Niche partitioning of microbial communities in riverine floodplains.

摘要: Riverine floodplains exhibit high floral and faunal diversity as a consequence of their biophysical complexity. Extension such niche partitioning processes to microbial communities is far less resolved or supported. Here, we evaluated the responses aquatic biofilms environmental gradients across ten riverine with differing degrees flow alteration habitat assess whether complex support biofilm greater biodiversity species interactions. No significant evidence was found central role for in promoting 116 samples derived from 62 habitats, neither α (H’: 2.8–4.1) nor β (Sorensen: 0.3–0.39) were positively related floodplain complexity floodplains. In contrast, our results documented sensitivity regional templates manifested carbon, nitrogen, phosphorous availability. Large-scale conditions reflecting nitrogen limitation increased relative abundance N-fixing cyanobacteria (up 0.34 fraction total reads), constrained number interactions among bacterial taxa, reinforced negative over positive interactions, generating unique networks that reflect large-scale sorting response geochemical gradients.