The impact of nitrogen (N) deposition on the soil N-transforming process in grasslands necessitates further investigation into how N input influences structural composition and diversity N-cycling microbial communities across different grassland types.

Abstract Background The forest-steppe ecotone, a critical transition zone sensitive to global change, faces increasing nitrogen deposition. However, the interplay between conversion processes and soil enzyme activity remains unclear. We investigated effects of addition on plant nutrient dynamics, microbial functional genes, in northwest Liaoning, China. Results Nitrogen significantly increased leaf content Potentilla tanacetifolia (peak under N40) Artemisia frigida N40), while Lespedeza...

In a greenhouse pot experiment, dandelion (Taraxacum platypecidum Diels.) and bermudagrass (Cynodon dactylon[Linn.] Pers.), inoculated with without arbuscular mycorrhizal fungus (AMF) Rhizophagus irregularis, were grown in chromium (Cr)-amended soils (0 mg/kg, 5 10 20 mg/kg Cr[VI]) to test whether (AM) symbiosis can improve Cr tolerance different plant species. The experimental results indicated that the dry weights of both species dramatically increased by AM symbiosis. Mycorrhizal...

Soil microbial communities are critical in regulating grassland biogeochemical cycles and ecosystem functions, but the mechanisms of how environmental factors affect changes structural composition diversity soil different types is not fully understood northwest Liaoning, China. We investigated characteristics drivers bacterial fungal 4 with 11 sites across this region using high-throughput Illumina sequencing. Actinobacteria Ascomycota were dominant phyla communities, respectively, their...

Abstract Background Soil microorganisms in the thawing permafrost play key roles maintenance of ecosystem function and regulation biogeochemical cycles. However, our knowledge patterns drivers microbial communities is limited northeastern China. Therefore, we investigated community structure soil bacteria active, transition layers based on 90 samples collected from 10 sites across continuous region using high-throughput Illumina sequencing. Results Proteobacteria (31.59%), Acidobacteria...

Black carbon (BC) from incomplete combustion of biomass and fossil fuel is widespread in sediments soils because its high stability nature considered an important component the global sink. However, knowledge BC stocks influencing factors forest ecosystems currently limited. We investigated soil contents burned boreal forests Great Khingan Mountains, northeast China. collected samples 14 sites with different fire severities, slope positions aspects. The were analyzed by chemo-thermal...

Frequent hazy weather has been one of the most obvious air problems accompanying China's rapid urbanization. As main components haze pollution, fine particulate matter (PM2.5), which severely affects environmental quality and people's health, attracted wide attention. This study investigated PM2.5 distribution, changing trends impact urban factors based on remote-sensing concentration data from 2000 to 2015, combining land-use socioeconomic data, using least-squares method structural...

As nitrous oxide (N 2 O) is one of the most important greenhouse gases, N O emission pathways and regulation techniques in soils with different vegetation types have become a research focus. Currently, diverse array exists on emissions from types, e.g., forest, grassland, agriculture. Few studies investigated microbial processes lawn soils. Fertilization levels are often similar to or much higher than those agricultural ecosystems, thus fertilized an source atmospheric O. In study, we...

Atmospheric nitrogen(N) deposition increased soil active N, and excessive N content led to the increase of ratio nitrogen phosphorus (N: P), which changed plant growth from limitation phosphorus(P) limitation. Potentilla is not only an important native greening material, but also a common diversity component in various grasslands China. Its population fluctuation process will affect species productivity grassland ecosystem. Potting experiment was conducted for 2 years with tanacetifolia ,...

Continuous nitrogen deposition increases the content of terrestrial ecosystems and alters soil cycling process. Invasive plants have strong environmental adaptability, which can not only affect composition diversity microbial community but also significantly transformation process nitrogen, leading to successful invasion. Currently, research on invasive plant mainly focused changes in nutrients microorganisms. As an annual grass weed with ecological impact Cenchrus spinifex at different...

Land use regression (LUR) modeling is a promising method for assessing the spatial variation of air pollutant concentrations.We developed an LUR model pollutants (SO 2 , NO and PM 10 ) in central cities Liaoning Province using monitoring data collected during 2013.We evaluated whether addition annual satellite aerosol optical depth (AOD) observations fi ve canyon indicators (building height, building coverage ratio, fl oor area shape coeffi cient, high-rise ratio) improved...

Introduction Continuous nitrogen deposition increases the content of terrestrial ecosystem and affects geochemical cycle soil nitrogen. Forest-grassland ecotone is interface area forest grassland sensitive to global climate change. However, structure composition diversity microbial communities their relationship with environmental factors at increasing have not been sufficiently studied in forest-grassland ecotone. Methods In this study, experiments were carried out four addition treatments...

<title>Abstract</title> Plant-microbial interactions (PMI) play a crucial role in plant growth, fitness and productivity, primarily through the mutualism antagonism between plants soil microorganisms. The colonization of arbuscular mycorrhizal (AM) fungi pathogen are often used to speculate on effects microorganisms i.e. plant-microbial (PMI). However, empirical studies demonstrate relationship AM or PMI remains limited, especially under different biotic abiotic conditions. Here, we...

<title>Abstract</title> Soil bacterial diversity often shows different trends due to changes in dominant plant species. However, the potential key drivers of processes that reveal diversity<italic> per se</italic> have not been clearly elucidated. We established a field experiment with 9 native grassland species and assessed relationship between soil ecological taxa classified by network construction. A co-occurrence 1065 points 10023 edges, among grasses, was classify microbial taxa. The...

Invasive plants often alter biological soil conditions to increase their own competitiveness. Through indoor simulated nitrogen deposition culture experiments, we investigated the differences in growth indicators and nutrient content levels between invasive plant

Heterotrophic nitrification is a process of organic nitrogen degradation completed by the participation heterotrophic nitrifying microorganisms, which can accelerate transformation process. However, current research mainly focuses on bacteria and their ammonium capacities. And there little accumulation fungi, main force nitrification, capacities to transform nitrogen. In this study, novel fungus (XTY1) bacterium (GS2) were screened isolated from upland soil, strains identified registered...