Microbial community characterization in Red Sea-derived samples using a field-deployable DNA extraction system and...

Area of Science:

• Marine microbiology
• Environmental genomics
• Molecular ecology

Background:

• Assessing microbial communities in marine ecosystems like coral reefs and mangroves is vital.
• Traditional methods involve sample transport, potentially biasing results.
• Field-deployable nucleic acid extraction systems aim to capture more accurate microbial diversity.

Purpose of the Study:

• To evaluate the xTitan field-deployable nucleic acid extraction system for Red Sea microbial communities.
• To compare microbial diversity data from in-field versus in-laboratory DNA extractions.
• To assess the impact of sample transport and storage on microbial community structure.

Main Methods:

• Utilized the xTitan automated nucleic acid extraction system in the field and laboratory.
• Compared DNA extraction using xTitan with a standard commercial kit (Qiagen).
• Analyzed microbial communities from coral, mangrove sediment, and seawater samples using 16S rRNA gene sequencing.

Main Results:

• In-field xTitan extraction showed a trend toward higher alpha diversity compared to laboratory methods.
• Significant differences in beta diversity and functional gene profiles were observed between in-field and in-lab xTitan extractions, especially in mangrove samples.
• On-site extraction improved detection of certain microbial taxa, including Endozoicomonas acroporae in corals and revealed differential abundance in mangrove-associated species.

Conclusions:

• The xTitan system is a viable tool for field-based microbial community characterization.
• On-site DNA extraction minimizes biases associated with sample transport and storage.
• Field-based extraction is crucial for detecting microbial taxa sensitive to cold storage, enhancing marine microbiome research.