cadmium in Subtropical Forest Soils, Guangdong, China

Metal Hyperaccumulators: Mechanisms of Hyperaccumulation and Metal Tolerance

Taxonomic character of plant species in absorbing and accumulating alkali and alkaline earth metals grown in temperate forest of Japan

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