Using PCR and a pair of specific primers, archaeal small subunit 16S rRNA genes were selectively amplified from total genomic DNA extracted from the microbial community in the leachate of a full-scale sanitary landfill, and an archaeal 16S rDNA clone library was subsequently established. Clones were screened by colony hybridization with an archaeal oligonucleotide probe, and diversity of amplified 16S rDNA fragments in the library was gained by a restriction fragment length analysis (ARDRA). The cloned 16S ...