scholarly journals Bacterial Community Changes Associated with Land Use Type in the Forest Montane Region of Northeast China

Forests ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 40 ◽  
Author(s):  
Shi-Jun Wu ◽  
Jiao-Jiao Deng ◽  
You Yin ◽  
Sheng-Jin Qin ◽  
Wen-Xu Zhu ◽  
...  
Keyword(s):  
Land Use ◽  
Forest Soils ◽  
Bacterial Communities ◽  
Northeast China ◽  
Total Carbon ◽  
Pinus Koraiensis ◽  
Rrna Gene ◽  
Dominant Group ◽  
Land Use Types ◽  
Coniferous Plantation

Soil microorganisms play a vital role in the biogeochemical cycle, whereas land use change is one of the primary factors that affects the biodiversity and functionality of terrestrial ecosystems. The composition and diversity of bacterial communities (by high-throughput sequencing of the bacterial 16S rRNA gene) were evaluated in the soils of the Montane Region of Northeast China, across different land use types, e.g., natural secondary forest (Quercus mongolica, QM), shrubland (SL), coniferous plantation (Larix gmelinii, LG, and Pinus koraiensis, PK), and agricultural land (Zea mays, ZM). Significant differences in the chemical characteristics and bacterial communities in soils under different land uses were observed in this study. Soil resident TC (total carbon) and TN (total nitrogen) were much higher in secondary natural forest soils, than in coniferous plantation and agricultural soils. Compared with forest and shrubland soils, soil bacterial OTUs, the Chao1 index, and the ACE index were the lowest in the ZM. There were high proportions of Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Gemmatimonadetes, Verrucomicrobia, Bacteroidetes, Planctomycetes, Saccharibacteria, and Nitrospirae in agricultural and forest soils, which accounted for over 90% of the reads in each sample. We found that the dominant group in the forest and shrubland soils was Proteobacteria, while the most dominant group in the ZM was Actinobacteria. The results of both heatmap and principal component analyses displayed groups according to land use types, which indicated that the bacterial communities in the areas under study were significantly influenced by long term differently managed land use. Furthermore, redundancy and Pearson correlation analyses revealed that the bacterial communities were primarily regulated by soil characteristics. This suggested that altered land use patterns initiated changes in the chemical properties of the soils, which affected the composition of microbial communities in this area. This provides a scientific basis for the evolutionary mechanism of soil quality, as well as the rational development and utilization of land resources.

Phthalate esters in surface water of Songhua River watershed associated with land use types, Northeast China

2017 ◽  
Vol 25 (8) ◽  
pp. 7688-7698 ◽  
Author(s):  
Zhidan Wen ◽  
Xiaoli Huang ◽  
Dawen Gao ◽  
Ge Liu ◽  
Chong Fang ◽  
...  
Keyword(s):  
Land Use ◽  
Surface Water ◽  
Northeast China ◽  
Phthalate Esters ◽  
Songhua River ◽  
River Watershed ◽  
Land Use Types

scholarly journals Increase soil aggregate stability can limit colloidal phosphorus loss potentials from agricultural systems

2019 ◽  
Author(s):  
Fayong Li ◽  
Xinqiang Liang ◽  
Hua Li ◽  
Yingbin Jin ◽  
Junwei Jin ◽  
...  
Keyword(s):  
Land Use ◽  
Aggregate Stability ◽  
Aggregate Size ◽  
Soil Aggregate ◽  
Paddy Soils ◽  
Total Carbon ◽  
Agricultural Systems ◽  
Soil Aggregate Stability ◽  
Soil P ◽  
Land Use Types

Abstract Background Colloid-facilitated phosphorus (P) transport is a recognized important pathway for soil P loss in agricultural systems, but limited information is available on the soil aggregate-associated colloidal P. To elucidate the effects of aggregate size on the loss potential of colloidal P (P coll ) in agricultural systems, soils (0-20 cm depth) from six land use types were sampled in Zhejiang province in the Yangtz river delta region, China. The aggregate size fractions (2–8 mm, 0.26–2 mm, 0.053–0.26 mm and <0.053 mm) separated by wet-sieving method were analyzed.Results Results showed that the 0.26–2 mm small macroaggregates had the highest total P (TP) content. For acidic soils, the highest P coll content was also found in the 0.26–2 mm aggregate size, while the lowest was found in the <0.053 mm (silt+clay)-sized particles, the opposite of that found in alkaline soils. Paddy soils contained less P coll than other land use types. The P coll in total dissolved P (TDP) was dominated by <0.053 mm (silt+clay)-sized particles. Aggregate size did strongly influence the loss potential of P coll in paddy soils, where P coll contributed up to 83% TDP in the silt+clay sized particles. The P coll content was positively correlated with TP, Al, Fe and mean weight diameter (MWD). Aggregate associated total carbon (TC), total nitrogen (TN), C/P, and C/N had significant, but negative effects on the contribution of P coll to potential soil P losses. The P coll content of the aggregates was controlled by aggregate associated TP and Al content as well as soil pH value, with P coll loss potential from aggregates being controlled by its organic matter content.Conclusion Therefore, we conclude that management practices that increase soil aggregate stability or its organic carbon content will limit P coll loss from agricultural systems.

