Figure 1From: Shotgun metagenomic analysis of metabolic diversity and microbial community structure in experimental vernal pools subjected to nitrate pulseSubsystem matches in the nitrogen metabolism category. The proportional numbers of environmental gene tags that matched with level 2 sequences within the nitrogen metabolism subsystem category for the +NO3- (solid bars) and –N (open bars) metagenomes. No significant differences were found when these sequences were analyzed with Fisher exact tests in the Statistical Analysis of Metagenomic Profiles program.Back to article page