Investigation of Functional Microbial Diversity and Related Abiotic Factors in Coastal and Desert Ecosystem of Gujarat

2012 ◽  
pp. 351-362
Author(s):  
D. Biswas ◽  
A. Mandal ◽  
H. Akbari ◽  
N. Munshi
Keyword(s):  
Microbial Diversity ◽  
Abiotic Factors ◽  
Desert Ecosystem ◽  
Functional Microbial Diversity

scholarly journals Microbial Diversity of Terrestrial Geothermal Springs in Armenia and Nagorno-Karabakh: A Review

2021 ◽  
Vol 9 (7) ◽  
pp. 1473
Author(s):  
Ani Saghatelyan ◽  
Armine Margaryan ◽  
Hovik Panosyan ◽  
Nils-Kåre Birkeland
Keyword(s):  
16S Rrna ◽  
Microbial Diversity ◽  
High Altitude ◽  
Hot Springs ◽  
Hot Spring ◽  
Abiotic Factors ◽  
Rrna Gene ◽  
Geothermal Springs ◽  
Bacterial Phyla ◽  
Terrestrial Hot Springs

The microbial diversity of high-altitude geothermal springs has been recently assessed to explore their biotechnological potential. However, little is known regarding the microbiota of similar ecosystems located on the Armenian Highland. This review summarizes the known information on the microbiota of nine high-altitude mineralized geothermal springs (temperature range 25.8–70 °C and pH range 6.0–7.5) in Armenia and Nagorno-Karabakh. All these geothermal springs are at altitudes ranging from 960–2090 m above sea level and are located on the Alpide (Alpine–Himalayan) orogenic belt, a seismically active region. A mixed-cation mixed-anion composition, with total mineralization of 0.5 mg/L, has been identified for these thermal springs. The taxonomic diversity of hot spring microbiomes has been examined using culture-independent approaches, including denaturing gradient gel electrophoresis (DGGE), 16S rRNA gene library construction, 454 pyrosequencing, and Illumina HiSeq. The bacterial phyla Proteobacteria, Bacteroidetes, Cyanobacteria, and Firmicutes are the predominant life forms in the studied springs. Archaea mainly include the phyla Euryarchaeota, Crenarchaeota, and Thaumarchaeota, and comprise less than 1% of the prokaryotic community. Comparison of microbial diversity in springs from Karvachar with that described for other terrestrial hot springs revealed that Proteobacteria, Bacteroidetes, Actinobacteria, and Deinococcus–Thermus are the common bacterial groups in terrestrial hot springs. Contemporaneously, specific bacterial and archaeal taxa were observed in different springs. Evaluation of the carbon, sulfur, and nitrogen metabolism in these hot spring communities has revealed diversity in terms of metabolic activity. Temperature seems to be an important factor in shaping the microbial communities of these springs. Overall, the diversity and richness of the microbiota are negatively affected by increasing temperature. Other abiotic factors, including pH, mineralization, and geological history, also impact the structure and function of the microbial community. More than 130 bacterial and archaeal strains (Bacillus, Geobacillus, Parageobacillus, Anoxybacillus, Paenibacillus, Brevibacillus Aeribacillus, Ureibacillus, Thermoactinomyces, Sporosarcina, Thermus, Rhodobacter, Thiospirillum, Thiocapsa, Rhodopseudomonas, Methylocaldum, Desulfomicrobium, Desulfovibrio, Treponema, Arcobacter, Nitropspira, and Methanoculleus) have been reported, some of which may be representative of novel species (sharing 91–97% sequence identity with their closest matches in GenBank) and producers of thermozymes and biomolecules with potential biotechnological applications. Whole-genome shotgun sequencing of T. scotoductus K1, as well as of the potentially new Treponema sp. J25 and Anoxybacillus sp. K1, were performed. Most of the phyla identified by 16S rRNA were also identified using metagenomic approaches. Detailed characterization of thermophilic isolates indicate the potential of the studied springs as a source of biotechnologically valuable microbes and biomolecules.

Greenhouse gas emission in relation to labile soil C, N pools and functional microbial diversity as influenced by 39 years long-term fertilizer management in tropical rice

2013 ◽  
Vol 129 ◽  
pp. 93-105 ◽  
Author(s):  
P. Bhattacharyya ◽  
A.K. Nayak ◽  
S. Mohanty ◽  
R. Tripathi ◽  
Mohammad Shahid ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Greenhouse Gas ◽  
Greenhouse Gas Emission ◽  
Fertilizer Management ◽  
Gas Emission ◽  
Soil C ◽  
Functional Microbial Diversity

scholarly journals Longitudinal sampling of external mucosae in farmed European seabass reveals the impact of water temperature on bacterial dynamics

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Daniela Rosado ◽  
Raquel Xavier ◽  
Jo Cable ◽  
Ricardo Severino ◽  
Pedro Tarroso ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Microbial Diversity ◽  
Water Temperature ◽  
Abiotic Factors ◽  
Seasonal Effect ◽  
Microbial Composition ◽  
Surrounding Water ◽  
European Seabass ◽  
And Function ◽  
The Impact

