Distribution of clone numbers in nirK and nosZ gene libraries.

Note: *Sponge: 1 is A. queenslandica from the Linshui port; 2 is S. vesparium from the Linshui port; 3 is Iotrochota sp. from Yongxing Island; 4 is X. testudinaria from Yongxing Island; 5 is C. australiensis sp. from Yongxing Island; 6 is Cinachyrella sp. from Yongxing Island. The BLAST analysis was based on amino acid sequences.备注：*海绵（Sponge）样品：1号为采自陵水港的A. queenslandica；2号为采自陵水港的S. vesparium；3号为采自永兴岛的Iotrochota sp.；4号为采自永兴岛的X. testudinaria；5号为采自永兴岛的C. australiensis sp.；6号为采自永兴岛的Cinachyrella sp.。本次BLAST（Basic Local Alignment Search Tool）分析基于氨基酸序列开展。