scholarly journals Impact of Maize–Mushroom Intercropping on the Soil Bacterial Community Composition in Northeast China

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1526
Author(s):  
Xiaoqin Yang ◽  
Yang Wang ◽  
Luying Sun ◽  
Xiaoning Qi ◽  
Fengbin Song ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Northeast China ◽  
Management Practice ◽  
Bacterial Community Composition ◽  
Soil Microbial Communities ◽  
Chemical Properties ◽  
Crop Productivity ◽  
Rrna Gene ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Conservative agricultural practices have been adopted to improve soil quality and maintain crop productivity. An efficient intercropping of maize with mushroom has been developed in Northeast China. The objective of this study was to evaluate and compare the effects of planting patterns on the diversity and structure of the soil bacterial communities at a 0–20 cm depth in the black soil zone of Northeast China. The experiment consisted of monoculture of maize and mushroom, and intercropping in a split-plot arrangement. The characteristics of soil microbial communities were performed by 16S rRNA gene amplicom sequencing. The results showed that intercropping increased soil bacterial richness and diversity compared with maize monoculture. The relative abundances of Acidobacteria, Chloroflexi, Saccharibacteria and Planctomycetes were significantly higher, whereas Proteobacteria and Firmicutes were lower in intercropping than maize monoculture. Redundancy analysis suggested that pH, NO3−-N and NH4+-N contents had a notable effect on the structure of the bacterial communities. Moreover, intercropping significantly increased the relative abundance of carbohydrate metabolism pathway functional groups. Overall, these findings demonstrated that intercropping of maize with mushroom strongly impacts the physical and chemical properties of soil as well as the diversity and structure of the soil bacterial communities, suggesting this is a sustainable agricultural management practice in Northeast China.

scholarly journals Land-Use Changes Associated with Oil Palm Plantations Impact PLFA Microbial Phenotypic Community Structure throughout the Depth of Tropical Peats

Wetlands ◽  
2020 ◽  
Vol 40 (6) ◽  
pp. 2351-2366
Author(s):  
Selvakumar Dhandapani ◽  
Karl Ritz ◽  
Stephanie Evers ◽  
Hannah Cooper ◽  
Amanda Tonks ◽  
...  
Keyword(s):  
Land Use ◽  
Community Structure ◽  
Relative Abundance ◽  
Oil Palm ◽  
Carbon Sink ◽  
Phospholipid Fatty Acid ◽  
Ecosystem Functions ◽  
Dominant Group ◽  
Land Use Types ◽  
Tropical Peatlands

AbstractTropical peatlands are complex and globally-important ecosystems that are increasingly threatened by anthropogenic disturbances, primarily via agricultural development. Microbes in peatlands play important roles in governing overall ecosystem functions and sustenance, with specific population dynamics governing carbon sink or source dynamics. We determined phenotypic microbial community structures under forest, drained, burned and oil palm plantation peatlands, using phospholipid fatty acid (PLFA) profiling. Communities were distinct under each land-use type, varied consistently with depth down to two metres, but with a distinct characteristic shift at circa one metre depth. There was bacterial dominance across all land-use types and depths. The burnt peatland showed the greatest contrast relative to forest, possibly due to the difference in water table level. Gram-positive bacteria was the most dominant group in surface layers under all land-use types except burnt, and their relative abundance decreased with depth, replaced by Gram-negative groups in deeper layers. Fungal relative abundance remained low across both land-use types and depth ranges. Our results shed light on a hitherto virtually unknown tropical peat microbial phenotypic community structure and indicate that anthropogenic disturbance in tropical peatlands severely alter microbial communities.

scholarly journals Land-use changes influence soil bacterial communities in a meadow grassland in Northeast China

Solid Earth ◽  
2017 ◽  
Vol 8 (5) ◽  
pp. 1119-1129 ◽  
Author(s):  
Chengyou Cao ◽  
Ying Zhang ◽  
Wei Qian ◽  
Caiping Liang ◽  
Congmin Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Land Use Changes ◽  
Chemical Properties ◽  
Soil Bacterial Communities ◽  
Land Use Types ◽  
Soil Bacterial ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract. The conversion of natural grassland into agricultural fields is an intensive anthropogenic perturbation commonly occurring in semiarid regions, and this perturbation strongly affects soil microbiota. In this study, the influences of land-use conversion on the soil properties and bacterial communities in the Horqin Grasslands in Northeast China were assessed. This study aimed to investigate (1) how the abundances of soil bacteria changed across land-use types, (2) how the structure of the soil bacterial community was altered in each land-use type, and (3) how these variations were correlated with soil physical and chemical properties. Variations in the diversities and compositions of bacterial communities and the relative abundances of dominant taxa were detected in four distinct land-use systems, namely, natural meadow grassland, paddy field, upland field, and poplar plantation, through the high-throughput Illumina MiSeq sequencing technique. The results indicated that land-use changes primarily affected the soil physical and chemical properties and bacterial community structure. Soil properties, namely, organic matter, pH, total N, total P, available N and P, and microbial biomass C, N, and P, influenced the bacterial community structure. The dominant phyla and genera were almost the same among the land-use types, but their relative abundances were significantly different. The effects of land-use changes on the structure of soil bacterial communities were more quantitative than qualitative.

