Abstract:
BACKGROUND:Saudi Arabia is mostly barren except the southwestern highlands that are susceptible to environmental changes, a hotspot for biodiversity, but poorly studied for microbial diversity and composition. In this study, 454-pyrosequencing of 16S rRNA gene hypervariable region V6 was used to analyze soil bacterial community along elevation gradients of the southwestern highlands. RESULTS:In general, lower percentage of total soil organic matter (SOM) and nitrogen were detected in the analyzed soil samples. Total 33 different phyla were identified across the samples, including dominant phyla Proteobacteria, Actinobacteria and Acidobacteria. Representative OTUs were grouped into 329 and 508 different taxa at family and genus level taxonomic classification, respectively. The identified OTUs unique to each sample were very low irrespective of the altitude. Jackknifed principal coordinates analysis (PCoA) revealed, overall differences in the bacterial community were more related to the quantity of specific OTUs than to their diversity among the studied samples. CONCLUSIONS:Bacterial diversity and soil physicochemical properties did not show consistent changes along the elevation gradients. The large number of OTUs shared between the studied samples suggest the presence of a core soil bacterial community in the southwestern highlands of Saudi Arabia.
journal_name
BMC Microbioljournal_title
BMC microbiologyauthors
Yasir M,Azhar EI,Khan I,Bibi F,Baabdullah R,Al-Zahrani IA,Al-Ghamdi AKdoi
10.1186/s12866-015-0398-4subject
Has Abstractpub_date
2015-03-14 00:00:00pages
65issn
1471-2180pii
10.1186/s12866-015-0398-4journal_volume
15pub_type
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