Diversity and seasonal distribution of ammonia-oxidizing archaea in the water column of a tropical estuary along the southeast Arabian Sea

Vipindas, Puthiya Veettil; Jabir, T.; Corso, Jasmin; Tharakan, Balu; Rehitha, T.V.; Adarsh, B.M.; Nair, Shanta; Hatha, A. A. Mohamed; Anas, Abdulaziz

doi:10.1007/s11274-018-2570-0

Cited by 8 publications

(1 citation statement)

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“…Coastal marine ecosystems, especially estuaries are diversified by varying environmental conditions (such as those mentioned above) and distinct types and strength of anthropogenic disturbances [ 10 , 13 , 18 , 54 ], which leads to the difficulty in capturing common patterns in niche partitioning of archaea. Therefore, simultaneous survey of major representative estuaries along the geographic gradient could provide insights into common and distinct patterns of archaeal community in this typical coastal ecosystem.…”

Section: Resultsmentioning

confidence: 99%

Distinct patterns of distribution, community assembly and cross-domain co-occurrence of planktonic archaea in four major estuaries of China

Hu,

Huang,

et al. 2023

Environmental Microbiome

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Background Archaea are key mediators of estuarine biogeochemical cycles, but comprehensive studies comparing archaeal communities among multiple estuaries with unified experimental protocols during the same sampling periods are scarce. Here, we investigated the distribution, community assembly, and cross-domain microbial co-occurrence of archaea in surface waters across four major estuaries (Yellow River, Yangtze River, Qiantang River, and Pearl River) of China cross climatic zones (~ 1,800 km) during the winter and summer cruises. Results The relative abundance of archaea in the prokaryotic community and archaeal community composition varied with estuaries, seasons, and stations (reflecting local environmental changes such as salinity). Archaeal communities in four estuaries were overall predominated by ammonia-oxidizing archaea (AOA) (aka. Marine Group (MG) I; primarily Nitrosopumilus), while the genus Poseidonia of Poseidoniales (aka. MGII) was occasionally predominant in Pearl River estuary. The cross-estuary dispersal of archaea was largely limited and the assembly mechanism of archaea varied with estuaries in the winter cruise, while selection governed archaeal assembly in all estuaries in the summer cruise. Although the majority of archaea taxa in microbial networks were peripherals and/or connectors, extensive and distinct cross-domain associations of archaea with bacteria were found across the estuaries, with AOA as the most crucial archaeal group. Furthermore, the expanded associations of MGII taxa with heterotrophic bacteria were observed, speculatively indicating the endogenous demand for co-processing high amount and diversity of organic matters in the estuarine ecosystem highly impacted by terrestrial/anthropogenic input, which is worthy of further study. Conclusions Our results highlight the lack of common patterns in the dynamics of estuarine archaeal communities along the geographic gradient, expanding the understanding of roles of archaea in microbial networks of this highly dynamic ecosystem.

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