Effects of forest age on soil erosion and nutrient loss in Dianchi watershed, China

Sun, Wenxian; Niu, Xiaoyin; Wang, Yongping; Yin, Xianwei; Teng, Hao–Wei; Gao, Peiling; Liu, Aiju

doi:10.1007/s10661-023-10920-8

Cited by 11 publications

(2 citation statements)

References 52 publications

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“…The loss of these nutrients can result in nutrient deficiencies and hinder the forest's ability to thrive and regenerate. Over time, if nutrient losses are not replenished, soil fertility decreases, further impacting forest productivity [12,13]. Harvesting activities reduce surface cover and compact the soil, leading to increased runoff and erosion.…”

Section: Introductionmentioning

confidence: 99%

Soil Properties and Forest Decline in the North-Western Part of Romania

Onet,

Vidican,

Ghergheles

et al. 2024

Forests

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The paper presents the study of the soil quality and health expressed by the chemical and biological properties in a research field placed at Varciorog, Bihor County, Romania. The soil samples were collected from 3 soil variants in March 2023. In each soil variant, some soil chemical parameters and the abundance of bacteria were determined. The frequency and intensity of colonization, along with arbuscules and vesicles, were scored to determine the mycorrhizal potential of each soil. The community-level physiological profile was used to determine the functional microbiome and its ability to decompose a specific set of substrates. In the control variant (CTRL), which is a functional forest cultivated with beech in a proportion of 90%, the soil properties were compared with those determined from Site 1 (a declined mixed forest) and from Site 2 (chestnut forest in a stage of complete drying). The data were statistically processed with a one-way ANOVA test, followed by the Duncan post-hoc test, which revealed significant variation in the potential of microbial functional communities across the analyzed sites. Also, the soil parameters that significantly varied in the 3 soil variants were bacterial number, pH, humus, exchangeable aluminum, coarse sand, dust, and fine sand. The Pearson correlation was computed to study the links between bacterial numbers and chemical parameters. The results showed strong correlations between most of the studied soil properties. The Ecoplates approach to soil functional microbiome highlighted various differences between the microbial communities of the three tested sites. Mycorrhizal colonization shows different potentials for symbiosis formation. The peak of mycorrhizal colonization was in declined forest, with 43.36% colonization frequency and 24.56% intensity. Arbuscules reached 11.36% in declined forest, while in control and decayed sites, the indicator was under 4%. Vesicles are more associated with control and decayed forests, with values of presence over 1.30%. As an indicator of microbial general activity, the sum of recorded activities was higher in declined and decayed forests. At these sites, the activity of the functional microbiome was amplified. The decline process activates a higher diversity of functional groups and is associated with a larger area of substrate decomposition capacity, which indicates a more extensive range of microbial functions related to breaking down organic matter.

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Section: Introductionmentioning

confidence: 99%

Soil Properties and Forest Decline in the North-Western Part of Romania

Onet,

Vidican,

Ghergheles

et al. 2024

Forests

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“…Forested catchments play a vital role in high-quality water supplies and provide slope stability and erosion control worldwide [4][5][6]. Forest soil erosion caused by rainwater results in the loss of soil and its organic carbon and nutrients, further damaging the forest ecosystem [7,8]. Moreover, because forested areas exist in regions with high precipitation [9,10], this may further exacerbate the damage to ecosystems, especially concerning climate change [11].…”

Section: Introductionmentioning

confidence: 99%

Slope Gradient Effects on Sediment Yield of Different Land Cover and Soil Types

Nang,

Onodera,

Wang

et al. 2024

Water

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Water majorly contributes to soil erosion. Considering Japan’s humid and rainy climate, severe soil erosion challenges persist even though forests are the country’s dominant land type. Although numerous studies have emphasized the impact of factors such as land use, soil type, and slope steepness on sediment yield, the synergetic effects of slope gradient with varying land cover and soil types are underexplored. Herein, we used the Soil and Water Assessment Tool (SWAT) on a steep catchment to identify high sediment yield areas—as well as factors influencing high sediment yield—and evaluate the effect of slope gradient on the sediment yield of different land cover and soil types. The findings reveal an average annual sediment yield of 0.55 tons ha−1 yr−1 in the Takahashi catchment, with yields tripling in some western subbasins under heavy rainfall. Furthermore, the slope gradient effect is most considerable in bare land, agriculture, and rice land cover, with the average sediment yield of bare land resulting in 2.2 tons ha−1 yr−1 at slope > 45%. Meanwhile, deciduous forests on steep slopes exhibit extreme sediment yield, peaking at 7.2 tons ha−1 yr−1 at slope > 45%. The regosol soil type has one of the highest sediment yield variations in all soil types due to slope gradient.

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