0 avis
Anthropic disturbances impact the soil microbial network structure and stability to a greater extent than natural disturbances in an arid ecosystem
Archive ouverte
Demultiplexed sequence data are available at NCBI (Bio-project PRJNA1028866, Biosamples SAMN37854590 to SAMN37854744). Soil XRF raw datas are available in Supplementary file 1. Extended PERMANOVA are available in Supplementary file 2. Phylum level of positive and negative interactions proportion for each bacteria network are listed in Supplementary file 3. Phylum level of positive and negative interactions proportion for each bacteria-fungi networks are listed in Supplementary file 4. ANCOVA results for the stability analysis of each network with the paired comparisons with the estimated marginal means method is available in Supplementary file 5. Module and network hubs taxonomical information, topology, Zi and Pi values are listed in Supplementary file 6. Proportion of taxa roles in each network is available in Supplementary file 7.. International audience. Highlights: • Diversity was insufficient to assess microbial response to environmental stress. • Rhizosphere networks differed between long- and short-termed disturbances. • Short-termed anthropic disturbances resulted in the lower network stability. • Natural environments and long termed disturbances favor network stability. • Fungi improved the crossdomain networks stability in the long-termed disturbance.Abstract: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Yet little is known about microbial community resistance and adaptation to disturbances over time. This hampers our ability to determine the recovery latency of microbial interactions after disturbances, with fundamental implications for ecosystem functioning and conservation measures. Here we examined the response of bacterial and fungal community networks in the rhizosphere of Haloxylon salicornicum (Moq.) Bunge ex Boiss. over the course of soil disturbances resulting from a history of different hydric constraints involving flooding-drought successions. An anthropic disturbance related to past agricultural use, with frequent successions of flooding and drought, was compared to a natural disturbance, i.e., an evaporation basin, with yearly flooding-drought successions. The anthropic disturbance resulted in a specific microbial network topology characterized by lower modularity and stability, reflecting the legacy of past agricultural use on soil microbiome. In contrast, the natural disturbance resulted in a network topology and stability close to those of natural environments despite the lower alpha diversity, and a different community composition compared to that of the other sites. These results highlighted the temporality in the response of the microbial community structure to disturbance, where long-term adaptation to flooding-drought successions lead to a higher stability than disturbances occurring over a shorter timescale.
Consulter en ligne
Suggestions
Du même auteur
