Marine Biotechnology Laboratory;
State Key Laboratory of Microbial Metabolism;
School of Life Sciences and Biotechnology;
Shanghai Jiao Tong University;
Shanghai 200240;
China;
Joint International Research Laboratory of Metabolic&Developmental Sciences;
Shanghai Jiao Tong University;
Shanghai 200240;
China;
Department of Chemistry and Biotechnology;
Division of Gene Technology;
Tallinn University of Technology;
Estonia;
Spheciospongia vesparium; bacterial symbionts; 454 pyrosequencing; functional gene analysis; nitrogen-cycling net-work;