scholarly journals Effects of enrichmemt planting with native tree species on bacterial community structure and potential impact on Eucalyptus plantations in southern China

2022 ◽  
Author(s):  
Yuxing Xu ◽  
Chao Li ◽  
Wankuan Zhu ◽  
Zhichao Wang ◽  
Lichao Wu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Third Generation ◽  
The Third ◽  
Α Diversity ◽  
Native Tree ◽  
Native Tree Species ◽  
Mixed Systems

AbstractMulti-generational planting of Eucalyptus species degrades soil quality but the introduction of legumes can improve soil fertility and microbial diversity. However, the effects of introducing non-legume native tree species on soil nutrients and bacterial community structure remain poorly understood. This study investigated the impacts of the conversion of third generation monoculture Eucalyptus plantations to mixed systems including Eucalyptus urograndis with Cinnamomum camphora (EC) and E. urograndis with Castanopsis hystrix (EH), on soil chemical and biochemical properties and bacterial community structure, diversity and functions. First generation E. urophylla plantations were the control. Results show that planting the third generation Eucalyptus led to a significant decrease in pH, organic matter, nutrient content, enzyme activities (invertin, acid phosphataes, and urease), and bacterial α-diversity compare to the controls. However, the mixed planting showed significant improvement in soil chemical and biochemical attributes and bacterial α-diversity, although the E. urograndis and C. hystrix planting had no improvement. Chloroflexi (oligotrophic bacteria) were significantly enriched in third generation Eucalyptus and Eucalyptus + C. hystrix, while proteobacteria increased significantly in the E. urograndis with C. camphora plantings. The relative abundance of multiple metabolic pathways increased significantly in the third generation Eucalyptus plantations whereas membrane transport-related genes were enriched in soils of the mixed systems. The changes in bacterial community structures in the two mixed systems were driven by diversity, organic matter and acid phosphatase, while bacterial functions were affected by invertase, $${\mathrm{NO}}_{3}^{-}$$ NO 3 - -N, diversity and urease. These results suggest that the transformation of successive monoculture Eucalyptus plantations into mixed plantations reduces the depletion of soil nutrients and enhances the ecological function of soil microorganisms.

scholarly journals Mitigation of Eutrophication in a Shallow Lake: The Influences of Submerged Macrophytes on Phosphorus and Bacterial Community Structure in Sediments

2021 ◽  
Vol 13 (17) ◽  
pp. 9833
Author(s):  
Juanjuan Wang ◽  
Siwen Zhang ◽  
Tianyang Que ◽  
Anna H. Kaksonen ◽  
Xiaoqing Qian ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Shallow Lake ◽  
Bacterial Community Structure ◽  
Α Diversity ◽  
P Immobilization ◽  
One Year ◽  
Vigorous Plant ◽  
And Control

Remediating water eutrophication is critical for maintaining healthy and sustainable development of lakes. The aim of this study was to explore the seasonal variation in phosphorus (P) speciation and bacterial community structure in sediments of Qin Lake (Taizhou, Jiangsu Province, China) associated with the growth of submerged macrophyte Vallisneria natans. The differences in sediment bacterial diversity and community structure between V. natans growing and control areas were analyzed over a period of one year. The results showed that V. natans growth reduced the total P and organic matter contents of the sediments and increased the bioavailable iron (Fe) and Fe-bound P contents. The α-diversity of sediment bacteria was significantly higher in the presence of V. natans than in the controls during the vigorous plant growth stage. In the presence of V. natans, there was a higher relative abundance of Proteobacteria and lower relative abundances of Chloroflexi and Acidobacteria. The Fe(II) content in the sediment had a larger influence on the spatial distribution of bacterial communities than sediment Fe-bound P, organic matter, and Fe(II) contents. V. natans growth could reshape sediment bacterial community structure in the shallow lake, which, in turn, enhanced P immobilization in the sediments and thereby improved the water quality.