AbstractFish microbiota are intrinsically linked to health and fitness, but they are highly variable and influenced by both biotic and abiotic factors. Water temperature particularly limits bacterial adhesion and growth, impacting microbial diversity and bacterial infections on the skin and gills. Aquaculture is heavily affected by infectious diseases, especially in warmer months, and industry practices often promote stress and microbial dysbiosis, leading to an increased abundance of potentially pathogenic bacteria. In this regard, fish mucosa health is extremely important because it provides a primary barrier against pathogens. We used 16 rRNA V4 metataxonomics to characterize the skin and gill microbiota of the European seabass, Dicentrarchus labrax, and the surrounding water over 12 months, assessing the impact of water temperature on microbial diversity and function. We show that the microbiota of external mucosae are highly dynamic with consistent longitudinal trends in taxon diversity. Several potentially pathogenic genera (Aliivibrio, Photobacterium, Pseudomonas, and Vibrio) were highly abundant, showing complex interactions with other bacterial genera, some of which with recognized probiotic activity, and were also significantly impacted by changes in temperature. The surrounding water temperature influenced fish microbial composition, structure and function over time (days and months). Additionally, dysbiosis was more frequent in warmer months and during transitions between cold/warm months. We also detected a strong seasonal effect in the fish microbiota, which is likely to result from the compound action of several unmeasured environmental factors (e.g., pH, nutrient availability) beyond temperature. Our results highlight the importance of performing longitudinal studies to assess the impact of environmental factors on fish microbiotas.

Functional microbial diversity dynamics in common effluent treatment plants of South Gujarat and hydrocarbon degradation

2015 ◽  
Vol 61 (6) ◽  
pp. 389-397 ◽  
Author(s):  
Purvi Zaveri ◽  
Nasreen Munshi ◽  
Alok Vaidya ◽  
Sanjay Jha ◽  
G. Naresh Kumar
Keyword(s):  
Microbial Diversity ◽  
Restriction Analysis ◽  
Principal Component ◽  
Hydrocarbon Degradation ◽  
Effluent Treatment ◽  
Organic Load ◽  
Aeration Tank ◽  
Conventional Procedure ◽  
Rdna Sequencing ◽  
Functional Microbial Diversity

Common effluent treatment plants (CETPs) of South Gujarat region, India, process wastewater generated by more than 2500 industries because of the nonfeasibility of processing at the individual industrial unit. This study assessed functional microbial diversity in wastewater samples of CETPs over a geological belt using Ecoplate®, isolation of the most abundant bacteria, and screening for hydrocarbon degradation. The high evenness (EPielou) values (0.9) in almost all samples indicated a highly even community structure. Principal component analysis of carbon source utilization showed a cluster of all inlet samples except E1 and another cluster of all outlet samples; aeration tank community samples were dispersed. In spite of the high richness found in microbial communities, 60 morphologically similar organisms were observed and isolated; 46 out of them were subjected to amplified ribosomal DNA restriction analysis with MboI, HaeIII, and TaqI enzyme, followed by UPGMA clustering. In screening the most abundant bacteria from each cluster, one of the cultures showed a high potential for hydrocarbon degradation and was identified as Pseudomonas citronellolis by 16S rDNA sequencing. Because of its highly adapted inherent nature, this bacterium may help augment the conventional procedure in wastewater treatment and efficiently decrease the organic load.

Functional Microbial Diversity

2019 ◽  
pp. 427-449 ◽  
Author(s):  
Hideto Takami
Keyword(s):  
Microbial Diversity ◽  
Functional Microbial Diversity

Functional microbial diversity responses to biodynamic management in Burgundian vineyard soils

2020 ◽  
Vol 36 (3) ◽  
pp. 172-186
Author(s):  
Jürgen Fritz ◽  
Ramia Jannoura ◽  
Finja Lauer ◽  
Jona Schenk ◽  
Pierre Masson ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Functional Microbial Diversity ◽  
Vineyard Soils

Functional microbial diversity of the railway track bed

2008 ◽  
Vol 397 (1-3) ◽  
pp. 205-214 ◽  
Author(s):  
Harald Cederlund ◽  
Tomas Thierfelder ◽  
John Stenström
Keyword(s):  
Microbial Diversity ◽  
Railway Track ◽  
Functional Microbial Diversity

scholarly journals Comparative Study of the Rhizosphere and Root Endosphere Microbiomes of Cholistan Desert Plants

2021 ◽  
Vol 12 ◽  
Author(s):  
Salma Mukhtar ◽  
Samina Mehnaz ◽  
Kauser Abdulla Malik
Keyword(s):  
Microbial Diversity ◽  
Microbial Communities ◽  
Arid Regions ◽  
Soil Moisture Content ◽  
Abiotic Factors ◽  
Arid Environments ◽  
Desert Plants ◽  
Limited Information ◽  
Cholistan Desert ◽  
Capparis Decidua

Microbial communities associated with the rhizosphere and roots of desert halophytes play an important role in plants’ growth and development. Very limited information has been available on the microbial diversity of arid environments of Pakistan. Hence in the current study, the microbial diversity of rhizosphere and root endosphere of desert halophytes, Zygophyllum simplex, Haloxylon salicoricum, Aerva javanica, and Capparis decidua was evaluated. The rhizosphere and root endosphere samples of desert halophytes collected from the three geographic sites of Cholistan desert, Punjab, Pakistan were analyzed by using 16S rRNA based Illumina sequencing. The results showed that Proteobacteria were more abundant in the rhizospheric soils while Actinobacteria were more dominant in the root endosphere of halophytes. Bacteroidetes, Firmicutes, and Deinococcus-Thermus were identified from all rhizospheric soils and roots across the three sites, with variable percentage. Bacillus, Kocuria, Pseudomonas, Halomonas, and Flavobacterium were commonly identified from the rhizosphere and root endosphere of halophytes across all the three sites. At the genus level, microbial diversity from Haloxylon showed the greatest variations between the rhizosphere and root endosphere from the site 2. This study revealed that microbial diversity analysis can be used to study how changes in abiotic factors such as soil moisture content and salinity affect the microbial communities associated with the rhizospheric soils and root endosphere of halophytes across the three sites. This study will also help in the discovery of potential inoculants for crops growing in arid and semi-arid regions of Pakistan.

Sign in / Sign up

Export Citation Format

Share Document