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"accession": "MGYS00001425",
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"last-update": "2017-01-16T11:15:17",
"secondary-accession": "ERP010004",
"centre-name": "CHINESE ACADEMY OF SCIENCES",
"public-release-date": null,
"study-abstract": "Nitrogen (N) deposition influences both above- and belowground communities and influences ecosystem functioning. However the mechanisms underlying alternations in bacterial communities following N enrichment remain elusive, as does an integrated understanding of plant-soil-microbe interactions. In this study, the responses of soil bacterial community composition and diversity to N enrichment were investigated at surface (0-10 cm) and sub-surface (10-20 cm) soils in a temperate steppe ecosystem. N addition (>120 kg N ha -1 yr -1 ) resulted in a significant shift in bacterial community composition and a decrease in bacterial diversity in surface soil, but the effect on the sub-surface layer was far less pronounced, even at the highest addition rate (240 kg N ha -1 yr -1 ). Bacterial community composition was significantly correlated with soil and plant characteristics. Hierarchical structural equation modeling showed that soil ammonium availability was responsible for the shift in bacterial richness, whereas alternation in soil pH and plant composition contributed to the change in bacterial communities. Our results suggest that N fertilization directly affects soil bacterial richness and indirectly affects bacterial communities via soil acidification and changes in plant composition. This indicates that N addition in a temperate steppe ecosystem influences soil bacterial diversity and community composition in an inconsistent manner.",
"study-name": "Nitrogen fertilization directly affects soil bacterial diversity and indirectly affects bacterial community composition through soil acidification and plant community changes in grassland",
"data-origination": "SUBMITTED"
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