Changes in alpine grassland type drive niche differentiation of nitrifying communities on the Qinghai‒Tibetan Plateau

Qi, Xing-e; Wang, Chen; He, Tianjiao; Ding, Fan; Li, Aorui; Zhang, Xinfang; An, Lizhe; Xu, Shou‐Jun

doi:10.1016/j.ejsobi.2021.103316

Cited by 7 publications

(2 citation statements)

References 66 publications

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“…Co-occurrence patterns are helpful for evaluating changes in microbial community structure and provide insights into potential microbial interactions 46 . Banerjee et al 47 indicated that intensive agricultural production could decrease the network complexity of bacteria.…”

Section: Discussionmentioning

confidence: 99%

Fertilization altered co-occurrence patterns and microbial assembly process of ammonia-oxidizing microorganisms

Zhao

Jiang

et al. 2023

Sci Rep

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Ammonia-oxidizing archaea and bacteria (AOA and AOB, respectively) are important intermediate links in the nitrogen cycle. Apart from the AOA and AOB communities in soil, we further investigated co-occurrence patterns and microbial assembly processes subjected to inorganic and organic fertilizer treatments for over 35 years. The amoA copy numbers and AOA and AOB communities were found to be similar for the CK and organic fertilizer treatments. Inorganic fertilizers decreased the AOA gene copy numbers by 0.75–0.93-fold and increased the AOB gene copy numbers by 1.89–3.32-fold compared to those of the CK treatment. The inorganic fertilizer increased Nitrososphaera and Nitrosospira. The predominant bacteria in organic fertilizer was Nitrosomonadales. Furthermore, the inorganic fertilizer increased the complexity of the co-occurrence pattern of AOA and decreased the complexity pattern of AOB comparing with organic fertilizer. Different fertilizer had an insignificant effect on the microbial assembly process of AOA. However, great difference exists in the AOB community assembly process: deterministic process dominated in organic fertilizer treatment and stochastic processes dominated in inorganic fertilizer treatment, respectively. Redundancy analysis indicated that the soil pH, NO3−N, and available phosphorus contents were the main factors affecting the changes in the AOA and AOB communities. Overall, this findings expanded our knowledge concerning AOA and AOB, and ammonia‐oxidizing microorganisms were more disturbed by inorganic fertilizers than organic fertilizers.

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Section: Discussionmentioning

confidence: 99%

Fertilization altered co-occurrence patterns and microbial assembly process of ammonia-oxidizing microorganisms

Zhao

Jiang

et al. 2023

Sci Rep

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“…Mutualism, parasitism, competition, predation and other associations within highly diverse microbial communities can form complex co‐occurrence networks (Ma et al, 2016). Network analysis has emerged as the most powerful analytical method to explore species associations in various ecosystems (Qi et al, 2021; Wang, Liu, et al, 2021). Network topological features, such as graph density, can reflect the level of connectivity and associations among microorganisms (Deng et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Planktonic archaea reveal stronger dispersal limitation and more network connectivity than planktonic bacteria in the Jinsha River of southwestern China

Cui,

Chen,

Wang

et al. 2023

Freshwater Biology

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Planktonic archaea and bacteria play important roles in biogeochemical cycling, but their biogeographical patterns and underlying ecological processes remain poorly understood, particularly in large‐scale rivers. We collected 43 water samples covering a 2279 km reach of the Jinsha River, one of the largest rivers in southwest China, and performed high‐throughput sequencing analysis on planktonic archaeal and bacterial communities. Partial Mantel analysis and neutral model were used to assess the factors influencing microbial distributions. The associations among different microbial species and their geographical distribution patterns were linked through co‐occurrence networks, and the putative key taxa in the archaeal and bacterial networks were analysed. The Shannon index of both archaeal and bacterial communities was highest in the midstream reach. The Pielou's evenness of archaea did not vary among the three reaches, whereas those of bacteria increased from upstream to downstream. The archaeal and bacterial community compositions were significantly different in the three reaches, but the differences among the bacterial communities were greater than among the archaeal communities. Both dispersal limitation and environmental selection affected the community compositions of the archaea and bacteria, but dispersal limitation was the most influential factor. Compared to archaea, bacteria were less affected by dispersal limitation and more by environmental selection. The co‐occurrence network analysis demonstrated that, compared with the bacterial network of all sites, the archaeal network with larger graph density had higher connectivity and complexity, but a lower proportion of negative correlations. The putative key taxa belonged to Nitrososphaeraceae and Candidatus_Nitrocosmicus from the archaeal community, and Hydrogenophaga and Sphingorhabdus from the bacterial community. Taken together, these findings demonstrated that the planktonic archaea were more dispersal‐limited and showed more network connectivity than the planktonic bacteria in the Jinsha River. This study enhances our understanding of the biogeographical distribution patterns and underlying ecological processes of planktonic microorganisms over large‐scale freshwater systems.

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Beneath the Surface: Investigating soil microbial and metazoa communities at various depths in a natural desert ecosystem inhabited by Karelinia caspia

Islam,

Zeng,

Mubarak Alwutayd

et al. 2024

Ecological Indicators

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Changes in alpine grassland type drive niche differentiation of nitrifying communities on the Qinghai‒Tibetan Plateau

Cited by 7 publications

References 66 publications

Fertilization altered co-occurrence patterns and microbial assembly process of ammonia-oxidizing microorganisms

Fertilization altered co-occurrence patterns and microbial assembly process of ammonia-oxidizing microorganisms

Planktonic archaea reveal stronger dispersal limitation and more network connectivity than planktonic bacteria in the Jinsha River of southwestern China

Beneath the Surface: Investigating soil microbial and metazoa communities at various depths in a natural desert ecosystem inhabited by Karelinia caspia

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