The Microbial community composition and function in each land
type
The taxa from the fungal community were fell into six phyla with
Ascomycota and Basidiomycota dominant (Fig. 2). Ascomycota was the most
dominant phylum in sandy land and shrub land samples (76.09 and 74.06%,
respectively), while Basidiomycota was the most dominant in forest
samples (62.92%). Zygomycota in shrub land samples (10.97%) was
significantly higher than sandy land and forest land samples (2.17 and
3.27%, respectively). Chytridiomycota in sandy soil (1.51%) was
significantly higher than shrub land and pine plantation land soil (0.50
and 0.10%, respectively), although it takes a small proportion in each
land type samples. The other two phyla have no significant difference
between land types.
The taxa from the bacterial community were fell into thirty-two phyla,
and Chloroflexi, Actinobacteria, Proteobacteria, and Acidobacteria with
the dominant. Chloroflexi was the most dominant phylum in this region
(Fig. 2B1, Fig. S3), and there was no significant difference between the
three land types. Also, the Actinobacteria phylum has no difference
among each land type. The phylum that their relative abundance has
significant differences between land types including Proteobacteria,
Acidobacteria, Planctomycetes, Nitrospirae, Bacteroidetes,
Verrucomicrobia, Deinococcus-Thermus, Fusobacteria, and WS2 phylum.
Proteobacteria phylum in sandy land samples (25.79%) was significantly
higher than shrub land and forest land samples (13.22% and 15.72%,
respectively). While Acidobacteria in sandy land samples (7.45%) was
significantly lower than shrub land and forest samples (15.55% and
13.75%, respectively). Planctomycetes and Nitrospirae phylum showed the
highest relative abundance in the shrub land samples (5.49% and 1.03%,
respectively), intermediate in the forest samples (3.11% and 0.89%,
respectively), and lowest in the sandy land samples (1.76% and 0.37%,
respectively). Bacteroidetes showed that the highest relative abundance
in the sandy land (1.44%), intermediate abundance in the forest
(0.40%), and lowest abundance in the shrub land (0.18%).
Verrucomicrobia phylum in the forest (0.34%) and shrub land samples
(0.18%) were higher than sandy land (0.01%). Deinococcus-Thermus and
Fusobacteria phylum was significantly higher in sandy land (0.05% and
0.03%, respectively). On the contrary, WS2 phylum was significantly
higher in forest samples (0.01%), although take a small proportion.
The Venn diagram showed that OTUs of fungi and bacteria differed among
the three land types (Fig. 2, A2, and B2). The number of specific fungal
OTUs was 453 in sandy land, 321 in shrub land, and 188 in forest land,
and the number of specific bacteria OTUs was 469 in sandy land, 497 in
shrub land, and 414 in the forest. Besides, the OTUs of fungi and
bacteria that shared among all three land types were 151 and 1318,
respectively.