Relationships between Soil Organic Matter, Nutrients, Bacterial Community Structure, And the Performance of Microbial Fuel Cells

2012 ◽  
Vol 46 (3) ◽  
pp. 1914-1922 ◽  
Author(s):  
Sara J. Dunaj ◽  
Joseph J. Vallino ◽  
Mark E. Hines ◽  
Marcus Gay ◽  
Christine Kobyljanec ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fuel Cells ◽  
Community Structure ◽  
Soil Organic Matter ◽  
Bacterial Community ◽  
Microbial Fuel Cells ◽  
Bacterial Community Structure

Nutrient availability and organic matter quality shape bacterial community structure in a lake biofilm

2020 ◽  
Vol 85 ◽  
pp. 1-18
Author(s):  
RC Seballos ◽  
KH Wyatt ◽  
RJ Bernot ◽  
SP Brown ◽  
S Chandra ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Heterotrophic Bacteria ◽  
Interspecific Interactions ◽  
Molecular Techniques ◽  
Nitrogen And Phosphorus ◽  
Microbial Composition ◽  
Organic Matter Quality

Heterotrophic bacteria play a key role in ecosystem processes, but little is known about the factors that shape bacterial community structure in aquatic biofilms, especially in lakes. We used molecular techniques (16S rRNA) to evaluate resource controls on biofilm bacterial community structure in an oligotrophic subalpine lake. We manipulated nutrients (nitrogen and phosphorus; NP) and glucose (G) on inorganic (rock) and organic (wood) substrates under light and dark conditions (i.e. with and without autotrophy, respectively) in a full factorial design using nutrient diffusing substrates in situ for 20 d. Distinct patterns of separation in community structure between treatments with nutrients (NP, NP+G) and without nutrients (control, G-only) indicated that community structure was more strongly influenced by nutrients than organic matter irrespective of substrate type or light availability. Further separation in community structure between treatments with nutrients only (NP) and nutrients with glucose (NP+G) on both organic and inorganic substrates indicated that once nutrient limitation was alleviated, organic matter quality played an important role in shaping community structure. Differences in the relative abundance of 6 phyla, 3 classes, and 19 genera among treatments revealed (1) contrasting taxa-specific resource requirements, (2) the influence of interspecific interactions on composition, and (3) the potential for individual taxa to participate in the decomposition of recalcitrant organic matter. Our findings provide insight into the role that nutrients and organic matter quality play in shaping bacterial community structure, which is a critical step in bridging the knowledge gap between microbial composition and ecosystem function within aquatic environments.

scholarly journals Bacterial community structure in the Bohai Strait provides insights into organic matter niche partitioning

2018 ◽  
Vol 169 ◽  
pp. 46-54 ◽  
Author(s):  
Yibo Wang ◽  
Bin Wang ◽  
Lisa M. Dann ◽  
James G. Mitchell ◽  
Xiaoke Hu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Niche Partitioning ◽  
Bohai Strait

scholarly journals Bacterial community structure and dissolved organic matter in repeatedly flooded subsurface karst water pools

2014 ◽  
Vol 89 (1) ◽  
pp. 111-126 ◽  
Author(s):  
Tanja Shabarova ◽  
Jörg Villiger ◽  
Oleg Morenkov ◽  
Jutta Niggemann ◽  
Thorsten Dittmar ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Dissolved Organic Matter ◽  
Bacterial Community Structure ◽  
Karst Water

scholarly journals Effects of Sphaeropsis Blight on Rhizosphere Soil Bacterial Community Structure and Soil Physicochemical Properties of Pinus sylvestris var. mongolica in Zhanggutai, China

Forests ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 954
Author(s):  
Saiyaremu Halifu ◽  
Xun Deng ◽  
Xiaoshuang Song ◽  
Yuning An ◽  
Ruiqing Song
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Pinus Sylvestris ◽  
Physicochemical Properties ◽  
Bacterial Community Structure ◽  
Rhizosphere Soil ◽  
Liaoning Province ◽  
Soil Physicochemical Properties ◽  
Α Diversity ◽  
Significant Difference

