How to disentangle microbially functional complexity: an insight from the network analysis of C, N, P and S cycling genes
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摘要:
A complete ecosystem is also a complex network in which multifarious species interact with each other to achieve system-level functions,such as nutrient biogeochemistry [1].Microbial community is commonly considered as the primary driving force of ecosystem nutrient mobilization and metabolism,especially carbon (C),nitrogen (N),phosphorus (P),sulfur (S) and methane coupling process [2].The rise of metagenomics and high-throughput array (e.g.PhyloChip,GeoChip,etc.) technologies enable acquiring the detailed information on microbial community functional gene abundance and diversity [3,4];however,there has been far less attention focusing on the direct and indirect interactions between nutrient cycling genes coexisting in environmental samples.Documenting these interactions between functional genes across diverse microbial communities may help to clarify the functional roles and even environmental niches in different contexts [5].With the increasing accumulation of functional gene data from modern high-throughput technologies,we are facing the challenge of those interaction explorations,and to extend analyses beyond sole abundance and diversity comparisons.