scholarly journals Grazing exclusion regulates bacterial community in highly degraded semiarid soils from the Brazilian Caatinga biome

2021 ◽  
Author(s):  
Arthur Prudêncio de Araujo Pereira ◽  
Lara Andrade Lucena Lima ◽  
Walderly Melgaço Bezerra ◽  
Mirella Leite Pereira ◽  
Leonardo Ribeiro Oliveira Normando ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Grazing Exclusion ◽  
Caatinga Biome ◽  
Semiarid Soils

scholarly journals Grazing exclusion regulates bacterial community in highly degraded semiarid soils from Brazilian Caatinga biome

2020 ◽  
Author(s):  
Arthur Pereira ◽  
Lara Lima ◽  
Walderly Bezerra ◽  
Mirella Pereira ◽  
Leonardo Normando ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Grazing Exclusion ◽  
Caatinga Biome ◽  
Semiarid Soils

scholarly journals Soil bacterial community and functions directly respond to grazing exclusion in a Leymus chinensis steppe of Inner Mongolia, China

2020 ◽  
Author(s):  
Han-Wen Deng ◽  
Xin-Fu Bai ◽  
Ping Zhu ◽  
Yu-Meng Lu ◽  
Lei Ji ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Inner Mongolia ◽  
Soil Bacterial Community ◽  
Leymus Chinensis ◽  
Absolute Abundance ◽  
Ecological Functions ◽  
Grazing Exclusion ◽  
The Absolute ◽  
Soil Bacterial

Abstract Background Grazing exclusion is a common grassland management strategy for restoring degraded grasslands. Its effectiveness on optimizing plant species community, increasing vegetation diversity and biomass, improving soil fertility, has been widely documented in literatures. However, little is known on the responses of the absolute abundance and the ecological functions of soil bacterial community to long-term grazing exclusion. Result In this study, the absolute abundance, diversity, and ecological functions of soil bacterial community were determined by the high-throughput absolute quantitative sequencing technology on a long-term grazing exclusion (40 years, GE) area and three free grazing areas (FGs) within a Leymus chinensis steppe of Inner Mongolia, China, and analyzed the driving forces leading to the variations in soil bacterial community and functions. Our results showed that there was significantly higher soil bacterial abundance in the GE than the FGs along with corresponding variations in vegetation and soil properties. With the decrease of vegetation aboveground biomass, the absolute abundance of soil bacterial community also decreased. Among the phyla of the soil bacterial communities, the relative abundances of Chloroflexi and Firmicutes phyla were especially lower, and that of Verrucomicrobia phylum was higher in the GE than the FGs; the absolute abundances of Euryarchaeota and Microgenomates phyla were especially higher in the GE than the FGs. Conclusions This study suggested that long-term grazing exclusion significantly increased the absolute abundance, changed soil bacterial composition, and especially enhanced bacterial motility and chemotaxis. In particular, soil organic matter was the important agent to influence and connect vegetation and soil. This work will enrich our understanding of the responses of absolute abundance, diversity, and function of the soil bacterial community to long-term grazing exclusion, and help the evaluation of grassland degradation degree and restoration strategy effectiveness.

Influence of crude oil contamination on the bacterial community of semiarid soils of Patagonia (Argentina)

2000 ◽  
Vol 20 (2) ◽  
pp. 129-146 ◽  
Author(s):  
O. H. Pucci ◽  
M. A. Bak ◽  
S. R. Peressutti ◽  
I. Klein ◽  
C. Härtig ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Crude Oil ◽  
Oil Contamination ◽  
Crude Oil Contamination ◽  
Semiarid Soils

scholarly journals Structure and diversity of bacterial community in semiarid soils cultivated with prickly-pear cactus (Opuntia ficus-indica (L.) Mill.)

2021 ◽  
Vol 93 (3) ◽  
Author(s):  
MARIA DO CARMO C.P. DE LYRA ◽  
RODRIGO G. TAKETANI ◽  
ANA DOLORES S. DE FREITAS ◽  
CAROLINA E.R.S. E SILVA ◽  
ADÁLIA C.E.S. MERGULHÃO ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Prickly Pear ◽  
Opuntia Ficus Indica ◽  
Prickly Pear Cactus ◽  
Semiarid Soils ◽  
Pear Cactus

scholarly journals Soil bacterial community responses to short-term grazing exclusion in a degraded alpine shrubland – grassland ecotone

2021 ◽  
Vol 130 ◽  
pp. 108043
Author(s):  
Jinlan Wang ◽  
Wen Li ◽  
Wenxia Cao ◽  
Theophilus Atio Abalori ◽  
Yuzhen Liu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Soil Bacterial Community ◽  
Community Responses ◽  
Short Term ◽  
Grazing Exclusion ◽  
Soil Bacterial

Assessment of viral assemblages in different types of wetland water in northeast China using RAPD-PCR

2020 ◽  
Vol 85 ◽  
pp. 183-196
Author(s):  
Y Sun ◽  
J Liu ◽  
Q Yao ◽  
J Jin ◽  
X Liu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Water Samples ◽  
Northeast China ◽  
Bacterial Community Composition ◽  
Freshwater Wetlands ◽  
Viral Community ◽  
Rapd Pcr ◽  
Wetland Water ◽  
Different Types ◽  
Viral Communities

Viruses are the most abundant and ubiquitous biological entities in various ecosystems, yet few investigations of viral communities in wetlands have been performed. To address this data gap, water samples from 6 wetlands were randomly collected across northeast China; viruses in the water were concentrated by sequential tangential flow filtration, and viral communities were assessed through randomly amplified polymorphic DNA-PCR (RAPD-PCR) with 4 decamer oligonucleotide primers. Principal coordinate analysis and hierarchical clustering analysis of the DNA fingerprints showed that viral community compositions differed among the water samples: communities in the 2 coastal wetlands were more similar to each other than to those in the 4 freshwater wetlands. The Shannon-Weaver index (H) and evenness index (E) of the RAPD-PCR fingerprint also differed among the 6 wetlands. Mantel test revealed that the changes in viral communities in wetland water were most closely related to the water NH4+-N and inorganic C content, followed by total K, P, C and NO3--N. DNA sequence analysis of the excised bands revealed that viruses accounted for ~40% of all sequences. Among the hit viral homologs, the majority belonged to the Microviridae. Moreover, variance partitioning analysis showed that the viral community contributed 24.58% while environmental factors explained 30.56% of the bacterial community variation, indicating that the bacterial community composition was strongly affected by both viral community and water variables. This work provides an initial outline of the viral communities from different types of wetlands in northeast China and improves our understanding of the viral diversity in these ecosystems.

A comparison of bacterial community structure, activity and microcystins associated with formation and breakdown of a cyanobacterial scum

2017 ◽  
Vol 80 (3) ◽  
pp. 243-256 ◽  
Author(s):  
K Steiner ◽  
SA Wood ◽  
J Puddick ◽  
I Hawes ◽  
DR Dietrich ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Structure Activity

Temporally invariable bacterial community structure in the Arabian Sea oxygen minimum zone

2014 ◽  
Vol 73 (1) ◽  
pp. 51-67 ◽  
Author(s):  
A Jain ◽  
M Bandekar ◽  
J Gomes ◽  
D Shenoy ◽  
RM Meena ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Arabian Sea ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum

1281 - Study on antibiotic resistome and bacterial community in Indonesian river

2018 ◽  
Author(s):  
Windi Muziasari ◽  
Vanny Narita
Keyword(s):  
Bacterial Community
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