Pinus sylvestris var. mongolica is an important tree species for ecological construction and environmental restoration owing to its rapid growth rate and excellent stress resistance. Pinus sylvestris var. mongolica sphaeropsis blight is a widespread disease caused by Sphaeropsis sapinea. This study was focused on non-infected (CK) and infected (SS) Pinus sylvestris var. mongolica plants in Zhanggutai area, Liaoning Province, China. Illumina high-throughput sequencing based on the templates of sequencing-by-synthesis working with reversible terminators is a widely used approach. In the present study, systematic differences in relationships among rhizosphere soil physicochemical properties, bacterial community structure, diverse bacterial genera, and alpha diversity indices between the two categories were evaluated. The current findings are as follows: (1) Shannon’s index of SS soil was significantly higher than CK, and it was significantly lower in May than July and September (p < 0.05). (2) Non-metric multidimensional scaling (NMDS) showed a difference in bacterial community structure during May (spring), July (summer), and September. (3) At the phylum level, no significant difference was found in the bacterial genera between CK and SS soil for three seasons; however, at the genus level, there were about 19 different bacterial genera. The correlation studies between 19 different bacterial genera and environmental factors and α-diversity indicated that bacterial genera of non-infected and infected Pinus sylvestris var. mongolica were distributed differently. The bacterial genera with CK were positively correlated with soil physicochemical properties, while a negative correlation was found for SS. In conclusion, the differences in nutrient and microbial community structure in the rhizosphere soil of Pinus sylvestris var. mongolica are the main causes of shoot blight disease.

scholarly journals Effects of Residue Retention and Removal Following Thinning on Soil Bacterial Community Composition and Diversity in a Larix olgensis Plantation, Northeast China

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 559
Author(s):  
Xue Dong ◽  
Xin Du ◽  
Zhi-Hu Sun ◽  
Xiang-Wei Chen
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Soil Bacteria ◽  
Soil Bacterial Community ◽  
Soil Bacterial Communities ◽  
Α Diversity ◽  
Soil Bacterial Community Structure ◽  
Soil Bacterial ◽  
Residue Retention

Thinning is an important management practice for reducing plant competition and improving wood production in forests. The residues from thinning can contain large amounts of carbon (C) and nitrogen (N), and the management methods applied directly after thinning can affect the input of nutrients to soil, change the availability of substrates to soil bacterial communities, and thus affect soil bacterial community structure. Our objective was to determine the effects of different thinning residue treatments on soil bacterial community structure and diversity. Illumina high-throughput sequencing technology was used to sequence the bacterial 16SrRNA V3–V4 variable region of the soil (0–10 cm) of a Larix olgensis plantation to compare the composition and diversity of soil bacterial communities following removal of thinning residues (tree stems plus tree crowns) (RM) and retention of thinning residues (crowns retained with stem removal) (RT) treatments. Total soil carbon (TC) and nitrogen (TN) content in the residue retention treatment were significantly greater than in residue removal treatments (p < 0.05). The relative abundance of the dominant soil bacteria phyla were, in descending order: Proteobacteria, Verrucomicrobia, Acidobacteria, Chloroflexi, Actinobacteria, Nitrospirae, Planctomycetes, Gemmatimonadetes, and Bacteroidetes, with a total relative abundance of more than 80%. Acidobacteria were enriched in the RM treatment, while Proteobateria, Actinobacteria and Bacteroidetes were greater in the RT treatment. Rhizobiales and Rhodospirillales (belonging to the α-Proteobacteria) were enriched in the RM treatment. Soil bacteria α diversity was not significantly different among different treatments. Spearman correlation analysis showed that the α diversity index was significantly negatively correlated with TC and TN. Lefse analysis revealed that 42 significant soil bacteria from phylum to genus were found in the two different thinning residue treatments. Redundancy analysis showed that soil TC and TN were the major drivers of variation in soil bacterial community structure. Overall, thinning residue retention increased the availability of resources to the soil bacterial community, thus changing bacterial community structure. This research provides a theoretical basis for the regulation of plantation forest soil fertility and quality.

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