Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
By using modified Levins niche width index and Pianka niche overlap index, this paper analyzed the ecological competition between constructive and dominant species in a typical steppe. The stem- and leaf extracts from the constructive species (Artemisia sacrorum) were utilized to study their allelopathic potential on the seed germination and plant growth of the dominant species (Stipa bungeana, Thymus mongolicus, S. grandis, and Leymus secalinus), and the ecological position of A. sacrorum in the steppe succession. In the steppe, S. bungeana had the widest niche width (0.99), followed by T. mongolicus (0.94), A. sacrorum (0.82), S. grandis (0.76), and L. secalinus (0.73). The niche overlap value between A. sacrorum and S. bungeana, S. bungeana and T. mongolicus, T. mongolicus and S. grandis, and A. sacrorum and T. mongolicus was 0.90, 0.95, 0.94, and 0.86, respectively. The allelopathic effects of A. sacrorum extracts varied with their concentration. For the seed germination, root growth, and shoot growth of the dominant species, A. sacrorum extracts showed a trend of promoting at low concentrations and inhibiting at high concentrations. The extracts of A. sacrorum had a stronger promotion effect on the root growth of S. bungeana than on that of T. mongolicus, but a stronger inhibition effect on the shoot growth of T. mongolicus than on that of S. bungeana. Methanol extracts had stronger allelopathic effects than aqueous extracts. The high niche overlap between A. sacrorum and S. bungeana, and T. mongolicus and S. grandis indicated that the steppe community would continue succession to S. bungeana, while A. sacrorum population was only an important transitional stage during the succession. The allelopathic effect of A. sacrorum played a driving role in the succession process.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
High- and low-quality litter are equally important to the improvement of grassland soil multifunctionality and quality.
J Environ Manage
September 2025
College of Agronomy, Northwest Agriculture & Forestry University, Yangling, 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling, 712100, Shaanxi, PR China. Electronic address:
Grassland ecosystems, as one of the most significant ecological units on Earth, play a crucial role in the global carbon cycle and biodiversity conservation due to their extensive coverage and huge soil carbon storage. Litter, as an important component of soil ecosystems, plays a crucial role in soil nutrient cycling, organic matter dynamics, and the structure and function of grassland ecosystems. However, the mechanisms by which different quality litter and their decomposition differences affect the soil multifunctionality (SMF) and quality index (SQI) of grassland remain unclear.
View Article and Find Full Text PDFVariations of soil infiltration in response to vegetation restoration and its influencing factors on the Loess Plateau.
J Environ Manage
December 2024
The National Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing, 210029, China.
Article Synopsis
- Soil infiltration is vital for plant water needs, especially in semi-arid areas like the Loess Plateau, but its responses to vegetation restoration types are not well understood.
- This study investigates how different revegetation methods impact soil infiltration through field experiments with nine plant species across five restoration types, finding that artificial forests and natural grasslands improved soil properties significantly.
- Results revealed that increased root characteristics from vegetation restoration boosted soil stability and porosity, leading to higher infiltration rates, with soil particle size and porosity being key predictors of these enhanced properties.
Highly oxygenated guaiane-type sesquiterpene lactones from Artemisia sacrorum and their antihepatoma activity.
Phytochemistry
January 2024
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:
The ethanol and EtOAc extracts of Artemisia sacrorum exhibited inhibitory effect against HepG2, Huh7, and SK-Hep-1 cell lines with inhibitory ratios of 65.5%, 28.1%, 84.
View Article and Find Full Text PDFSecondary succession of shrub-herb communities in the hilly area of Taihang Mountain.
Front Plant Sci
September 2023
Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Soil Ecology, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, China.
Introduction: To document the successional processes of shrub-herb communities after large-scale human disturbance, and understand how changing environmental conditions affect species replacement in semi-humid hilly areas.
Methods: Utilizing the established permanent plots in the hilly area of Taihang Mountain, we evaluated temporal patterns of vegetation and soil following grass-to-shrub succession.
Results And Discussion: Along secondary succession, var.
Ecological stoichiometry of plant leaves, litter and soils in a secondary forest on China's Loess Plateau.
PeerJ
October 2020
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China.
Ecological stoichiometry can reveal nutrient cycles in soil and plant ecosystems and their interactions. However, the ecological stoichiometry characteristics of leaf-litter-soil system of dominant grasses, shrubs and trees are still unclear as are their intrinsic relationship during vegetation restoration. This study selected three dominant plant types of grasses ( () and ()), shrubs ( () and ()) and trees ( () and ()) in secondary forest areas of the Chinese Loess Plateau to investigate ecological stoichiometric characteristics and their intrinsic relationships in leaf-litter-soil systems.
View Article and Find Full Text PDF