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Academic Journal of Environment & Earth Science, 2024, 6(3); doi: 10.25236/AJEE.2024.060303.

Comparison of Community Composition and Function of Particle-associated Microorganisms and Free-living Microorganisms in the Mariana Trench

Author(s)

Qianyi Hui1,2

Corresponding Author:
Qianyi Hui
Affiliation(s)

1College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai, 201306, China

2Shanghai Engineering Research Center of Hadal Science and Technology, Shanghai, 201306, China

Abstract

Deep-sea environments have unique habitat characteristics, including extremely high hydrostatic pressure, low temperatures, and minimal light. In addition, the deep sea also has a unique energy flow and material circulation system. In this special biological environment, the species, genetic composition and ecological function diversity of deep-sea microorganisms have been improved, and the abyss is the deepest part of the deep-sea environment, which has the most special biological environment in the deep-sea and is one of the least understood marine environments by human beings so far. The abyss contains abundant microbial biomass and exhibits active organic carbon turnover characteristics, which is a "hot spot" area for organic carbon degradation in the deep sea. In the marine environment, microorganisms exist in different ways, with Particle-associated microorganisms (PA) and free-living microorganisms (FL) representing two distinct lifestyles. However, little is known about the species composition and metabolic potential of abyssal microorganisms. In this paper, we used metagenomic technology and bioinformatics analysis to study the community composition and functional characteristics of these two microorganisms in the "Challenger Deep" (water depth of 10,500 meters) in the Mariana Trench, and to find the metabolic differences caused by their different lifestyles based on their functional characteristics. The results show that the nitrogen fixation ability, extreme environment adaptability and antioxidant capacity of free microorganisms are stronger than those of epiphytic microorganisms in the abyssal environment, which provides some help for the future research on abyssal microorganisms.

Keywords

Mariana Trench, Particle-associated Microorganisms, Free-living Microorganisms, Species Composition and Ecological Function

Cite This Paper

Qianyi Hui. Comparison of Community Composition and Function of Particle-associated Microorganisms and Free-living Microorganisms in the Mariana Trench. Academic Journal of Environment & Earth Science (2024), Vol. 6, Issue 3: 20-29. https://doi.org/10.25236/AJEE.2024.060303.

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