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ratios and altitude in plants, soils, and litters in the karst forest ecosystem, and provide insight on the better management of the karst forest ecosystems in Southwest China. Keywords Pseudotsuga sinensis · C:N:P stoichiometry · Elevation gradient · Leaf–litter–soil · Nutrient resorption · Karst mountain region 1 Introduction
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An understanding of the enrichment mechanisms of cadmium (Cd) and arsenic (As) in the process of rock weathering and soil formation is essential to develop agriculture according to local conditions.
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Karst is the land of caves, sinkholes, and sinking streams and is formed when soluble rocks are dissolved by water. Karst occurs worldwide and in the United States, approximately 20 percent of the land surface is karst. …
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Abstract: Understanding the successional process from a disturbed forest to a mature forest is es- sential for species recovery and conservation initiatives. The resource acquisition and drought tol-
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evidence suggesting that the N cycle is open in the karst forest, southwest China, process-based investigation of gross soil N transformations is limited. In the current study, gross soil N transformations were investigated ... (Li et al., 2017; Wen et al., 2016). Journal of Geophysical Research: Biogeosciences 10.1002/2017JG003850 LI ET AL ...
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1. Introduction. Karst regions cover about 12% of the global land areas and are currently characterized by widespread ecological degradation due to human pressure and the fragile nature of the upper soils (Wang and Li, 2007, Wang et al., 2004, Yue et al., 2012).The degradation of karst ecosystems is particularly severe in developing …
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Karst Around the World. Karst occurs throughout the world (Figure 12.1.4). Approximately 20% of the land area underlain by carbonate bedrock has the potential to form karst, [3] although almost a third of that is considered unsuitable for present day karst development due to unfavorable climate, burial with overlying materials, and low relief. …
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The origin of "karst" dates to Pre-Indo-European languages when "karra" meant "stone.". In the area that is now southern Slovenia and northeast Italy, karra changed to "kras" and was used to describe the unusual …
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With implementation of both the Natural Forest Conservation Program (NFCP) and the Conversion of Farmland to Forests Program (CFFP), the fraction of forest area in HKB was increased from near zero to 18.9% during the study period, but the ratio of total water yield (surface and underground) to precipitation varied very little over the annual ...
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Three typical karst rocky desertification regions in South China Karst were selected as experiment sites. The succession of karst rocky desertification was divided into five typical degrees: nil, potential, slight, moderate, and severe. Based on the five typical degrees of rocky desertification, sample plots were set up and soil samples were …
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As a surface process, soil erosion shows obvious differences in erosion characteristics in different karst landforms (Bridge and Demicco, 2008;Zeng et al., 2018;Zhou et al., 2020; Li et al., 2021 ...
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Karst ecosystems are formed by dissolution of soluble rocks, usually with conspicuous landscape features, such as sharp peaks, steep slopes and deep valleys. The plants in karst regions develop special adaptability. Here, we reviewed the research progresses on plant adaptability in karst regions, including drought, high temperature …
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The results show that the major landmarks achieved so far include the following aspects: based on the karst desertification control area, we have elucidated the driving factors of forest ecosystem change, discovered the ecological security pattern of landscape optimization and reconstruction, revealed the internal mechanism of forest …
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Karst desertification (KD) is a phenomenon in which the surface of the karst region presents a landscape similar to desertification, which restricts the social development of the karst region. How to develop values based on karst desertification control is the focus of current research, with the continuous promotion of karst desertification control …
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Karst ecosystems are formed by dissolution of soluble rocks, usually with conspicuous landscape features, such as sharp peaks, steep slopes and deep valleys. …
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In the current study, gross soil N transformations were investigated using 15 N isotope dilution and 15 N tracer techniques in a typical karst forest with calcareous soil (Calcareous lithosols) in comparison with an adjacent nonkarst forest with red soil (Haplic acrisol).The gross rates of N mineralization, nitrification, dissimilatory nitrate ...
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Understanding the successional process from a disturbed forest to a mature forest is essential for species recovery and conservation initiatives. ... while the black circles and the solid li ne ...
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Physicochemical soil properties. Soil physiochemical properties varied among sites (Table 1) and were influenced by geological conditions (karst vs. non-karst) and forest type.Karst soils beneath ...
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Karst is a type of landscape where the dissolving of the bedrock has created sinkholes, sinking streams, caves, springs, and other characteristic features. Karst is associated with soluble rock types such …
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The Southwest China Karst, the largest continuous karst zone in the world, has suffered serious rock desertification due to the large population pressure in the area. Recent trend analyses have indicated general greening trends in this region. The region has experienced mild climate change, and yet significant land use changes, such as …
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1 Introduction. The karst areas in China are the largest in the world (Song et al., 2014), and the southwestern region of China is the most concentrated distribution areas of karst (Teng et al., 2020).Currently, the contradiction between population and land is very prominent, and the predatory activities of destroying the vegetation cover of the …
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Karst Surface Features; The Nature and Role of Epikarst; Karst Sinkholes. Media Attributions; The characteristics of karst landscapes vary depending on factors …
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Wang SJ, Li RL, Sun CX, Zhang, DF, Li FQ, Zhou DQ, Xiong KN, Zhou ZF (2004) How types of carbonate Rock Assemblages constrain the distribution of Karst Rocky Desertified land in Guizhou Province, PR China, Phenomena and Mechanisms. ... S., Liu, X., Liu, Y., Long, J. (2010). Changes of Soil Enzyme Activities in the Process of Karst Forest ...
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Here, we review how the ecology of karst forest trees is influenced by hydrological, edaphic, and topographic factors that exhibit fine spatial heterogeneity. Comparative analysis of drought tolerance traits including wood density contributes to the assessment of whether karst tree species are more drought-tolerant compared to non …
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Background Karst areas in southwestern China exhibit ecological degradation in the form of rocky desertification. Local governments launched large-scale afforestation and other ecological restoration programs to curb this trend. Soil thickness is a key limiting factor for vegetation restoration in Karst areas, but the relationship between …
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However, few reports have focused on rainstorm sediment events (RSE) based on long series, high-frequency signals in karst small watersheds. Present study assessed the process characteristics of RSE and analyzed the response of specific sediment yield (SSY) to environmental variables using random forest and correlation …
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Previous studies have reported that C:N and C:P ratios were higher in non-karst forests than they were in karst forests, due to plant inputs with high Ca content and the worsening of microbial resource scarcity in the karst forest (Chen et al. 2012, 2018; Li et al. 2017c). However, the variation in stoichiometric mechanisms among different ...
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The Relative Importance of Niche Process and Neutral Process in the Community Assembly of Subtropical Karst Forest: A Perspective on the Changes of Species Distribution Patterns at
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Abstract The purpose of this study is to develop a coupling model to improve the ability of random forest model to accurately predict karst collapse. Therefore, an inventory map consisting of 327 collapse points and 1962 non-collapse points was created. The database also contains 18 influencing factors, ranked with GeoDetector. 16 …
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