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3. The authors of the same paper looked at gene annotations in their metagenomes to look for numbers of genes related to carbohydrate metabolism. Describe this data (I only included part C of the figure), then explain how that fits with your expectations given what we talked about in class. Would you expect soil microbial communities to show an increase or decrease in capacity to carry out carbohydrate metabolism, when fertilized? Does that fit with the observed data? Unclassified metabolism Carbohydrate metabolism • Konza LTER • Andrews LTER • Saline Experimental Range • Shortgrass Steppe LTER Sierra Foothills REC -0.5- . Duke Forest N P NP N P NP Nutrient treatment Fig. 4. Shifts in metagenomic characteristics with the addition of nutrients. Differences in the proportion of annotated genes (A), effective genome size (B), and the relative abundance of metabolic genes (C) are shown with boxplots and mean responses for each site (points). Gene categories in C were chosen by selecting those that most greatly differed between control and treatment plots (P < 0.02 for each; Table S6). % difference from contol 1.0 0.5- 0.0-