scholarly journals Different types of agricultural land use drive distinct soil bacterial communities

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shin Ae Lee ◽  
Jeong Myeong Kim ◽  
Yiseul Kim ◽  
Jae-Ho Joa ◽  
Seong-Soo Kang ◽  
...  
Keyword(s):  
Land Use ◽  
Bacterial Communities ◽  
Agricultural Land ◽  
Agricultural Management ◽  
Agricultural Land Use ◽  
Community Structures ◽  
Soil Bacterial Communities ◽  
Microbial Network ◽  
Land Use Types ◽  
Different Types

Abstract Biogeographic patterns in soil bacterial communities and their responses to environmental variables are well established, yet little is known about how different types of agricultural land use affect bacterial communities at large spatial scales. We report the variation in bacterial community structures in greenhouse, orchard, paddy, and upland soils collected from 853 sites across the Republic of Korea using 16S rRNA gene pyrosequencing analysis. Bacterial diversities and community structures were significantly differentiated by agricultural land-use types. Paddy soils, which are intentionally flooded for several months during rice cultivation, had the highest bacterial richness and diversity, with low community variation. Soil chemical properties were dependent on agricultural management practices and correlated with variation in bacterial communities in different types of agricultural land use, while the effects of spatial components were little. Firmicutes, Chloroflexi, and Acidobacteria were enriched in greenhouse, paddy, and orchard soils, respectively. Members of these bacterial phyla are indicator taxa that are relatively abundant in specific agricultural land-use types. A relatively large number of taxa were associated with the microbial network of paddy soils with multiple modules, while the microbial network of orchard and upland soils had fewer taxa with close mutual interactions. These results suggest that anthropogenic agricultural management can create soil disturbances that determine bacterial community structures, specific bacterial taxa, and their relationships with soil chemical parameters. These quantitative changes can be used as potential biological indicators for monitoring the impact of agricultural management on the soil environment.

Impact of Land-Use Change on Carbon Stocks in Meadow Steppe of Northeast China

2011 ◽  
Vol 108 ◽  
pp. 262-268 ◽  
Author(s):  
Pei Yong Lian ◽  
De Hui Zeng ◽  
Jin Ye Liu ◽  
Fan Ding ◽  
Zhi Wei Wu
Keyword(s):  
Land Use ◽  
Aboveground Biomass ◽  
Northeast China ◽  
Carbon Stock ◽  
Primary Objective ◽  
Meadow Steppe ◽  
Organic C ◽  
C Storage ◽  
Land Use Types ◽  
The Impact

An improved understanding of changes in carbon storage of terrestrial ecosystems is very important for assessing the impacts of increasing atmospheric CO2 concentration and climate change on the terrestrial biosphere. Accurately predicting terrestrial carbon (C) storage requires understanding the carbon stock, because it helps us understand how ecosystems would respond to natural and anthropogenic disturbances under different management strategies. We investigated organic C storage in aboveground biomass, litter, roots, and soil organic matter (SOM) in five land-use types (i.e. artificial pasture, AP; natural meadow, NM; corn plantation, CP; temperate savanna, TS; and bush wood, BW) in meadow steppe of Northeast China. The primary objective of this study was to ascertain the impact of different land-use types on the carbon stock. The total C storage (including C stored in aboveground biomass, litter, roots, and 0–100-cm soil layers) did not significantly differ between one and another type among the five pairs (P>0.05), with the exception of AP2-BW pair. The total C storage changes in value varying from 5958.09 g C m-2 for plot NM2 to 11922.87 g C m-2 for plot CP1. The C stored in the aboveground biomass was less than 1177.96 g C m-2, accounting for negligible amounts (<1% of the total) of total C storage in the ecosystem except corn plantation. The amount of C stored in SOM accounted for less than 85% of the total C storage in TS, AP2, and NM3, and the C stored in litter was very low (<1.5%), compared to other pools in the ecosystem. The amount of C stored in the roots varied from 0 g C m-2 for plot BW, CP1, and CP2 to 2032.32 g C m-2 for plot NM3, and it accounted for less than 20% of C storage in the grassland.

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