Abstract:
:Turf, consisting of closely spaced grasses and the subtending soil, is a unique ecosystem subject to intense management. Yet soil organic matter accumulates quickly and reaches equilibrium after 20 to 50 years. Resource availability is an important driver of species richness and theoretically their relationship is expected to be unimodal. In this work, we examined the effects of turf development (i.e. a 1, 15, 20 and 109 year-old chronosequence) on microbial taxon richness, community composition, and abundances of genes putatively involved in N cycling through 16S rRNA gene and ITS region amplicon sequencing. Microbial alpha-diversity remained relatively stable although soil organic C and N increased by up to 3-fold over a century-long turf development. However, both bacterial and fungal community compositions changed substantially from those in the previous land use, pine stands and along turf development. Youngest turf was closer to the oldest turf than to middle-aged ones, specifically for bacterial community. Microbial changes to resource availability were also taxonomically specific. The relative abundance of Proteobacteria was independent of resource availability; Nitrospirae increased monotonically, and Bacteroidetes, Actinobacteria and Glomeromycota varied curvilinearly. However, abundances of most taxa from the phylum to operational taxonomic unit level and N-cycling genes varied nonlinearly with turf development.
journal_name
FEMS Microbiol Ecoljournal_title
FEMS microbiology ecologyauthors
Chen H,Xia Q,Yang T,Bowman D,Shi Wdoi
10.1093/femsec/fiy224subject
Has Abstractpub_date
2019-02-01 00:00:00issue
2eissn
0168-6496issn
1574-6941pii
5184450journal_volume
95pub_type
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